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. 14, 1990
Filed:
May. 25, 1989
Applicant:
Inventor:
Wilhelm Sturwald, Stuttgart, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01H / ; D01H / ;
U.S. Cl.
CPC ...
57 93 ; 57 97 ; 57100 ;
Abstract
In a ring spinning or ring twisting machine the spindles of which each have an asynchronous motor as drive means, and the auxiliary apparatus thereof are driven by at least one electric motor having variable rotational speed, and the ratio of the rotational speeds of the electric motor driving the auxiliary apparatus and the asynchronous motors remains constant, a reluctance motor is used to drive the auxiliary apparatus. Two converters are used which are controlled in such a manner that the speed ratio remains constant.