Thread-tensioning device for a bobbin housing

Details Thread-tensioning device for a bobbin housing Thread-tensioning device for a bobbin housing

1986-10-21

1987-07-14

Hunter, H. Hampton

Sewing

Elements

Revolving hooks

2421561, 112231, D05B 5714

Patent

active

046795138

ABSTRACT:
A thread-tensioning device for being mounted on a bobbin housing, the bobbin housing having an upper part and a lower part which define a space for receiving a bobbin, and a jacket for substantially surrounding the bobbin. The thread-tensioning device includes a thread-tensioning member, such as a lever, having a first end swingably supported on the upper part of the housing, and a second end comprising a finger for bearing on the thread package on the bobbin. A central part of the lever is received by a slot in the jacket of the bobbin housing. A leaf spring bears upon the lever to urge the finger toward the interior of the bobbin-receiving space and against the thread package. The arrangement produces a detaining force and a braking force which combine to result in a relatively constant thread-tensioning force.

REFERENCES:
patent: 2299524 (1942-10-01), Chason
patent: 2949874 (1960-08-01), Kuhar
patent: 2973920 (1961-03-01), Kucmerosky
patent: 3051108 (1962-08-01), Ketterer
patent: 3568616 (1971-03-01), Coulomba
patent: 3595497 (1971-07-01), Boatright
patent: 4009670 (1977-03-01), Mitchell
patent: 4235178 (1980-11-01), Ackermann
patent: 4331090 (1982-05-01), Hanyu et al.

Affiliated with

Also associated with

Rating

Thread-tensioning device for a bobbin housing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thread-tensioning device for a bobbin housing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thread-tensioning device for a bobbin housing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1421701