Driving apparatus for an oscillating catcher of a sewing machine
AssigneeFritz Gegauf AG Bernina-Nahmaschinefabrik
InventorsChristian Anderegg, Andre Stucki
Life of this patent
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Abstract
A driving apparatus for an oscillating catcher of a sewing machine includes a toothed pinion being eccentrically mounted on a driving shaft for the catcher for the sewing machine. A transmission device, having teeth, is guided in a back-and-forth movement by an oscillating crank drive, with the teeth of the transmission device engaging the tooth pinion on the driving shaft. By arranging the toothed driving gear eccentrically on the driving shaft of the catcher, it is possible to substantially increase the speed of the point of the catcher when it seizes the loop of the upper thread offered by the needle.
Claims16
A driving apparatus for an oscillating catcher of a sewing machine, comprising:
- a catcher with a driving shaft;
- a toothed pinion eccentrically mounted on said driving shaft of said catcher;
- an oscillating crank drive;
- and,
- transmission means guided in a back-and-forth motion by said oscillating crank drive, said transmission means having teeth for engaging teeth of said tooth pinion.
Dependencies are inferred from the claim text.