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:
Dec. 07, 1976
Filed:
May. 30, 1975
Henry Kristiansen, Sachseln, CH;
Interelectric Aktiengesellschaft, Sachseln, OW, CH;
Abstract
A method of winding a tubular-shaped multilayer coil usable as an ironless rotor for electrical motors. A cylindrical form having a rhomboidal cross-section is used as a core for making a cylindrical winding having a number of taps intended to be connected to a commutator of a slip ring device. The cylindrical winding is stripped off from the cylindrical form and flattened to a bandlike structure without deforming the configuration of the windings. The bandlike structure is bent and the ends thereof are joined to form a tubular-shaped coil usable as an ironless rotor. The wire is wound on the cylindrical core in a multilayer formation by alternating the direction of axial advancement or displacement of the windings so as to form a cylindrical winding having a thickness of at least three times that of the diameter of the insulated wire.