Timer

Details Timer Timer

G - Physics

04

C

G04C 23/06 (2006.01) H01H 43/10 (2006.01)

Patent

CA 2314698

A cam-operated timer for a household appliance has a variety of improvements. An audible and tactile feedback member engages a textured surface on the cam wheel, to produce desired audible and tactile feedback when the timer is manually set. When the timer is manually set, the cam-actuated switches are moved away from the cam surfaces, and a clutch is opened to permit bi-directional slip between the cam wheel and motor, so that the sole source of audible and tactile feedback is the audible and tactile feedback member. The timer also features lanced switch arm contacts, that provide a sharp contact edge to permit the switch arms to make good contact with adjacent switch arms. The switch arms are mounted in a stack of wafers, where each wafer may have switch arms of differing thickness or metal, allowing high current and low current switches to be mixed. Features in the housing are used to receive and locate the wafers to prevent inaccuracies in wafer thickness from accumulating through the stack of wafers. Also, the motor and geartrain are reduced in size. The motor comprises a stator plate and a rotor mounted for rotation in the stator plate. The geartrain comprises meshing gears positioned on both opposite sides of the stator plate and mounted directly to the stator, for providing a gear reduction of the rotation of the motor.

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