Sewing – Elements – Lubricating
Patent
1977-03-24
1978-02-14
Krizmanich, George H.
Sewing
Elements
Lubricating
D05B 7100
Patent
active
040732517
ABSTRACT:
A lubricating arrangement for the raceway of the bobbin case of a rotary sewing machine looptaker having a body with a recess formed by a bottom and a substantially cylindrical sidewall for holding the bobbin case. A hub of the looptaker has an oil collecting chamber in the form of an annular cavity with undercut inside peripheral area. The chamber receives oil supplied from an oil collecting sump. Centrifugal action causes the oil to flow through a conduit located between the oil collecting chamber and the bottom of the recess, via an adjusting device, to the raceway for the bobbin case. For regulating the oil delivery, the conduit is surrounded along a portion of its length by a borehole located in the bottom. An adjusting screw is provided for tilting the conduit in relation to the axis of the loop taker. An oil collecting sump closed by a cover, is in the bottom of the looptaker body. Oil is supplied to the oil collecting sump through a hollow looptaker shaft. The oil collecting sump has a sidewall tapering towards the bottom of the recess, and an oil line extends from the oil collecting sump outward to the oil collecting chamber for delivering oil from the sump to the collecting chamber.
REFERENCES:
patent: 3146745 (1964-09-01), Schenkengel
patent: 3513794 (1970-05-01), Bernewasser
patent: 3773020 (1973-11-01), Schrudde
patent: 3955520 (1976-05-01), Gebhardt
Fogiel Max
Kochs Adler AG
Krizmanich George H.
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