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

Abstract: A modular signal device which fills the need of the elevator industry for differing types of signal devices wherein a surface mounted base plate includes turned up small ends, with a cover ring surrounding the base plate and utilizing a bolt at one small end and an adjusting screw on the other small end to rearwardly retain the turned up ends, with the cover ring including an inner collar which carries and retains a cover plate, with the cover plate including at least one opening and concentrically arranged second threaded bolts in order to receive switching elements such a push buttons, with first threaded bolts serving to attach the cover plate onto the collar of the cover ring. In further embodiments, the cover plate takes the form of lenses with filters, grids or arrow masks which serve to outwardly convey the signals produced by the signal devices attached to the collar.