Device for a sewing machine having a zigzag stitching mechanism

Details Device for a sewing machine having a zigzag stitching mechanism Device for a sewing machine having a zigzag stitching mechanism

1989-11-27

1991-09-17

Schroeder, Werner H.

Sewing

Stitch forming

Convertible

112103, 112465, D05B 700, D05B 300

Patent

active

050484354

ABSTRACT:
A switching device is provided for a sewing machine for switching operation of the sewing machine from a zigzag stitching to embroidering or vice versa. The switching device comprises a rotatable disc fixedly mounted on an output shaft of a stepping motor and a sliding member that movably connects one end of a transmission rod via a pin, the other end of which is connected to a needle bar supporter or a fabric feed device, with the rotatable disc so that the one end of the transmission rod is movable between a first position on the rotatable disc which coincides with the center of rotation of the rotatable disc, and a second position on the rotatable disc which is spaced apart from the center of rotation of the rotatable disc. The switching device further comprises a stopper that engages a stub projecting from the transmission rod, in the first position of the one end of the transmission rod on the rotatable disc, and a mechanism for converting rotational movement of the stepping motor output shaft to movement of an embroidering frame in an X- or a Y-directions, dependent on whether the other end of the transmission rod is connected to the needle bar supporter or the fabric feed device, respectively, when the stopper engages the stub.

REFERENCES:
patent: Re24370 (1957-10-01), Harris
patent: 3096737 (1963-07-01), Bono
patent: 4135462 (1979-01-01), Brown
patent: 4159003 (1979-06-01), Johnson et al.
patent: 4164192 (1979-08-01), Herr et al.
patent: 4195581 (1980-04-01), Ohara
patent: 4386573 (1983-06-01), Davidson et al.

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