us 3570129

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http://slidepdf.com/reader/full/us-3570129 1/8

March 1 6 , 1911 J , T . DEL'VECCHm 3 , 5 7 0 , 1 2 9

ENGRAVING 1 1 1 1 0 1 1 1 1 1 1 2 :

Filed March 6 , 1 9 68 a Sheets-Sheet 1

INVENTOR.

JOSEPH 1 . De\ vsccmo

BY

HwaM

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March 1 6, 1971 J . T . DEL VECCHIO , 3,570,129

ENGRAVING MACHINE

Filed March 6 , 1968 I 5 Sheets—Sheet I

F / 6 . 2 ~

INVENTOR.

JOSEPH T . D e l VECCHIO

/ / i ~ 1 1 : 1 1 ' ( Y 4 : 5 4 2 »7 7 0 2 / 1 / 5 /

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U n i t e d S t a t e s P a t e n t 0 i c e

1

3 , 5 7 0 , 1 2 9

ENGRAVING MACHINEJ o s e p h T . D e l V e c c h i o , M a n u e t , N . Y . , a s s i g n o r t o G r a n l i pC o r p o r a t i o n , New Y o r k , N . Y .

F i l e d M a r . 6 , 1 9 6 8 , S e r . N o . 7 1 0 , 8 3 8I n t . C l . B 4 3 1 13/10

U . S . C ] . 3 3-25 1 0 C l a i m s

ABSTRACT OF THE DISCLOSURE

An e n g r a v i n g m a c h i n e w i t h a n e n g r a v i n g t o o l h a v i n g

a ? r s t member r e c i p r o c a l l y movable i n a p l a n e t r a n s

v e r s e t o t h e a x i s o f t h e engraving t o o l and a second

member mounted on s a i d ? r s t member and r e c i p r o c a l l y

movable i n t h a t p l a n e a t r i g h t a n g l e s t o t h e movemento f t h e ? r s t member. The s e c o n d member i n c l u d e s j a w s

on which a r e mounted t h e a r t i c l e s t o be e n g r a v e d , which

j a w s a r e normally b i a s e d c l o s e d and a r e opened and

c l o s e d s i m u l t a n e o u s l y b y cam a c t i o n .

T h i s i n v e n t i o n r e l a t e s t o a machine f o r e n g r a v i n g

l e t t e r s , i n s i g n i a o r o t h e r m a r k i n g s on a r t i c l e s o f j e w e l r y

o r o t h e r o b j e c t s , and i n p a r t i c u l a r , l e t t e r s o r c h a r a c t e r s

r e p r o d u c e d from a p a t t e r n by means o f a p a n t o g r a p h

o r t h e l i k e l i n k a g e on o b j e c t s r e l e a s a b l y h e l d i n ?xed

r e l a t i v e p o s i t i o n t o t h e e n g r a v i n g t o o l .P r e s e n t l y t h e r e a r e v a r i o u s t y p e s o f e n g r a v i n g ma

c h i n e s on t h e m a r k e t f o r e n g r a v i n g t r o p h i e s , p l a q u e s ,

? n g e r r i n g s a n d s i m i l a r i t e m s . Most o f t h e s e e n g r a v i n g

machines u t i l i z e a s t y l u s t h a t i s p l a c e d i n and moved t o

f o l l o w i n d i v i d u a l g u i d e l e t t e r s o r s t e n c i l s . An n g r a v i n g

o r w o r k i n g t o o l i s p o s i t i o n e d t o s i m u l t a n e o u s l y e n g a g e

t h e a r t i c l e t o be engraved and form o r c u t t h e i n d i v i d u a l

l e t t e r s o r marking on t h e a r t i c l e , r e s p o n s i v e t o movemento f t h e s t y l u s . I n o r d e r t o e n g r a v e p r o p e r l y , t h e a r t i c l et o be engraved must be ?rmly h e l d , s o a s not t o move

d u r i n g t h e e n g r a v i n g p r o c e s s . S i n c e t h e s e e n g r a v i n g mac h i n e s a r e i n t e n d e d t o engrave v a r i o u s t y p e s o f a r t i c l e s

o f d i f f e r e n t s i z e s , s h a p e s a n d f o r m s , t h e manner o f h o l d i n g

t h e a r t i c l e i s an i m p o r t a n t p a r t o f an a l l purpose e n g r a v

i n g m a c h i n e . H e r e t o f o r e , f o r t h e s e a r t i c l e s t o b e ? r m l yh e l d r e q u i r e d an undue c o m p r e s s i v e f o r c e on t h e a r t i c l e

o r o b j e c t , o f t e n t i m e s m a r r i n g o r d e f o r m i n g i t . F u r t h e r ,

t h e a r t i c l e h o l d e r s o f t h e s e e n g r a v i n g m a c h i n e s r e q u i r e d

many hand movements o f t h e o p e r a t o r t o p r o p e r l y p o s i

t i o n t h e a r t i c l e w i t h r e s p e c t t o t h e work t o o l . O p p o s i t e

t h r e a d e d s h a f t s were used t o move t h e j a w s and a p p l y a

c o m p r e s s i v e f o r c e . The p r e s e n t i n v e n t i o n a l l o w s v a r i o u s

t y p e s o f o b j e c t s o r a r t i c l e s t o b e ?rmly h e l d d u r i n g t h e

e n g r a v i n g o p e r a t i o n w i t h o u t r e q u i r i n g u n d u e c o m p r e ss i v e f o r c e on a d e l i c a t e a r t i c l e and which a l l o w s t h e

o b j e c t t o b e q u i c k l y p o s i t i o n e d r e l a t i v e t o t h e e n g r a v i n g

t o o l .

A c c o r d i n g l y , i t i s a n o b j e c t o f t h e p r e s e n t i n v e n t i o n

t o p r o v i d e an e n g r a v i n g machine h a v i n g an a r t i c l e h o l d

i n g mechanism w h i c h w i l l h o l d a r t i c l e s o f v a r i o u s s i z e sa n d s h a p e s a n d f o r m s , c o n v e n i e n t l y a n d s e c u r e l y d u r i n g

t h e e n g r a v i n g p r o c e s s , w i t h o u t e x e r t i n g undue c o m p r e s

s i v e f o r c e on t h e s e a r t i c l e s , e v e n hollow o b j e c t s .

A n o t h e r o b j e c t o f t h e p r e s e n t i n v e n t i o n i s t o p r o v i d e

a n e n g r a v i n g a p p a r a t u s h a v i n g a n a r t i c l e h o l d i n g a p

p a r a t u s f o r q u i c k l y a n d s e c u r e l y h o l d i n g a n d c e n t e r i n gt h e a r t i c l e s t o b e e n g r a v e d , a n d w h i c h h o l d i n g a p p a r a t u s

c a n b e r o t a t e d i n p r e d e t e r m i n e d i n c r e m e n t s , and which

1 5

20

25

35

60

65

a p p a r a t u s can be q u i c k l y and e a s i l y a d j u s t a b l e by t h e ‘e n g r a v e r .

A u r t h e r o b j e c t o f t h e p r e s e n t i n v e n t i o n i s t o p r o v i d e

an e n g r a v i n g b l o c k f o r u s e w i t h i n an e n g r a v i n g m a c h i n e ,

w h i c h r e l e a s a b l y h o l d s a r t i c l e s o f v a r y i n g s i z e s , s h a p e s

and f o r m s i n e n g r a v i n g p o s i t i o n w i t h r e s p e c t t o t h e e n

7 0

3 , 5 7 8 , 1 2 9P a t e n t e d Mar. 1 6 , 1 9 7 1

2

g r a v i n g t o o l , w h i c h i s s o s i m p l e a n d e f ? c i e n t i n o p e r a t i o n

a n d c o n s t r u c t i o n t h a t i t may b e o p e r a t e d by a p e r s o n

wh o i s s u b s t a n t i a l l y u n s k i l l e d a n d u n t a u g h t i n t h e a r t o f

e n g r a v i n g , a n d w h i c h i s p o s i t i v e i n o p e r a t i o n a n d d u ra b l e i n u s e .

S t i l l a n o t h e r o b j e c t o f th e p r e s e n t i n v e n t i o n i s t o p r o

v i d e a n e n g r a v i n g b l o c k f o r e n g r a v i n g m a c h i n e s which

c a n b e i n c o r p o r a t e d i n t o e x i s t i n g e n g r a v i n g m a c h i n e s ,

and which can q u i c k l y h o l d and c e n t e r a r t i c l e s t o be

e n g r a v e d , w h i c h a r t i c l e s v a r y i n s i z e , s h a p e a n d f o r m ,

a n d w h i c h q u i c k l y r e l e a s e s t h e e n g r a v e d a r t i c l e b y a

s i m p l e movement o f t h e o p e r a t o r .

