Improved Valve Gear for Steam, Air, or Water Engines.
Year: 1898

page_text: Date of Application, 3rd Nov., 1898
Complete Specification Left, 2nd Aug., 1899-Accepted, 7th Oct., 1899
PROVISIONAL SPECIFICATION.
Improved Valve Gear for Steam, Air, or Water Engines.
I, SAMUEL ALFRED NELSON DELUCE, of 18, Bolton Road, Irlams-o'-th'-Height,
in the County of Lancaster, Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to means for actuating that kind of valve the rod of which
is provided at each end with pistons or plungers working in a cylindrical valve
casing, and moved to and fro by the steam or other fluid, and the invention is
specially designed for a steam pumping engine, but can also be applied to other
engines worked by steam air or water under pressure.
My improved arrangement when applied to a steam engine is constructed and
operates as follows:
I form a small passage in each of the pistons or plungers aforesaid so that the
steam which enters the valve casing in the centre between the pistons or plungers
can enter the spaces at the ends of the casing.
Each of these spaces are in communication by a separate passage (larger than
that through the adjacent piston or plunger) leading to one end of the valve
casing, where there is a circular facing against which works a flat circular hollow
valve or box which can oscillate on its centre, where it is provided with a suitable
spindle projecting through a stuffing box in the valve casing.
There is a space behind this valve or box connected by a suitable passage with
the steam inlet to the valve casing (or otherwise connected with the steam supply)
so that the pressure of steam will hold this valve against its facing.
In the centre of the latter is an opening into a passage leading to the exhaust
passages, and in the centre of the face of the flat box or valve is a similar opening
so that the interior of the latter is always open to the exhaust."
66
In the face of the valve or box are two holes in such a position with regard
to the openings in the facing which lead to the two ends of the main-valve casing
that when the oscillating valve or box moves to the end of its stroke in one
direction its interior is connected with one end of the piston valve casing, and at
the end of the oscillation of the valve or box in the reverse direction the other
end of the piston valve casing is in connection with its interior.
The valve or box is oscillated by a lever on its spindle which is worked by
the piston rod of the pump (or other suitable moving part of the engine). This
lever therefore alternately puts each end of the piston valve casing into communi-
cation with the interior of the oscillating valve or box, which forms an expansion
chamber into which the steam from that end of the piston valve casing can
expand, and from which it can escape to the exhaust. The pressure of the steam
at the other end of the piston valve will then force the said valve towards that
end of the casing from which the steam is escaping, until the connection is cut off
and the other passage of the piston valve casing opened, when the piston valve
will be forced to the other end of its casing.
75
1
1000
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.

page_text: Improved Valve Gear for Steam, Air, or Water Engines.
I, SAMUEL ALFRED NELSON DELUCE, of 18, Bolton Road, Irlams-o'-th'-Height,
in the County of Lancaster, Engineer, do hereby declare the nature of this
invention and in what mauner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
-
This invention relates to improved means for actuating that kind of valve the
rod of which is provided at each end with pistons or plungers working in a
cylindrical valve casing, and moved to-and-fro by the steam or other fluid, and
the invention is especially designed for a steam pumping engine, but can also be
applied to other engines worked by steam, air, or water, under pressure.
The manner in which my said invention is to be performed or carried into
practical effect will be readily understood on reference to the sheet of drawings
hereunto annexed and the following explanation thereof.
Fig. 1 on the drawings is a longitudinal section of my improved valve-gear
when applied to a steam engine, Fig. 2 an end elevation thereof, and Fig. 3 a
section through the line X-X in Fig. 1.
A is a portion of the steam cylinder facing, B the steam passages, and C a
portion of the steam piston. a is the cylindrical valve casing in which works
to-and-fro the valve consisting of two pistons or plungers united together by a
kind of valve-rod c. Through each of these pistons or plungers 6 I form a small
passage 6 so that the steam which enters the valve casing a in the centre between
the two pistons or plungers bb (as shown by the arrow on Fig. 1) can enter the
spaces at the ends of the casing a.
Each of these spaces d is in communication by a separate passage e or e* (larger
than the passage through the adjacent piston or plunger b) leading to one end
of the valve casing a (see right side of Fig. 1) where there is a circular facing f
against which works a flat circular hollow valve or box 9 which can oscillate on
its centre, where it is provided with a suitable spindle h projecting through a
stuffing-box a in the valve casing.
There is a space
behind this valve or box g connected by a suitable passage k
with the steam inlet to the valve casing (or otherwise connected with the steam
supply) so that the pressure of steam will hold the hollow valve g against its
facing f.
9
In the centre of the latter is an opening into a passage m leading to the exhaust
passages n, and in the centre of the face of the flat box or hollow valve is
a similar opening, so that the interior of the said valve g is always open to the
" exhaust."
In the face of the valve or box g (see Fig. 3) are two holes o and o* in such a
position with regard to the openings e and e* in the facing f which lead to the two
ends d of the main valve casing, that when the oscillating valve or box
to one end of its stroke in one direction its interior is connected with one end of
g moves
the piston valve casing a, and at the end of the oscillation of the said valve or
box in the reverse direction, the other end of the piston valve casing is in
connection with its interior.
The valve or box g is oscillated by a lever p on its spindle h which is worked
by the piston rod of the pump (or other moving part of the engine). This lever
therefore alternately puts each end of the piston valve casing a into communication
with the interior of the oscillating valve or box which forms an expansion
chamber into which the steam from that end of the piston valve casing can
expand, and from which it can escape to the exhaust.
The pressure of the steam at the other end of the piston valve b will then force

page_text: the said valve towards that end of the casing from which the steam is escaping,
until the connection is cut off and the other passage of the piston valve casing
opened, when the piston valve will be forced to the other end of its casing.
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:
The improved construction of automatic valve gear for steam, air, or water
engines substantially as hereinbefore described and illustrated by the drawings
annexed, and especially I claim the combination with a sliding piston valve of a
hollow valve or box oscillating on its centre in contact with a facing so arranged
as to admit the steam alternately to each end of the said piston valve substantially
as described and illustrated.
Dated this 1st day of drauat 1900
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.