Title: Sewing machine six motion work feeding mechanism

Abstract: A work feeding mechanism for sewing machines including a feed dog with two pair of mutually orthogonal serrated teeth to drive a fabric past a stitch forming area in directions defined by mutually orthogonal axes. The feed dog is slidably mounted to a bracket which in turn is pivotally fastened to one extremity of a feed bar whose opposite extremity is suspended by gimbals carried in the bed. Means are disclosed to selectively impart oscillations of a varying amplitude and direction to the slidable feed dog in timed synchronization to the work feeding mechanism to drive the feed dog in lateral and longitudinal directions of fabric feeding motion which extend along the length of the sewing machine bed and normal to the length of the bed. Fabric feeding information for the work feeding mechanism may be stored in an electronic memory to permit the production of ornamental stitch patterns.

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Inventors: Adams, Kenneth D. (Madison, NJ, US)

Application Number: 100762
Filing Date: 1979-12-06
Publication_date: 1980-10-07
Assignee: The Singer Company (Stamford, CT)
Primary Class(es): 112/308 112/323, 112/453, 112/461
Other Classes:
US Patent Ref:

2311222	Feb, 1943	Galkin	112/308.
3026832	Mar, 1962	Taketomi	112/308.
3096737	Jul, 1963	Bono	112/308.
3527183	Sep, 1970	Szostak	112/323.
3561382	Feb, 1971	Ketterer et al.	112/308.
3855956	Dec, 1974	Wurst	112/158.
3921552	Nov, 1975	Daman et al.	112/323.
4187794	Feb, 1980	Ross et al.	112/308.

Other Refs:
Primary Examiner: Hunter, H. Hampton
Assistant Examiner:
Attorney: Trygg; James M., Bell; Edward L., Smith; Robert E.