Bobbin thread winder and sewing machine equipped therewith

Details Bobbin thread winder and sewing machine equipped therewith Bobbin thread winder and sewing machine equipped therewith

2011-03-15

2011-03-15

Izaguirre, Ismael (Department: 3765)

Sewing

Elements

Bobbin winding

Reexamination Certificate

active

07905189

ABSTRACT:
A bobbin thread winder for sewing machine includes a thread winding shaft to which a bobbin is detachably set, a thread winding shaft gear attached to the shaft and having a gear portion, a gear mounted integrally on a timing pulley so as to be mesh-engageable with the gear portion, and a torque limiter mechanism transmitting rotation of the shaft gear to the shaft when load exerted on the shaft is below a predetermined value. The mechanism cuts off transmission of shaft gear rotation so that the shaft gear rotation is prevented from transmission to the shaft when the load is not less than the value. The mechanism includes a closely wound portion on a shaft periphery and a coil spring engaged with the shaft gear. The shaft gear rotation is transmitted to the shaft by frictional force of the closely wound portion when the load is below the value.

REFERENCES:
patent: 1210643 (1917-01-01), Hayes
patent: 1848352 (1932-03-01), Kelso
patent: 2056829 (1936-10-01), Colegrove et al.
patent: 2432138 (1947-12-01), Colegrove
patent: 2836371 (1958-05-01), Ayres
patent: 4073250 (1978-02-01), Kasuga
patent: 4161153 (1979-07-01), Nawa et al.
patent: 5816512 (1998-10-01), Nakashima et al.
patent: A-04-132591 (1992-05-01), None
patent: A-09-112568 (1997-05-01), None
patent: A-09-313763 (1997-12-01), None
patent: A-11-257368 (1999-09-01), None
patent: A-2000-045614 (2000-02-01), None

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