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:
Nov. 17, 1992
Filed:
Apr. 25, 1991
Birch L DeVault, Arden, NC (US);
Glenn H Edwards, Leicester, NC (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
An interlock, for a pair of electromagnetic switches, includes operating members which are pivoted by movement of armatures of the switches between off and on positions. Ring segment cams are carried by the respective operating members along arcuate paths which intersect such that movement of one switch out of the off position mechanically blocks movement of the armature of the other switch out of the off position. For side by side electromagnetic switches, the operating members are directly confronting. For other arrangements of the switches, such as one above the other, the operating member of one switch includes a first pivot member pivoted by the associated armature, and a second pivot member on which the ring segment cam is carried, confronting the second operating member, and connected to and pivoted with the first pivot member by a connecting member.