Precision non-contact digital switch

Details Precision non-contact digital switch Precision non-contact digital switch

2006-03-28

2006-03-28

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

Plural magnets

C335S205000

Reexamination Certificate

active

07019607

ABSTRACT:
A switch apparatus, system and method are disclosed herein, including one or more magnetic sensing elements that follow a travel path thereof, and a plurality of permanent magnets located in a mirrored configuration about the travel path. Such a configuration permits a magnetic field variation associated with the permanent magnets and the magnetic sensing element to be reduced with respect to the magnetic sensing element and the permanent magnets position tolerances, thereby generating a reduced magnetic field variation thereof which improves switching accuracy. A signal processing module can also be provided, which includes a signal conditioning circuit associated with a microprocessor.

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patent: 2003/0122641 (2003-07-01), Luetzow
patent: 2004/0095218 (2004-05-01), Wan et al.

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