Ronald F Cox

US Patent:

56274653, May 6, 1997

Filed:

Oct 25, 1995

Appl. No.:

8/548108

Inventors:

Eugene D. Alfors - Rockford IL
Ronald G. Cox - Cedarville IL

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01B 730

US Classification:

3242072

Abstract:

An angular position sensor is provided with a rotatable magnetic structure that comprises a primary magnet and a secondary magnet. The primary and secondary magnets are adjusted in position relative to each other in order to achieve an adjustability of the gain and offset characteristic of an output signal from a magnetically sensitive component disposed within the magnetic field of the magnetic structure. The primary and secondary magnets are rigidly maintained in position relative to each other and disposed for rotation about an axis of rotation. Each magnet has a magnetic axis extending though its first and second magnetic poles. The two magnetic axes rotate within parallel planes that are each perpendicular to the axis of rotation of the magnetic structure. The gain characteristic of the output signal from the magnetically sensitive component can be advantageously affected by changing the linear distance between the first and second planes in which the first and second magnetic axes of the primary and secondary magnets rotate. The offset characteristic of the output signal from the magnetically sensitive component can be advantageously affected by changing the angular dimension between the first and second magnetic axes of the primary and secondary magnets.

US Patent:

56708750, Sep 23, 1997

Filed:

Mar 29, 1996

Appl. No.:

8/627760

Inventors:

Eugne D. Alfors - Rockford IL
Ronald G. Cox - Cedarville IL
Edward D. Hoffman - Freeport IL
Joseph K. Murdock - Freeport IL

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01B 714
G01R 3500

US Classification:

324202

Abstract:

An angular position sensor is provided with a rotatable magnet and first and second ferromagnetic pole pieces. The first ends of the ferromagnetic pole pieces are disposed on opposite sides of the rotatable permanent magnet and the second ends of the ferromagnetic pole pieces are arranged in overlapping association with a magnetically sensitive component disposed therebetween. First and second ferromagnetic inserts are provided which are movable with respect gaps between the permanent magnet and the first ends of the first and second pole pieces. By changing the relative positions between the first and second inserts and their respective gaps, the gain and offset of an output signal from the magnetically sensitive component can be altered to achieve predetermined characteristics.