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, 1981
Filed:
Dec. 27, 1979
Michael W Hmelovsky, Warehouse Point, CT (US);
Otis Elevator Company, Hartford, CT (US);
Abstract
An elevator system includes a microprocessor-based cab controller mounted directly on an elevator car, which controls elevator door motion in response to the difference between elevator door velocity and a desired dictated door velocity. The signals driving the elevator motor include compensation signals for hoistway door spirators, static door friction, and variations in the door operator mechanism as a function of door position, and are generated, in the disclosed embodiment, to take into account the variation in door motion as a function of door motor motion. An exemplary elevator system, an exemplary microprocessor-based controller, and logic flowcharts for an overall door control program, as well as details of the invention herein are disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile