Apparatus for sensing the closure of a door

Details Apparatus for sensing the closure of a door Apparatus for sensing the closure of a door

1994-10-16

1996-07-30

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

335207, H01H 900

Patent

active

055415628

ABSTRACT:
An enclosure sensing apparatus is provided which monitors the movement of a key structure relative to a housing structure. The purpose of the device is to determine that a moveable object has moved into an appropriate position relative to a stationary object. First, second and third magnetically sensitive devices are provided within a housing structure. First and second magnets are attached to a key structure that is moveable relative to the housing structure and a third magnet is provided within the housing structure to advantageously affect the operation of the second magnetically sensitive device. Several positions of the key structure can be specifically identified as the key structure passes through a path provided within the housing structure. In addition, a latching mechanism is provided to lock the relative position of the key structure and the housing structure when the key structure has reached a preselect position relative to the housing structure.

REFERENCES:
patent: 4199741 (1980-04-01), Serrus Paulet
patent: 4210889 (1980-07-01), Holce
patent: 4319712 (1982-03-01), Bar
patent: 4349814 (1982-09-01), Akehurst
patent: 4580062 (1986-04-01), MacLaughlin
patent: 4812674 (1989-03-01), Sue et al.
patent: 4945340 (1990-07-01), Brill
patent: 5233323 (1993-08-01), Burkett et al.

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