Elevator/hatch controller platform leveling logic with safety fe

Details Elevator/hatch controller platform leveling logic with safety fe Elevator/hatch controller platform leveling logic with safety fe

1983-03-24

1984-12-11

Dobeck, B.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

340 19R, 340 20, 340 21, B66B 118

Patent

active

044872933

ABSTRACT:
An elevator levelling/hatch control circuit including a motor controller, elevator dispatching unit, an elevator location sensing unit, and a control unit. The control unit receives hatch position signals, monitors the speed and direction of elevator motion and generates hatch open/close commands and elevator speed and direction commands to assure safe elevator operation in a shipboard environment. In one embodiment the circuit utilizes miniature electromechanical relays that may be visually monitored and easily tested.

REFERENCES:
patent: Re29543 (1978-02-01), Glaser
patent: 3581915 (1971-06-01), Saul
patent: 3625311 (1971-12-01), Nowak
patent: 3857465 (1974-12-01), Iwasaka et al.
patent: 4304319 (1981-12-01), Radke

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