Improvements in Steam Hoisting or Winding Machinery.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Hoisting or Winding Machinery.
I, ROBERT RISK, of Halidon Villa, Cambuslang, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say:-
My said invention relates to steam hoisting or winding machinery employed
in cases in which it is desirable to have under complete and continuous manual
control the speed at which and the extent or distance to which each action takes
place; and my object is to provide steam hoisting or winding machinery with
improved devices for the purpose.
Amongst various applications in which my improved machinery is advantageous
may be mentioned, ashes hoists for steamers, and hoists for warehouses or stores.
In carrying out my invention I provide the steam cylinder or cylinders of the
machine with a controlling valve such as is employed in steam steering machines,
and I arrange for acting on the valve a lever which is movable by a shaft having
on it a handwheel. A part of this shaft is screwed and works in an internally
screwed tube held in a bearing so that it can rotate but not move on end. When
the handwheel is turned by the operator its shaft is moved longitudinally by the
screw action and it moves the controlling-valve lever accordingly. The internally
screwed tube has fast on it a bevil wheel which has gearing with it a bevil wheel
on a shaft connected by toothed gearing with the crank shaft, which has on it or
is geared to the winding barrel. When the crank shaft turns in consequence of
a movement of the controlling-valve lever, the internally screwed tube is turned
in a direction to restore the controlling-valve lever to its neutral position. In
order to continue the action of the machine to the extent required, the operator
has to continue to turn the handwheel and to thereby keep the controlling-valve lever
in the required position. The operator regulates the speed by the extent to which
he keeps the controlling-valve lever moved from its neutral position. To stop
the action the operator simply discontinues to turn the handwheel, whereupon
the machine stops itself; the stopping is however effected without abruptness
which is an important practical advantage.
The handwheel shaft may be made with a screwed extension working through
a guided nut. Adjustable stops are provided between which the nut can move;
and these stops prevent the action of the machine being continued beyond pre-
determined limits, the contact of the nut with either stop preventing the further
rotation of the handwheel shaft in the same direction.
In steering machines various devices are employed for moving the controlling-
valve lever and returning it to its neutral position. Any suitable one of such
devices is a mechanical equivalent for the corresponding device hereinbefore
described and may be substituted therefor.
Dated this Fifth day of August 1898.
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements in Steam Hoisting or Winding Machinery.
I, ROBERT RISK, of Halidon Villa, Cambuslang, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, that is to say:-
My said invention relates to steam hoisting or winding machinery employed
in cases in which it is desirable to have under complete and continuous manual
control the speed at which, and the extent or distance to which each action takes
place; and my object is to provide steam hoisting or winding machinery with
improved devices for the purpose. Amongst various applications in which my
improved machinery is advantageous may be mentioned, ashes hoists for steamers
and hoists for warehouses or stores.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append two sheet of explanatory drawings
to be hereinafter referred to in describing my improvements.
Figure, 1, of the drawings is a front elevation and Figure, 2, is a side elevation
partly in section of my improved machinery. Figure, 3, is a sectional plan of
letails in connection therewith. In these drawings the same reference letters
and numerals are used to mark the same or like parts wherever they are repeated.
In carrying out my invention I provide the steam cylinders, A, B, of the hoist-
ing or winding machine with a controlling valve (not shown) such as is employed
in steam steering machines, the valve working in a casing or chamber, C, com-
municating with the steam cylinders. The controlling valve is acted on by a
lever, D, which is centered on a pin, D1, fixed to a bracket, D2, fixed to the
framing of the machine. The lever, D, works in a slotted quadrant part, 13,
formed on the bracket, D2, one of its arms being fixed to the controlling valve
rod, E, and the other arm to a nut or crosshead, F, fixed to a shaft, G, which is
movable by a hand wheel, H. A part, G 1, of the shaft, G, is formed with a
left-hand screw thread of comparatively large pitch, which is arranged to work in
an internally screwed tube or boss, J, held in a bearing, J1, by a nut, J2, so
that it can rotate but not move on end. When the handwheel, H, is turned by
the operator the shaft, G, is moved longitudinally by the screw action, thereby
moving the lever, D), so as to act on the controlling valve and start the machine.
The internally screwed tube or boss, J. has formed or fixed to it a bevil wheel, K,
which has gearing with it a bevil wheel, Kl, fixed to a vertical shaft, L, con-
nected by bevil wheels, L1, L2, with a horizontal shaft, M, having fixed to it a
pinion, MI, gearing with a spurwheel, M2, on the main or winding barrel
shaft, N. Other similar convenient arrangements of gearing may be adopted if
desired for conveying motion from the crank shaft, N, to the internally screwed
tube, J. When the crank shaft, N, turns in consequence of say a right hand move-
ment of the controlling-valve lever, D, the internally screwed tube, J, being
geared to the crank shaft is turned in a direction so as to move the shaft, G.
inwards thereby restoring the controlling-valve lever, 1), to its neutral position,
as shown in the drawings, and stopping the machine. In order to continue the
action of the machine to the extent required the operator has to continue to turn
the handwheel, H, in a right or left hand direction, according to the direction in
which the machine is required to run so as thereby to keep the controlling valve
lever, D, in the required position. The operator regulates the speed of the machine
by the extent to which he keeps the controlling valve lever, D., moved from its
neutral position the extent to which the lever can be moved in either a right or
left hand direction being however limited by stops, which act against each end

page_text: of the internally screwed tube, J, a collar, G2, fixed to the shaft, G, forming a
stop in one direction, and the nut or crosshead, F, forming a stop in the other
direction of the lever's movement. To stop the action the operator simply dis-
continues to turn the handwheel, H, whereupon the machine stops itself; the
stopping is however effected without abruptness which is an important practical
advantage
The handwheel shaft, G, is preferably made with an extension, P, which is
formed with a right hand screw thread of comparatively small pitch, so as to
work in a nut, P1, which is prevented from turning by fixed guides, Q, which
engage in armis, P2, formed on the nut. If desired the parts, P, and, G 1, may
be formed respectively with a left and a right hand screw thread instead of a right
and a left hand as described. Adjustable stops are provided between which the
nut, P1, can move, one being the collar, G2, hereinbefore referred to, and the other
a collar, G3, fixed to the end of the extension, P. These stops prevent the
action of the machine being continued beyond predetermined limits, the contact of
the nut P1, with the stop, G3, as shown in the drawings preventing the further
rotation of the handwheel in one direction, and when the nut travels along the
screwed extension again towards the stop G2, by reason of the movement of the
handwheel, H, its contact with that stop prevents the further rotation of the hand-
wheel in the opposite direction.
In steering machines various devices are employed for moving the controlling-
valve lever, D, and returning it to its neutral position. Any suitable one of
such devices is a mechanical equivalent for the corresponding device hereinbefore
described and may be substituted therefor.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The combination and arrangement of parts constituting my improved steam
hoisting or winding machinery substantially as herein before described with
reference to the accompanying drawings.
2. In steam hoisting or winding machinery the arrangement of a lever acting
on a controlling valve and moved from its neutral position by a handled screw shaft
working in an internally screwed tube the lever being returned to its neutral
position by the rotation of the screwed tube which receives motion from the
crank shaft of the machine combined with adjustable stops substantially as herein-
before described with reference to the accompanying drawings.
Dated this Fourth day of May 1899
EDMUND HUNT,
Applicant's Agent.