Position sensing device

Details Position sensing device Position sensing device

1999-08-10

2001-08-14

Oda, Christine (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240, C324S207260, C280S735000

Reexamination Certificate

active

06275026

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a device for sensing a relative position of parts which are movable relative to each other.
BACKGROUND OF THE INVENTION
It is often desirable to determine a relative position of parts which are movable relative to each other. In order to achieve this purpose, numerous position sensing devices have been developed. Known position sensing devices utilize limit switches, ultrasonic sensors, infrared sensors, microwave sensors or a combination of various sensing devices to detect a relative position of parts which are movable relative to each other.
SUMMARY OF THE INVENTION
A device for sensing a predetermined relative position of first and second parts which are movable relative to each other includes a magnet which creates a magnetic field and a pivotal lever which has first and second opposite surfaces. The lever has a first position in the magnetic field wherein the first surface has a first magnetic polarity and the second surface has a magnetic polarity opposite the first magnetic polarity. The lever has a second position in the magnetic field when the first and second parts are in the predetermined relative position.
The first and second surfaces move away from the magnet as the lever pivots from the first position to the second position. The first magnetic polarity of the first surface switches to an opposite second magnetic polarity when the lever is in the second position, and the second surface switches to a magnetic polarity opposite the second magnetic polarity when the lever is in the second position. The device also includes a Hall effect device which responds to the change in magnetic polarity from the first magnetic polarity to the second magnetic polarity.


REFERENCES:
patent: 2927627 (1960-03-01), Lohr
patent: 2982335 (1961-05-01), Garvey
patent: 2983545 (1961-05-01), Garvey et al.
patent: 3059960 (1962-10-01), Komorowski et al.
patent: 3183314 (1965-05-01), Pickles
patent: 3657687 (1972-04-01), Kobayashi
patent: 4204255 (1980-05-01), Cremer
patent: 4853629 (1989-08-01), Rops
patent: 4909560 (1990-03-01), Ginn
patent: 4970463 (1990-11-01), Wolf et al.
patent: 5029304 (1991-07-01), Tolmie, Jr.
patent: 5469054 (1995-11-01), Bicking
patent: 5493216 (1996-02-01), Asa
patent: 5542493 (1996-08-01), Jacobson et al.
patent: 5606255 (1997-02-01), Shimbo et al.
patent: 5608317 (1997-03-01), Hollmann
patent: 5742986 (1998-04-01), Corrion et al.
patent: 5803491 (1998-09-01), Barnes et al.
patent: 5977152 (1999-11-01), Schulz
patent: 6095555 (2000-08-01), Becker et al.
patent: 6113139 (2000-09-01), Heximer et al.

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