diasassembly a curta

7/30/2019 Diasassembly a Curta

1/24

Start by removing the two screws on the bottom of the Curta The plate will then lift out of the bottom. Be careful because the

side can easily slide off.

Here you can see the home position mechanism and the anti-

reverse cam. Many of the Curtas also have their serial number on

the bottom plate too.

Now holding the top slide the side off the bottom.
http://www.vcalc.net/disassy/tn_Img_2981-3097.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3098.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3096.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3095.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3097.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3098.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3096.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3095.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3097.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3098.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3096.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3095.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3097.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3098.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3096.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3095.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3097.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3098.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3096.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3095.jpg


2/24

Now the lower mechanism of the Curta can be observed.

A view from the other side. Once the pin is out the crank pulls off. Pull it up and turn

backwards. It exposes the shaft and two circ lip. Remove only the

lower, larger one.

The crank knob and be removed from the crank by removing the

screw.

Be careful, I almost got shot in the eye the first time I removed the

top. Cover the top with your hand. The brass ring secures the

carriage pressure spring under it.
http://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3099.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3100-3121.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3102.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3101-3110.jpg


3/24

Here's the Carriage pressure spring. There's a brass washer under

the spring.

Here are all of the top inner parts.

Lift the top off. Remove the ball rearing that's in the side on the

lower part of the central shaft. This ball is used to prevent the top

from being lifted after the crank has started turning. Now you can

see the transmission shafts and the ten carry levers. Now remove

the three screws holding the upper side on.

Now you can see the entire ten carry mechanism. Be careful not to

catch and bend the tiny ten carry springs. The tens carry springs

are so small you cannot see them in this photo.
http://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3106.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3105.jpghttp://www.vcalc.net/disassy/tn_Img_2981-3104.jpg


4/24

Now we're going to remove the setting shafts. Start by partially

loosening the two screws on the left plate.

Slide the setting shaft plate off. Leave the screws in place.

Here's the setting shaft plate. Now gently push up on the left most setting shaft. The setting

shaft bearing will protrude out the bottom. Grab it with a pair of

tweezers. Now remove the remaining three bearings.
http://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpghttp://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpghttp://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpghttp://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpghttp://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpghttp://www.vcalc.net/disassy/tn_Img_2984.jpghttp://www.vcalc.net/disassy/tn_Img_2983a-3047.jpghttp://www.vcalc.net/disassy/tn_Img_2983.jpghttp://www.vcalc.net/disassy/tn_Img_2982.jpg


5/24

Now the setting shafts can be easily removed. Here are some views of the setting shaft and it's bearing. DO NOT

SLIDE the setting shaft lever off of the shaft. It contains a tiny

spring and a ball bearing. I'm guessing that it would be hard as hell

to get it back together.

While I'm at it, DO NOT remove the decimal markers on the top

and bottom of the Curta. They, too, contain a tiny spring and ball

bearing. It must have taken me 30 minutes to wrangle the parts

back into place after I removed a decimal marker!"

The screw in the knob follows the spiral groove in the setting

shaft. The tip of the screw is precisely oriented to fit the angular

groove...don't turn the screw!
http://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3039.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3038.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3037.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3036.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3035.jpghttp://www.vcalc.net/disassy/tn_Img_2985.jpg


6/24

Now you can begin to see the inner workings of the Curta more

clearly.

Now we're going to up the difficulty another notch. Don't try this

unless you have exceptional mechanical dexterity. We're going to

remove all of the ten carry shafts. Remove the screw to the left of

the ten carry assembly. Then gently pull the entire assemblystraight out.

This is easy... getting it back in on re-assembly is the hard part!
http://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3092.jpghttp://www.vcalc.net/disassy/tn_Img_2988.jpghttp://www.vcalc.net/disassy/tn_Img_2987.jpghttp://www.vcalc.net/disassy/tn_Img_2986a.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3057.jpghttp://www.vcalc.net/disassy/tn_Img_2986-3040.jpg


7/24

It's bare!

Here are the ten carry shafts. There are two types. The one on the

left works with the main accumulator. The right on works with the

turns counter accumulator.
http://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3027.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3026.jpghttp://www.vcalc.net/disassy/tn_Img_2990.jpghttp://www.vcalc.net/disassy/tn_Img_2989.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3094.jpghttp://www.vcalc.net/disassy/tn_Img_2988a-3093.jpg


8/24

Here are all of the tens carry assembly parts. From left to right, the

ten carry lever bearing block, the ten carry spring, the ten carry

screw, and the ten carry lever.

