The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1984
Filed:
Aug. 26, 1981
James A Sutton, Jr, Statesville, NC (US);
Other;
Abstract
An apparatus responsive to electric power failure for opening curtains or doors normally covering ventilation openings in a confinement house of the type used for raising poultry and livestock is disclosed. An electromagnet (59) is provided which is energized by the electric power supply (41) to the house (10) and is de-energized upon failure of the electric power supply (41). A pivoted metal strip (61) is normally in contact with the magnet (59) and is interconnected by means of a cord (66) with the winch (25) which is used to raise and lower the curtains (16). When the electric power (41) fails and the electromagnet (59) is de-energized, the cord (66) releases, and allows the curtains (16) to fall under their own weight. A capacitor (78) prevents de-energization of the magnet (59) when momentary power failures occur.