Sewing – Elements – Driving mechanisms
Patent
1997-09-30
1999-02-16
Izaguirre, Ismael
Sewing
Elements
Driving mechanisms
112467, D05B 6916, D05B 5732
Patent
active
058709606
ABSTRACT:
A looptaker driving arrangement in a zig-zag sewing machine includes: a rotatable drive shaft driving rotation of the looptaker of the sewing machine; a main drive member rotatably supported on the drive shaft; a secondary drive member fixed on the drive shaft for concurrent rotation therewith; a bushing rotatably mounted on the drive shaft with an eccentric outer periphery; and a coupling member rotatably mounted on the periphery of the bushing in eccentric relation to the drive shaft and engaging the main drive member and the secondary drive member. Rotation of the main drive member about the drive shaft axis combined with rotation of the bushing about the drive shaft axis relative to the main drive member angularly accelerates and decelerates the secondary drive member with respect to the main drive member and, in turn, angularly accelerates and decelerates the drive shaft. A gear arrangement provided for driving rotation of the bushing about the drive shaft axis relative to the main drive member includes: a first gear fixed to the drive shaft; a pair of connected gears rotatably mounted to the sewing machine; and a second gear fixedly connected to the bushing and rotatably supported on the drive shaft in coaxial relation thereto. The first gear meshingly engages a first one of the pair of gears and the second gear meshingly engages a second one of the pair of gears, whereby rotation of the drive shaft rotates the bushing about the drive shaft axis relative to the main drive member.
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Capel Incorporated
Izaguirre Ismael
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