Title:
Automatic alarm system
United States Patent 3111656
Inventors:
Barrett, Nat A.
Fuller, Neal H.
Publication Date:
11/19/1963
Export Citation:
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Assignee:
Barrett, Nat A.
Fuller, Neal H.
Primary Class:
340/517
Other Classes:
218/89, 340/527, 340/539.1, 340/539.22, 340/593, 341/174, 346/33R, 346/136, 455/18, 455/66.1
International Classes:
G08B17/00; G08B25/10; G08B17/00; G08B25/10
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US Patent References:
2899674N/A
2673975Fire alarm system
2656528System for indicating time-space lag and lead
2552788Inaudible control circuit for starting and stopping phonograph systems
2447752Apparatus for recording an oscillographic record