Improvements in and relating to Steam Engines.
Year: 1893

page_text: Date of Application, 15th Dec., 1893
Complete Specification Left, 14th Sept., 1894-Accepted, 20th Oct., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by NICOLAS ROSER, of 38, Rue de la Briche,
St. Denis, in the Republic of France, Builder.]
Improvements in and relating to Steam Engines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:-
The steam
This invention relates to a direct-acting steam engine which is suitable for
various uses. I will proceed to describe the same as applied to a pump.
The steam cylinder and pump cylinder are mounted upon the same frame, the
rods of the two pistons being in the prolongation of each other.
cylinder is provided with a distributing slide valve the rod of which receives a
reciprocating movement by the action of a piston arranged in a small cylinder.
The steam is admitted to one or the other side of this piston by means of ag
rotary disc valve. This disc valve is mounted upon an axis which carries a cam
baving a groove with which engages a roller fixed to the rod of the pistons and
designed to impart by its reciprocating movement an alternating angular dis-
placement to the said cam and consequently to the said rotary disc valve.
Steam is admitted into the 'box of the slide valve through a pipe, and it can
enter the cylinder for the small piston through a passage provided in the interior of
a stay piece of the frame.
The escape of the steam takes place by means of the aforesaid small cylinder.
through a passage in the interior of the stay piece of the frame, which passage
terminates in the steam exhaust channel of the steam cylinder.
In the seat of the rotary disc valve are pierced four apertures, two of which
correspond to the admission of steam to one or the other side of the small piston.
The third aperture serves for the escape of the steam and the fourth for the
The latter is
admission of steam to the box containing the rotary disc valve.
pierced through and through with two round apertures which must communicate
A third elongated
alternately with corresponding apertures in the valve seat.
aperture also pierced through and through in the rotary disc valve serves for the
admission of steam to the said box. The disc valve is moreover provided with
an elongated cavity designed to put the escape orifice in the valve seat in connec-
tion with one or the other of the first-mentioned two orifices therein.
When the piston in the steam cylinder has arrived at the end of its stroke say
to the right the roller fixed to the rod of the pistons causes the cam to turn,
The steam coming
which latter in its movement turns the rotary disc valve.
from one of the passages in the said stay-piece passes through the third aperture
in the disc valve into the box in order to be admitted through one of the round
apertures in the disc valve and a corresponding aperture in the valve seat to
the right hand side of the piston in the small cylinder. This piston is then
displaced to the left and the distributing valve of the steam cylinder uncovers one
of the admission ports to the steam which will then push the piston to the left.
In this position the orifice will be in front of the above-mentioned elongated cavity
for the escape of the steam. Having arrived at the end of its movement the roller
will turn the cam so that the left-hand side of the piston in the small cylinder
will be put in communication with the steam admission through the before-
mentioned first orifice in the valve seat and the second orifice therein which
communicates with the exhaust. The small piston will be pushed to the right

page_text: and carry away the slide valve which will then uncover the second part of the
steam cylinder.
Dated this 15th day of December 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in and relating to Steam Engines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 à direct-acting steam engine which is suitable for
By way of example I will proceed to describe the same as applied to
various uses.
& pump.
In the accompanying drawing
Figure 1 is a side elevation.
Figure 2 is an horizontal section.
Figure 3 is a transverse section on the line M-N of Figure 1.
Figure 4 is a section on the line P-Q of Figure 1.
Figure 5 is a transverse section on the line R-S of Figure 6.
Figure 6 is a longitudinal section on the line T-U of Figure 5.
The steam cylinder A and pump cylinder B are mounted upon the same frame C,
the rods D and D' of the two pistons being in line with or a prolongation of each
other. The steam cylinder is provided with a distributing slide valve T the rod of
which receives a reciprocating movement by the action of a piston E arranged in a
small cylinder F. The steam is admitted to one or the other side of this piston by
This disc
means of a rotary disc valve G shown in detail in Figures 7 and 8.
valve G is mounted upon an axis H which carries a cam I having a groove with
which engages a roller a fixed to the piston rods and designed to impart by its
reciprocating movement an alternating angular displacement to the said cam I and
consequently to the said rotary disc valve G.
Steam is admitted into the steam chest L of the slide valve T through a pipe t,
and it can enter the cylinder F for the small-piston E through a passage b provided
in the interior of a stay piece c of the frame.
The escape of the steam takes place by means of the aforesaid small cylinder E
through a passage in the interior of the stay piece c' of the frame, which passage
terminates in the steam exhaust channel of the steam cylinder A.
In the seat J of the rotary disc valve G are provided four apertures, a', a², as
and a Figures 2, 3 and 9; two of which a', a correspond to the admission of
steam to one or the other side of the small piston E. The third aperture a³ serves
for the escape of the steam and the fourth a' for the admission of steam to the
steam chest or box K containing the rotary disc valve G. The latter is provided
with two round apertures a' and a which must communicate alternately with
corresponding apertures a¹ and a² in the valve seat J. A third elongated aperture a
also provided in the rotary disc valve G serves for the admission of steam to
the said box K. The disc valve is moreover provided with an elongated cavity a
designed to put the escape orifice in the valve seat in connection with one or the
other of the orifices a', a' therein.
The operation of the engine is as follows:-When the piston in the steam
cylinder A has arrived at the end of its stroke say to the right the roller a fixed to
the piston rods causes the cam I to turn to the position shown in Figure 10

page_text: operating in its movement the disc valve G. The steam coming from 6 will pass
through the aperture a' in the disc valve into the box K in order to be admitted
through one of the round apertures a in the disc valve and a corresponding
aperture a in the valve seat to the right hand side of the piston E. This piston is
then displaced to the left and the distributing valve T of the steam cylinder A
uncovers the admission port to the steam which will then push the piston to the
left. In this position the orifice will be in front of the above-mentioned elongated
cavity as for the escape of the steam. Having arrived at the end of its movement
the roller a will turn the cam I to occupy the position shown in Figure 11; so that
the left-hand side of the piston E in the small cylinder will be put in communication
with the steam admission through the before-mentioned first orifice a¹ in the valve
seat and the second orifice a' therein which communicates with the exhaust. The
small piston E will be pushed to the right and operate the slide valve T which will
then uncover the second port f¹ of the steam cylinder A.
I may apply this engine for driving a pump direct or for any other purpose, and
I may construct the same of any dimensions and for any desired power.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
The herein before described system of direct-acting steam engine presenting as a
characteristic feature, the operation of the slide valve by a small piston upon
which the steam distributed by an oscillating plane circular slide valve acts, the
seat of which valve carries a cam which receives a rocking movement from a roller
or button on the piston rod of the engine at each end of the stroke of this piston,
the connections for the admission and escape of the steam of this small circular
slide valve being established through hollow rods or stay pieces terminating at the
steam chest of the principal slide valve.
Dated this 14th day of Sentember 1894
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.