IMPROVEMENTS IN STEAM WINCHES
Year: 1877

page_text: LETTERS PATENT to Edwin Paul, of Liverpool, in the County of Lancaster,
Consulting Engineer, for the Invention of "IMPROVEMENTS IN STEAM
WINCHES."
Sealed the 9th November 1877, and dated the 22nd June 1877.
PROVISIONAL SPECIFICATION left by the said Edwin Paul at the Office of
"
.
the Commissioners of Patents on the 22nd June 1877.
EDWIN PAUL, of Liverpool, in the County of Lancaster, Consulting Engineer.
IMPROVEMENTS IN STEAM WINCHES."
The object of this Invention is to provide a steam winch mainly for use on 'board'
ship, whereby the operator shall be enabled not only to raise and lower goods to
be loaded, discharged, or moved, but also to swing them laterally outwards or
inwards and deposit them in the desired position.
For this purpose I provide the winch with an extra steam cylinder or steam
cylinders, arranged and coupled so as to operate a double-grooved pulley. A rope
or chain for moving a jib is led around the said grooved pulley and secured at one.
end to a fixed point, say, to one side of a ship; it is passed thence over a pulley on
the end of the jib or carrier downwards, around the grooves of the pulley, up over
a second pulley on the end of the jib or carrier, and finally the other end is secured
to another fixed point at the other side of the ship. To swing the jib or carrier to'
one side or the other, or forwards or backwards, the said double-grooved pulley is
caused to revolve in one direction or the other.
In order to keep the rope or chain tight on the pulleys it is passed around.
another pulley which is attached to a piston rod connected to a piston in a cylinder."
Steam pressure is kept on one side of the said piston so as to keep the rope or chain.
tight, at the same time the motion allowed to the piston by the elasticity of the..
steam permits of any inequalities of motion of the jib or carrier being taken up."
soine cases a spring or weight might be used instead of steam pressure.
In

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edwin Paul in the Great Seal Patent Office on the 22nd December
1877.
EDWIN PAUL, of Liverpool, in the County of Lancaster, Consulting Engineer.
"IMPROVEMENTS IN STEAM WINCHES."
The object of this Invention is to provide a steam winch mainly for use on board
ship, whereby the operator shall be enabled not only to raise and lower goods to be
loaded, discharged, or moved, but also to swing thein laterally, outwards or inwards,
and deposit them in the desired position.
For this purpose I provide the winch with an extra steam cylinder or steam
cylinders, arranged and coupled so as to operate a double-grooved pulley. A rope
or chain for moving a jib is led around the said grooved pulley and secured at one
end to a fixed point, say, to one side of a ship; it is passed thence over a pulley on
the end of the jib or carrier, downwards around the grooves of the pulley, up over
a second pulley on the end of the jib or carrier, and finally the other end is secured
to another fixed point at the other side of the ship. To swing the jib or carrier to
one side or the other, or forwards or backwards, the said double-grooved pulley is
caused to revolve in one direction or the other.
In order to keep the rope or chain tight on the pulleys it is passed around
another pulley which is attached to a piston rod connected to a piston in a
cylinder. Steam pressure is kept on one side of the said piston so as to keep the
rope or chain tight, at the same time the motion allowed to the piston by the
elasticity of the steam permits of any inequalities of motion of the jib or carrier
being taken up.
In some cases a spring or weight might be used instead of steam pressure.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a side elevation of a steam winch constructed in accordance with my
Invention.
1 is the framing of the winch; 2, steam cylinders and appliances for giving
motion to the winding gear and barrel 3; 4, chain passing over a pulley on the jib
or boom 5 for raising and lowering.
The above part of the winch is constructed in any ordinary or desired manner.
6, rope secured to the side of the ship, thence passing upwards around a pulley
on the jib or boom 5, down around the groove 9 in the pulley 10, shown in Fig. 2,
forward round the pulley 11, thence round the pulley 91 on the pulley 10, upwards
round a second pulley on the jib 5, to be finally secured at the other side of the
ship. The pulley 11 is connected by the fork and rod 12 to a piston in the cylinder
13. Steam pressure is maintained on the said piston so as to keep the free-ended
loop of the rope 6 which passes around the pulley 11 tight.
A spring or weight may be used instead of steam pressure to effect the same
object.
A steam cylinder and piston 14 provided with reversing gear 15 serves to give
motion in either direction to the grooved pulley 10.
The operation is as follows:-When a load has been raised or lowered the desired
distance, motion is given to the cylinder 14, and with it the pulley 10. The motion
of the said pulley 10 causes the rope 6 to be pulled tight on one side of the jib or
boom 5 and slackened on the other; this causes the said jib or boom to swing
round, more or less, to one side or the other, according to the amount of motion
given to the pulley 10; and thus the load may be moved by the attendant who
operates the winch over any point where it is desired to deposit it. The pulley 11
.serves to take up any slack in the chain 6, and at the same time enables it to main-
tain its grip on the pulley 10.
It will be obvious that the pulley 10 and operating cylinder, as also the pulley

page_text: 11 and its cylinder or weight, may be constructed and arranged in any conve-
nient manner to suit the class of winch used, and that the points to which the
ends of the rope 6 are attached may be varied without departing from my
Invention.
Having now described and illustrated the nature of my said Invention in such
manner that others will be enabled to carry my improvements into effect, I
claim,―
First. Constructing or providing a steam winch with independent or auxiliary
apparatus or appliances for giving motion to a jib or boom, substantially as set
forth.
Second. The pulley operated by steam or other pressure so as to keep the free-
ended loop of a rope or chain tight, for the purposes set forth.
In witness whereof, I, the said Edwin Paul, have hereunto set my hand and
seal, the Twentieth day of December, in the year of our Lord One thousand
eight hundred and seventy-seven.
JAMES JOHNSON,
Patent Office,
Clayton Square,
Liverpool.
Witness.
E. PAUL. (L.S.)