By Liquids Or Gases (driven By Liquids Or Gases Subclass 21; Winding Up By Pneumatic Motor Subclass 39; Winding Up By Electrothermal Or Electro-pneumatic Driving Means Subclass 427; Driving Of The Clockwork By Such Means Subclass 495) [g04b 5/20d] Patents (Class 968/63)