Electrical system and method for protecting premises subject to varying ambient conditions
United States Patent 3074053
US Patent References:
Alarm system
- - 2640975
Device for detecting motion in a confined space
- - 2749537
Combination radar and thermalenergy detection system
- - 3010102
Alarm system
- - 2640975
Device for detecting motion in a confined space
- - 2749537
Combination radar and thermalenergy detection system
- - 3010102
Inventors:
Mcdonough, Vincent T.
Howard, Pearson
Evans, Francis C.
Howard, Pearson
Evans, Francis C.
Publication Date:
01/15/1963
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Export Citation:
Assignee:
AMERICAN DISTRICT TELEGRAPH CO
Primary Class:
Other Classes:
340/553, 342/52, 367/94, 307/652, 340/556, 340/564, 340/527, 342/27
International Classes:
G08B13/00; G08B13/24; G08B17/00