Automatic temperature and humidity regulation – Thermostatic – Expanding solid
Patent
1987-05-28
1988-07-05
Joyce, Harold
Automatic temperature and humidity regulation
Thermostatic
Expanding solid
52573, 98114, 236 49, F24F 1315
Patent
active
047546964
ABSTRACT:
An automatic temperature responsive ventilator including a housing having side walls defining an air passageway and an openwork grid across the passageway. At least one shutter is mounted within the housing, with one end of one shutter element being associated with a bimetallic spring, the inner end of which is received within an opening in one housing side wall. An outer end of the spring is secured to the shutter. A size-adjustable installation device includes a threaded portion which engages a threaded opening in the housing or in a member held non-rotatable relative to the housing. One end of the threaded portion is integral with a non-threaded distal portion having a diameter less than the diameter of the threaded portion and carrying thereon the small diameter end of a conically shaped compression spring. Variations in ambient temperature cause the shutter element to open and close automatically.
REFERENCES:
patent: 4243175 (1981-01-01), McSwain
patent: 4493456 (1985-01-01), Sarazen, Jr. et al.
patent: 4587892 (1986-05-01), Witten
Beam Dennis A.
Sarazen Paul M.
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