Call signal conversion apparatus for elevator system

Details Call signal conversion apparatus for elevator system Call signal conversion apparatus for elevator system

1981-01-26

1983-03-15

Trafton, David L.

Communications: electrical

Selective

Interrogation response

340 20, 340654, G08B 536

Patent

active

043769306

ABSTRACT:
A call signal conversion apparatus for an elevator system comprises a call button device as a serial connection of a call button and a call registration lamp; a control device as a computer for inputting a call signal given by actuation of the call button, registering the calling and outputting the call registration signal; and a signal conversion circuit connected between the button device and the control device. The signal conversion circuit comprises a call detection circuit for detecting the call signal; a waveform shaper circuit which shapes the call signal to output the signal to the control circuit; a memory circuit for memorizing the call signal or the call registration signal; and a driving circuit for outputting the signal for turning on or off the call registration lamp by detecting the output of the memory circuit.

REFERENCES:
patent: 3967700 (1976-07-01), Tur et al.
patent: 4120381 (1978-10-01), Otto et al.

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