Sequential timer with programmable dual frequency drive

摘要

There is disclosed a sequential timer with a programmable dual frequency drive. The timer includes a relatively flat housing which mounts a circular, flat disk having arcuate switch actuating cams on at least one face thereof. A plurality of switches are mounted in the housing and are sequentially actuated by the arcuate cams upon rotation of the disc. Drive pawls are provided which coact with teeth on the periphery of the disk. One of said pawls is driven at a multiple of the frequency of the other pawl so that the disk is driven at a relatively rapid rate of advance when the disk is performing a switching function and at a relatively slow rate of advance during a steady operation state.