Freely revolving looper for double lockstitch sewing machines

Details Freely revolving looper for double lockstitch sewing machines Freely revolving looper for double lockstitch sewing machines

1983-11-18

1986-02-25

Reynolds, Wm. Carter

Sewing

Elements

Revolving hooks

112231, D05B 5726

Patent

active

045720916

ABSTRACT:
A rotary hook for a sewing machine has a rotatable hook drive shaft driving a hook body in cooperation with a reciprocating needle which moves toward and away from the rotary hook. The hook body has a revolving rotary hook tip which is movable in a path relative to the needle and is engageable with the thread presented by the needle. The rotary hook includes a thread deflecting shoulder to enlarge the thread to form a needle thread loop, includes a case holder having an annular guide rib and a pin extending axially outwardly of the holder. A bobbin case has a central hollow sleeve into which the pin extends and a latch engageable with the pin to hold the case holder to the bobbin case. The case each holder and the bobbin case have a sidewall with interiors which are in substantial alignment. The bobbin case holder has a rearwall formed as a substantially truncated cone which is eccentric to the guide rib and the bobbin case has an annular sidewall and a frontwall have an arched mushroom shape. The bobbin case holder and the bobbin case are fitted together, not telescopingly, but on the pot-and-lid principle.

REFERENCES:
patent: 1019208 (1912-03-01), Wardwell
patent: 1467898 (1923-09-01), Kiewicz
patent: 1504242 (1924-08-01), Hohmann
patent: 1794255 (1931-02-01), Stephenson
patent: 2941488 (1960-06-01), Attwood
patent: 4284017 (1981-08-01), Starr

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