The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 1999
Filed:
Jul. 25, 1996
Applicant:
Inventors:
Lisa Brackenbury Maurice, Jericho, VT (US);
Robert Downing LaClair, Richmond, VT (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G02F / ; G02B / ;
U.S. Cl.
CPC ...
32420713 ; 32420724 ; 32420725 ; 3242441 ; 324 96 ; 25022717 ;
Abstract
Apparatus for detecting relative displacement includes a first magnet for producing a first magnetic field along an axis; a second magnet for producing a second magnetic field along the axis; the first and second magnetic fields interacting to produce a position-dependent magnetic field along the axis; a sensor disposed for detecting the position-dependent magnetic field; and a movable element for causing relative displacement between the position-dependent magnetic field and the sensor. In a preferred embodiment, the sensor is a magneto-optic sensor.