Yet a n o t h e r o b j e c t o f t h e p r e s e n t i n v e n t i o n i s t o p r o

v i d e f o r a n e n g r a v i n g m a c h i n e , a n a s s e m b l y f o r h o l d i n g

t h e a r t i c l e t o b e e n g r a v e d , which i s e a s i l y c e n t e r e d w i t h

r e s p e c t t o t h e e n g r a v i n g t o o l , a n d w h i c h i s v e r s a t i l e i ni t s a p p l i c a t i o n s o t h a t s m a l l a s w e l l a s bulky a r t i c l e s may

b e h e l d w i t h i n t h e work h o l d e r p o s i t i v e l y a n d s y m m e t r ic a l l y , and which i s e a s y t o u s e s o t h a t i n e x p e r i e n c e d op

e r a t o r s may s e c u r e a s a t i s f a c t o r y e n g r a v i n g j o b q u i c k l y

a n d e c o n o m i c a l l y , a n d a l l o w c h a n g e - o v e r from o n e t y p e

o f a n a r t i c l e t o a n o t h e r , q u i c k l y a n d e ? i c i e n t l y .O t h e r a n d f u r t h e r o b j e c t s a n d f e a t u r e s o f t h e p r e s e n t

i n v e n t i o n w i l l become a p p a r e n t t o t h o s e s k i l l e d i n t h e

a r t from a c o n s i d e r a t i o n o f t h e a t t a c h e d d r a w i n g s , i n

which o n e embodiment o f t h e i n v e n t i o n i s i l l u s t r a t e d by

way o f e x a m p l e o n l y a n d w h e r e i n :

‘ F I G . 1 i s a p e r s p e c t i v e v i e w o f an e n g r a v i n g machine

h a v i n g a work h o l d e r made i n a c c o r d a n c e w i t h t h e

p r e s e n t i n v e n t i o n ;FIG. 2 i s a t o p p l a n v i e w o f t h e Work h o l d e r a s s e m b l y ;

F I G . 3 i s a c r o s s - s e c t i o n a l v i e w t a k e n a l o n g l i n e 3 - — 3

o f FIG. 2 ;FIG. 4 i s a c r o s s - s e c t i o n a l view t a k e n a l o n g l i n e 4—4

o f FIG. 2 ;FIG. 5 i s a c r o s s - s e c t i o n a l v i e w t a k e n a l o n g l i n e 5-5

o f FIG. 2 ;‘ F I G . 6 i s a c r o s s - s e c t i o n a l v i e w t a k e n a l o n g l i n e 6——6

o f FIG. 2 ;FIG. 7 i s a c r o s s - s e c t i o n a l v i e w t a k e n a l o n g l i n e 7—7

o f FIG. 3 ; and

FIG. 8 i s a c r o s s - s e c t i o n a l v i e w t a k e n a l o n g l i n e 8-8

o f FIG. 2 .

R e f e r r i n g t o t h e d r a w i n g s , n u m e r a l 1 0 d e s i g n a t e s a

b o d y member p r e f e r a b l y made o f m e t a l w h i c h c o u l d b e

o f d i e c a s t c o n s t r u c t i o n . Body 1 0 h a s a ? a t b a s e s u r f a c e

1 2 h a v i n g s u p p o r t members 1 4 . Each o f s u p p o r t mem

b e r s 14 c o u l d have on i t s r e s p e c t i v e bottom s u r f a c e ac u s h i o n member ( n o t shown) s o t h a t t h e d e v i c e ma y b e

placed on a t a b l e or o t h e r ?nished s u r f a c e without mar

r i n g o r d e f a c i n g i t .

E x t e n d i n g u p w a r d l y from t h e r e a r o f body member 1 0

a r e a p a i r o f u p r i g h t s u p p o r t p o s t s 1 6 . P o s t s 1 6 a d j u s t

a b l y s u p p o r t a p a n t o g r a p h - t y p e e n g r a v i n g u n i t i l l u s t r a t e dg e n e r a l l y a t 1 8 . E n g r a v i n g u n i t 1 8 i s movable v e r t i c a l l y

w i t h r e s p e c t t o b a s e s u r f a c e 1 2 by means o f a s u p p o r t

a s s e m b l y 2 0 s l i d a b l y mounted on v e r t i c a l p o s t s 1 6 . Eng r a v i n g u n i t 1 8 i s p o s i t i o n e d r e l a t i v e t o b a s e s u r f a c e 1 2

b y t i g h t e n i n g k n o b 2 2 w h i c h c l a m p s members 2 1 t og e t h e r a b o u t p o s t s 1 6 f o r f r i c t i o n a l l y h o l d i n g s u p p o r t

a s s e m b l y 2 0 w i t h r e s p e c t t o p o s t s 1 6 . S u p p o r t a s s e m b l y

20 i s a t t a c h e d t o one o f clamp members 2 1 .

P i v o t a l l y mounted t o s u p p o r t a s s e m b l y 2 0 a b o u t p i n26 i s a s u p p o r t arm 2 3 . Pantograph 18 i s a c o n v e n t i o n a l

u n i t h a v i n g f o u r l e g s 2 4 , 2 8 , 3 0 , 3 2 , a n d i s a d j u s t a b l y

s u p p o r t e d by arm 2 3 . Leg 2 4 i s a x i a l l y movable a l o n g

arm 2 3 and i s s e l e c t a b l y c l a m p e d i n p o s i t i o n t h e r e t o by

t i g h t e n i n g l o c k i n g h a n d l e 2 5 f o r f r i c t i o n a l l y h o l d i n g l e g24 w i t h r e s p e c t t o arm 2 3 . Legs 2 4 , 2 8 , 30 and 32 a r e

p i v o t e d t o t h e i r a d j o i n i n g l e g s a n d l e g s 2 8 a n d 3 2 a r e

p i v o t e d t o l e g 2 4 , which f o r m s t h e f o u r t h s i d e o f a

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3 , 5 7 0 , 1 2 9

p a r a l l e l o g r a m . Mounted a t t h e end o f a n o u t w a r d l y e x

t e n d i n g p a r t o f l e g 2 8 ‘ i s a c y l i n d r i c a l h o u s i n g 3 3 w h i c hh a s a l o n g i t u d i n a l l y e x t e n d i n g o p e n i n g t h e r e i n . S l i d a b l y

mounted i n t h e o p e n i n g W i t h i n h o u s i n g 3 3 i s a t r a c i n g

s t y l u s 3 4 . T r a c i n g s t y l u s 3 4 h a s a g r i p knob o r h e a d3 6 mounted a t the upper end of a tubular plunger or

rod 3 8 , which i s s l i d a b l y mounted w i t h i n t h e opening

o f h o u s i n g 3 3 . The l o w e r end o f p l u n g e r 38 h a s a

g u i d e p o i n t 4 0 , w h i c h i s a d a p t e d t o ? t i n t o s t y l u s g u i d e

l e t t e r s a n d s t e n c i l s , i l l u s t r a t e d g e n e r a l l y i n a t y p e b a r

4 2 . Mounted on t h e l o w e r end o f p l u n g e r 38 a d j a c e n t

g u i d e p o i n t 4 0 i s a r a d i a l l y o u t w a r d l y e x t e n d i n g ? a n g e44 h a v i n g an o u t e r d i a m e t e r l a r g e r t h a n t h e d i a m e t e r

o f t h e o p e n i n g w i t h i n h o u s i n g 33 . Mounted a b o u t t h e

o u t e r p e r i p h e r a l s u r f a c e o f p l u n g e r 3 8 a n d i n t e r p o s e d

between knob 36 and t h e u p p e r end s u r f a c e o f h o u s i n g

33 i s a c o m p r e s s i o n s p r i n g 4 6 . S p r i n g 4 6 u r g e s p l u n g e r

38 t o w a r d s i t s e l e v a t e d p o s i t i o n and h a s t h e upper s u r

f a c e o f ? a n g e 44 e n g a g i n g t h e l o w e r s u r f a c e o f ‘ h o u s i n g

3 3 . A d v a n t a g e o u s l y , knob 36 h a s an i n t e r i o r l y d i r e c t e d

c o n c e n t r i c r e c e s s t h e r e i n ( n o t shown) which r e c e i v e s

s p r i n g ‘ 4 6 when k n o b 3 6 i s f u l l y d e p r e s s e d .

