Contour tracing sewing machine

Details Contour tracing sewing machine Contour tracing sewing machine

1976-06-21

1978-02-07

Schroeder, Werner H.

Sewing

Special machines

Darning

D05B 2100

Patent

active

040721140

ABSTRACT:
This invention relates to a contour tracing sewing machine for forming a line of seam on a workpiece in conformity with a contour of a stitching templet of a desired shape.
The tracing device used in the contour tracing sewing machine comprises a light source for emitting light towards the stitching templet, and a light sensing head consisting of a plurality of optical fibers arranged in an annular form for transmitting the light radiated on the stitching templet to a plurality of photoelectric cells. The tracing device further comprises a device for selecting a predetermined tracing direction according to electric signals produced from the plurality of photoelectric cells, so that the stitching templet and the workpiece may be shifted relatively to the light source and the sensing head by a drive device of an open-loop type in the tracing direction thus selected.

REFERENCES:
patent: 3385245 (1968-05-01), Ramsey et al.
patent: 3742878 (1973-07-01), Byrne et al.
patent: 3758784 (1973-09-01), Vischulis
patent: 3933556 (1976-01-01), Strack

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