Oscillators Acting By Gravity, E.g., Pendulum Swinging In A Plane, Etc. (setting The Pendulum To The Required Length Subclass 115; Temperature Compensation For Pendulums Subclass 128; Bearings In General, E.g., Knife-edge Subclass 271, Etc; Clocks Fitted In Pendulums Subclass 396; Imitation Pendulums Driven By The Clock Mechanism Subclasses 387 And 388; Pendulum Ornamentation Subclass 389; Contacts Actuated By A Pendulum Subclass 546; Measurement Of Force With A Pendulum G01v 7/12) [g04b 17/02] Patents (Class 968/105)