Spooling device for sewing machines

Details Spooling device for sewing machines Spooling device for sewing machines

1985-01-28

1986-08-19

Schroeder, Werner H.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 39, 242 49, 112279, B65H 6308, D05B 5900

Patent

active

046065075

ABSTRACT:
The winder shaft for a sewing machine, fashioned as a support for a thread bobbin, is positioned directly on the shaft of a low-voltage motor, independent of the drive motor for the sewing mechanism of the sewing machine. An on/off switch for this motor is operable by means of a three-armed switching lever, with the first arm being adapted to scan the package of wound thread forming on the bobbin. A trigger cam disposed on the third arm slides, during this operation, over a first surface of a spring-biased dual ramp. Once the thread bobbin is full, the trigger cam surpasses the apex of the dual ramp, and the switching lever flips into a disconnect position and cuts off the motor by way of a switching cam disposed on the second arm. All of the elements of the spooling device are mounted to a common support so that the spooling device, which is independent of the drive mechanism of the sewing machine, can be attached as a composite unit at any desired location on the sewing machine.

REFERENCES:
patent: 935263 (1909-09-01), Chapelle
patent: 2255152 (1941-09-01), Colegrove
patent: 4096812 (1978-06-01), Gegauf
patent: 4259914 (1981-04-01), Johnson
Russian document #587184; Jan. 3, 1978, shts. drawings:2; pp. spec. 2.

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