Electronic timer switch

Details Electronic timer switch Electronic timer switch

1974-05-09

1976-02-17

Smith, Jr., David

Electrical transmission or interconnection systems

Switching systems

Switch actuation

328 48, 328129, H01H 700, H01H 4300

Patent

active

039393615

ABSTRACT:
An electronic timer switch adapted for installation in a standard switch receptacle and operative in response to applied AC power to provide a manually selectable operative duration. The timer switch is manually actuable to select an intended time interval and employs electronic circuitry for counting pulses derived from the input power frequency and to cause activation of a power switch during the selected interval. The switch can include indicators denoting selected and remaining time intervals and can include circuitry providing a warning indication of the approaching end of a selected interval.

REFERENCES:
patent: 3662186 (1972-05-01), Karklys
patent: 3840752 (1974-10-01), Eshraglan

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