Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1984-04-27
1985-07-02
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 50, 34 53, 34 55, F26B 2110
Patent
active
045259372
ABSTRACT:
A moisture monitoring dryer control apparatus for a dryer having an electrically operated motor, a heater and an exhaust duct through which air from the dryer passes whose humidity level signifies the residual moisture in the goods being dried. The apparatus comprises a moisture sensor assembly to be installed in the dryer air exhaust duct, and a dryer control and display unit electrically connected to the sensor to receive electrical signals therefrom. The moisture sensor being a resistance type includes a head portion housing a thin piece of hygroscopic material sandwiched between a front porous filter member and a perforated backing plate in substantially coextensive relation, a pair of electrical conductors connected respectively to the filter member and the backing plate and to electrical circuitry in the control and display unit, a high resistance air sample cup member engaging and extending rearwardly from the filter member forming a substantially closed chamber rearwardly of the perforated plate into which air can enter through the porous filter but must return therethrough, and an elongated extension tube member having the head portion of the sensor carried on an end thereof to be supported by the tube member in an air sensing position in the exhaust duct with the longitudinal axis of the tube member arranged perpendicular to the direction of air flow through the duct and perpendicular to the sandwiched hygroscopic material piece, backing plate and filter member.
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patent: 4388766 (1983-06-01), Sanderson
Strandberg Robert C.
Strandberg, Jr. Charles F.
Lane, Jr. Munson H.
Schwartz Larry I.
Strandberg Engineering Laboratories, Inc.
Westphal David W.
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