Title:
Portable thermal alarm and signal system
United States Patent 2982949

Inventors:
Pivetz, Albert W.
Publication Date:
05/02/1961
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Assignee:
Pivetz, Albert W.
Primary Class:
340/594
Other Classes:
340/326, 340/586, 340/815.690
International Classes:
G08B17/06
US Patent References:
2456038Portable fire alarm device
2550673Alarm switch
2611016Portable fire alarm unit
2663860Thermal means of indicating temperature and electric failure
2741099Apparatus for indicating and controlling the temperature of products within predetermined limits