Inventors at Work, with Chapters on DiscoveryIles, George
History
Inventors at Work, with Chapters on Discovery
Iles, George
Inventions -- History; Inventors
“To make my meaning clear, let me revert to the familiar operation of
sewing. The hand process is plainly unsuited for mechanical
reproduction. How is it to be translated into an equivalent cycle
suitable for mechanism? In other words, how is it to be ‘coded’? This
case is interesting, inasmuch as we have two independent solutions
worked out at different dates and widely different in nature. The
earlier invention imitated the hand cycle very closely. The thumb and
finger of the right hand in the human being were replaced by pairs of
pincers capable of taking hold of the needle and letting it free again,
but to avoid having to follow the intricate movements of the human
fingers in the operation two pairs of pincers were used, one on each
side of the work, which passed the needle backwards and forwards through
the fabric one to the other. Following out this idea the needle was
pointed at both ends with an eye in the middle, and, as in hand sewing,
it carried a moderate length of thread. The pair of pincers which held
the threaded needle advanced to the fabric and passed through it to the
other pair which took it and retreated so as to draw the thread tight
and form the completed stitch. To form the next stitch the work was
moved through the proper distance and the same process was gone through,
the line of movement of the needle always remaining the same.
“There is not much ‘coding’ here. The new cycle imitates the hand-worker
so faithfully that it benefits little by the advantages of mechanical
action. As in hand work it can only sew with moderate lengths of thread,
and must therefore have the needles re-threaded at intervals. Its
superiority over hand labor is therefore so slight that it is doubtful
whether such a sewing machine could ever have competed with, much less
replaced, hand work. But it has one great merit. The needle mechanism is
capable of being re-duplicated almost without limit, and the movement of
the work which is necessary to direct the stitches for one needle will
serve equally well for any number of needles working parallel to it.
Hence the machine that would have failed as a sewing machine has
survived and proved useful as an embroidery machine. The work is
stretched between two rows of pincers and moved by the workman according
to the stitches of the pattern. Each stitch is repeated by each of the
parallel needles which work side by side at convenient distances, and
thus as many copies of the pattern are simultaneously produced as there
are needles. Each is a perfect facsimile of all the others, and as each
copies faithfully the errors of the workman, this machine is entitled to
the proud boast that its productions possess all the defects of hand
work--an essential we are told of artistic beauty.
Public-domain text, read in full here on John Shaqi.
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