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Early sewing machines of the 19th century oscillate their shuttles back and forth on linear horizontal tracks—an arrangement called a "transverse shuttle". A vibrating shuttle machine, by contrast, 'vibrates' its shuttle in a circular arc. This movement represents less total mechanical motion, which means less friction, less wear, higher ...
The purl stitch. An overlock is a kind of stitch that sews over the edge of one or two pieces of cloth for edging, hemming, or seaming.Usually an overlock sewing machine will cut the edges of the cloth as they are fed through (such machines being called sergers in North America), though some are made without cutters.
Of a typical garment factory's sewing machines, half might be lockstitch machines, and the other half divided between overlock machines, chain stitch machines, and various other specialized machines. Industrial lockstitch machines with two needles, each forming an independent lockstitch with its own bobbin, are also very common.
Knowing that such a machine would surely lead to patent litigation with his former partners who had bought out the patent for the vibrating shuttle, Wilson kept working, and developed a refined design which kept the bobbin stationary. He filed for patent, and the partners built their first production rotary hook machine the same year, selling ...
A sewing machine thus electrified now fit entirely inside a woman-portable carrying case. Electric motors became so common that Singer made provision for them: the model 127/128 'modernized' versions included mounting lugs for a motor, whereas earlier models had to be drilled and tapped.
A sewing machine presser foot. A presser foot is an attachment used with sewing machines to hold fabric flat as it is fed through the machine and stitched. Sewing machines have feed dogs in the bed of the machine to provide traction and move the fabric as it is fed through the machine, while the sewer provides extra support for the fabric by guiding it with one hand.
Closeup of the vertical feed mechanism on an 1877 Davis sewing machine. Later Davis machines used a more conventional feed mechanism, with a stationary presser foot and feed dogs. Davis called them "underfeed" machines. On Oct 18, 1881, Davis Sewing Machine Co., was awarded US Pat. 248,449 for improvements over existing shuttle designs. Page 1 ...
A special loose loop stitch used for this purpose is called a 'tack' or 'tailor's tack'. This is often done through two opposing layers of the same fabric so that when the threads are snipped between the layers the stitches will be in exactly the same places for both layers thus saving time having to chalk and tack the other layer.