Elevator system

Details Elevator system Elevator system

1976-09-07

1978-01-10

Schaefer, Robert K.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 502

Patent

active

040674169

ABSTRACT:
An elevator system including terminal slowdown control which includes a source which provides a beam of electromagnetic radiation, a receiver of such radiation, and spaced markers disposed in a terminal zone which interrupts the beam of electromagnetic radiation as the elevator car approaches a terminal floor. A monitor circuit monitors the receiver to insure that the beam is continuously received when the elevator car is outside of the terminal zone, and to insure that the receiver detects the spaced markers as the elevator car approaches a terminal floor in the terminal zone. The monitor circuit initiates a procedure which takes the elevator car out of service in the event a malfunction in the terminal slowdown control is detected.

REFERENCES:
patent: 3474886 (1969-10-01), Iordanidis
patent: 3779346 (1973-12-01), Winkler

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