Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1997-05-29
1998-06-09
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
With particular system function
340522, 340541, 340567, 340584, 340600, 340578, G08B 1900
Patent
active
057641439
ABSTRACT:
A combination temperature unit/intruder sensor is described wherein the thermistor used for adjusting the sensitivity of a passive infrared detector in a microprocessor of the unit is also used for the secondary purpose of indicating whether the ambient temperature of a protected zone falls outside a pre-selected temperature range. The detector, in addition to providing signals indicative of an intruder, can provide indications of possible freezing, thawing, or fire conditions. Both the intruder detection and temperature sensing capabilities are provided in a single, inexpensive housing.
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King Alarm Product Brochure, p. 7, Circa. Spring 1997.
Hofsass Jeffery A.
Lee Benjamin C.
Mugno John R.
Napco Security Systems, Inc.
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