Now we're going to remove the Reversing lever.
http://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpghttp://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpghttp://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpghttp://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpghttp://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpghttp://www.vcalc.net/disassy/tn_Img_2992.jpghttp://www.vcalc.net/disassy/tn_Img_2991a.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3118.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3117.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3116.jpghttp://www.vcalc.net/disassy/tn_Img_2991-3028.jpg


9/24

Remove the brass nut holding the top of the Reversing lever shaft. Slide the Reversing shaft down until the slotted portion of the

shaft slide through the bottom base.

And it's out!

The Reversing lever has a short black top spacer and longer lower

spacer.
http://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3044.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3043.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3042.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3041.jpghttp://www.vcalc.net/disassy/tn_Img_2994.jpghttp://www.vcalc.net/disassy/tn_Img_2993.jpg


10/24

As before, don't remove the Reversing lever knob from the shaft.

It containing a tiny spring and ball bearing just like the Setting

shafts.

Now remove the three screws that hold the Locking ring onto the

top of the Curta. Keep the Curta upright so the transmission shafts

do not fall out.
http://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3112.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3111.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3088.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046-3087.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3046.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3045.jpg


11/24

Here's the top Locking ring and it's three screws.

Now we're going to up the difficulty lever one more notch. Don't

proceed unless you're really good with precision tweezers and

tiny-tiny c-clips! 5 of the 17 shafts have a total of 9 c-clips securing

some of the transmission gears in place. Remove all of these c-clips.

Push the first shaft up and slide the transmission gears off of the

bottom.
http://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpghttp://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpghttp://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpghttp://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpghttp://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpghttp://www.vcalc.net/disassy/tn_Img_2996a.jpghttp://www.vcalc.net/disassy/tn_Img_2996-2995.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115-3056.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3115.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3114.jpghttp://www.vcalc.net/disassy/tn_Img_2995-3113.jpg


12/24

Here's the top of the transmission shaft.

Here's the transmission shaft and two gears.

Notice the shape of the left gear? That's the Curta logo on the

bottom of the machine!
http://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3030.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3029.jpghttp://www.vcalc.net/disassy/tn_Img_2997a.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3055.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3054.jpghttp://www.vcalc.net/disassy/tn_Img_2997-3053.jpg


13/24

Here's a single and double gear with a tens carry lever bearing

block and spring in the background

Here a single and triple gear. There's only 1 triple gear shaft in the

Curta and it's in the first position of the turns counter.

The gear on the bottom is used to prevent the shaft from turning

in conjunction with the tens bell (see below).

Now it's really bare! The Step drum can new be easily seen. The big section is used with

the main accumulator.
http://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpghttp://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpghttp://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpghttp://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpghttp://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpghttp://www.vcalc.net/disassy/tn_Img_2999.jpghttp://www.vcalc.net/disassy/tn_Img_2998a.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3034.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3033.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3032.jpghttp://www.vcalc.net/disassy/tn_Img_2998-3031.jpg


14/24

The small section (on the other side) is used with the turns

counter accumulator.

The brass cam at the bottom of the shaft is an interlock that is

used to prevent the turns handle from being lifted or pushed

down once a turn is initiated.
http://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpghttp://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpghttp://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpghttp://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpghttp://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpghttp://www.vcalc.net/disassy/tn_Img_3005.jpghttp://www.vcalc.net/disassy/tn_Img_3004.jpghttp://www.vcalc.net/disassy/tn_Img_3003.jpghttp://www.vcalc.net/disassy/tn_Img_3002.jpghttp://www.vcalc.net/disassy/tn_Img_3001.jpghttp://www.vcalc.net/disassy/tn_Img_3000.jpg


15/24

Now remove the three brass nuts on the bottom of the Curta. This

will allow the top plate to be separated from the bottom plate.

Here's the bottom.
http://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3091.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3090.jpghttp://www.vcalc.net/disassy/tn_Img_3009-3089.jpghttp://www.vcalc.net/disassy/tn_Img_3008.jpghttp://www.vcalc.net/disassy/tn_Img_3007.jpghttp://www.vcalc.net/disassy/tn_Img_3006.jpg


16/24

Here's the top

The tens bell can be freed up by removing the small c-clip on the

top of the main shaft housing.

