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:
Apr. 14, 1998
Filed:
Dec. 21, 1995
Applicant:
Inventor:
Donald L Edberg, Irvine, CA (US);
Assignee:
McDonnell Douglas Corporation, Huntington Beach, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
364559 ; 335213 ; 25036303 ;
Abstract
A position sensor is structurally integrated within a wide-gap magnetic actuator. Being an integral structure, the sensor provides voltages representative of a relative shift in position of the actuator's armature and pole piece from the neutral or base position and represents the actual position between pole piece and armature. Suitably the position sensor includes a photosensitive surface in the shape of a circular disk that is attached to the actuator's paddle and a narrow beam light source which is attached to the actuator's pole piece and oriented to produce a small spot of light on the photosensitive surface.