Device for unwinding thread and bobbin used therewith

Details Device for unwinding thread and bobbin used therewith Device for unwinding thread and bobbin used therewith

1974-09-06

1976-06-01

Hunter, H. Hampton

Sewing

Elements

Revolving hooks

242131, 242137, D05B 5714, B65H 4918

Patent

active

039600890

ABSTRACT:
There is described a device for unwindng thread by means of which the bobbin can easily rotate about the pin when a pull is exerted on the thread, but which stops the bobbin very rapidly when said pull on the thread stops, in such a way that the thread is thus no more unwound. The cross-section of the pin when considered at a right angle to the lenthwise direction thereof and the inner cross-section of the bobbin sleeve, also as considered at a right angle to the lengthwise direction thereof, at least where the sleeve and the pin engage one another, are so selected as to make possible a sidewise movement of the bobbin relating to the pin and at least where the sleeve and the pin engage one another, the one cross-section is circular while the other cross-section has a shape which is substantially different from a circular shape.

REFERENCES:
patent: 2509333 (1950-05-01), Burlingame
patent: 2555658 (1951-06-01), Ritter
patent: 2690726 (1954-10-01), Wener
patent: 3716204 (1973-02-01), Klingbeil

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