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:
Jun. 08, 1982
Filed:
Nov. 08, 1979
Alvin J Carli, Sebring, OH (US);
The Alliance Manufacturing Company, Inc., Alliance, OH (US);
Abstract
A centrifugal switch is used in the motor control circuit in a garage door operator. Such operator has a motor driving through a friction clutch to move the door in opening and closing directions. If an overload condition on the door is encountered, the friction clutch will slip, slowing the driven member of the friction clutch. A cantilever contact blade is connected for rotation with the clutch driven member and slows, as well as moves radially inwardly, to engage a second conductor member which is coaxial with the output of the operator. This effects a switch-closed condition which acts through a control circuit to de-energize the electric motor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.