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:
Apr. 03, 1979
Filed:
Feb. 28, 1978
William H Dunn, Branchville, NJ (US);
The Singer Company, New York, NY (US);
Abstract
A dual mode backtack control system for a sewing machine is disclosed which permits an operator to select either a latched or non-latched backtacking mode of operation utilizing a single non-latching switch. The backtacking operation is initiated under operator command by closure of the switch. In the first mode of operation, the sewing machine is operating when the switch is closed, and the backtacking operation will continue only as long as the switch is held in the closed position. In the second mode of operation, the switch is closed before the machine commences the sewing operation, and the machine may then be operated in its backtacking mode without the operator maintaining the switch in its closed state. The backtacking mode may thereafter be terminated by a second momentary closure of the switch. An indicator lamp is provided to advise the operator when the machine is in the backtack mode.