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:
Nov. 16, 1976
Filed:
Jun. 02, 1972
Applicant:
Inventors:
Robert J Moran, Littleton, MA (US);
Louis P Marsilia, East Boston, MA (US);
Assignee:
Clinton Industries, Inc., Hackensack, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D05B / ; H02P / ;
U.S. Cl.
CPC ...
1122 / ; 318269 ; 1122 / ;
Abstract
A direct motor drive system for a sewing machine wherein a low-inertia direct current motor coupled directly to the drive shaft is excited by a low impedence source of variable direct current voltage derived from a rectified alternating current signal at a manually controllable autotransformer. A needle-positioning circuit senses the needle position and either pulses or brakes the motor electrically so that the needle moves to a selected up or down position.