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:
Jan. 01, 1985
Filed:
Dec. 14, 1982
Walter Hager, Kaiserslautern, DE;
Abstract
A sewing machine is with a device for producing corner seams comprising a sensor which is located ahead of the needle and which releases the operation of stopping the needle at a predetermined corner point as soon as an edge of the work passes by. To exactly control the sticking in of the needle at a predetermined corner location, a pulse generator for delivering counting pulses and coupled to the main shaft of the sewing machine, is connected through a switching element to a setting counter, and is effective only during the advance phases of the feed dog motion. In addition, the sensor is connected to the switching element to switch it on as soon as the oblique edge of the work passes by, and the setting counter is connected to a device for instantly stopping the advancing effect of the feed dog, and to a device for stopping the sewing machine in the lowermost position of the needle, to release the operation of these devices as soon as a presettable number of pulses is reached. To instantly stop the advancing effect of the feed dog, the feed dog is connected to its lifting drive through a toggle lever which can be swung out by means of an actuating member controlled by the setting counter.