Differential magnetic alignment of an elevator and a landing

Details Differential magnetic alignment of an elevator and a landing Differential magnetic alignment of an elevator and a landing

1996-12-13

1998-11-03

Nappi, Robert E.

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

187390, 187291, B66B 134, B66B 300

Patent

active

058312277

ABSTRACT:
An apparatus for determining if an elevator car is level with respect to a landing comprises: a first magnet disposed proximate to the landing; a second magnet disposed proximate to the landing; a sensor for providing a level signal in response to detecting a minimum flux region formed by the first and second magnets; and a processor for determining if the elevator is level with respect to the landing in response to the level signal. Each magnet has a first and second magnetic pole. The first and second magnets are adjacently aligned such that the first magnetic pole of the first magnet is adjacent to the first magnetic pole of the second magnet, and the second magnetic pole of the first magnet is adjacent to the second magnetic pole of the second magnet.

REFERENCES:
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patent: 1680675 (1928-08-01), Gale
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patent: 5509505 (1996-04-01), Steger et al.
patent: 5677519 (1997-10-01), Herkel et al.

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