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Switch timer

  • US 4,494,012 A
  • Filed: 11/07/1983
  • Issued: 01/15/1985
  • Est. Priority Date: 10/26/1981
  • Status: Expired due to Fees
First Claim
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1. A controller to be connected across a first conductor extending to one terminal of a load device whose other terminal is connected to one of a pair of AC power lines having the applied voltage thereacross and a second conductor extending to the other power line, said controller comprising:

  • parts support means adapted to be mounted in or upon a standard wall switch box, said parts support means having extending therefrom first and second controller input lead means to be respectively connected to said first and second conductors;

    said parts support means having mounted thereon a threeposition manually operable switch having a movable pole and stationary timer-on, power-off and load-on contacts to which said movable pole can make selective sequential engagement, a handle secured to said movable pole and projecting forwardly from said parts support means to project through a vertical slot in a cover plate and adapted to be moved vertically by the operator into any one of three stable positions where said movable pole selectively contacts one of said stationary contacts, said load-on contact being connected to said second controller input lead means and said movable pole being connected to said first controller input lead means so that when said movable pole is moved to said load-on contact the load device becomes energized, a timer which when energized supplies a control signal for a preset period of time, DC voltage producing means coupled between said timer-on contact and said second input lead means for developing a DC voltage to energize said timer, said DC voltage means including rectifier means and voltage storage means which is charged through the rectifier means when the AC applied voltage is coupled thereto, said timer having power input terminals coupled to said storage means to be energized therefrom, and power switch means having terminals connected between said timer-on contact and said second input lead means and adapted when in a low impedance condition to couple AC power to the load through said controller input lead means, said power switch means having a control terminal to which said control signal is coupled to effect a low impedance condition between said terminals which then interconnects said timer-on contact and second controller input lead means.

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