Basting stitch mechanism
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United States of America Patent
Stats
-
Jun 5, 1984
Grant Date -
N/A
app pub date -
Apr 19, 1982
filing date -
Apr 19, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A basting stitch mechanism in which a latch is carried on the side of the needle bar carrier and is fashioned with a front portion extending in front of the needle bar terminating in a wedge, which wedge fits into a notch in a driving stud hinge pin extending about the needle bar and slidable thereon. The latch wedge connection to the driving stud eliminates the requirement for establishing a clearance between the needle bar carrier and the driving stud carrying the driving stud hinge pin. An extension spring connected between the sewing machine frame and a rear portion of the latch operates to increase the latching force as the needle bar is moved downwardly. By proper design of the wedge on the latch and the notch on the driving stud hinge pin, separation of the driving stud hinge pin from the latch may take place at some force designed to avoid breakage of the sewing needle.
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Family
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Cited Art Landscape
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