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Man power was used at first, then horses before going
on to water wheels for power. A seventy four gun ship required 1400
blocks of various sizes for the running gear of the sails, handling the
guns and other such purposes. Prior to the Taylor machines, the axe,
saw, and auger were the principal tools used, no two articles were
alike and in stress of storm or battle it was a frequently occurrence
for a ship to get into differculties through failure of these
mechanical aids. They say that Henry Ford had the first production
line. The Taylor's must have beat him by about 150 years, with logs
going in one end, and blocks out the other. (250,000 in the two years
leading up to the `Battle of Trafalgar'.) |
SHIPS PUMPS. Before taylor's time,
pumps for sailing ships were of three kinds: the chain pump, the bucket
pump or bailing machine, and the piston suction pump. All were liable
to frequent failure. The bucket pump was , as its name implied, a
simple bucket with a flap valve in the bottom; this was liable to choke
with gravel or waste timber, as were the valves of the suction pump.
All types were wasteful of manpower and would work only with low heads.
Taylor experimented extensively using pumps with glass cylinders, by
which means he was able to see for himself the operation of the valves.
The essential invention lies in the use of spherical valves on
cylindrical seatings. The first prototypes made were fitted with ball
valves which were not successful. The valves fitted in later pumps
consisted of a segment of a sphere, in the centre of which was fixed a
stalk having a pendulum weight. This allowed the valve partly to rock
and thus clear itself while tending to return to a vertical position.
The pump barrel of the last Taylor pump was of copper, the pump rod
having a leather fitted bucket. The barrel was enclosed in a wooden
casing bored from a log of timber, the pump suction being an extension
of this wooden tube. Taylor overcome the differculty of excessive
suction-head by lowering the pump into the hold, thus decreasing the
distance between the foot valve at the lower end of the suction pipe
and the the suction valve of the pump. This type of pump having a 7
inch bore would lift 1 ton per minute a distance of 24ft with a crew of
ten men hauling five aside alternately. Pumps up to five times this
capacity were made. |