Elevator position detector

Details Elevator position detector Elevator position detector

1979-04-27

1980-11-11

Trafton, David L.

Communications: electrical

Selective

Having indication or alarm

368120, 340686, 343112D, G08B 2100, B66B 302

Patent

active

042335884

ABSTRACT:
A plurality of identical signal delay elements are disposed within a hoistway one for each landing floor and cascade connected to a signal generator. Each delay element is located at its position where a signal from the signal generator appears at its output with a time delay corresponding to the associated floor. The delayed signal is detected by a signal detector disposed on an elevator car stopped on or traveling past any of the floor. A time delay measurement device counts clock pulses occurring between the detected signal and the signal from the signal generator to determine a time delay between both signal and therefore the floor on which the elevator car stops, or past which it is traveling.

REFERENCES:
patent: 3199630 (1965-08-01), Engel et al.
patent: 3204180 (1965-08-01), Bray et al.
patent: 3219925 (1965-11-01), Borley et al.
patent: 4041495 (1977-08-01), Martin

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