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:
Aug. 25, 1992
Filed:
Oct. 29, 1990
Applicant:
Inventors:
Guenter Gerlach, Rastatt, DE;
Erich Zabler, Stutensee, DE;
Georg Riedel, Karlsruhe, DE;
Walter Antoni, Rulzheim, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01P / ; G01L / ;
U.S. Cl.
CPC ...
32420721 ; 7351 / ; 73728 ; 32420712 ; 32420723 ; 32420724 ; 32420725 ;
Abstract
An apparatus for measuring small displacements, either linear or angular, employ a pair of spaced 'barber pole' or other magnetic field sensitive elements and a movable magnet, in which the exact position of the movable magnet is determined from the voltages sensed at the two elements. The voltages are evaluated in a circuit which produces a rectangular voltage or equivalent, in which the mark/space ratio equates to the position of the magnet between the two sensors.