Year: 1887

page_text: Date of Application, 1st Jan, 1887
Complete Left, 3rd Oct:, 1887
Complete Accepted, 15th Nov., 1887
Actuated by Steam or other
We, JAMES WILLIAM RESTLER of Nunhead in the County of Surrey, Engineer and
ARCHIBALD TURNER of 1. Crowhurst Road Brixton in the County of Surrey, Engineer
do hereby declare the nature of this Invention to be as follows:-
Our Invention has for its object the balancing or partial balancing of the slide valves
of steam compressed air hydraulic or other engines or pumps in order to reduce the
friction and consequent difficulty of working which generally accompanys the use
of ordinary slide valves.
In carrying out this Invention we admit the steam, air, gas, or other fluid to the
engine through suitable ports or passages to the interior or under side of a valve
hereinafter described and exhaust past the ends or through ports, passages or
chambers near the ends of the said valve.
The lifting of the valve from the port face due to the pressure of the steam air
or other fluid underneath is prevented by the pressure of the exhaust fluid on the
exterior or top side of the valve, the amount of surface exposed to the exterior or
lower pressure, being greater than that exposed to the interior or higher pressure, the
amount of surplus pressure tending to keep the valve on the face of the port face,
being regulated by the area of the admission ports in the interior of the valve, the
total area of the outer surface of the valve in contact with the face of the cylinder
ports and the respective pressures of the initial and final fluid in the cylinder.
Our improved slide valve is made of a closed box form the bottom of which slides
on the port face and has through it a suitable port or ports for the admission of the
fluid to the interior and the steam lap when required is formed on the inner or steam
side.
When the valve is used in connection with a steam cylinder which exhausts into a
condenser the exhaust from the cylinder can be led past the end of the valve, into
another port or ports forming passages or chambers in the valve and the pressure of
the atmosphere depending on the amount of partial vacuum in the condenser can then
be utilised in keeping the valve up to its face.

page_text: The valve may be prevented from lifting off its face on the starting of the engine.
by means of suitable stops on the back of the valve or by means of steam compressed
air or other fluid admitted to the steam chest on the outside of the valve or by both
means combined.
A permanent pressure may be maintained on the back of the valve by means of
fluid under pressure admitted by suitable pipes or connections such pressure being
regulated so that the total pressure on the outside of the valve in contact with the
face of the ports is slightly in excess of the total unbalanced pressure underneath, the
latter modification with a suitable valve & ports being especially applicable to slide
valves for hydraulic purposes.
The valve may be worked by a rod passing through a stuffing box in the steam
chest and worked by an eccentric or other gear in the usual manner.
When the valve is combined with cut off or expansion plates the interior of the
valve is provided with a face or faces whereon the expansion plates work, the
expansion valve rod passing out of the main valve through a stuffing box in the main
valve itself or the rod may pass through the centre of the main valve rod and be kept
tight where it leaves the main rod by a stuffing box or other suitable means.
Covers or other means may be provided in the valve to give convenience of access
to the expansion valves faces and the interior ports of the main valves.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said J. W. Restler
and A. Turner.

page_text: .
Improvements in or Connected with the Slide Valves of Engines
Actuated by Steam or other Motive Fluid.
We JAMES WILLIAM RESTLER of Nunhead in the County of Surrey Engineer and
ARCHIBALD TURNER of 1 Crowhurst Road Brixton in the County of Surrey
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:-
Our Invention has for its object the balancing or partial balancing of the slide
valves of steam, compressed air, hydraulic, or other engines, in order to reduce the
friction and consequent difficulty of working which generally accompanies the use of
ordinary slide valves.
In carrying out this Invention we admit the steam air gas or other fluid to the
engine through suitable ports or passages to the interior or underside of a valve of a
box form, and having but one face upon which the said valve works as hereinafter
described and exhaust takes place outside the valve, or the port thereof into which the
inlet steam passes, past the ends or through ports passages or chambers near the ends
or any suitable part of the said valve.
The pressure of the exhaust fluid on the exterior or top side of the valve prevents
or assists in preventing the lifting of the valve from the port face due to the pressure
of the fluid underneath, the amount of surface exposed to the exterior or lower
pressure being such that the pressure on the exterior of the valve is greater than that
which the interior or portion exposed to the higher pressure is subjected so that the
excess of pressure on the exterior or top side of the valve tends to keep the valve on
the port face; the said pressure being regulated by the area of the inlet and outlet
ports the total area of the outer surface of the valve in contact with the face of the
Cylinder ports, supplemented by the area of the recesses or cavities, hereinafter
described, formed between the ports on the Cylinder or valve face or between both, and
the respective pressures of the initial and final fluid in the Cylinder, and the pressure or
partial vacuum which is maintained in the said recesses or cavities.
Figures 1 and 2 of the accompanying drawings represent in vertical and horizontal
sections respectively our Invention (combined with a cut off or expansion slide)
applied to the high pressure Cylinder of a compound Engine the valve of the low
pressure Cylinder being in this case of the ordinary kind. Figures 3, 4 and 5 are
respectively a longitudinal section a transverse section and a plan of underside of a
simple form of the valve according to our Invention and figure 6 is a transverse
section shewing the valves applied to the high pressure Cylinder and the intermediate
pressure Cylinder of a triple expansion Engine the valve applied to the low pressure
Cylinder being also in this case of the ordinary kind.
Our improved slide valve constructed according to this Invention is in the form of a
box A that is it is entirely closed except where it slides on the port face of the

page_text: Cylinder the bottom a only of which slides on a port face in the steam chest B of
the Cylinder C the said box valve A having through it a suitable port (or ports) c for
the admission of the motive fluid from the steam or fluid passage e² to the interior of
the said box valve A, and the steam (or other motive fluid) lap when required is
formed on the inner (or steam or other motive fluid) side. are the motive fluid
outlets from the valve to the inlet ports or passages to the Cylinder. The
passages c also open for exhaust from the Cylinder past the ends of the box valve A.
Recesses or cavities are formed between the ports in the valve or cylinder face or in
both. Suitable pipes or passages may be provided to connect these recesses or cavities
either with the atmosphere or with a steam chest or a Cylinder at a lower pressure
than the steam or other fluid pressure either on the outside or inside of the valve or
they may be connected with the partial vacuum of a condenser.
When the valve is used in connection with a steam Cylinder which exhausts into a
condenser, the exhaust ports from the Cylinder may be led through a suitable port or
passage formed in the valve, into the exhaust port leading to the Condenser, and the
pressure of the atmosphere depending on the amount of partial vacuuin in the
condenser can then be utilized in keeping the valve up to its face.
The valve may be, on the starting or during the working of the Engine, prevented
from any tendency to lift off from the face on which it works by means of suitable
stops at the back of the valve (such as are shewn at e in Figure 2) or by means of
steam compressed air or other fluid under pressure admitted to the steam chest on the
outside of the valve or by means of springs or by all or any of these means combined.
A permanent pressure may be maintained on the back of the valve by means of
fluid under pressure admitted by suitable pipes or connections such pressure being
regulated so that the total pressure on the outside of the valve in contact with the face
of the ports is slightly in excess of the total unbalanced pressure underneath; the
latter modification with a suitable valve and ports being especially applicable to slide
valves for hydraulic purposes.
The valve may be worked by a rod passing through a stuffing box g in the steam
(or other motive fluid) chest and worked by an excentric or other gear in the
usual manner.
When the valve is combined with cut off or expansion valves or plates (as shown in
Figure 1) the said valves or plates are situated inside the box valve A and the
interior of the valve is provided with a face or faces whereon the expansion plates
or valves i work the expansion valve rod j either passing out of the main valve through
a stuffing box in the main valve itself; or (the arrangement shown in Figure 1) the
rod may pass through the centre of the main valve rod and be kept tight where it
leaves the inain rod by a stuffing box or other suitable means.
Covers as at k or other means may be provided in the valve to give convenience of
access to the expansion valves, faces, and the interior parts of the main valves.
Having now particularly described and ascertained the nature of this Invention
and in what manner the same is to be performed we declare that what we claim is :-
--
The valve for steam or other motive fluid engines, constructed substantially as
hereinbefore described and illustrated in the accompanying drawings with or without
the expansion or cut off plates or valves situated inside the box formed by the valve
substantially as hereinbefore described and illustrated in the accompanying drawings.
Dated this 3rd day of October 1887.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London,
Agents.