Non-tactile switch

Details Non-tactile switch Non-tactile switch

1980-01-17

1982-09-28

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Electric switch in the supply circuit

307117, 307118, 250229, 315156, 315159, H05B 3702

Patent

active

043520464

ABSTRACT:
Switching apparatus for energizing a load from an a.c. current source where the apparatus is actuated to an "on" condition by the application of a source of light, such as a match. A photo-responsive, solid-state element such as a light actuable SCR is mounted within the apparatus at the end of a passageway of length and width selected to preclude an influence of ambient lighting. The "on" condition of the device is sustained through the utilization of a feedback light path, the source of which is an incandescent lamp. Switching "off" the apparatus is carried out by blowing on an opaque flap from a rest to a transient position temporarily blocking the feedback light path.

REFERENCES:
patent: 3479561 (1969-11-01), Janning
patent: 4065669 (1977-12-01), Bogel

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