Sewing – Stitch forming – Feeding work material
Patent
1983-08-25
1984-11-06
Schroeder, Werner H.
Sewing
Stitch forming
Feeding work material
112236, D05B 2720, D05B 302
Patent
active
044805667
ABSTRACT:
A presser attachment device for implementing needle feed in which a presser foot is elevated when a sewing needle is in engagement with work material to facilitate lateral shift thereof by the sewing needle. The presser foot is supported on one end of a substantially centrally pivoted presser foot carrier lever, the other end of which is formed with a gear segment. A pinion and ratchet combination is supported on one end of a pinion carrier lever, the other end of which is carried on the presser foot carrier lever pivot and has a pinion portion thereof in engagement with the gear segment. A combined cam and pawl is provided in which a pawl portion is in engagement with a ratchet portion of the combined pinion and ratchet when the sewing needle extends through the work material so as to lock the pinion against further rotation, depress the pinion and rotate the presser foot carrier lever to elevate the presser foot out of contact with the work material. When the sewing needle is not in engagement with the work material, the pinion is free to rotate to accommodate to the thickness of the work material beneath the presser foot.
REFERENCES:
patent: 521855 (1894-06-01), Gohring
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patent: 2874664 (1959-02-01), Waterman
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patent: 4372237 (1983-02-01), Totino et al.
U.S. Pat. Ser. No. 526,228, Aug. 25, 1983, J. J. Lukawich.
Adams Kenneth D.
Lukawich Joseph J.
Bell Edward L.
Falik Andrew M.
Schmidt Edward P.
Schroeder Werner H.
Smith Robert E.
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