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. 03, 1992
Filed:
Jun. 13, 1991
Kenneth J Sullivan, Jr, Oak Brook, IL (US);
Bradley A Mitchell, Antioch, IL (US);
ECS Corporation, Oak Park, IL (US);
Abstract
A handrail monitoring system for use in a passenger conveyor such as an escalator, moving sidewalk or the like, compares the speed of each handrail against their nominal installed speed and responds when the handrail speeds differ from nominal by a selected percentage, i.e., when the difference in speed is 5, 10, 15 or 20%, as selected by an operator. Handrail speed is compared with the nominal handrail speed which may be established over a continuous range of speeds depending upon the installation. The system outputs either an immediate audio and/or visual alarm upon excessive slowing of a handrail or a delayed audio and/or visual alarm following a selected time interval to allow for temporary, short interruptions in handrail transport not due to conveyor system malfunction, but rather frequently due to passenger interference with the handrail. Provision is also made for automatically stopping the escalator upon detection of a handrail fault as well as recording the number of such faults in monitoring handrail operation.