Title: Relative humidity control

Abstract: Apparatus for measuring and controlling the relative humidity of exhaust air from an industrial drier in which exhaust air is passed across a dry bulb and a wet bulb thermocouple from which a voltage is derived providing a measure of the relative humidity in the air in the sample. This voltage is used to control the amount of exhaust air from the drier to atmosphere. The wet bulb thermocouple is cyclically dipped in a bowl of water under the control of a timer system of the voltage to control the amount of exhaust air discharged until the wet bulb thermocouple is equilibrated with the exhaust air sampled after dipping.

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Inventors: Chaikin, Malcolm (Centennial Park, AU)
Nossar, Mstislav S. (Peakhurst, AU)

Application Number: 774014
Filing Date: 1977-03-03
Publication_date: 1978-12-12
Assignee: Unisearch Limited (AU)
Primary Class(es): 236/44A 73/77, 73/335.02, 73/335.08
Other Classes:
US Patent Ref:

2128176	Aug, 1938	Bast	236/44.
2504278	Apr, 1950	Read	236/44.
2754063	Jul, 1956	Kersten	236/44.
2935009	May, 1960	Cloud	236/44.
3603135	Sep, 1971	Kawaguchi	73/77.

Other Refs:
Primary Examiner: Gordon, Clarence R.
Assistant Examiner:
Attorney: