Memoirs of the Distinguished Men of Science of Great Britain Living in the Years 1807-8Walker, William
History
Memoirs of the Distinguished Men of Science of Great Britain Living in the Years 1807-8
Walker, William
Scientists -- Great Britain -- Biography
This eminent practical engineer and machinist was born at Stainborough,
in Yorkshire. His father rented a farm on the estate of Lord Strafford,
and Joseph, being the eldest of five children was intended for the
same employment; but fortunately for his subsequent career, an
accidental lameness, which occurred when he was sixteen years old,
prevented his following agricultural pursuits. When quite a boy, Bramah
exhibited unusual mechanical talent; he succeeded in constructing two
violoncellos, which were found to be very tolerable instruments, and
also managed to cut a violin out of a single block of wood, by means
of tools which were forged for him by a neighbouring smith, whom in
after life he engaged in London as one of his principal workmen. After
having served an apprenticeship to a carpenter and joiner, Bramah
obtained employment in the workshop of a cabinetmaker in London, and
soon afterwards established himself as a principal in the business. The
history of his life after this is perhaps best given by a record of
his numerous inventions, all of which are, more or less, of a highly
useful character. For the manufacture of these, Bramah first took up
his residence in Denmark Street, Soho, but subsequently removed to
Piccadilly, and established the various branches of his manufactory
in some extensive premises at Pimlico. In 1783 he took out a patent
for an improved watercock, and in the year following, completed the
invention of his famous lock, which for many years stood unrivalled
in ingenuity of construction, workmanship, and powers of resistance
against all attempts to pick.[4] Bramah's indefatigable spirit of
invention was stimulated to fresh efforts by the success of his lock,
and he now entered upon a more important and original line of action
than he had yet ventured upon. In his patent of 1785 he indicated
many inventions, although none of them came into practical use--such
as a Hydrostatical Machine and Boiler, and the application of the
power produced by them to the drawing of carriages and the propelling
of ships, by a paddle-wheel fixed in the stern of the vessel. For
different modifications of pumps and fire-engines, Mr. Bramah took out
three successive patents, the two last being dated in 1790 and 1798.
But in the year 1795 he produced and patented the most important of all
his inventions, namely, 'The Hydraulic Press,' a machine which gives
to a child the strength of a giant, enabling him to bend a bar of iron
as if it were wax. The chief difficulty which Bramah experienced in
constructing this press was that of devising an efficient packing for
the ram or solid piston, which, while capable of keeping out the water
under the tremendous internal pressure exercised by the pump, should,
on the withdrawal of that pressure, allow the ram to sink into its
original place. This was at length accomplished by the invention of the
self-tightening leather-collar, which was firmly secured in a recess at
Public-domain text, read in full here on John Shaqi.
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