An Invention for the Purpose of Supplying Cold Air to the Cylinders of Oil and Spirit Motor Engines.
Year: 1898

page_text: An Invention for the Purpose of Supplying Cold Air to the Cylinders
of Oil and Spirit Motor Engines.
I, THOMAS WILLIAM MARSHALL, of Beverley, in the County of York, Corn Mer-
chant, do hereby declare the nature of this invention to be as follows; -
The addition to and the adapting to the use of the present oil and spirit motor
engines of an inlet or valve for the purpose of supplying cold air to the cylinder
for cooling and other purposes thus doing away with the compression of hot air
and minimizing the wear and tear of the engine.
Dated this 10th day of December 1898
BARLOW & BARLOW,
165, Fenchurch Street, E.C.,
Agents for the above named Thomas William Marshall, the Applicant.
An Invention for the Purpose of Supplying Cold Air to the Cylinders
of Oil and Spirit Motor Engines.
I, THOMAS WILLIAM MARSHALL, of Beverley, in the County of York, Corn Mer-
chant, 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 oil or spirit motor engines of the kind used for driving
carriages, cycles or the like and has for its object to supply cold air to the cylinder
or cylinders to be mixed with the oil spirit or gases to make them explosive and
also to minimise the wear and tear of the motors by doing away with the com-
pression of hot and exploded gases or fumes.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a sectional view of part of the cylinder of an oil gas or spirit motor
engine with my improvement applied a water jacket being shown as surrounding
the valve.
Fig. 2 is a similar view to Fig. 1 but without a water jacket.
For the purpose of my invention I enlarge the head of the cylinder A and form
a chamber B provided with a valve C which beds on a seat D formed by the walls
of the said chamber or an air inlet E runs into such chamber from the outside
of the cylinder shell or casing.

page_text: The valve spindle F is provided with a spiral-spring G one end of which bears
on the enlarged part of the cylinder, the other end being attached to the said valve
spindle.
The air chamber B may be surrounded by a water jacket H as shown at Fig. 1
for the purpose of assisting in keeping the valve cool a passage J is run from the
air chamber B to the cylinder A where it is led in at the back of the piston this
passage has an outlet to the open air which is covered by a cap stud or the like K
by which admission is gained to the said air chamber and valve for repairing
cleaning or similar purposes. The valve is operated by means of a device or devices
of any suitable kind such as a cam or cams on the crank shaft which bear on the
bottom of the valve spindle and raise it at regular intervals, the spiral spring keep-
ing the valve closed until such time as the spindle is pushed up by the operating
device when the spring is compressed and the valve lifted off its seat.
The valve C is an additional one and is independent of the ordinary induction
valve, and exhaust valve employed in motor engines employed for driving vehicles
or cycles commonly known as motor cars or motor cycles.
Where two or more cylinders are employed an air admission valve such as C
will be employed for each cylinder in addition to the induction and exhaust
valves generally used.
When my supplementary air valve C is used if the motor is running above its
nominal speed such air valve is opened at every revolution or every other revolu-
tion of the crank or as often as is required so taking in pure cold air and passing
it out through the exhaust so running it on cold air only, but the valve may be
so timed to introduce cold air into the cylinder at any suitable number of revolu-
tions of the crank, to mix with the petrol spirit or gas to make them explosive
and for cooling the cylinder and reducing the friction on the engine. or motor
by preventing unnecessary friction within the cylinder and on the crank, by dis-
pensing with the continual compressing of hot and exploded gases or fumes.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. In motor engines for driving road vehicles or cycles, the employment of a
supplementary air inlet valve such as C, in the manner and for the purposes,
substantially as shown and described.
2. In connection with motor engines of the kind described, the combination of
an air inlet valve C, with the cylinder and the ordinary induction valve and
exhaust valve, in the manner and for the purposes, substantially as shown and
described.
3. The combination of an air inlet valve such as C, having a spindle F, pro-
vided with a spiral spring G, and operated by any suitable means, air chamber
or recess B, with inlet E, and passage J, with or without cap K, and water
jacket A, or not as desired, in the manner and for the purposes, substantially as
shown and described.
ted this eventh day of coruary 1.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Patent Agent for the Applicant.