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:
Sep. 07, 1976
Filed:
May. 01, 1975
Robert C Ruhl, Cleveland Heights, OH (US);
James E Johnson, Southfield, MI (US);
Chase Brass and Copper Co., Inc., Cleveland, OH (US);
Abstract
Level winding is accomplished by rotating a reel with sufficient torque to wind material on the reel while traversing the reel a predetermined precise fractional part of the width of the material wound for each increment of revolution of the reel so that the reel is traversed precisely the width of the material wound plus a precise space between adjacent turns, if desired, during each revolution of the reel. Pulses indicative of the extent of rotation of the reel are transformed, by dividing, into pulses indicative of both the extent of rotation of the reel and the desired distance between centers of adjacent turns of the material wound onto the reel. The pulses rotate a first synchrotransducer electrically connected to a second synchrotransducer which is driven in response to traverse of the reel. An error signal resulting from any non-synchronism of the synchrotransducers is used to operate a servo-valve which changes the rate of traverse in a direction to reduce the error signal.