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. 22, 1988
Filed:
Jun. 19, 1987
Jeffrey W Blain, Scenic Lakes Township, Sussex County, NJ (US);
Richard H Ludwig, West Caldwell, NJ (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
An elevator control system with a local area network on the traveling cable and distributed control circuit safeguard for loss of remote microprocessor control with a car door open when floor releveling distance exceeds the landing zone limit. The elevator control circuit is interactive with the car driving apparatus and with the car door circuit so that when the driving apparatus for the car is leveling the car for passenger load weight gain or loss, the car door is signaled to remain open in the zone of the target floor so long as the distance that the car moves is within the elevator safety code requirements. A time delay relay interfaced with an output channel circuit of the microprocessor times out to stop car driving apparatus if the distance limit is exceeded.