Type b a r 4 2 i s s l i d a b l y movable i n g u i d e l e t t e r a s s e m

b l y 5 0 . As s h o w n , g u i d e l e t t e r a s s e m b l y 5 0 i s p o s i t i o n e d

on a p a i r o f v e r t i c a l s u p p o r t c o l u m n s 5 2 , s l i d a b l y

mounted on body member 1 0 . Assembly ‘ 5 0 can be

p o s i t i o n e d v e r t i c a l l y r e l a t i v e t o b a s e 1 2 b y t i g h t e n i n g k n o b5 3 which f r i c t i o n a l l y e n g a g e s a ? a t t e n e d p o r t i o n 5 2 aon column 5 2 . T y pe b a r 42 h a s c u t t h e r e i n a p l u r a l i t y

o f g r o o v e s forming a s e r i e s o f l e t t e r s o r m a r k i n g s ,

w i t h e a c h l e t t e r o r marking a d v a n t a g e o u s l y b e i n g comp l e t e l y t r a c e d w i t h o u t r e m o v i n g t r a c i n g s y l u s o r ‘ g u i d e

p o i n t 4 0 from t h e g r o o v e s . F u r t h e r , t y p e b a r 4 2 i s p r o

v i d e d w i t h a s e r i e s o f v e r t i c a l l i n e s 4 3 , which a r e p o s i

t i o n e d b e n e a t h t h e c e n t e r o f e a c h o f t h e l e t t e r s o r mark

i n g s t h e r e o n t o a i d i n o p e r a t i n g t h e d e v i c e . E x t e n d i n gh o r i z o n t a ll y a c r o s s g u i d e l e t t e r a s s e m b l y 5 0 a d j a c e n t t h e

upper l o n g i t u d i n a l e d g e o f t y p e b a r 42 i s a l e t t e r g u i d e

5 4 . L e t t e r g u i d e ' 5 4 h a s e q u a l g r a d u a t i o n s on i t s u p p e r

s u r f a c e e x t e n d i n g from a c e n t r a l p o i n t marked 0 t o

a . p r e d e t e r m i n e d ? g u r e on o p p o s i t e s i d e s o f 0 * which

? g u r e i s shown a s 1 7 . These g r a d u a t i o n s a r e s p a c e d an

e q u a l d i s t a n c e a p a r t a n d a d v a n t a g e o u s l y t h e s p a c e s b e

tween t h e main g r a d u a t i o n s a r e s u b - d i v i d e d i n t o h a l v e s .

L o n g i t u d i n a l l y d i s p o s e d a n d mounted on g u i d e l e t t e ra s s e m b l y 5 0 a l o n g t h e b o t t o m e d g e o f t y p e b a r 4 2 a n dg e n e r a l l y c o p l a n a r w i t h g u i d e 5 4 i s a w r i t i n g s t r i p 5 6

h a v i n g a s e r i e s o f g r a d u a t i o n s o r m a r k i n g s t h e r e o n , g e ne r a l l y a l i g n e d w i t h t h e g r a d u a t i o n s o r m a r k i n g s on l e t t e rg u i d e 5 4 . Type b a r 42 i s s l i d a b l y movable b e t w e e n l e t t e r

g u i d e 5 4 a n d w r i t i n g s t r i p 5 6 , a n d i s a d a p t e d t o b e q u i c kl y c l a m p e d i n t o ? x e d p o s i t i o n d u r i n g t h e t r a c i n g o p e r a

t i o n , a s w i l l b e d i s c u s s e d . A d v a n t a g e o u s l y , l e t t e r g u i d e

54 and w r i t i n g s t r i p 56 a r e movable t o w a r d s and away

from e a c h o t h e r i n any c o n v e n i e n t manner f o r clamp

i n g t y p e b a r 42 ? x e d l y i n t o p o s i t i o n . One manner o f

a c c o m p l i s h i n g t h i s c l a m p i n g o p e r a t i o n i s b y means o f

a h a n d l e 58 a t t a c h e d t o g u i d e l e t t e r a s s e m b l y 5 0 and

c o u p l e d t o l e t t e r g u i d e ' 5 4 , s u c h a s by a s h a f t o r t h e l i k e ,

n o t s h o w n , t o move l e t t e r g u i d e 54 t o and from w r i t i n g

s t r i p 56 s o a s t o c l a m p t y p e b a r 4 2 i n t o ?xed p o s i t i o n ,

a s d e s i r e d .

F i x e d l y a t t a c h e d t o l e g 32 o f p a n t o g r a p h 1 8 i s an e n

g r a v i n g t o o l 6 0 , which a d v a n t a g e o u s l y h a s a diamondt i p 6 1 and i s a d j u s t a b l y a t t a c h e d t o a c u t t e r a s s e m b l y

' 6 2 , w h i c h a s s e m b l y i s movably mounted on l e g 32 o fp a n t o g r a p h 1 8 i n a p l a n e p a r a l l e l t o s u r f a c e 1 2. Assemb l y 62 i s h o r i z o n t a l l y movable by means o f a s l o t 68

l o n g i t u d i n a l l y d i s p o s e d i n l e g 3 2 , t h r o u g h w h i c h p a s s e s

a s h a f t which engages c u t t e r assembly 6 2 . Cutter assem

b l y 6 2 i s ?xed i n a p r e d e t e r m i n e d p o s i t i o n r e l a t i v e t o

l e g 3 2 by a c l a m p i n g arm 70 , w h i c h f r i c t i o n a l l y l o c k s

a s s e m b l y 6 2 i n ? x e d p o s i t i o n w i t h r e s p e c t t o l e g 3 2 .

E n g r a v i n g t o o l 6 0 h a s diamond t i p 6 1 on t h e l o w e r

e n d o f a s h a f t ‘ 6 3 s l i d a b l y p a s s i n g t h r o u g h c u t t e r a s s e m

1 5

20

25

30

65

4b l y 62 and h a s a hand knob 6 4 mounted on t h e u p p e r

e n d o f s h a f t 6 3 . S u r r o u n d i n g s h a f t 6 3 - and d i s p o s e d b e

tween knob 64 and t h e upper s u r f a c e o f a s s e m b l y 62

i s a c o i l s p r i n g 66 which u r g e s t o o l 6 0 i n an upward

p o s i t i o n . E x e r t i n g a downward f o r c e on knob 64 p o s i

t i o n s diamond t i p 6 1 o f e n g r a v i n g t o o l 6 0 ‘ i n i t s l o w e r ,

o p e r a t i v e p o s i t i o n .The a r t i c l e t o be Worked upon i n d i c a t e d a t 72 i s

c l a m p e d i n p o s i t i o n on a v i s e a s s e m b l y 7 4 , w h i c h i s

movable on and i n a p l a n e p a r a l l e l t o b a s e 12 t o w a r d s

and away from g u i d e l e t t e r a s s e m b l y 50 and t r a n s v e r s e

t o t h e l o n g i t u d i n a l a x i s o f t o o l 6 0 . V i s e a s s e m b l y 7 4 ,

s e e n b e s t i n FIGS. 2 and 7 , i n c l u d e s s l i d i n g member76 movable on body 1 0 t o w a r d s and away from g u i d e

l e t t e r a s s e m b l y 5 0 on b e a r i n g e d g e s 7 8 on o p p o s i t e s i d e s

o f b a s e 1 2 . Member 76 h a s c o o p e r a t i n g d o v e t a i l b e a r

i n g e l e m e n t s 80 and 8 1 , which a s s e e n i n FIGS. 1 and

7 , a r e mounted on o p p o s i t e e n d s o f member 76 and

w h i c h c o o p e r a t e w i t h b e v e l e d e d g e s 7 8 . B e a r i n g e l e m e n t80 i s a d j u s t a b l y mounted t o member 76 by f a s t e n e r s

83 which a l l o w s b e a r i n g 8 0 t o move s l i g h t l y w i t h r es p e c t t o member 76 . Member 76 i s ? x e d l y p o s i t i o n e d

on body 1 0 w i t h r e s p e c t t o e n g r a v i n g t o o l 6 0 by t i g h t e n

i n g t h r e a d e d l o c k i n g member 8 2 , w h i c h f o r c e s b e a r i n g

8 0 t o e n g a g e c o r r e s p o n d i n g e d g e 7 8 o f b a s e 1 0 and l o c k s

member 7 6 i n p o s i t i o n w i t h r e s p e c t t o s u r f a c e 1 2 . Toi n s u r e a c c u r a t e e n g r a v i n g , member 76 must m a i n t a i n i t s

d i m e n s i o n a l s t a b i l i t y d u r i n g o p e r a t i o n o f t h e d e v i c e . Top r e v e n t d e ? e c t i o n o f member 76 d u r i n g u s e , b a r s 77

e x t e n d t h e l e n g t h o f member 7 6 , a s s e e n b e s t i n FIGS.

3 and 5 , t o p r o v i d e r i g i d i t y . B a r s 7 7 may b e a t t a c h e d

by b o l t s , a s s h o w n , o r made i n t e g r a l w i t h member 7 6 .

S l i d i n g member 76 s u p p o r t s a c a r r i a g e 8 4 which i s

s l i d a b l y movable on member 76 p a r a l l e l t o g u i d e l e t t e ra s s e m b l y 5 0. C a r r i a g e 8 4 h a s a b a s e p l a t e 85 w i t h a

b e v e l e d s l i d i n g e d g e 8 6 , a s s e e n b e s t i n FIGS. 3 and 5 ,which c o o p e r a t i v e l y m a t e s w i t h a l o n g i t u d i n a l b e v e l e d

e d g e a l o n g member 6 » . The o p p o s i t e e d g e o f b a s e p l a t e

85 i s g e n e r a l l y U-shaped which s l i d a b l y r e c e i v e s a co

o p e r a t i n g l o n g i t u d i n a l e d g e o f member 7 6 a n d i s s e l e c t i v el y c l a m p e d i n ? x e d p o s i t i o n w i t h r e s p e c t t o member 7 6

by means o f a t h r e a d e d l o c k i n g member 8 8 . T i g h t e n i n g

member as f o r c e s a s t r i p 8 9 a g a i n s t a b e a r i n g s u r f a c e

on member 7 6 , s o t h a t t h e b e v e l e d e d g e 86 b e a r s a g a i n s t

i t s c o o p e r a t i n g b e v e l e d e d g e o f a d j u s t a b l e member 7 6 ,a n d s o i s l o c k e d i n p o s i t i o n . S t r i p 8 9 a p p l i e s t h e l o c k i n g

f o r c e f r o m - member 88 over a wide a r e a , thereby a v o i d s

s t r e s s c o n c e n t r a t i o n on member 7 6 . As seen b e s t i n FIG.

2 , two s c r e w l o c k e l e m e n t s 88 a r e u s e d t o ? x e d l y p o s i

t i o n c a r r i a g e 84 on member 76 t o i n s u r e a x i a l a l i g n m e n t .

H o w e v e r , i f d e s i r e d , a s i n g l e c e n t r a l l y d i s p o s e d s c r e wl o c k member 8 8 c o u l d b e u s e d .

F i x e d l y p o s i t i o n e d on o n e s i d e o f b a s e p l a t e 85 i s an

i n d e x p o i n t e r 9 0 shown mounted by s c r e w s , s o t h a t whenc a r r i a g e 8 4 i s m o v e d , p o i n t e r 9 0 moves a l o n g t h e t o p

o f member 7 6 . P o i n t e r 90 c o o p e r a t e s w i t h an i n d e x s c a l e

92 p o s i t i o n e d on t h e upper s u r f a c e o f member 7 6 . S i m i

l a r l y , member 7 6 h a s a p o i n t e r 9 4 c o o p e r a t i n g w i t h a

s c a l e 9 6 on base 1 2 . P o s i t i o n e d on support arm 23 i s a

s c a l e 97 which c o o p e r a t e s w i t h a p o i n t e r 98 on l e g 2 4 .

A l s o , l e g 32 h a s a s c a l e 99 which c o o p e r a t e s w i t h a

p o i n t e r o r marker 1 0 1 on c u t t e r a s s e m b l y 6 2 . S c a l e s 9 2 ,

9 6 , 9 7 and 9 9 a r e c o o p e r a t i v e l y a r r a n g e d s o t h a t e n g r a v

i n g t i p 6 1 i s q u i c k l y c e n t e r e d w i t h r e s p e c t t o v i s e a s s e m b l y7 4 , w h a t e v e r r a t i o o f s i z e o f e n g r a v e d l e t t e r i n g t o s i z e

o f t y p e on t y p e bar 42 i s u s e d , i n a manner d i s c l o s e dh e r e i n a f t e r .

F i x e d l y mounted on b a s e p l a t e 8 5 o f c a r r i a g e 84 i s

a s w i v e l b a s e p l a t e 1 0 0 h a v i n g a s e r i e s o f o p e n i n g s 102

s p a c e d a p r e d e t e r m i n e d a r c d i s t a n c e a p a r t about i t s

p e r i p h e r y . W h i l e h o l e s 1 0 2 c a n b e s p a c e d a t a n y a n g u l a r

d i s t a n c e a p a r t , 4 5 ° h a s b e e n f o u n d t o p r o v i d e a d e q u a t e

? e x i b i l i t y . H o l e s 1 0 2 a r e p o s i t i o n e d a t a p r e d e t e r m i n e d

r a d i u s . R o t a t a b l y mounted on s w i v e l b a s e p l a t e 1 0 0 a b o u t

a s h a f t 1 1 0 6 i s a work h o l d e r 1 0 4 h a v i n g u p s t a n d i n g a r m s

8/22/2019 Us 3570129


3 , 5 7 , 1 2 9

1 0 5 a t o p p o s i t e e n d s . S h a f t v I 1 0 6 e x t e n d s r o t a t a b l y t h r o u g h

t h e c e n t e r o f b a s e p l a t e 8 5 a n d s w i v e l b a s e p l a t e 1 0 0

and e n g a g e s work h o l d e r 1 0 4 , a s s e e n b e s t i n FIG. 5 .

S h a f t ‘ 1 0 6 i s r e t a i n e d i n ? x e d p o s i t i o n w i t h r e s p e c t t o

p l a t e 8 5 , a n d s w i v e l b a s e p l a t e 1 0 0 b y means o f t h r u s t

w a s h e r 1 0 8 and l o c k p r o n g ‘ 1 1 0 . P i v o t a l l y mounted onwork h o l d e r 104 about a s t u d 1 12 i s a cam p l a t e 1 1 4 . As

s e e n b e s t i n FIG. 6 , cam p l a t e I 1 1 4 ‘ h a s a p a i r o f gen

e r a l l y a r c u a t e o p e n i n g s 1 1 6 f a c i n g e a c h o t h e r a n d d i sp o s e d o f f s e t w i t h r e s p e c t t o s t u d 1 1 2 . A d v a n t a g e o u s l y ,

o p e n i n g s 116 a r e e q u a l and o p p o s i t e s o a s t o o b t a i n e q u a l

movement, a s d i s c u s s e d b e l o w . Cam 1 14 has a handle

1 1 8 e x t e n d i n g r a d i a l l y o u t w a r d l y , and w h i c h h a s a l o o k

i n g knob 1 2 0 t h r e a d e d l y mounted on i t s o u t e r e n d . Asb e s t s e e n i n FIG. 4 , a b o l t 122 p a s s e s through h a n d l e

1 . 1 8 a n d i s t h r e a d e d l y r e c e i v e d i n t o knob 1 2 0 . Mounted

a d j a c e n t t h e head o f b o l t 122 i s a l o c k washer 124 a d

v a n t a g e o u s l y made o f n y l o n . Work h o l d e r 104 h a s a

g e n e r a l l y e l o n g a t e d o p e n i n g - 1 2 6 t h e r e i n a l o n g a n a r e

t h a t knob 1 2 0 f o l l o w s f o r movement o f h a n d l e . 1 1 8 .

B o l t 1 2 2 p a s s e s t h r o u g h o p e n i n g 126 s o t h a t l o o k washer1 2 4 a b u t s t h e u n d e r - s u r f a c e o f work h o l d e r 1 0 4 . To l o c k

h a n d l e 1 1 1 8 o f cam 1 1 4 i n a n y p o s i t i o n a l o n g o p e n i n g

1 2 6 r e q u i r e s m e r e l y t i g h t e n i n g k n o b 1 2 0 , w h i c h u r g e s

w a s h e r 1 2 4 i n t o f r i c t i o n a l engagement w i t h h o l d e r 1 0 4 .

R o t a t i o n o f cam \ 1 1 4 i n t u r n d i s p l a c e s a r c u a t e o p e n i n g s

1 1 6 , s u c h a s i l l u s t r a t e d i n shadow l i n e s i n FIG. 6 .F i x e d l y p o s i t i o n e d b e t w e e n o p p o s i t e w a l l s 1 0 5 o f work

h o l d e r 1 0 4 a r e a p a i r o f s p a c e t a p a r t p a r a l l e l p i n s o r s h a f t s

1 2 8 . S l i d a b l y mounted on s a i d p i n s 1 2 8 a r e a p a i r o f j a w s

1 1 3 0 a n d 1 3 2 , r e s p e c t i v e l y , w h i c h a b u t s u b s t a n t i a l l y e q u i

d i s t a n t from w a l l s 1 0 5, a s s e e n b e s t i n FIG. 2 . Jaws 130

a n d 1 3 2 a r e u r g e d i n t o a b u t t i n g r e l a t i o n b y s p r i n g s 1 3 6

p o s i t i o n e d a b o u t p i n s 1 2 8 a n d i n t e r p o s e d b e t w e e n s a i d

j a w s and s a i d c o r r e s p o n d i n g w a l l 1 0 5 , s o a s t o n o r m a l l y

u r g e j a w s 1 3 0 and 132 t o g e t h e r . As s e e n b e s t i n FIGS.5 a n d 6 , e x t e n d i n g d o w n w a r d l y from t h e u n d e r s u r f a c e

o f jaw 1 3 0 i s a r o l l e r 1 3 8 d i m e n s i o n e d t o be s l i d a b l y

r e c e i v e d w i t h i n a c o r r e s p o n d i n g a r c u a t e o p e n i n g 1 1 6 i n

cam p l a t e 1 1 4 . S i m i l a r l y , e x t e n d i n g d o w n w a r d l y f r o mt h e u n d e r s u r f a c e o f jaw 132 i s a r o l l e r 140 dimensioned

t o ? t i n t h e o t h e r a r c u a t e o p e n i n g 116 o f cam 1 1 4 .

