Spring drum

Spring motor

Spring motor

Spring motor

Spring motor assembly

Spring motor especially suitable for use in a panoramic camera

Spring motor for generating constant torque

Spring operated pull cord re-wind mechanism for engine starters

Spring operating mechanism for a circuit interrupter

Spring power device

Spring powered prime mover

Spring powered prime mover

Spring prime mover unit

Stepping device

Stored energy operation for breakers

Suspension device

System and method of conversion of gravitation in this impulse o

Tensioning device for the energy store of an electrical switch

Timer

Timing mechanism