Sewing – Elements – Starting or stopping
Patent
1977-02-17
1978-03-21
Hunter, H. Hampton
Sewing
Elements
Starting or stopping
112279, D05B 6922
Patent
active
040796868
ABSTRACT:
A sewing machine has a housing and a needle displaceable on the housing between a down position engaging through a workpiece and an up position disengaged therefrom. A drive is connected to a drive wheel rotatable on a drive shaft in the housing that in itself is operatively connected to the needle. A clutch including a clutch member on the shaft between the shaft and the wheel has a control element displaceable between an engaged position for rotationally coupling the wheel and the shaft and a disengaged position for free relative rotation of the wheel and the shaft. Thus in the engaged position of the clutch the drive can vertically reciprocate the needle between its up and down positions. A stopper member having an engaging part is mounted on the shaft and a stopper is mounted on the housing. The stopper is displaceable between an operative position engageable with the engaging part 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 the engaging part. A spring between the clutch member and the stopper member allows a relative angular movement thereof between a pair of angularly offset positions. Finally the control element can be displaced from the engaged to the disengaged position on engagement of the stopper in the operative position of the clutch with the engaging part of the stopper member so that the shaft can be arrested in the predetermined angular position corresponding to the needle up position and substantially simultaneously rotationally upcoupled from the wheel. A mechanism is provided for substantially simultaneously displacing the control element into the engaged position and the stopper into the inoperative position.
REFERENCES:
patent: 2969755 (1961-01-01), Reece
patent: 3058437 (1962-10-01), Iida
patent: 3108670 (1963-10-01), Habicht
patent: 3221850 (1965-12-01), Bacon
patent: 3253685 (1966-05-01), Marola et al.
patent: 3908568 (1975-09-01), Fugii
Hunter H. Hampton
Janome Sewing Machine Co. Ltd.
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