Thread winding safety device of a sewing machine

Details Thread winding safety device of a sewing machine Thread winding safety device of a sewing machine

1985-07-31

1987-05-26

Nerbun, Peter

Sewing

Elements

Starting or stopping

112279, 112453, D05B 6936, D05B 5900

Patent

active

046676120

ABSTRACT:
In the invention, the sewing machine carries out winding of the thread by operating separately a thread winding mechanism and a clutch mechanism. A speed detector is provided to measure actual rotary speed of a mechanism which is related with rotation of an upper shaft. If the thread winding were carried out, while said mechanism is left as engaged with a power source of the sewing machine, the speed detector would detect the rotation of said mechanism to stop a machine motor instantaneously, so that the thread winding cannot be performed when said relative mechansim is not released from the power source, and the needle bar is not actuated at winding the thread for safety in operation.

REFERENCES:
patent: 4195585 (1980-04-01), Takahashi et al.
patent: 4519328 (1985-05-01), Takenoya et al.
patent: 4527496 (1985-07-01), Kemmel

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