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:
Jul. 01, 1997
Filed:
Nov. 25, 1994
Michael Paul Weir, Ballston Lake, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Apparatus for electrically coupling a motor to a power source and providing overload protection to the motor includes a controller having a programmable module for periodically computing data indicative of motor temperature based upon motor current. The controller supplies an output signal based at least upon the computed motor temperature data. A contactor, responsive to the controller output signal, deenergizes the motor whenever any last-computed motor temperature data reaches or exceeds a threshold temperature. The last-computed motor temperature data is stored in a memory prior to the motor being deenergized. A signal from a timer circuit indicative of elapsed time after the motor is deenergized, together with the stored motor temperature data, enable the programmable module to compute fresh date indicative of motor temperature subsequent to the motor being deenergized. The programmable module, upon initialization with the fresh motor temperature data, can readily resume periodic computation of motor temperature data based upon current now drawn by the motor.