R o l l e r s 138 and 140 a r e r o t a t a b l e and r e d u c e f r i c t i o n

when c o a c t i n g w i t h t h e s u r f a c e s o f c o r r e s p o n d i n g cam

o p e n i n g s 1 1 6 . J a w s 1 3 0 and 1 3 2 h a v e a g e n e r a l l y f l a t

upper s u r f a c e , e a c h d i v i d e d by a t r a n s v e r s e g r o o v e . 1 4 2

and 1 4 4 , r e s p e c t i v e l y , w h i c h g r o o v e s a r e a d v a n t a g e o u s l y

a l i g n e d . J a w s 1 3 0 and 1 3 2 h a v e l i p s 1 4 6 a n d 1 4 8 , r e s p e c

t i v e l y , a l o n g t h e i r f o r w a r d e d g e s f a c i n g e a c h o t h e r . L i p s

146 and 1 4 8 form l e d g e s o r s h o u l d e r s t o s e c u r e l y h o l d

a r t i c l e s t o b e e n g r a v e d . Each o f t h e u p p e r s u r f a c e s o fj a w s 1 3 . 0 and 1 3 2 a r e p r o v i d e d w i t h a p l u r a l i t y o f h o l e s

1 5 0 , w h i c h e x t e n d downwardly f o r a s u b s t a n t i a l d e p t h

o f t h e i r r e s p e c t i v e j a w s . T h e s e h o l e s c o u l d e x t e n d t h r o u g h

t h e j a w s . Removably r e c e i v e d w i t h i n h o l e s 1 5 0 a r e a

p l u r a l i t y o f p i n s 1 5 2 f o r h o l d i n g o b j e c t s o f i r r e g u l a r s h a p e

f o r e n g r a v i n g . P i n s 1 5 2 a r e o f a s t e p p e d f r u s t o - c o n i c a l

c o n ? g u r a t i o n b e i n g t a p e r e d d o w n w a r d l y a n d i n w a r d l yt o w a r d s t h e j a w s . T h i s c o n ? g u r a t i o n o f t h e s e p i n s p r o

v i d e f o r v e r s a t i l i t y i n ? r m l y h o l d i n g v a r i o u s i r r e g u l a rs h a p e d a r t i c l e s t o b e e n g r a v e d . The s t e p p e d f r u s t o - c o n i c a l

c o n ? g u r a t i o n o f p i n s - 1 5 2 p r o v i d e a s h o u l d e r 1 5 4 w h i c h

c a n s u p p o r t and h o l d ?rmly t h e a r t i c l e s t o b e e n g r a v e d ,

i n a manner a s d e s c r i b e d h e r e i n a f t e r . I l l u s t r a t i v e l y , f o u r

s u c h p i n s a r e s h o w n .

Work h o l d e r 104 s r o t a t a b l e a b o u t i t s a x i s and may b el o c k e d i n a ? x e d p o s i t i o n a t p r e d e t e r m i n e d a n g l e s . Workh o l d e r 1 0 4 i s h e l d i n ?xed p o s i t i o n w i t h r e s p e c t t o s w i v e l

b a s e p l a t e 1 0 0 by means o f a v i s e l o c k 1 5 8 . V i s e l o c k 1 1 5 8

h a s an arm 1 6 0 , which i s p i v o t e d about an i n v e r t e d ,

g e n e r a l l y h a t - s h a p e d b r a c k e t 1 6 2 , a t t a c h e d t o workh o l d e r 1 0 4 by s c r e w s 1 6 3 t h r o u g h t h e e n d ? a n g e s .

Mounted t o t h e u n d e r s i d e o f arm 160 i s an L-shaped

b r a c k e t 1 6 3 h a v i n g o n e l e g e x t e n d i n g d o w n w a r d l y a d j a

c e n t h a t - s h a p e d b r a c k e t 1 6 2 a n d a b u t t i n g t h e b a s e o f

1 5

25

30

40

65

7 0

7 5

6work h o l d e r 1 0 4 , s o a s t o p i v o t t h e r e a b o u t when a downward f o r c e i s e x e r t e d on arm 1 6 0 . E x t e n d i n g t r a n s v e r s e l y

t h r o u g h t h e ? a t t e n e d b a s e o f b r a c k e t 162 i s a p i n 1 1 6 4 ,which i s s l i d a b l y p o s i t i o n e d i n a n o p e n i n g i n h o l d e r 1 0 4

and e x t e n d s t h r o u g h h o l d e r 1 0 4 t o be r e c e i v e d i n s e l e c t e d

o p e n i n g s 1 0 2 i n s w i v e l b a s e p l a t e 1 0 0 . P i n 1 1 6 4 h a s ano u t w a r d l y e x t e n d i n g ? a n g e 1 6 1 5 . M o u n t e d a b o u t p i n 1 6 4b e t w e e n ? a n g e 1 6 5 and t h e u n d e r s u r f a c e o f t h e b a s e o f

b r a c k e t 1 6 2 i s a s p r i n g 1 6 6 which u r g e s p i n 164 downw a r d l y . P i n 1 6 4 e x t e n d s u p w a r d l y t h r o u g h b r a c k e t

1 1 6 2 a n d i s t h r e a d e d . A knob 1 6 8 i s t h r e a d e d l y mountedon p i n 164 and can a d j u s t t h e t e n s i o n on s p r i n g

1 6 6 . To r o t a t e Work h o l d e r 1 0 4 , arm 1 6 0 o f p l u n g e r

a s s e m b l y 5 1 5 8 i s d e p r e s s e d a n d p i v o t s a b o u t o n e l e g

o f b r a c k e t 1 6 3 , t h e r e b y l i f t i n g knob 1 6 8 and o v e r —

c o m i n g t h e t e n s i o n o f s p r i n g 1 6 6 a n d l i f t i n g p i n

1 6 4 o u t o f o p e n i n g 1 0 2 i n s w i v e l p l a t e 1 0 0 . S i m u l t a

n e o u s l y , work h o l d e r 104 i s t h e n r o t a t e d a s e l e c t e d angu

l a r d i s t a n c e and arm 1 1 6 0 r e l e a s e d . Pin 164 i s urged

downwardly i n t o c o n t a c t w i t h p l a t e 1 0 0 b y a c t i o n o f

s p r i n g 1 6 6 u n t i l p i n ‘ 1 6 4 i s r e c e i v e d i n t o t h e s e l e c t e do p e n i n g 1 0 2 . P o s i t i o n i n g o f p i n 1 6 4 i n t o a n o p e n i n g 1 0 2 ,

l o o k s work h o l d e r 1 0 4 i n t o ? x e d p o s i t i o n w i t h r e s p e c t

t o b a s e s u r f a c e 1 2 and i n t u r n e n g r a v i n g t o o l ‘ 6 0 .

I n o r d e r t o o b t a i n c o r r e c t a l i g n m e n t o f e n g r a v i n g , i t

i s e s s e e n t i a l t h a t t h e o p e n i n g o f j a w s 1 3 0 and 1 3 2 b e

p a r a l l e l t o t y p e b a r 4 2 , s o a s t o h o l d work p i e c e 72

p a r a l l e l t o t h e t y p e b a r 4 2 . The o r d i n a r y t o l e r a n c e s i n

m a k i n g t h e v a r i o u s e l e m e n t s , 7 6 , 8 5 , 1 0 5 , e t c . , o f t e nw o u l d c o m b i n e t o p r o d u c e n o n - p a r a l l e l r e p r o d u c t i o n . Top r e v e n t t h i s , work h o l d e r 10 4 and s w i v e l p l a t e 1 0 0 a r e

i n i t i a l l y p i v o t a l l y mounted on b a s e p l a t e 8 5 . At l e a s t one

h o l e 172 i s p r o v i d e d i n h o l d e r . 1 0 4 . J a w s 1 3 0 and 132 a r e

p o s i t i o n e d s o a t t o be p a r a l l e l t o t y p e b a r 42 and a p i n

1 7 4 i s i n s e r t e d t h r o u g h h o l e 1 7 2 a n d l o c k s s w i v e l p l a t e

100 t o b a s e p l a t e 8 5 , a s b e s t s e e n i n FIG. 5 . P i n 1 7 4c a n b e p o s i t i o n e d i n o p e n i n g s d r i l l e d i n s w i v e l p l a t e 1 0 0

and b a s e p l a t e 8 5 , w h i l e s o a l i g n e d . As shown i n FIG. 2 ,

two h o l e s 172 i n h o l d e r 104 a r e p r o v i d e d . F u r t h e r , w h i l e

a p i n 1 7 4 i s s h o w n , s c r e w s , k e y s , and t h e l i k e c a n b eu s e d .

The e n g r a v i n g m a c h i n e d i s c l o s e d h e r e i n i s q u i c k l y a n de a s i l y s e t u p f o r o p e r a t i o n . The h e i g h t o f p a n t o g r a p h

a s s e m b l y 1 8 i s a d j u s t e d by t i g h t e n i n g o r l o o s e n i n g k n o b

2 2 w h i c h c l a m p s p l a t e s 2 1 a b o u t r o d s 1 6 . P a n t o g r a p h

a s s e m b l y 1 8 i s swung away from t h e b a s e 1 0 , and p i n s

1 5 2 a r e p o s i t i o n e d i n s e l e c t e d h o l e s 1 5 0 o f j a w s 1 3 0 and

1 3 2 , a s s e e n b e s t i n FIGS. 1 — 3 . The h o l e s 150 s e l e c t e d

depend on t h e s i z e and s h a p e o f t h e a r t i c l e t o b e e n g r a v e d .

