lowering mechanism torsion springs reverse cam hydraulic piston clock spring padded free fall string
TRANSCRIPT
Lowering Mechanism
Torsion Springs Reverse Cam Hydraulic Piston Clock Spring Padded Free Fall String
Torsion Springs
+ Easily made as bolt-on
- Weight may cause need for more resistance
- Torsion springs need to be very strong
Reverse Cam
+ Smooth motion+ Easily manufactured- Requires significant force- Will generate much wear
Hydraulic Piston
+ Easily regulates closing speed
- Not simple to “bolt-on”- Obtrusive and large- Possibly expensive
Clock Spring
+ Easily reset+ Easily incorporated
into seat design- Damping may be
difficult- Design by trial & error
StringUP DOWN
String attached to back of toilet and seat String goes taught
stopping the fall
+ Inexpensive- Easy to
break- may still slam- Uninteresting
Ball Maze
+ Very neat and fun+ Visually pleasing (if
Plexiglas idea is used- May be loud- Reset may be a
problem with manual override
- Seat may be too thick
Falling liquid/sand
Locking Pin
Pivot
Liquid Holding Tanks
+ Self contained- Seat may be too thick- May be difficult to
reset quickly- Locking pin may
complicate manual override
Falling Weights
+ Release and timing are integrated already
- May be obtrusive- Two different
orientations may cause problems
Locking Mechanism
Spring/Ball Bearing Lock Spring-loaded Pin Lever attached to seat Divot in Reverse Cam None (Equilibrium)
Divot in Reverse Cam
+ Smooth locking+ Easily overcome by
human means- Not easily overcome
mechanically