Clamp for a buttonhole sewing machine

Details Clamp for a buttonhole sewing machine Clamp for a buttonhole sewing machine

1996-02-21

1997-04-15

Izaguirre, Ismael

Sewing

Special machines

Buttonhole

D05B 306

Patent

active

056199414

ABSTRACT:
A clamp for a buttonhole sewing machine includes two curved cantilevered arms which arch forward and downward to parallel feet portion. The clamp is supported on an extension of a movable clamping plate and moves with the clamping plate. A lever compresses a spring, pushing the clamp into firm engagement with the workpiece on the movable clamping plate. A detent holds the spring compressed and the clamp engaged until the end of the cycle, when the detent is released and the spring pushes the clamp upward so that the workpiece may be moved.

REFERENCES:
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patent: 1197639 (1916-09-01), Kiewicz
patent: 1265382 (1918-05-01), Ray
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patent: 1739059 (1929-12-01), Carlson
patent: 1823522 (1931-09-01), Allen
patent: 2040260 (1936-05-01), Kenny
patent: 2510014 (1950-05-01), Faulkner
patent: 2963999 (1960-12-01), Braun et al.
patent: 2986105 (1961-05-01), Maxant
patent: 3039410 (1962-06-01), Graham et al.
patent: 3847101 (1974-11-01), Tolle
patent: 4181083 (1980-01-01), Bajer et al.
patent: 4549492 (1985-10-01), Albrecht et al.

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