Device for tilting sewing machine hooks to facilitate threading
AssigneeRockwell-Rimoldi S.p.A.
InventorNerino Marforio
Life of this patent
Estimating the term…
Abstract
A device for selectively displacing sewing machine hooks to a position whereat they are readily accessible to an operator for threading purposes. The device includes a lever member pivotably mounted on the shaft which supports the hooks and an arm in the form of a cylindrical seat fixed on the shaft which carries a spring biased pin that is continuously urged into driving engagement with the lever member to effect oscillating movement of the shaft. A manually operable member is provided for disengaging the pin from driving engagement with the lever which permits the shaft to be rotated to a position that places the hooks carried thereby in an accessible position.
Claims5
A device for tilting the hooks within the base of a sewing machine of the type having needles operatively associated with the hooks for forming chain stitches, said device comprising:
- a. a hook supporting shaft (15) oscillatably supported within the base of the sewing machine;
- b. a lever member (31) pivotally mounted on said hook supporting shaft which includes:
- i. an arm (32) having a segment (33) formed on the free end thereof, said segment being concentric to said hook supporting shaft (15) and including means on the inner surface thereof defining a radial bore (34);
- c. actuating means (37) fixed on said hook supporting shaft in operative association with said lever member;
- d. a pin (36) slidably carried by said actuating means for connecting said lever member (31) with said actuating means (37) to effect oscillating movement of said hook supporting shaft (15);
- and
- e. means for selectively disconnecting said lever member (31) from said actuating means (37) to permit tilting of the hooks to a position to facilitate the threading thereof.
Dependencies are inferred from the claim text.