Control device responsive to infrared radiation

Details Control device responsive to infrared radiation Control device responsive to infrared radiation

1980-10-31

1982-08-24

Miller, J. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361175, 340600, 340573, C08B 1318

Patent

active

043464270

ABSTRACT:
A device responsive to infrared radiation can control a current line to such items as interior lighting or room air conditioners in order to activate these items in response to the presence or absence of a person within their service area. The device includes an infrared detector comprised of a thermopile formed by thin-film techniques for producing detection signals amplified by a series of amplifier stages having filters passing only signals corresponding to motion of a human body. The amplified signals are led to the reset port of a timing circuit which will open the current line when no human motion is sensed within a predetermined time period. Further, the housing for the device includes a protruding neck portion carrying the infrared detector and adapted to be held by a retaining nut after insertion through a ceiling unit or the like.

REFERENCES:
patent: 3439358 (1969-04-01), Salmons
patent: 3924130 (1975-12-01), Cohen et al.
patent: 3958118 (1976-05-01), Schwarz
patent: 4029176 (1977-06-01), Mills
patent: 4031408 (1977-06-01), Holz
patent: 4196425 (1980-04-01), Williams, Jr. et al.

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