US 5,477,942 A · Push button assembly

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.

Claims12

Dependent claims

An electronic push button assembly for use as a call and signal generator in elevator controls for installation with rear surface attachment in service control stations or indicator boards at floor landings and in elevator cars that includes a carrier plate, means for providing an optical acknowledgement of actuation of an elevator call and an electronic portion, said push button assembly comprising:

a plunger element, said plunger element having opposed inner and outer sides, said inner side having both a projecting edge and a central control extension;
a reflector plate;
means, including said plunger projecting edge, for guiding said plunger element for a limited axial movement , for a first distance, relative to said reflector plate;
a pressure sensitive element affixed to and axially spaced from said reflector plate for a second distance, said second distance being less than said first distance;
a generally circular elastic pressure cap ,affixed to said control extension, for acting on said pressure sensitive element, upon actuation of said plunger element with a pressure not exceeding a maximum tolerable value, said maximum tolerable value being limited by an elastic deflection between said pressure cap and said pressure sensitive element over a third distance, said third distance being the difference between said first and second distances;
and
said plunger element being adapted to accept one of a plurality of differing pressure plates.

4 more elements

Dependencies are inferred from the claim text.

Push button assembly

Life of this patent

Push button assembly

Life of this patent

Abstract

Claims12