Automatic temperature and humidity regulation – Thermostatic – Expanding solid
Patent
1974-07-12
1976-03-16
Camby, John J.
Automatic temperature and humidity regulation
Thermostatic
Expanding solid
236 87, 137 82, 251 78, 236 99G, G05D 2302
Patent
active
039441350
ABSTRACT:
A condition responsive valve construction having a housing provided with a valve seat. A pair of metallic balls are secured together in abutting relation and are movable toward and away from the valve seat so that one of the balls acts to open and close the valve seat. A lever is movably mounted in the housing and acts between the balls to cause movement thereof upon certain movement of the lever caused by a condition responsive means sensing different conditions. Spring means are provided for tending to hold the balls in the valve seat closed position thereof and in a certain valve seat open position thereof so that the lever can have lost motion travel between the balls for creating a differential in the conditions required to open and close the valve seat.
REFERENCES:
patent: 1491189 (1924-04-01), Birtch
patent: 2757688 (1956-08-01), Klingler
patent: 3104813 (1963-09-01), Baatrup
patent: 3166247 (1965-01-01), Malone et al.
patent: 3215162 (1965-11-01), Carver
patent: 3237633 (1966-03-01), Sanville
patent: 3297044 (1967-01-01), Thorburn
patent: 3329393 (1967-07-01), Parks
patent: 3580502 (1971-05-01), Duchek
Camby John J.
Robertshaw Controls Company
Yuen Henry C.
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