Elevator position detecting device

Details Elevator position detecting device Elevator position detecting device

1980-12-31

1983-06-21

Trafton, David L.

Communications: electrical

Selective

Having indication or alarm

187 29R, B66B 302

Patent

active

043896316

ABSTRACT:
An elevator position detecting device which provides a correct floor position output signal even if the elevator case is moved irregularly between floors. In a first embodiment, a single cam is provided between each two adjacent floors and a single detector attached to the elevator cage produces an output signal to an electronic calculator each time the detector meets the engaging cam for upward member and leaves the cam for downward movement. A digital value corresponding to one floor is added to or subtracted from, respectively, a floor memory of the electronic calculator. In a second embodiment, two cams are provided between each two adjacent floors with each of the two cams being a fixed distance away from its adjacent floor. Two detecting means are provided on the elevator cage in this case and the content of the floor memory is divided by two to provide a correct cage position signal.

REFERENCES:
patent: 3149305 (1964-09-01), Glaser et al.
patent: 3967700 (1976-07-01), Tur et al.
patent: 4108282 (1978-08-01), Satoh et al.
patent: 4141435 (1979-02-01), Satoh

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