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:
Feb. 21, 1989
Filed:
Jan. 14, 1988
Larry W Lind, La Mesa, CA (US);
Richard E Watt, La Mesa, CA (US);
U.S. Elevator Corporation, San Diego, CA (US);
Abstract
An elevator control switch and position indicator assembly for mounting on a panel comprises a piezoelectric element and a control circuit connected to the element for generating an elevator control pulse in response to an output signal from the element. A push button assembly is arranged such that when the push button is operated, a force is applied to the piezoelectric element, and the push button assembly is restrained so that it can only deflect the element a predetermined distance sufficient to produce an output signal. The assembly further comprises an integral indicator device for providing an indication to the operator that an elevator control signal has been generated. The invention also can be configured to provide an indication of the position of an elevator car.