This is the tens bell. It is used to control the logic of the tens carry

mechanism.

The bottom level is used to clear the carry levers to a "no carry" or

up position on the main accumulator. The raised portion of this

ring is the point where the tens carry levers get pushed up. The

third level is just like the bottom level except it is used with theturns counter accumulator.
http://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpghttp://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpghttp://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpghttp://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpghttp://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpghttp://www.vcalc.net/disassy/tn_Img_3015.jpghttp://www.vcalc.net/disassy/tn_Img_3014a.jpghttp://www.vcalc.net/disassy/tn_Img_3014-3012.jpghttp://www.vcalc.net/disassy/tn_Img_3011.jpghttp://www.vcalc.net/disassy/tn_Img_3010.jpghttp://www.vcalc.net/disassy/tn_Img_3009a.jpg


17/24

The next level up is used to prevent the transmission shafts from

turning except when the mechanism is in a position that would be

appropriate for motion to occur. The forth level up is like this one

except it is used to lock the turns carry transmission shafts when

motion is not warranted.

notice the notch on the bottom level of the tens bell. This is used

to input a count on any shaft where the ten carry position is set.

The two pins near the center are used to prevent the top carriage

from turning past it's 6 shift positions.
http://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpghttp://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpghttp://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpghttp://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpghttp://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpghttp://www.vcalc.net/disassy/tn_Img_3022.jpghttp://www.vcalc.net/disassy/tn_Img_3021.jpghttp://www.vcalc.net/disassy/tn_Img_3020a-3013.jpghttp://www.vcalc.net/disassy/tn_Img_3020.jpghttp://www.vcalc.net/disassy/tn_Img_3017.jpghttp://www.vcalc.net/disassy/tn_Img_3016.jpg


18/24


19/24

Now to the top carriage. Remove the nut on the center shaft. Carefully lift the top sleave out. The carriage must be kept flat and

upright as there are 18 ball bearings under the spider spring. Then

lift the clearing plate off.

Now the spider spring can be seen. There are two flat washers on top of the spider spring. Once they

are all removed the carriage casting can be studied. The 17 ball

bearings provide the positive numeral dial positioning.


20/24

There's a brass sleeve on the inside of the center sleeve. Here's the bottom of the clearing plate.

The linear gear (actually it's three laminations) turn each

numerical dial to it's home or zero position.

Here are all of the main clearing plate parts.
http://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpghttp://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpghttp://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpghttp://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpghttp://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpghttp://www.vcalc.net/disassy/tn_Img_3067.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3086.jpghttp://www.vcalc.net/disassy/tn_Img_3066a-3072.jpghttp://www.vcalc.net/disassy/tn_Img_3066.jpghttp://www.vcalc.net/disassy/tn_Img_3065.jpghttp://www.vcalc.net/disassy/tn_Img_3064.jpg


21/24

To the left of the "1" a brass shaft can be seen. The plunger and

spring at the top come out of this shaft. This mechanism keeps the

clearing plate from turning unless the carriage is lifted.

The top carriage less the clearing plate, springs, washers, and ball

bearings.

This little pin presses out from the inside.


22/24

Once the pin is out the cage can be unscrewed from the carriage

ring.

This is the bottom of the case with the carriage casting and axles.


23/24

The pin just to the right of the center ring works in conjunction

with the two pins in the top of the upper main casting to prevent

the top carriage from turning past it's 6 shift positions.

The carriage casting and axles can be snapped out of the cage.

DO NOT remove the axles from the carriage casting. The numerical dials can be slid off of the axles.

So here how I kept it all straight. It's real important to return each

part to their original position. Many are hand fit so put them back

the way they were!

And how many parts are there in a Curta? It's official, there are

605 parts counting the metal storage can!
http://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3025.jpghttp://www.vcalc.net/disassy/tn_Img_3087-3024.jpghttp://www.vcalc.net/disassy/tn_Img_3085.jpghttp://www.vcalc.net/disassy/tn_Img_3084.jpghttp://www.vcalc.net/disassy/tn_Img_3083.jpghttp://www.vcalc.net/disassy/tn_Img_3081.jpg


24/24

diasassembly a curta

Documents