Elevator car top intrusion device

Details Elevator car top intrusion device Elevator car top intrusion device

1990-01-09

1991-06-25

Pellinen, A. D.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

340555, 361173, 361179, B66B 500

Patent

active

050258958

ABSTRACT:
There is provided a detection system for detecting attempted entry onto the shaft-side roof of an elevator cab which includes a power supply for supplying power to the system, a proximity detector in electrical connection with the power supply which is disposed proximate the roof of the cab for detecting an object entering a zone of detection including the top of the cab, the detector in a preferred embodiment including an optical source for generating a detection beam and a corresponding optical receiver for receiving the detection beam when it is diffused by an object entering the detection zone and for providing a detection signal when the object enters the detection zone, and detection indicator responsive to the detection signal for indicating an attempted entry.

REFERENCES:
patent: 3641549 (1972-02-01), Misek et al.
patent: 3745550 (1973-07-01), Anthony et al.
patent: 4052716 (1977-10-01), Mortensen
patent: 4067416 (1978-01-01), Lowry
patent: 4266124 (1981-05-01), Weber et al.
patent: 4733081 (1988-03-01), Mizukami
patent: 4879461 (1989-11-01), Philipp

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