Taken From Description:
Machines 79-101, 79-102 and 79-103 are designed for tacking at high speed. These machines have a positive, gear driven, intermittent feed which controls the movement of the work clamp so that the stitches are uniformly spaced. The tack is stitched over twice, the first (coarse) stitch being covered in the return feed by a fine stitch. By simply changing the stitch regulating gear, the number of stitches in the tack can be varied, as desired. (See list of stitch regulating gears on page 16.)
The stop motion mechanism of these machines includes a pair of gears having a ratio of 2 to 1 for reducing the speed of the stop cam to one-half the speed of the sewing shaft. The stop cam has two stop notches located diametrically opposite each other so that when the stop motion mechanism is engaged, the stop cam turns only a part of a revolution before the interlocking rod drops into one of the notches to stop the machine. A single, extra-long spiral spring in the stop cam gear helps the machines to stop without shock.
MACHINE 79-101 is designed for tacking straps to underwear, labels to garments, and for similar purposes. It makes a whip stitch. The length of tack is adjustable from 3/8 inch to 7/8 inch. A thread trimmer automatically cuts both threads.
MACHINE 79-102, for stitching buckles on garters and similar articles, makes a whip stitch. The length of tack is adjustable from 1/4 inch to 1-1/8 inches and the width of bight is adjustable from 1/16 to 3/16 inch. A thread trimmer automatically cuts the under thread.
MACHINE 79-103, for tacking hose supporters to corsets and for similar purposes, makes a whip stitch. The length of tack is adjustable from 5/8 inch to 1-5/8 inches and the width of bight is adjustable from 1/16 to 1/4 inch. A thread trimmer automatically cuts both threads.
If you are looking for Singer 79-101, 79-102, 79-103 High Speed and Gear Driven Feed Instructions Manual for Using and Adjusting, please download it from their official website that the link is below.
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