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, 1981
Filed:
Jul. 12, 1979
Adolfo M Guzman, Boulder, CO (US);
Howard E Van Winkle, Boulder, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A stepping motor mechanism for a rotary device in which one member is indexed linearly and/or rotationally relative to a second rotating member. The indexing member includes at least one portion with a series of equi-distantly spaced ridges and the rotating member includes at least three ferromagnetic members adapted to rotate with the rotating member and spaced from one another, each of the ferromagnetic portions having defined thereon ridges complementary to the ridges on the indexing member but angularly or linearly displaced from one another. A fixed coil and coil carrier is positioned spaced from but adjacent to the ferromagnetic members such that as current is applied to the coils, a magnetic field is induced in the coil carrier and adjacent rotating ferromagnetic member thereby causing the ridges on the adjacent ferromagnetic member to align with the ridges defined on the rotating member.