Intermittent drive for sewing machine

Details Intermittent drive for sewing machine Intermittent drive for sewing machine

1976-03-24

1978-02-14

Hunter, H. Hampton

Sewing

Elements

Starting or stopping

112279, D05B 6922

Patent

active

040732509

ABSTRACT:
A sewing machine motor is connected to a drive wheel which can be connected via a clutch to a drive shaft that vertically reciprocates the sewing-machine needle. A cam on the shaft and a stopper on the housing are displaceable between an operative position engageable with each other for stopping rotation of the shaft in a predetermined angular position corresponding to the up position of the needle and an inoperative position unengageable with each other. A cam is provided for displacing the control element of the clutch from an engaged to a disengaged clutch position on engagement of the stopper in its operative position with the cam so that the shaft can be arrested in a predetermined angular position and is substantially simultaneously rotationally uncoupled from the wheel. Pawls engageable with a cam carried on the shaft serve to substantially simultaneously displace the clutch control element into the engaged position and the stopper into the inoperative position for starting-up of the sewing machine again after one intermittent-drive cycle.

REFERENCES:
patent: 2006500 (1935-07-01), Gridley
patent: 2214602 (1940-09-01), Arnold
patent: 2521943 (1950-09-01), Pitt
patent: 2906222 (1959-09-01), Ketterer et al.
patent: 3058437 (1962-10-01), Iida
patent: 3071090 (1963-01-01), Zeier
patent: 3108670 (1963-10-01), Habicht
patent: 3221850 (1965-12-01), Bacon

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