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:
Mar. 17, 1987
Filed:
Jun. 05, 1985
Alan L Husson, Long Valley, NJ (US);
Kim E Morris, Chester Township, Morris County, NJ (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Methods and apparatus for selectively controlling the energization of a plurality of lamps in an elevator system, utilizing a microcomputer based lamp controller, and for detecting failure of the lamps while utilizing a minimum number of communication lines. A first communication line synchronizes signals which are placed on the remaining communication lines. Signals indicating the need for lamp energization are detected by the lamp controller. When such signals are recognized by the lamp controller, the lamp controller prepares and places signals on a second communication line which requests lamp energization of the associated lamps, and it stores indications of the requests. Signals responsive to the detection of actual energization of a lamp are placed on a third communication line and directed to the lamp controller. The lamp controller logically relates signals detected on the third communication line with the stored indications of lamp energization requests to determine or test system integrity, and to detect lamp burn-out.