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:
Dec. 29, 1981
Filed:
Dec. 28, 1979
William R Caputo, Wyckoff, NJ (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
An elevator system of the traction type having a direct current drive motor and a solid-state, dual-bridge converter power supply. Protective and monitoring apparatus reduce the probability of fuse blowing due to improper gating of a controlled rectifier device, and/or a power supply interruption, while enabling the system to override longer power supply interruptions without initiating shutdown in certain instances. The deceleration range of the elevator car is narrowed, when an orderly shutdown is required, by sensing predetermined parameters of the elevator system and logically selecting the value of a dynamic braking resistance in response thereto.