O f t e n t i m e s t h e most f a v o r a b l e h o l e s f o r p o s i t i o n i n g t h e

p i n s a r e o b t a i n e d by t r i a l and e r r o r . Jaws 1 3 0 ‘ and 132a r e s e p a r a t e d by p i v o t i n g arm 1 1 8 ‘ o f cam 1 14 i n a c l o c k

w i s e d i r e c t i o n a s viewed i n FIGS. 2 and 6 . The c l o c k w i s e

r o t a t i o n o f cam 1 1 4 i n t u r n r o t a t e s o p e n i n g s 1 1 6 , which

u r g e r o l l e r s 1 3 8 a n d 1 4 0 o f j a w s 1 3 0 a n d 1 3 2 , r e s p e c t i v e l y ,

a p a r t , a s i n d i c a t e d i n shadow i n FIG. 6 and which f o r c e s

j a w s 1 3 0 and 1 3 2 t o s e p a r a t e and c o m p r e s s s p r i n g s 1 3 6 .

The a r t i c l e t o b e w o r k e d , 7 2 ‘ , i s shown p o s i t i o n e d b etween t h e c o a c t i n g p i n s 152 and r e s t i n g on t h e i r c o r r e

s p o n d i n g s h o u l d e r s 1 5 4 , knob 1 . 2 0 on arm 118 i s r e l e a s e d

c a u s i n g s p r i n g s 136 t o move j a w s 1 3 0 and 1 3 2 i n a c l o s i n g

d i r e c t i o n a n d u r g e t h e f r u s t o - c o n i c a l p o r t i o n s o f p i n s 1 5 2

t o s e c u r e l y e n g a g e and h o l d a r t i c l e 7 2 . S i n c e e a c h o f j a w s

130 and 132 moves an e q u a l d i s t a n c e , a r t i c l e 72 i s a u t o

m a t i c a l l y c e n t e r e d between arms 105 and on work h o l d e r

1 0 4 . For maximum h o l d i n g p r e s s u r e knob 1 2 0 i s u r g e di n a c o u n t e r c l o c k w i s e d i r e c t i o n f o r f o r c i n g t h e j a w s t o

g e t h e r and t h r e a d e d s o a s t o clamp arm 118 i n ?xed p o s i

t i o n w i t h r e s p e c t t o work h o l d e r 1 0 4 b y f o r c i n g l o c k

washer 124 i n t o t i g h t engagement w i t h t h e u n d e r - s u r f a c e

o f work h o l d e r 1 0 4 , a s s e e n b e s t i n FIG. 4 . The a r t i c l e

t o b e worked u p o n , 7 2 , i s p r e f e r a b l y c e n t e r e d on j a w s 1 3 0

a n d 1 3 2 ‘ . a n d c a r r i a g e 8 4 i s moved l o n g i t u d i n a l l y a l o n g

s l i d a b l e member 7 6 . u n t i l p o i n t e r 9 0 i s i n l i n e w i t h a

c e n t e r l i n e on s c a l e 9 2 . Once c a r r i a g e 84 h a s b e e n p o s i

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t i o n e d p r o p e r l y on member 7 6 , s c r e w l o c k e l e m e n t s 88

a r e t i g h t e n e d s o a s t o u r g e s t r i p 8 9 a g a i n s t t h e e d g e o f

member 7 6 , a s s e e n b e s t i n FIG. 3 , and t h e r e b y clamp

c a r r i a g e 8 4 a g a i n s t t h e b e v e l e d e d g e o f member 7 6 t op r e v e n t any r e l a t i v e movement. The s e l e c t e d t y p e b a r 4 2

i s p o s i t i o n e d i n g u i d e l e t t e r a s s e m b l y 5 0 a n d ? x e d l y h e l d

i n p o s i t i o n b y a c t u a t i n g h a n d l e 5 8 . To o b t a i n t h e d e s i r e d

r a t i o o f r e p r o d u c t i o n , t h e h e i g h t o f t h e t y p e on t y p e b a r42 i s d i v i d e d by t h e h e i g h t o f t h e d e s i r e d engraved l e t t e r .

P a n t o g r a p h 1 8 i s q u i c k l y a d j u s t e d t o o b t a i n t h e d e s i r e d

r a t i o b y l o o s e n i n g k n o b s 2 5 a n d 7 0 , a n d a l i g n i n g t h e d e

s i r e d r a t i o on s c a l e s 97 and 99 w i t h markers o r p o i n t e r s

9 8 and 1 0 1 , r e s p e c t i v e l y . The r e l a t i v e a r r a n g e m e n t b e

t w e e n p i v o t p o i n t 2 6 a n d e n g r a v i n g t i p 6 1 i s s u c h t h a t

p i v o t p o i n t 2 6 ‘ , e n g r a v i n g t i p 6 1 a n d s t y l u s p o i n t 4 0 whenc e n t e r e d a l o n g t y p e b a r 4 2 l i e a l o n g a s t r a i g h t l i n e . I n

o r d e r t o c e n t e r j a w s 1 3 0 and 1 3 2 w i t h e n g r a v i n g t i p 6 1 ,

member 7 6 i s moved s o t h a t p o i n t e r 94 i s a l i g n e d w i t h

t h e marking o f s c a l e 96 on s u r f a c e 1 2 c o r r e s p o n d i n g t o

t h e s e l e c t e d r a t i o o f s c a l e s 9 7 and 9 9 . E n g r a v i n g t o o l 6 0

i s swung b a c k i n t o p o s i t i o n . The a r t i c l e t o b e worked 7 2

i s c e n t e r e d b e n e a t h e n g r a v i n g t o o l 6 0 . Member 7 6 i s l o c k e d

i n p o s i t i o n b y t i g h t e n i n g l o c k i n g member 8 2 ? r m l y , w h i c hc l a m p s b e a r i n g 8 0 o f t h e a d j u s t a b l e member 7 6 a g a i n s t

b e v e l e d e d g e 7 8 o f b a s e 1 2 , and h o l d s a d j u s t a b l e member76 s e c u r e l y i n p l a c e . The l e t t e r s t o b e e n g r a v e d , s u c h a s

a name, i n i t i a l s , e t c . , a r e w r i t t e n on w r i t i n g s t r i p 5 6 , a l i g n

i n g e a c h l e t t e r w i t h e v e r y o t h e r l i n e , s t a r t i n g a t t h e f a r

l e f t . The l e t t e r i n g i n s t r i p 56 i s c e n t e r e d and t h e c o r r e

s p o n d i n g l e t t e r on t y p e b a r 4 2 i s t h e n p o s i t i o n e d o p p o s i t e

t h e ? r s t s k e t c h e d l e t t e r on w r i t i n g s t r i p 56 and t y p e b a r

4 2 i s l o c k e d i n p o s i t i o n . The s t y l u s g u i d e p o i n t 4 0 i s t h e n

p l a c e d i n t h e s e l e c t e d l e t t e r on b a r 42 and t r a c e d , w h i l e

s i m u lt a n e o u s ly l o w e r i n g e n g r a v i n g t o o l 6 0 i n t o c o n t a c t

w i t h a r t i c l e 72 by a downward f o r c e e x e r t e d on knob 6 4 .

The t y p e b a r 42 i s t h e n l o o s e n e d and moved t o p o s i t i o n

t h e c o r r e s p o n d i n g l e t t e r o p p o s i t e t h e n e x t l e t t e r t o b e e n

g r a v e d a n d t h e p r o c e s s r e p e a t e d . By p l a c i n g g u i d e p o i n t 4 0

i n t u r n i n e a c h o f t h e l e t t e r s s e l e c t e d t o be e n g r a v e d and

f o l l o w i n g t h e o u t l i n e t h e r e o f w i t h t h e s t y l u s , t h e c o r r e

s p o n d i n g l e t t e r s w i l l b e e n g r a v e d on t h e s u r f a c e o f t h e

a r t i c l e , p r e c i s e l y c e n t e r e d a n d i n t h e s e l e c t e d h e i g h t . I n

use t h e s e l e c t e d l e t t e r s on type bar 42 are moved i n t o

p o s i t i o n o p p o s i t e t h e l e t t e r s on w r i t i n g s t r i p 5 6 a n d t h e n

t h e t y p e b a r 4 2 c l a m p e d f o r e a c h t r a c i n g o p e r a t i o n .

To p r o d u c e n o n - l i n e a r e n g r a v i n g , a r t i c l e 7 2 i s r o t a t e d

w i t h r e s p e c t t o e n g r a v i n g t o o l 74 by d e p r e s s i n g arm 1 6 0

which removes p i n 164 from t h e o p e n i n g 1 0 2 i n s w i v e l

p l a t e 1 0 0 , i n w h i c h i t was p o s i t i o n e d , and r o t a t i n g work

h o l d e r 1 0 4 . By removing t h e p r e s s u r e on arm 1 6 0 , t h e

p i n i s u r g e d d o w n w a r d l y b y s p r i n g 1 6 6 o n t o p l a t e 1 0 0 a n dt h e work h o l d e r 1 0 4 i s a u t o m a t i c a l l y l o c k e d i n p o s i t i o n

when t h e n e x t o p e n i n g 1 0 2 i n p l a t e 1 0 0 b e c o m e s a l i g n e d

w i t h p i n 1 6 4 .

