Dating singer 301a sewing machine
A round leather "treadle belt" passes up from the treadle, up through the cabinet, over the handwheel by following the belt groove, back down through the cabinet again, and then back to the treadle.
The belt is joined end-to-end with a clip to make a loop, and can be shortened and reclipped (using special "treadle belt pliers") as needed to keep proper tension.
Of Vibrating Shuttles These are shuttles of the long description, moving in a segment of a circle. The most novel machine of this kind is the vibrating shuttle machine just produced by the Singer Manufacturing Company.
In this case the shuttle itself consists of a steel tube, into the open end of which the wound reel is dropped, and is free to revolve quite loosely.
Variation of tension is thus obviated in a very simple manner.
The chief point of interest in the machine is undoubtedly the means employed in transferring the motion from the main shaft to the underneath parts, an arrangement as ingenious and effective as any device ever introduced into stitching mechanism. Robert Whitehall [sic], and consists of a vertical rocking shaft situated in the arm of the machine[.] Motion is imparted to it by means of an elbow formed upon the main shaft acting upon two arms, called wipers, projecting from the rocking shaft, the angle formed by the arms exactly coinciding with that of the elbow in its revolution.
Early treadles were for just one foot making a heel-toe rocking motion, but all later treadles, including those offered with 27-series machines, were for two feet making a left-heel-right-toe (or vice versa) motion.
All machines in the 27 series (VS-1, VS-2, VS-3, 27, 28, 127, and 128) have the following distinguishing characteristics that can be used to differentiate them from other Singer machines: The design of the model 27 series began with Allen B.
Wilson, who invented the vibrating shuttle in 1850 and sold machines built around it.
Two decades later, when the patents had expired and the Sewing Machine Combination patent pool had dispersed, White Sewing Machine Company employees D'Arcy Porter and George W.
Bolton was thrilled with the machine and suggested a sewing competition against the best Singer models on-hand at the factory.
Whitehill's prototype prevailed, and he sold the rights to it for USD 8,000 (USD 212,000 adjusted), with USD 1,000 held in reserve until he had perfected it for them.