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. 02, 1996
Filed:
Sep. 28, 1994
Douglas Burton, Unionville, CT (US);
Eric K Jamieson, Farmington, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
Armature current I.sub.ARM is measured at full load and empty load. These two values are used to calculate a pre-torque armature current gain (MBIAS) and an overbalance correction is included in calculation of an elevator pre-torque armature current I.sub.ARM to compensate for an erroneous overbalance value for providing an armature current I.sub.ARM which does not cause rollback or rollforward of an elevator hoist motor. Samples of elevator car load and armature current I.sub.ARM are taken after the elevator brake is lifted, with the car at zero velocity, over a number of runs for continually recalibrating the pre-torque armature current gain (MBIAS) and offset, thereby compensating for any drift in performance of the loadweighing system.