I f t h e a r t i c l e t o be worked 72 i s t h i n , a p i n 170 can

be p l a c e d i n t h e c e n t e r beneath t h e work. Pin 170 a s s e e n

i n FIG. 6 h a s a ? a t t o p w i t h o u t t h e s t e p p e d f r u s t o - c o n i c a l

c o n ? g u r a t i o n . F u r t h e r , i f d e s i r e d , a r t i c l e s ma y b e h e l d

between j a w s 130 and 1 3 2 , o r between t h e l i p s 1 4 6 i n t h e

same manner as described above.

To r e l e a s e a r t i c l e 72 , i t i s o n l y n e c e s s a r y t o u n t h r e a d

knob 120 and p i v o t cam arm 1 18 i n a c l o c k w i s e d i r e c t i o n ,

s o t h a t j a w s 1 3 0 ' and 132 s e p a r a t e and p i n s 1 5 2 a r e moved

away from g r i p p i n g e n g a g e m e n t w i t h a r t i c l e 72 , t h e r e b y

p e r m i t t i n g a r t i c l e 72 t o b e r e a d i l y a n d e a s i l y r e m o v e d .

Arm 118 i s r e l e a s e d and t h e j a w s 130 and 132 r e t u r n t oc l o s e d p o s i t i o n b y a c t i o n o f s p r i n g s 1 3 6 . W h i l e a r t i c l e7 2 w a s shown h a v i n g ? a t e d g e s , p i n s 1 5 2 ? r m l y h o l d r i n g s

a n d o d d - s h a p e d a r t i c l e s .I t w i l l b e s e e n from t h e f o r e g o i n g d e s c r i p t i o n t h a t

t h e j a w a s s e m b l y p o s i t i v e l y a n d u n i f o r m l y c e n t e r s t h e

a r t i c l e t o be worked w i t h i n work h o l d e r 1 0 4 , s o a s t o be

q u i c k l y a n d e a s i l y a l i g n e d w i t h r e s p e c t t o e n g r a v i n g t o o l

6 0 , e v e n when t h e s i z e t h e e n g r a v e d l e t t e r i n g i s c h a n g e d .

F u r t h e r , t h e v i s e a s s e m b l y i s c a p a b l e o f a c c o m m o d a t i n g

1 0

20

4 - 0

50

60

65

7 0

8v a r i o u s s i z e s and s h a p e s o f a r t i c l e s , and d u e t o i t s s i mp l i c i t y c a n b e r e a d i l y a n d e a s i l y o p e r a t e d . The l e t t e r i n gon t h e a r t i c l e t o b e worked s e x a c t l y c e n t e r e d and o f t h e

s e l e c t e d h e i g h t , and v a r i o u s t y p e s and s i z e s o f l e t t e r sf o r u s e i n t h e s t y l u s c a n b e e a s i l y and q u i c k l y p o s i t i o n e d

i n g u i d e l e t t e r a s s e m b l y 5 0 b e t w e e n l e t t e r g u i d e 5 4 andw r i t i n g s t r i p 5 6 .

I t i s obvious t h a t d i f f e r e n t s i z e l e t t e r s o r s t e n c i l s can be

u t i l i z e d by r e p l a c i n g t y p e b a r s 42 h a v i n g t h e v a r i o u s s t y l e s

and t y p e s o f l e t t e r s . The t y p e b a r s 42 a r e e a s i l y clamped

i n t o p o s i t i o n i n g u i d e l e t t e r a s s e m b l y 5 0 a n d u s e d a s d i sc u s s e d a b o v e . I f d e s i r e d , i n d i v i d u a l l e t t e r s c a n b e p o s i

t i o n e d i n g u i d e a s s e m b l y 5 0 i n p l a c e o f t y p e b a r 4 2 .

While one form o f cam has been i l l u s t r a t i v e l y shown,

o t h e r s h a p e d cams can b e u s e d . S i m i l a r l y , w h i l e s p r i n g s

were shown t o p r o v i d e t h e b i a s i n g f o r c e on j a w s 1 3 0 and

1 3 2 , o t h e r r e s i l i e n t s t r u c t u r e s o r m a t e r i a l s ma y b e u s e d .

F u r t h e r , t o p r o v i d e c e n t e r i n g f o r t h e o b j e c t t o b e e n

g r a v e d , b o t h j a w s w e r e moved e q u a l d i s t a n c e a p a r t a n d

t o g e t h e r , u n e q u a l j a w movement ma y b e o b t a i n e d , i f

d e s i r e d , by v a r y i n g t h e c u r v a t u r e o f t h e cam s u r f a c e .While a p r e f e r r e d embodiment o f t h i s i n v e n t i o n h a s

b e e n s h o w n , i t i s u n d e r s t o o d t h a t v a r i o u s c h a n g e s i n t h e

s i z e , s h a p e and a r r a n g e m e n t o f p a r t s may b e r e s o r t e d t o

w i t h o u t d e p a r t i n g from t h e s p i r i t o f t h e i n v e n t i o n a n d t h e

s c o p e o f t h e appended c l a i m s .

What c l a i m i s :1 . An e n g r a v i n g m a c h i n e f o r r e p r o d u c i n g i n d i c i a a n d

h a v i n g a p a n t o g r a p h l i n k a g e w i t h a s t y l u s f o r f o l l o w i n g

s a i d i n d i c i a , c o m p r i s i n g means f o r r e p r o d u c i n g s a i d i n

d i c i a , a work h o l d e r h a v i n g a p a i r o f j a w s movable t o

wards and away from each o t h e r , means a s s o c i a t e d w i t h

e a c h o f s a i d j a w s f o r c o n t i n u o u s l y a n d y i e l d i n g l y u r g i n g

s a i d j a w s i n t o c l a m p i n g p o s i t i o n , s a i d w o r k h o l d e r i nc l u d i n g a b a s e , a n u p s t a n d i n g s u p p o r t a t a n o p p o s i t e p a i r

o f e n d s o f t h e b a s e , a p i n e x t e n d i n g a c r o s s s a i d b a s e andb e t w e e n s a i d s u p p o r t s , s a i d j a w s b e i n g s l i d a b l y m o u n t e don s a i d p i n , and means a d a p t e d t o s e p a r a t e and h o l d

open s a i d j a w s f o r r e c e i v i n g t h e a r t i c l e t o b e e n g r a v e d ,

s a i d means i n c l u d i n g a cam p i v o t a l l y mounted on s a i d

b a s e and below s a i d j a w s , s a i d cam b e i n g o p e r a t i v e l y con

n e c t e d t o s a i d j a w s t o e q u a l l y r e c i p r o c a t e s a i d j a w s f o r

r e c e i v i n g a n d h o l d i n g s a i d a r t i c l e t o b e e n g r a v e d .

2 . An n g r a v i n g machine a s i n c l a i m 1 f u r t h e r i n c l u d

i n g m e a n s f o r s e l e c t i v e l y l o c k i n g s a i d j a w s i n s p a c e d a p a r t

p o s i t i o n s .3 . An e n g r a v i n g m a c h i n e a c c o r d i n g t o c l a i m 1 , w h e r e i n

s a i d r e p r o d u c i n g means i n c l u d e s a n e n g r a v i n g t o o l , and

f u r t h e r i n c l u d i n g means moving s a i d work h o l d e r i n a

p l a n e t r a n s v e r s e t o t h e l o n g i t u d i n a l a x i s o f s a i d e n g r a v i n g

t o o l and l o c k i n g means h o l d i n g s a i d work h o l d e r i n s el e c t e d p o s i t i o n w i t h r e s p e c t t o s a i d e n g r a v i n g t o o l .

4 . An n g r a v i n g machine a c c o r d i n g t o c l a i m 1 , : w h e r e

i n s a i d y i e l d i n g j a w c l a m p i n g means i s d i s p o s e d b e t w e e ne a c h j a w a n d i t s r e s p e c t i v e s u p p o r t f o r c o n t i n u o u s l y u r g

i n g s a i d j a w s t o g e t h e r a n d f u r t h e r i n c l u d i n g means f o r

l o c k i n g s a i d cam i n s e l e c t e d j a w o p e n p o s i t i o n .

5 . An e n g r a v i n g m a c h i n e a c c o r d i n g t o c l a i m 1 , ‘ w h e r e i n

s a i d y i e l d i n g j a w c l a m p i n g means a r e s p r i n g s mounted

a b o u t s a i d p i n b e t w e e n e a c h s u p p o r t a n d i t s c o r r e s p o n di n g j a w , s a i d cam h a s a n arm r a d i a l l y e x t e n d i n g o u t w a r d l y

‘ b e y o n d s a i d j a w s and s a i d b a s e h a s a n e l o n g a t e d o p e n i n g

along t h e a r c o f movement o f s a i d cam arm, and f u r t h e r

i n c l u d i n g means f o r l o c k i n g s a i d arm a t a s e l e c t e d p o s i

t i o n a l o n g s a i d b a s e o p e n i n g .

6 . An e n g r a v i n g m a c h i n e a c c o r d i n g t o c l a i m 1 , w h e r ei n s a i d cam i s c o u p l e d t o s a i d j a w s t o r e c i p r o c a t e s a i d

j a w s an e q u a l d i s t a n c e a b o u t t h e i r l i n e o f c o n t a c t and

f u r t h e r i n c l u d i n g i n d e x i n g means f o r r o t a t i n g s a i d work

h o l d e r a b o u t t h e c e n t e r o f s a i d l i n e o f c o n t a c t . o f s a i d j a w s

a s e l e c t e d a r e d i s t a n c e and means f o r l o c k i n g s a i d work

h o l d e r i n s a i d p o s i t i o n w i t h r e s p e c t t o s a i d r e p r o d u c i n g

means.

7 . An e n g r a v i n g m a c h i n e f o r r e p r o d u c i n g i n d i c i a a n d

h a v i n g a p a n t o g r a p h l i n k a g e w i t h a s t y l u s f o r f o l l o w i n g

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s a i d i n d i c i a , c o m p r i s i n g m e a n s f o r r e p r o d u c i n g s a i d i nd i c i a , a work h o l d e r h a v i n g a p a i r o f j a w s movable t o

wards and away from e a c h o t h e r , means a s s o c i a t e d w i t h


s a i d j a w s i n t o c l a m p i n g p o s i t i o n , a n d m e a n s a d a p t e d t os e p a r a t e a n d h o l d o p e n s a i d j a w s f o r r e c e i v i n g t h e a r t i c l et o b e e n g r a v e d i n c l u d i n g a cam c o u p l e d t o e a c h o f s a i d

j a w s , and means r e c i p r o c a t i n g s a i d j a w s i n r e s p o n s e t o

movement o f s a i d c a m , e a c h o f s a i d j a w s h a v i n g a p l u

r a l i t y o f o p e n i n g s t r a n s v e r s e t o t h e u p p e r s u r f a c e o f s a i d

j a w s , a p l u r a l i t y o f s t e p p e d f r u s t o - c o n i c a l p i n s r e m o v a b l y

r e c e i v a b l e i n s e l e c t e d o n e s o f s a i d o p e n i n g s , s a i d p i n s hav

i n g a r e d u c e d d i a m e t e r e n d p o r t i o n e x t e n d i n g c o n c e n t r i

c a l l y o u t w a r d l y a w a y f r o m s a i d j a w s , s a i d e n d p o r t i o n s

b e i n g t a p e r e d i n w a r d l y a n d t o w a r d s s a i d j a w s , t h e i n t e rs e c t i o n o f s a i d e n d p o r t i o n w i t h i t s c o r r e s p o n d i n g p i n

f o r m i n g a s t e p p e d a n g u l a r s h o u l d e r f o r l o c k i n g t h e a r t i c l et o b e e n g r a v e d i n p o s i t i o n .

8 . An e n g r a v i n g m a c h i n e f o r r e p r o d u c i n g i n d i c i a a n d

h a v i n g a p a n t o g r a p h l i n k a g e w i t h a s t y l u s f o r f o l l o w i n gs a i d i n d i c i a , c o m p r i s i n g m e a n s f o r r e p r o d u c i n g s a i d i nd i c i a , a work h o l d e r h a v i n g a p a i r o f j a w s movable t o

wards and away from each o t h e r , means a s s o c i a t e d w i t h


s a i d j a r w s i n t o c l a m p i n g p o s i t i o n , a n d means a d a p t e d t os e p a r a t e a n d h o l d o p e n s a i d j a w s f o r r e c e i v i n g t h e a r t i c l et o b e e n g r a v e d , s a i d l a s t mentioned means i n c l u d i n g a

cam c o u p l e d t o e a c h o f s a i d j a w s , and f u r t h er i n c l u d i n g

means r e c i p r o c a t i n g s a i d j a w s a n e q u a l d i s t a n c e a b o u t

t h e i r l i n e o f c o n t a c t i n r e s p o n s e t o r o t a t i o n o f s a i d cam,

i n d e x i n g means f o r r o t a t i n g s a i d work h o l d e r a b o u t t h e

c e n t e r o f s a i d l i n e o f c o n t a c t o f s a i d j a w s a s e l e c t e d a r e

d i s t a n c e , means f o r l o c k i n g s a i d work h o l d e r i n s a i d

p o s i t i o n w i t h r e s p e c t t o s a i d r e p r o d u c i n g m e a n s , a c a r

r i a g e o n w h i c h s a i d ‘ w o r k h o l d e r i s r o t a t a b l y s u p p o r t e d ,means r o t a t a b l y c o n n e c t i n g s a i d work h o l d e r on s a i d c a r

r i a g e , a p i n t r a n s v e r s e l y s u p p o r t e d i n s a i d work h o l d e r

a n d u r g e d i n t o c o n t a c t w i t h s a i d c a r r i a g e , s a i d c a r r i a g e

c o n t a i n i n g a s e r i e s o f r e c e s s e s f o r c o o p e r a t i v e l y r e c e i v i ng

s a i d p i n a l o n g t h e c i r c u m f e r e n c e o f movement o f t h e p i n

d u r i n g r o t a t i o n o f s a i d work h o l d e r , means f o r d i s e n g a g

i n g s a i d p i n from i t s m a t i n g r e c e s s , s o t h a t s a i d work

h o l d e r may b e r o t a t e d , s a i d work h o l d e r and s a i d c a r

r i a g e b e i n g l o c k e d i n ? x e d p o s i t i o n d u r i n g e n g a g e m e n to f s a i d p i n i n one o f s a i d r e c e s s e s .

10

20

25

30

40

1 09 . An e n g r a v i n g m a c h i n e f o r r e p r o d u c i n g i n d i c i a a n d

h a v i n g a p a n t o g r a p h l i n k a g e ‘ w i t h a s t y l u s f o r f o l l o w i n g

s a i d i n d i c i a , c o m p r i s i n g m e a n s f o r r e p r o d u c i n g s a i d i nd i c i a , a work h o l d e r h a v i n g a p a i r o f j a w s movable t o

w a r d s and away from e a c h o t h e r , means a s s o c i a t e d w i t he a c h o f s a i d j a w s f o r c o n t i n u o u s l y a n d y i e l d i n g l y u r g i n g

s a i d j a w s i n t o c l a m p i n g p o s i t i o n , a n d means a d a p t e d t o

s e p a r a t e and h o l d o p e n s a i d j a w s f o r r e c e i v i n g t h e a r t i c l et o b e e n g r a v e d , s a i d l a s t mentioned means i n c l u d i n g a

cam c o u p l e d t o e a c h o f s a i d j a w s , s a i d cam b e i n g r o t a t

a b l y mounted on s a i d work h o l d e r b e l o w s a i d j a w s a n d ‘

h a v i n g a p a i r o f e l o n g a t e d c u r v e d o p e n i n g s on o p p o s i t e

s i d e s o f s a i d mounting, an arm a t t a c h e d t o s a i d cam and

e x t e n d i n g o u t w a r d l y b e y o n d s a i d j a w s , s a i d w o r k h o l d e r

h a v i n g a n e l o n g a t e d o p e n i n g a l o n g t h e a r c o f movemento f s a i d cam arm, means l o c k i n g s a i d arm a t s e l e c t e d p o s i

t i o n s a l o n g s a i d work h o l d e r o p e n i n g , a n d means r e c i p r o

c a t i n g s a i d j a w s i n r e s p o n s e t o r o t a t i o n o f s a i d c a m , i n

c l u d i n g a f o l l o w e r c o u p l e d t o e a c h o f s a i d j a w s and e a c h

s l i d a b l y r e c e i v e d w i t h i n a c o r r e s p o n d i n g cam o p e n i n g , s ot h a t s a i d f o l l o w e r s move i n r e s p o n s e t o r o t a t i o n o f s a i d

cam a n d t h e r e b y r e c i p r o c a t e s a i d j a w s .

1 0 . An n g r a v i n g m a c h i n e a c c o r d i n g t o c l a i m 9 , ‘ w h e r e

i n s a i d l o c k i n g means i n c l u d e s a t h r e a d e d p o s t on s a i d

cam arm and e x t e n d i n g t h r o u g h t h e work h o l d e r open

i n g , and a h a n d l e t h r e a d e d l y r e c e i v e d on s a i d p o s t and

a d a p t e d t o e n g a g e t h e work h o l d e r when t i g h t e n e d .

R e f e r e n c e s C i t e d

UNITED STATES PATENTS

540,649 ‘6/1895 Eastwood _________ _ 279—1 4

2,724,896 11/1955 Mich ___________ _ 33——25(A)

2,729,892 1/1956 Gruettner _______ _ 33—25(A)

2,749,617 6 / 1 956 Gruettner _______ __ 33—-25(A)

3, 107,5 75 10/1963 Paul _____________ _ 269-—254

3,295,211 1 / 1 9 6 7 Nisenson ________ _ 33--23-(K)

1,666,634 4/1928 Thomson ___________ _ 33-26

2,644,241 7/1953 Frisk _____________ _ 33—191

FOREIGN PA TEN TS

21 0 , 1 1 2 1 / 1 9 24 Great Britain ______ __ 33-191

HARRY . HAROIAN, P r i m a r y E x a m i n e r

us 3570129

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