Sewing – Elements – Starting or stopping
Patent
1982-08-25
1985-05-07
Reynolds, Wm. Carter
Sewing
Elements
Starting or stopping
112276, 112221, D05B 6922, D05B 6916, D05B 6908, D05B 5514
Patent
active
045150982
ABSTRACT:
A device for driving a sewing machine which includes a main shaft driven by a positioning motor that can be stopped in at least one predetermined position and then returned back to a second predetermined position, comprises a coupling disc which can be moved into engagement with a drive disc associated with the motor and a main shaft to drive the main shaft in a direction opposite to its normal direction of operation as determined by the positioning motor. The coupling disc is provided with cam surfaces with a cam engaging surface provided on a supporting member which is biased toward the disc by a predetermined tension. An actuator is connected to the support for rotating the actuator. The initial rotation moves the coupling disc into engagement with the driver disc which is connected to the main shaft, and the further rotation of the support rotates both the coupling and main shaft by a predetermined amount. A predetermined positioning of the actuator determines the amount of rotation of the coupling disc and therefore the main shaft.
REFERENCES:
patent: 1850708 (1932-03-01), Davis
patent: 2159722 (1939-05-01), Bedard
patent: 2969755 (1961-01-01), Reece
patent: 3026835 (1962-03-01), Hall
patent: 3170425 (1965-02-01), Becker
Pfaff Industriemaschinen GmbH
Reynolds Wm. Carter
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