Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Plural radiant energy responsive devices
Patent
1987-05-21
1989-04-18
Boudreau, Leo H.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Plural radiant energy responsive devices
315158, 315159, 250221, 250342, 250353, 340567, G01J 508, G08B 1318
Patent
active
048230510
ABSTRACT:
A switch assembly actuated by passive infrared radiation for operating a ceiling light in a room, the switch assembly including first and second optical independent systems which senses infrared radiation over a 360.degree. range in horizontal plane including two separate vertical fields of view, a shallow cone-shaped "look-out" and a more vertical cone-shaped "look-down" sensing field of view for directing to a common sensing element passive infrared radiation produced by a person moving within the sensing field of the switch assembly, the sensing element connected to a control circuit which responsively turns on the light, maintains the light on while the person remains in the room, and turns the light off automatically when the person leaves the room. The switch assembly includes a one-piece optical shell enclosed within a housing which is adapted for installation in a conventional light bulb socket and including a socket for receiving the light bulb to be controlled.
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Boudreau Leo H.
Pittway Corporation
Powell Mark R.
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