Clock Train Patents (Class 200/35R)
Rotary (Class 200/36)
Cam operated (Class 200/38R)
Latch trip (Class 200/39R)
Hand operated (Class 200/35H)
Radio (Class 200/35B)
Seasonal change (Class 200/35EQ)
Automobile or radio (Class 200/35A)
Rewinding for clock (Class 200/35W)
  • Timer switch assembly
    Patent number: 3935404
    Abstract: A device for randomizing the operation of an electrical switch such that it can be used to switch electrical devices at random time intervals. This device uses a mechanism which periodically disconnects a drive train from a motor, randomizes the position of the drive train, and uses the resultant position of the mechanism to trip an electrical switch.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: January 27, 1976
    Inventor: Holger Persson