Push button assembly

Details Push button assembly Push button assembly

1994-10-12

1995-12-26

Wong, Peter S.

Elevator, industrial lift truck, or stationary lift for vehicle

Having call button with indicator

200309, 200317, B66B 114, H01H 900

Patent

active

054779421

ABSTRACT:
An electronic push button assembly, used as a call and signal generator in elevator controls and installed, via rear surface attachment, in a service control station or indicator board at floor stops and in elevator cars, consists of a push button guide, a carrier plate, an optical acknowledgement device and an electronic portion, wherein the mechanical portion of the push button assembly includes a plunger element, guided and limited for movement by an illuminated ring plate which, through an elastic pressure cap, pressure activates a pressure sensitive resistance FSR when the push button assembly is activated, with the change in resistance of the FSR, resulting from the mechanical pressure, produces a potential change within a voltage divider whereby, via a trigger/preamplifier, a switching transistor is activated and in turn switches on a corresponding load, a potential separation being utilized by the load, via a contact, to complete the acceptance switching circuit, with the basic mechanical construction permitting differing variations relative to design and function.

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