Automatic temperature and humidity regulation – Motors – Fluid-operated
Patent
1981-09-23
1983-09-27
Tapolcai, William E.
Automatic temperature and humidity regulation
Motors
Fluid-operated
137489, 236 92A, G05D 2700
Patent
active
044064004
ABSTRACT:
A diaphragm operated pressure regulator having jointly operable principal and auxiliary springs, the auxiliary spring being readily exchangeable to vary the control characteristic of the regulator without affecting the maximum and minimum pressure adjustments of the regulator.
REFERENCES:
patent: 2611542 (1952-09-01), Crum et al.
patent: 3235180 (1966-02-01), Graham et al.
patent: 3307785 (1967-03-01), Currie
patent: 3366140 (1968-01-01), Dunn
patent: 4182488 (1980-01-01), Berkhof
Field George W.
Honeywell Inc.
Tapolcai William E.
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