Elevator shaftway intrusion device

Details Elevator shaftway intrusion device Elevator shaftway intrusion device

1993-05-04

1994-09-13

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187130, 187100, B66B 500, G08B 2100

Patent

active

053470940

ABSTRACT:
There is provided an elevator shaftway intrusion detector which utilizes a proximity detector including an energy source for generating a detection field within a zone of detection including the elevator shaft-side roof and floor and a corresponding receiver for receiving the detection field when an object enters the detection zone and thereafter generating a detection signal. A power supply and switching network are employed for applying power from the power supply to the proximity detector and which are responsive to the detection signal for applying power from the power supply to a detection indicator such as a siren.

REFERENCES:
patent: 3091760 (1963-05-01), Spenard et al.
patent: 3461422 (1969-08-01), Hansen
patent: 3609730 (1971-09-01), Hornung
patent: 3745550 (1973-07-01), Anthony et al.
patent: 4108281 (1978-08-01), Glaser
patent: 4897630 (1990-01-01), Nykerk
patent: 4987402 (1991-01-01), Nykerk
patent: 5025895 (1991-06-01), Leone et al.
patent: 5149921 (1992-09-01), Picado
patent: 5283400 (1994-02-01), Leone et al.

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