Light-activated remote control unit

Details Light-activated remote control unit Light-activated remote control unit

1975-04-17

1977-09-13

Smith, Alfred E.

Tuners

Remotely controlled tuner

250206, 250209, 250210, H01J 3912, H01H 4724, H01H 4732

Patent

active

040485960

ABSTRACT:
A remote control unit for an electrical appliance includes a pair of photocells and one or more threshold devices connected to sense differential illumination of the photocells. The threshold devices, in turn, emit signals that initiate operation of a control device connected to the appliance. The threshold devices are preferably gaseous discharge lamps whose light outputs are sensed by radiation-response switching circuitry.

REFERENCES:
patent: 2964685 (1960-12-01), Raymond
patent: 3089065 (1963-05-01), Worden
patent: 3131332 (1964-04-01), Guri
patent: 3248549 (1966-04-01), Sanabria
patent: 3325593 (1967-06-01), Platt et al.
patent: 3529214 (1970-09-01), Corn
patent: 3573684 (1971-04-01), Dickinson
patent: 3621356 (1971-11-01), Chi On
patent: 3883736 (1975-05-01), Liddell

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