Sewing machine with buttonhole stitching mechanism

Sewing – Work manipulating – Guides

Patent

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Details

D05B 306

Patent

active

043924417

ABSTRACT:
A sewing machine which has a stitch-producing arrangement mounted on a housing and including a feeding device for selectively feeding the material to be sewn in one of two opposite feeding directions, and a needle reciprocable through the material and swingable transversely of the feeding directions when operated by a drive, comprises a stitch pattern control arrangement. The control arrangement includes a plurality of pattern cams rotated by the drive, a plurality of operator-controlled pattern selecting elements movable between operative and inoperative positions and a plurality of cam followers acted on by the selecting elements to engage the associated pattern cams in the operative position of the respective selecting element. A holder which holds the respective selecting element in its operative position and a feed adjusting arrangement which changes the feeding direction and discontinues the operation of the feeding device in dependence on which of the selecting elements is in its operative position are provided in the control arrangement. An operator-controlled needle-swing amplitude adjusting device is further provided, which is biased toward a first position and can be moved to a second position to displace the needle into a predetermined position and to cause the holder to release the respective selecting element then held thereby. The amplitude adjusting arrangement may include two cams one of which controls the displacement of the needle and the other the release of the holder.

REFERENCES:
patent: 3075483 (1963-01-01), Engel
patent: 3254618 (1966-06-01), Eguchi

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