Apparatus for monitoring elevator cages for crime prevention

Details Apparatus for monitoring elevator cages for crime prevention Apparatus for monitoring elevator cages for crime prevention

1990-11-21

1992-07-21

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

187140, G01P 1300

Patent

active

051315084

ABSTRACT:
Apparatus for monitoring the cage of an elevator for crime prevention including a connection establishing two-way voice communication between a telephone/television within the elevator cage and a similar device at a remote monitoring point. Communication is automatically established in response to a signal, such as generated by elevator call buttons, utilized in operation of the cage.

REFERENCES:
patent: 3973648 (1976-08-01), Hummert et al.
patent: 4057845 (1977-11-01), Ejiri et al.
patent: 4555724 (1985-11-01), Enriquez
patent: 4930604 (1990-06-01), Schienda et al.
patent: 4941192 (1990-07-01), Mishima et al.

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