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:
Sep. 11, 1984
Filed:
Apr. 28, 1981
Applicant:
Inventor:
Henning Wolf, N/u/ rtingen, DE;
Assignee:
Festo-Maschinenfabrik Gottlieb Stoll, Esslingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; H01L / ;
U.S. Cl.
CPC ...
324208 ; 324251 ; 338 / ;
Abstract
For producing readings representative of the position of a fluid-powered actuator, a magnetic position-sensing system is used which is out of contact with the actuator's ram and is completely united with the actuator's cylinder. The sensing system has a periodic magnetic field pattern of the ram itself and a number of magnetic field detectors placed in an end plate of the actuator clear of the ram's outer face. The true position of the ram within one period of the magnetization pattern is measured by electrical interpolation based on output signals of the different magnetic field detectors.