Inductive detector with variable width loops on first and...

Details Inductive detector with variable width loops on first and... Inductive detector with variable width loops on first and...

2011-04-26

2011-04-26

Patidar, Jay M (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240

Reexamination Certificate

active

07932715

ABSTRACT:
An inductive detector operable to measure relative displacement along a measurement path of a first body including an electrical intermediate device and a second body including at least three windings. At least one winding is a transmit winding and at least one other is a receive winding. The windings are arranged such that relative displacement of the two bodies causes a change in inductive coupling between at least one transmit winding and at least one receive winding. At least two windings are formed by a convoluted conductor with a first portion extending along the measurement path on a first surface of the substrate and a second portion returning back along the measurement path on an opposite second surface of the substrate. The first and second portions are connected via a connection extending between the first and second surfaces. Each convoluted conductor forms a series of loops defined between the portions on the first and second surfaces, the width of each loop varying along the measurement path and adjacent loops having opposite electromagnetic polarity. At least two windings are spaced in an axis normal to the measurement path.

REFERENCES:
patent: 4737698 (1988-04-01), McMullin et al.
patent: 6011389 (2000-01-01), Masreliez et al.
patent: 7196510 (2007-03-01), Kawatoko
patent: 2002/0043972 (2002-04-01), Irle et al.
patent: 2 394 293 (2004-04-01), None
International Search Report for corresponding Application No. GB2005/004854.

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