Sewing machine dual mode backtack control

Details Sewing machine dual mode backtack control Sewing machine dual mode backtack control

1978-02-28

1979-04-03

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

112158E, 11212111, D05B 2700, D05B 302, D05B 6918

Patent

active

041471199

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.

REFERENCES:
patent: 3977338 (1976-08-01), Wurst et al.
patent: 4080914 (1978-03-01), Ishida et al.

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