Sewing – Stitch forming – Feeding work material
Patent
1985-11-14
1987-02-17
Schroeder, Werner H.
Sewing
Stitch forming
Feeding work material
112260, 112318, D05B 304
Patent
active
046431179
ABSTRACT:
A sewing machine includes a housing with a base portion having a covering base plate and an upright standard adjacent one end of the base portion extending above the base plate and an arm portion extending out of the standard and overlying the base plate. A feed drive in the housing includes a ratchet wheel driven by the feed drive located on the arm portion which cooperates with a shuttle carried in the base portion. The feed drive includes a variable drive including an eccentric which may be shifted so as to vary the driving speed of the shuttle. The construction includes a setting device for setting the speed of the shuttle, an actuating device connected to the setting device and the variable drive so that the drive of the shuttle may be varied. The base plate has an opening adjacent the standard with a holding plate pivotally mounted in the opening on an end of a two armed lever which is pivotally mounted in the base and which is effective to permit shifting of the pin actuator to vary the setting of an eccentric drive.
REFERENCES:
patent: 2491449 (1949-12-01), Hirsch
patent: 3176642 (1965-04-01), Love
patent: 3596619 (1971-08-01), Winberg
patent: 4095540 (1978-06-01), Kaltenbach et al.
patent: 4204493 (1980-05-01), Blackwood et al.
patent: 4512273 (1985-04-01), Skogward
Bungert Heinrich
Wentz Klaus
Falik Andrew M.
Pfaff Industriemaschinen GmbH
Schroeder Werner H.
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