Improvements in Gas and Oil Engines.
Year: 1899

page_text: Date of Application, 22nd July, 1899-Accepted, 26th Aug., 1899
5
COMPLETE SPECIFICATION.
Improvements in Gas and Oil Engines.
I, JOSIAH WALTON, of Rushey Terrace, Acocks Green, in the City of Birming-
ham, Gentleman, 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 improvements in the construction of engines worked
by explosive fluids, and commonly known as gas or oil engines.
The invention is applicable to such engines having one or more cylinders as
required, and my object is to simplify the construction of the valve mechanism,
thus reducing the first cost, and avoiding much wear and tear, and liability of
the delicate parts now used, getting out of order.
Also by my arrangement 1 am enabled to shut off any of the cylinders when
little power is required, or bring any or all into use as desired.
The annexed sheets of drawings illustrate how my invention is carried into
practice in the construction of a two cylinder engine, similar letters and numerals
indicate similar parts in any of the figures in which they occur.
Fig. 1, is an elevation of a two cylinder engine made according to my
invention.
Fig. 2, a plan of same.
Fig. 3, end view of same with the valve box sectioned to show the valve.
Fig. 4, the valve, showing the outer face.
Fig. 5, the inner face of same.
Fig. 6, section of same through xx.
Fig. 7, outer face of four-cylinder valve.
Fig. 8, inner face of same.
My invention relates more particularly to the construction of a revolving disc-
valve in which are contained all the ports required to admit the charges of air
and gas to the cylinders, and the passages for discharging the exhaust.
In carrying out my invention in the construction of a two cylinder engine
as shown in the drawings, for example, I arrange the two cylinders C¹ and Ca
to face each other, and support them upon a suitable bed plate B.
These parts with the pistons, piston rods R, and the crank shaft S, to which
they are connected and which carries the fly wheel, are of the usual character
and form no part of my invention.
The valve V, is constructed in the form of a disc with a boss or sleeve L pro-
jecting centrally from its outer face, through which the crank-shaft passes,
and upon which it revolves.
It is enclosed within a casing H, which is situated equidistant from each
cylinder but a little to one side of same, and is caused to revolve at exactly half
the speed of the crank shaft S, by means of speed reducing gear of any con-
struction, but preferably as shown which consists of a train of four wheels, the
irst W, being secured upon the shaft S, and gearing into W2, connected with
W3, which gears into W, which is fixed upon the sleeve L of the valve V, which
as before stated revolves loosely upon the shaft S, in the same direction but at
alf the speed.

page_text: Through the lid of the valve casing H, are ports to admit the supply of air
for each cylinder, they are marked A' and A2, there being one for each cylinder;
there are also corresponding inlets for gas G and G2, these being connected
with the gas supply in the usual manner.
These air and gas entrances open against the back or outer face of the valve V,
shown in Fig. 4, and are continued in the face of the valve chest on the opposite
side of the valve, where they form a channel or passage P, to the back end of
each cylinder, and to the firing or ignition tube I.
The valve is provided with concentric segmental slots shown in Fig. 4, which
are cut completely through the valve, and are so placed that they come opposite
to the before mentioned air and gas inlets in the lid of the valve casing during
each revolution, and will thus connect the said inlets with the passages to the
cylinders.
These slots through the valve are marked A3 and A4 the narrow ones for
gas G and G; they vary in length, because they pass the inlets at varying
speeds, and each must allow the same quantity of air and gas to be passed through
to its cylinder.
When the valve slots are thus passing the inlets, the piston is moving out-
wards and thus drawing in a charge of the mixed gas and air, the slots having
now passed the inlets, the passage is closed and the piston returning compresses
the charge which is fired at the moment the piston passes the dead centre or
commences to return, and the impulse is given.
When the piston commences its return stroke a chamber formed in the inner
face of the valve forms a communication with the hitherto closed passage P,
and the exhaust passage E, through which the products of combustion are
expelled.
The exhaust chambers in the valve are marked E¹ and E2, and the operation
above described is repeated for each cylinder.
It will be noticed that in order to leave the required solid facing upon the
valve at the part marked J, the exhaust passage E¹, is carried behind this part,
as is clearly seen in Fig. 6; these exhaust passages are also indicated by dotted
lines in Fig. 4.
In a three cylinder engine, another set of inlet ports for gas and air, and an
exhaust passage are required, and in a four cylinder engine there are four sets
of inlet and outlet passages, these are shown in Fig 7 and 8, which represent
the outer and inner faces of the valve for four cylinders, with the arrangement
of the various ports.
Fig. 7, shows the inlet gas and air ports marked 1, 2, 3, 4, and Fig. 8 shows
the inner face with the exhaust passages marked 1ª, 2, 3, 4ª, it being under-
stood that the spent gases enter the valve by the openings nearest the periphery
and discharge from the openings close to the centre; the dotted lines show the
interior form of the passages. Except in the one cylinder engine, an impulse is
given to each cylinder at every revolution of the crank.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
.1. In a motor engine worked by explosive fluid, and wherein a single cylinder
may be used, or two, three or four cylinders may be combined, a rotary disc
valve provided with all the ports or passages for performing all the required
functions of admission of gas and air, and also of exhausting the products of
combustion constructed as herein before described and set forth.
2. In a motor engine of the kind referred to in the first claim, a disc valve
provided with all the ports necessary for admission and discharge, revolving con-
centrically with, but at half the speed of the crank shaft, substantially as here-
in before described and shown.
3. A gas engine of two, three, or four cylinders, having a disc valve V, situated

page_text: between the cylinders provided with concentric segmental passages for the
admission of gas and air; communicating at each revolution with passages P
to the cylinders, and with the exhaust passage E; said valve V, being caused to
revolve at half the speed of the crank shaft S, supplying, controlling and exhaust-
ing all the cylinder's substantially as herein before described.
תונת
ROBT. F. DRURY, C.P.A.,
Agent for Applicant,
Bank Buildings, George Street, Sheffield.
ROBT. F. DRURY, C.P.A.,
Agent for Applicant,
Bank Buildings, George Street, Sheffield.