Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Patent
1990-10-22
1992-02-04
Tapolcai, William E.
Automatic temperature and humidity regulation
Ventilator type
Electrically actuated
F24F 1308
Patent
active
050853686
ABSTRACT:
A system is described for use in controlling the position of window closures in poultry houses without the use of significant electric power in response to sensed air conditions within the house. The system includes pulleys releasibly loaded on a cable connected to a curtain which have respective weights that may lift and lower the curtain when the pulleys are released.
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Beckman John B.
Blickstein Martin
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