Remote control switching

Details Remote control switching Remote control switching

1977-01-03

1978-05-23

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

315157, 250213R, H01J 3912, H01J 3150

Patent

active

040912760

ABSTRACT:
Electrical appliances, particularly A.C. operated appliances, are turned on and off from remote locations by shining a beam of light, using a flashlight or the like on a photoelectric transducer/semiconductor switching device interconnected between a power line and the appliance, the switching device being bi-stable, activatable for either switch-on or switch-off operations by a signal from a single photoelectric transducer, and further comprises delay means responsive to the occurrence of a switch-on or switch-off operation to prevent a subsequent switching operation until a number of seconds have elapsed to allow for variations of human response in handling of the activating light beam, thereby preventing on and off chattering.

REFERENCES:
patent: RE27393 (1972-06-01), Anselman
patent: 3584222 (1971-06-01), Nesbitt
patent: 3629590 (1971-12-01), Case
patent: 3754177 (1973-08-01), O'Reilly
patent: 3758826 (1973-09-01), Zizola
patent: 3767924 (1973-10-01), Charles et al.
patent: 3790848 (1974-02-01), Lai

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