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. 24, 1982
Filed:
Mar. 10, 1980
Yves Derail, Roanne, FR;
ASA S.A., , FR;
Abstract
An apparatus is disclosed for the variable speed control of cams in a textile machine to provide for high speed winding of thread on spools which are controlled by the cams. A motor drives each cam. The speed of each motor is varied according to a predetermined cycle to produce a staggering of the thread on the spools from one layer to the other and to avoid the formation of bunches on the formed winding. The motors have a common induction supply which establishes the motors average speed and which operates to exchange the braking energy of the motors The driving energy applied to the motors is modulated in opposite phase in order to achieve variations around the average speed of the motors by inductively varying the flux of the motor windings.