Sewing – Elements – Driving mechanisms
Patent
1982-04-19
1984-06-05
Schroeder, Werner H.
Sewing
Elements
Driving mechanisms
112220, D05B 6900
Patent
active
044521570
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.
REFERENCES:
patent: 3559601 (1971-02-01), Tullman
patent: 3779187 (1973-12-01), Adams
patent: 3782311 (1974-01-01), Adams et al.
patent: 3872809 (1975-03-01), Adams et al.
patent: 4129084 (1978-12-01), Kihara
patent: 4246855 (1981-01-01), Johnson
patent: 4325313 (1982-04-01), Kawai et al.
Cantada Edilberto
Spasiano Anthony D.
Bell Edward L.
Meyers Steven N.
Schmidt Edward P.
Schroeder Werner H.
Smith Robert E.
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