Buttonhole cam unit with ball bearing clutch

Details Buttonhole cam unit with ball bearing clutch Buttonhole cam unit with ball bearing clutch

1977-12-12

1978-11-21

Schroeder, Werner H.

Sewing

Work manipulating

Guides

192 24, D05B 306, F16D 1104

Patent

active

041260988

ABSTRACT:
A zig-zag sewing machine is disclosed which can be controlled by various special cam units for producing special patterns of zig-zag stitches, zig-zag stitch patterns combined with patterned work feed control, or closed stitch groups such as buttonholes. A cam unit for buttonholing is also disclosed in which a clutch is used for selective engagement of the cam unit. This clutch uses axially shiftable ball bearings for selectively engaging notches in a driving plate, coupling the driving plate to the rest of the buttonhole cam unit.

REFERENCES:
patent: 503311 (1893-08-01), Dahl
patent: 2299621 (1942-10-01), Giffen et al.
patent: 2506750 (1950-05-01), Surprenant
patent: 2983240 (1961-05-01), Engel
patent: 3244263 (1966-04-01), Fleming
patent: 3585876 (1971-06-01), Marsh
patent: 3795208 (1974-03-01), Tolle
patent: 3841246 (1974-10-01), Casner et al.

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