Snow, ice, and sleet sensing device
United States Patent 2717957
US Patent References:
Warning device
- - 2269019

Humidity measuring
- - 2295570

Amplifier system
- - 2329423

Electronic apparatus
- - 2357371

Electrical device
- - 2358406


Inventors:
Ohlheiser, Carlton E.
Publication Date:
09/13/1955
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Assignee:
AMERICAN INSTR COMPANY INC
Primary Class:
307/650
Other Classes:
338/35, 361/170, 338/14, 340/581, 340/602, 236/68B, 62/140, 236/1R, 73/170.260, 73/335.050, 219/500, 126/271.100, 236/44E, 361/178, 236/94, 219/201, 327/512, 239/DIG.015, 324/696, 338/25, 307/651
International Classes:
H01Q1/02
US Patent References:
2375456Photoelectric safety circuit
2468791Conductivity control
2490965Electronic temperature control for warming blankets and the like
2553060Heating control system
2564597Flame detection apparatus
2611643Automatic sprinkling device