Thermoelectric door operating mechanism
United States Patent 2665129
US Patent References:
/RE22709.html
- - RE22709

/0595343.html
- - 0595343

Control system
- - 1715750

Optical pyrometer
- - 1716775

Radiant-energy control system
- - 1760479


Inventors:
Vernon, Durbin
Button, Charles T.
Publication Date:
01/05/1954
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Assignee:
NAT PNEUMATIC CO INC
Primary Class:
49/25
Other Classes:
250/338.100, 49/1, 340/595, 49/31, 236/69, 246/DIG.001, 318/473
International Classes:
E05F15/20
US Patent References:
1810172System of temperature control
1820764Skylight
1929273Door operating apparatus
2031226Door operator
2173455Apparatus for operating doors
2180580Control system
2332154Radiant energy alarm system
2346560Window thermostat
2442823Radiant energy receiver
2499889Control system for closure means
2530980Control system for window heaters
2532287Speed control system
2540963Resistance thermometer element
2547173Long wave length infrared radiation detector
2556065Electric control system for heating of enclosures
2556973Cycler
2573661Thermostatic stoker control system
2608635Temperature regulating system