Modified thread control lever for a bobbin case

Details Modified thread control lever for a bobbin case Modified thread control lever for a bobbin case

1978-06-30

1982-12-28

Reynolds, W. C.

Sewing

Stitch forming

Revolving-hook type

112229, D05B 5714, D05B 5900

Patent

active

043655670

ABSTRACT:
A bobbin case for a lockstitch sewing machine is disclosed which contains a thread control lever so constructed to allow the bobbin to be manually threaded from any direction without incurring the possibility of snagging the bobbin thread between the wall of the bobbin case and the thread control lever. One extremity of the thread control lever is pivotally mounted in a race formed in the wall of the bobbin case. The free extremity of the thread control lever, which is spring biased toward the bobbin, is shaped to form an obtuse angle with the wall of the bobbin case. Bobbin thread is thereby prevented from snagging between the bobbin case wall and the thread control lever.

REFERENCES:
patent: 3138127 (1964-06-01), Ketterer
patent: 3154035 (1964-10-01), Edwards et al.
patent: 3303802 (1967-02-01), Crawford
patent: 3568616 (1971-03-01), Coulombe
patent: 4100866 (1978-07-01), Philips

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