Improvements in or in connection with Ash and other Hoists.
Year: 1899

page_text: Date of Application, 13th Feb., 1899
Complete Specification Loft 12th Nov 1000 Accented 16th Dan
4000
Date of Application, 13th Feb., 1899
Complete Specification Loft, 13th Nov., 1800 Accepted, 16th Dec., 1900
PROVISIONAL SPECIFICATION.
Improvements in or in connection with Ash and other Hoists.
We, WILLIAM RAILTON, of 344, Walton Breck Road, Anfield, Liverpool, in
the County of Lancaster, RICHARD CAMPBELL, of 28, Monastery Road, Liverpool,
aforesaid, and SAMUEL GEORGE RAILTON, of 11, Melbourne Street, Liverpool,
aforesaid, Engineer, do hereby declare the nature of this invention to be as
follows:
This invention relates to ash and other hoists, and is designed more especially
for use as ash or coal hoists on steamers.
The
In carrying our invention into effect, we employ a pair of pulley blocks one
above the other in which several sheaves are arranged to run on the same pin
bearing in each block, and for motive power a steam and air cylinder.
running pulley block is attached to the piston rod of the cylinder, while the
standing pulley block in fixed stationary to a bulkhead or any other suitable
object. A rope is secured at one end to a fixed point and passing over each
sheave alternately finally goes from the upper pulley block over a guide pulley
or pulleys to the bucket. By having six sheaves in each block the speed can
be increased 12 times, that is to say the bucket is raised 12 times the stroke of
the piston at each movement of the latter. The number of sheaves can however
be increased or decreased as desired according to the distance the bucket is re-
quired to travel. Guide rods are firmly secured at one end to the top of the
cylinder and at the other to the block in which the sheaves are mounted. The
pulley block at the end of the piston rod slides in these guide rods and thus
secures a steady up and down motion.
Steam is let into the cylinder on the upper side only, through a steam valve.
The lower side is provided with an air cushion valve or air clack valve which
freely admits air into the cylinder when the piston rises but closes when the piston
descends, thus preventing any escape of air that way. The cylinder at the lower
side is also provided with a throttle valve which is the sole outlet for the air to escape
through when the piston descends, and this valve throttles the air to any required
extent. When therefore steam is let into the cylinder on the upper side of the
piston, the air below being throttled by the throttle valve only gradually leaves the
cylinder and consequently the bucket is raised at a uniform speed proportionate
to that at which the air can escape from the cylinder, the object of the throttle
valve being to throttle the air and prevent any sudden rise of the bucket, thus
securing that it shall ascend at a determined speed. To lower the bucket, all
that is necessary is to close the steam valve by the starting lever, thus opening
the exhaust. The piston will then ascend drawing in air through the air cushion
valve and the bucket descends by its own weight. The cushion valve can be
regulated if desired so that it will adjust to a nicety the admission of air and
consequently the speed of descent of the bucket with load, the throttling of the
exhaust steam acting as cushion to the piston in its return stroke, thus also
regulating the speed of descent. The amount of steam required to operate the
piston is small.

page_text: The steam valve fitted to the motive power cylinder may consist of a slide or
long D valve fitted to slide on ports in the steam chest and worked by a hand
lever on the outside. In combination with this steam chest we provide a throttle
or controlling valve which can be regulated by hand as required. The ☐ valve
controls two ports, one leading to the steam cylinder for the supply of live
In
steam and the other port leading direct to the throttle valve aforesaid.
operating the loist therefore, all that is necessary is to move the handle so as
to open the live steam port, and let steam into the cylinder on the upper side
of the piston to raise the load. To lower the hoist all that is necessary is to move
the hand lever in the opposite direction, thus closing the steam port and opening
the exhaust port which leads to the throttle valve. The steam being throttled
by this valve, only gradually leaves the cylinder and consequently the load
descends at a uniform speed proportionate to that at which the steam can escape
from the cylinder. The throttle valve however can be regulated by hand, so
that it will adjust to a nicety the exhaust, and consequently the speed of the
load, the throttling of the exhaust steam acting as a cushion for the piston in
its return stroke so as to secure the descent at any speed required.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.
Improvements in or in connection with Ash and other Hoists.
We, WILLIAM RAILTON, of 344, Walton Breck Road, Anfield, Liverpool, in
the County of Lancaster, RICHARD CAMPBELL, of 28, Monastery Road, Liverpool,
aforesaid, and SAMUEL GEORGE RAILTON, of 11, Melbourne Street, Liverpool,
aforesaid, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:---
This invention relates to ash and other hoists, and is designed more especially
for use as ash or coal hoists on steamers. Since Letters Patent No. 15786/98
were granted to us, we have found that the use of a head of water in a tank
referred to in that patent, could be dispensed with, and an air cushion provided in
place thereof to regulate the speed of ascent of the load, and as the law prescribes
that the best mode known to us of carrying the invention into effect should be
disclosed, we have applied for this patent, and will now describe the invention
as originally applied for, but with all our latest improvements added.
The present application therefore has for its object the patenting in its modified
form without the water tank, of the invention protected under No. 15786 of 1898.
In the accompanying drawings,
Figure 1 is a front elevation of our invention applied to an ash hoist;
Figure 2, a side elevation thereof;
Figure 3, a vertical section of the slide valve.
We employ a pair of pulley blocks A and B one above the other in which
several sheaves are arranged to run on the same pin bearing in each block, and for
motive power a steam and air cylinder C. The running pulley block A is attached
to the piston rod 1 of the cylinder C, while the standing pulley block B is fixed
stationary to a bulkhead or any other suitable object. The rope is secured at one
end to a fixed point B and passing over each sheave alternately finally goes from
the upper pulley block B over a guide pulley F or pulleys to the bucket which is

page_text: coupled to the eye L. M is a balance weight and N a rubber collar to prevent
noise should the balance weight knock against anything. By having six sheaves
in each block the speed can be increased twelve times, that is to say the bucket
is raised twelve times the stroke of the piston at each movement of the latter.
The number of sheaves can however be increased or decreased as desired according
to the distance the bucket is required to travel. Gare guide rods firmly secured
at one end to the top of the cylinder and at the other to the block in which the
sheaves E are mounted. The block A at the end of the piston rod D) slides in the
guide rods G and thus secures a steady up and down motion.
Steam is let into the cylinder on the upper side only through the steam valve H.
The lower side is provided with an air clack valve "I which freely admits air to
the cylinder when the piston rises but closes when the piston descends, thus
preventing any escape of air that way. The cylinder on the lower side is
also provided with a throttle valve J which is the sole outlet for the air to
escape through when the piston descends and this valve throttles the air to
any required extent. When therefore steani is let into the cylinder C on the
upper side of the piston the air below being throttled by the throttle valve J
only gradually leaves the cylinder C and consequently the bucket is raised at
a uniform speed proportionate to that at which the air can escape from the
cylinder, the object of the throttle valve J being to throttle the air and prevent
any sudden rise of the bucket, thus securing that it shall ascend at a determined
speed.
To lower the bucket, all that is necessary is to close the steam valve H by
the starting lever K and open the exhaust 0. The piston will then ascend drawing
in air through the air inlet valve I and the bucket descends by its own weight.
The valve I can be regulated if desired so that it will adjust to a nicety the
admission of air and consequently the speed of descent of the bucket with load,
the throttling of the exhaust steam acting as a cushion to the piston in its
return stroke, thus also regulating the speed of ascent. The amount of steam
required to operate the piston is small.
Referring to the valve with which the motive power cylinder C is provided,
this valve consists of a slide or long D valve P fitted to slide on ports in the
steam chest Q and worked by a hand lever K on the outside working the
spindle N. This D valve controls two ports, one R leading to the steam
cylinder for the supply of live steam, and the other port S leading direct to
the throttle valve aforesaid. In operating the hoist therefore, all that is
necessary is to move the handle K so as to open the live steam port R. and let
steam into the cylinder on the upper side of the piston to raise the load. To
lower the hoist all that is necessary is to move the hand lever K in the opposite
direction, thus closing the steam port R and opening the exhaust port S which
leads to the throttle valve 0. The steam being throttled by this valve only
gradually leaves the cylinder and consequently the load descends at a uniform
speed proportionate to that at which the steam can escape from the cylinder.
The throttle valve however can be regulated by hand so that it will adjust
to a nicety the exhaust, and consequently the speed of descent of the load, the
throttling of the exhaust steam acting as a cushion for the piston in its return
stroke so as to secure the descent at any speed required.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In hoists in which multiplying pulley sheaves are used to increase the
travel of the load, the combination for motive power of a cylinder with piston,
to the rod of which the running pulley sheaves are attached, and a throttle valve
in the bottom end of the cylinder adapted to throttle the passage of air to any
required extent, whereby if steam be let into the cylinder on the upper side of
the piston, the air below being throttled by the valve only gradually leaves the

page_text: cylinder, and consequently the load rises at a uniform speed proportionate to
that at which the air can escape, substantially as described.
2. In hoists, the use or employment as motive power of a cylinder having a
piston, to the upper side of which steam or other fluid is admitted, the lower
side being provided with a throttle valve and also with a clack valve, the latter
adapted to freely admit air into the cylinder, but to prevent its return, whereby
if steam or other fluid be admitted into the upper end of the cylinder above the
piston, the air below being throttled by the throttle valve will only gradually
leave the cylinder, and the load will rise at a uniform speed, its descent being
similarly controlled by throttling, the exhaust steam, thus acting as a cushion.to
the piston on its return stroke, substantially as described.
3. In hoists the combination with a motive power cylinder of a steam valve
consisting of a slide or long D valve fitted to slide on ports in the steam chest
and worked by a hand lever on the outside in combination with a throttle or
controlling valve which will regulate the exhaust as required whereby the exhaust
steam can be adjusted to a nicety, and the speed of descent of the load thereby
regulated as required, substantially as set forth.
TL 1
11/1
1000
WM. P. THOMPSON & Co.,
Patents Agents, of Liverpool, Manchester, Birmingham and London.