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US 5,704,303 AGranted
Sewing machine control mechanism
OwnerHsien Chang Tsenginventor
Life of this patent
Estimating the term…
Abstract
A sewing machine includes two rods rotatably and slidably supported in the sewing machine and two lower loopers secured on the rods. A spindle is coupled to the rods by an eccentric and coupling members for rotating the rods and the lower loopers. One of the lower loopers may be moved axially together with one rod to which a pawl is rotatably supported, The pawl may be selectively engaging with the other rod for allowing the pawl to selectively moving the other rod axially and for allowing the lower loopers to perform two double chain stitchings.
Claims9
A sewing machine comprising:
- a first and a second rods rotatably and slidably supported in said sewing machine, said first and said second rods being adapted to be moved longitudinally,
- a first and a second lower loopers secured on said first and said second rods respectively and rotated in concert with said first and said second rods,
- means for swinging said first and said second rods and said first and said second lower loopers,
- means for moving said first rod and said first lower looper axially, and
- means for selectively moving said second rod and said second lower looper axially.
2 more elements
Dependencies are inferred from the claim text.