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:
Oct. 29, 1996
Filed:
Feb. 25, 1994
Bruno C Doerwald, Duluth, GA (US);
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Abstract
An overload relay including a thermal actuator heated by a control circuit is disclosed herein. The overload relay includes a contactor having a pair of contacts for interrupting the application of power from one or more power conductors to a load such as a motor. The relay also includes current transformers associated with each power conductor configured to produce signals representative of the electrical current in the power conductor. The control circuit is coupled to the current transformers and monitors the current signals when the contacts of the contactor are closed. In response to the current signals exceeding predetermined limits, the control circuit applies a heating current to the thermal actuator. In response to the heating current, the thermal actuator opens a switch which controls the application of power to the solenoid of the contactor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile