IMPROVEMENTS IN EQUILIBRIUM SLIDE VALVES
Year: 1872

page_text: LETTERS PATENT to Joseph Edlyn Outridge, of 1, Elm Villas, Catford
Bridge, Lewisham, Kent, for the Invention of "IMPROVEMENTS IN
EQUILIBRIUM SLIDE VALVES."
Sealed the 8th October 1872, and dated the 23rd April 1872.
PROVISIONAL SPECIFICATION left by the said Joseph Edlyn Outridge
at the Office of the Commissioners of Patents, with his Petition,
on the 23rd April 1872.
I, JOSEPH EDLYN OUTRIDGE, of 1, Elm Villas, Catford Bridge,
Lewisham, Kent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN EQUILIBRIUM SLIDE VALVES," to be as follows:-
The object of this Invention is a valve which is equilibrated so as to
obviate the wear and tear arising from the friction which has been found
so prejudicial with the common forms of valves at present in use.

page_text: The Invention consists in placing a table upon the face of the cylinder
so as to be stationary. This table may be either cast on the cylinder or
attached thereto by screws or otherwise. The interior face of the slide
moves or works upon the table, steam being admitted through an orifice
made in the back of the slide, and thus acts between the surface of the
table and the internal surface of the slide, thereby relieving the pressure
upon the external slide face. The surface of the table is of the same
area as the face of the valve, and thus the steam entering through the
aperture equilibrates or balances the pressure upon the face of the
cylinder. I prefer to make these slide valves of Bessemer or other steel:
or of wrought iron, but I of course use other metal as convenience may
dictate.
Although steam has been mentioned above, it is obvious that my
valves are capable of use with any other liquid or gas, and may be
applied to the purposes of irrigation, as sluice valves or otherwise.
The form of valve just described is more particularly applicable on
account of the great economy of space which it effects to inside cylinder
locomotives and to inverted marine steam engines, in both of which the
space is so small as not to allow sufficient room for the working of larger
valves whether equilibrated or otherwise.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Edlyn Outridge in the Great Seal Patent
Office on the 23rd October 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
EDLYN OUTRIDGE, of 1, Elm Villas, Catford Bridge, Lewisham, Kent, 2
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of April, in the year
of our Lord One thousand eight hundred and seventy-two, in tho thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give 3
and grant unto me, the said Joseph Edlyn Outridge, Her special licence
that I, the said Joseph Edlyn Outridge, my executors, administrators,

page_text: and assigns, or such others as I, the said Joseph Edlyn Outridge, my
cxecutors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN EQUILIBRIUM SLIDE VALVES," upon the condition (amongst others) that
I, the said Joseph Edlyn Outridge, my executors or. administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Scal Patent Office within six
calendar months noxt and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Joseph Edlyn Outridge, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement theroof, reference being had to the Drawings
hereunto annexed, that is to say:-
The object of this Invention is a valve which is equilibrated so as to
· obviate the wear and tear arising from the friction which has been found
. so prejudicial with the common forms of valves at present in use.
The Invention consists in placing a tablo upon or over the face of the
cylinder, stationary or not. This table may be either cast on the
5 cylinder or attached thereto by screws or otherwise. The interior face
of the slide moves or works upon the table, steam being admitted
through an orifice made in the back of the slide, and thus acts between
the surface of the table and the internal surface of the slide, thereby
relieving the pressure upon the external top and bottom slide face.
O The surface of the table is more or less of the same area as the face of
the valve, and thus the steam entering through the aperture equilibrates
'
or balances the pressure upon the face of the cylinder.
I prefer to make these slido valves of Bessemer or other steel or of
wrought iron, but I of course use other metal as convenience may
dintato

page_text: Although steam has been mentioned above it is obvious that my
valves are capable of use with any other liquid or gas, and may be
applied to the purposes of irrigation as sluice valves or otherwise.
The form of valve just described is more particularly applicable on
account of the great economy of space which it effects to inside cylinders
of locomotives and to inverted marine steam engines, in both of which
the space is so small as not to allow sufficient room for the working of
larger valves whether equilibrated or otherwise.
The Invention will be clearly understood by reference to the nocom-
panying Drawings, in which Figure 1 shows a plan view of the table A,
and Figure 2 an end view, the table having a foot B with lips a, a, for
resting upon the checks b, b, of the exhaust port c as shown in Figure 3.
The table A is dished or recessed on both sides, and with ledges or
faces d, d, to bear upon or against the under surfaces e of the valve
proper C or its top plate cover or strap D, the valve. being equilibrated :
by the pressure of the steam or other agent employed as the motive
power during the travel of the valve.
Figure 4 is a view of a modification. Here the table A is held to the
cover of the valve box by a screw pin or bolt E and the steam presses
upon its top sido, and, so to speak, floats the valve as in the former case.
Figure 5 shows a "doublo valve" (or two valves combined) with a table
between them and attached to one of them so that it moves with it.
This plan of construction is more specially applicable to locomotive and
other double cylinder engines, the connection between the table and
one of the valves being by a screw bolt as before. The closeness of the
touch of the valve or valves proper upon its or their seats can be
regulated by means of the table A to the greatest nicety, whereby the
valve or valves work almost without friction and yet permits of the free
passage of steam through the ports and an easy movement to the valve
rods while being shifted over to reverse or to start the engine.
Figure 6 is a view of a table of circular form enclosed within or
embraced by a valve of oval, rectangular, or of circular form, the upper
surface or edge of the table bearing against a ring. The pressure of.
steam is upon the top of this table only.
I do not in any way limit myself to the exact construction of valves

page_text: fixing (suspending or otherwise), or floating a table within or upon the
same, as the main feature of my Invention, and to which claim is herein
made, consists in the construction of slide valves equilibrated by a
table, substantially in the manner herein-before described and shown.
"
In witness whereof, I, the said Joseph Edlyn Outridge, have here-
unto set my hand and seal, this Twenty-third day of October
One thousand eight hundred and seventy-two.
Witness,
•
H. GARDNER,
166, Fleet Street,
London.
JOSEPH EDLYN OUTRIDGE. (L.S.)