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:
Jul. 14, 1981
Filed:
Jul. 20, 1979
Applicant:
Inventors:
Hermann Landgraf, Heppenheim, DE;
Juergen Wohlgemuth, Darmstadt, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ;
U.S. Cl.
CPC ...
310191 ; 310 47 ; 310154 ;
Abstract
For adjusting the rpm with the assistance of mechanical regulators consisting of low-retentivity magnetic material, the air gap between the rotor and the stator, and/or the magnetic return between the stator field poles of opposite polarity, and/or a magnetic shunt is adjusted. The illustrative embodiments are particularly provided for d.c. subfractional horsepower motors for the drive of dental tools.