Sewing machine drive assembly, including pulley belt traction en

Details Sewing machine drive assembly, including pulley belt traction en Sewing machine drive assembly, including pulley belt traction en

1990-06-06

1991-11-26

Schroeder, Werner H.

Sewing

Elements

Driving mechanisms

474134, D05B 6912, F16H 712

Patent

active

050674234

ABSTRACT:
A sewing machine drive assembly having one or more pulleys and drive belts also includes a mechanism for enhancing traction between a belt and a pulley to resist slippage under maximum power to be coupled through the drive assembly from a motor to the crankshaft of the sewing machine. The traction enhancing mechanism includes a support member and belt engagement members connected to the support member at respective locations so that the belt mounted on the pulley with which the mechanism is associated is deflected inwardly.

REFERENCES:
patent: 1386632 (1921-08-01), Kornas
patent: 2152038 (1939-03-01), Gettys
patent: 2633092 (1953-03-01), Robert et al.
patent: 2739552 (1956-03-01), Sailer
patent: 2883869 (1959-04-01), Schenkengel
patent: 2995380 (1961-08-01), King
patent: 3186003 (1965-05-01), Gregory et al.
patent: 4416647 (1983-11-01), White
patent: 4758208 (1988-07-01), Bartos et al.
patent: 4798564 (1989-01-01), Benedict
patent: 4934989 (1990-06-01), Furukawa et al.

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