Curtain control system for poultry houses

Details Curtain control system for poultry houses Curtain control system for poultry houses

1975-02-05

1976-08-03

Envall, Jr., R. N.

Animal husbandry

Feeding device

Hopper and trough

49 1, 119 21, 160 6, 160 9, 236 41, E05F 1520

Patent

active

039731731

ABSTRACT:
The side curtains of a poultry house are automatically opened upon a power failure in the electrical circuit of the ventilating system. An electrical monitoring circuit activated responsive to such power failure, releases a winch which normally maintains the curtains in a closed position, causing them to drop to an open position. The electrical monitoring system includes a time delay relay which is activated upon the power failure to release a normally latched mechanism. A latching cable is thus released, freeing the winch.

REFERENCES:
patent: 3042001 (1962-07-01), Dubie et al.
patent: 3429298 (1969-02-01), Thomason
patent: 3474761 (1969-10-01), Thomason
patent: 3511299 (1970-05-01), Newell et al.
patent: 3802479 (1974-04-01), Newell et al.

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