A New Slide Valve to Distribute Steam to Two or Three Cylinders.
Year: 1890

page_text: Date of Application, 22nd Dec., 1890
Complete Specification Left, 22nd Sept., 1891-Accepted, 24th Oct., 1891
T
PROVISIONAL SPECIFICATION.
A New Slide Valve to Distribute Steam to Two or Three
Cylinders.
I, JOSEPH COOPER, of Headland, Ossett, in the County of York, Gardener, do
hereby declare the nature of this invention to be as follows:-
My invention relates to a method of constructing and arranging a slide valve in
such manner that it supplies steam and exhausts it from two cylinders and some-
times supplies steam to a third cylinder.
In carrying my invention into effect I form the valve casing between the
cylinders and fit the valve between two opposing faces on both of which faces the
valve works. The faces must be parallel to each other in the line of motion of
the valve but their planes may be inclined to each other at right angles to that
direction and the valve may thus be wedge shaped across, so that the fit to the two
faces may be adjusted by suitable means such as set screws and guiding pieces.
The opposing valve faces may be adjusted by other means as by forming the
valve in two parts and inserting packing plates or the cylinder valve faces may be
made adjustable.
The live steam is admitted to the valve casing and passes to the first or high
pressure cylinder by the steam edges of the valve opening alternately on either of
two ports.
These ports discharge through the valve by either of two passages to recesses on
the opposite side and steam is supplied from these recesses to either of two steam
ports in the second or low pressure cylinder.
Adjoining the two steam ports in the low pressure cylinder valve face are two
exhaust ports and when the exhaust stroke is to occur the valve moves'to place the
steam and exhaust ports in connection by means of the recesses hereinbefore
described. These recesses are closed to the high pressure cylinder before they
open on the low pressure exhaust.
My new valve thus by the use of two ports in H.P. cylinder and four ports
in L.P. cylinder readily operates to admit and exhaust steam to and from the two
cylinders.
The exhaust from the second cylinder may be discharged to a third cylinder
which may have a separate exhaust valve or the steam may discharge from the
second cylinder into the condenser.
LADA
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
A New Slide Valve to Distribute Steam to Two or Three
Cylinders.
I, JOSEPH COOPER, of Headland, Ossett, in the County of York, 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
My invention relates to a method of constructing and arranging a slide valve in
such manner that it supplies steam and exhausts it from two cylinders and some-
times supplies steam to a third cylinder.
Referring to Figures 1 and 2 of the accompanying sheet of drawings; in

page_text: carrying my invention into effect, I form the valve. casing E between the cylinders
and fit the valve C. between two opposing faces on both of which faces the valve
works. The faces must be parallel to each other in the line of motion of the valve
but their planes may be inclined-to each other at right angles to that direction,
and-the valve may-thus be wedge-shaped-across-as-at.C.Figure 2, so that the fit to
the two faces may be adjusted by suitable means such as set screws D¹, D2 and
guiding pieces as D: The opposing valve faces may be adjusted by other means as
by forming the valve in two parts and inserting packing plates, or the cylinder
valve faces may be made adjustable.
The live steam is admitted to the valve casing E-and passes to the first or high
pressure cylinder A by the steam, edges of the valve C opening alternately on
either of the two ports A', A²
These ports A', A discharge through the valve C by either of two passages C¹, C²-
to recesses on the opposite side, and steam is supplied from these recesses to either
of two steam ports B', B2 in the second or low pressure cylinder: The .high
pressure cylinder A. thus exhausts into the low pressure cylinder B..
Adjoining the two steam ports in the low-pressure cylinder-valve-face-are two..
exhaust ports B4, B³, and when the exhaust stroke is to occur the valve moves to
place the steam ports B or B2 and exhaust ports B or B³ in connection by means
of, the, recesses hereinbefore described. These recesses are closed to the high
pressure cylinder before they open on the low pressure exhaust. This is shown at
Figure 1, where the ports B and B are in communication for exhausting-the
upper end of the cylinder B, while the ports A2 and B2 are in communication
through-C for passing steam from the high pressure to the low pressure cylinder...
My new valve, thus, by-the-use-of-two ports-in-HP cylinder-and-four-ports-
in LP. cylinder readily operates to admit and exhaust steam to and from the two
cylinders. The exhaust-from-the-second-cylinder-may-be-discharged to a third
-cylinder-which-may-have-a-separate-exhaust-valve,-or-the-steam-may-discharge
from the second cylinder into the condenser.
In Figures 3 and 4 a third cylinder is applied. Here the cylinders are a, b, and c
and the valve is marked e at Figure 4. The steam_passes from the cylinder a to ↳
by the ports a',, and a², 62, as already described with reference to Figures 1 and 2,
but the exhaust from passes to by the ports c², c² instead of exhausting to the
air or a condenser. The ports d, d separated by a partition-serve to exhaust from
one end of e to the atmosphere or a condenser while d', d³, perform a like function
for the other end.. The slide valve e differs from C-only in having ports or grooves
which cover d, d' or d², dat suitable times as will be readily understood from the
preceding description.
t
Figure 5 shows a parallel faced valve with an adjusting wedge piece fl and
adjusting screws f³.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
(1) A slide valve distributing steam to two cylinders as A and B Figure 1,
having steam edges and two ports_as_C, C, with recesses, arranged to work
between opposing ports as 'A', A; B' and B2 and exhaust ports B3, B₁ substantially.
as hereinbefore described and illustrated.
(2) A slide valve as claimed under Claim 1, having added ports. to open the
ports as d, and d², 3, (Figure 3) so as to control steam supply and discharge to-
three cylinders substantially as herein before described and illustrated in the
drawings.
Dated this 21st day of September 1891
CLERK & MARKS,
13, Temple Street, Birmingham, Agents for the Applicant.