MENTS IN GAS MOTORS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Harry Holden at the
Office of the Commissioners of Patents on the 5th July 1883.
HARRY HOLDEN Engineer of Manchester in the County of Lancaster "IMPROVE
MENTS IN GAS MOTORS
"
My Improvements relate more particularly to that class of motor engines where
a combustible mixture of gas and air is drawn into the cylinder and exploded
therein during a portion of the outstroke of the piston causing the latter to move
and impart motion to a crank shaft by any well known mechanical means and on
the return or instroke of the piston does expel the residuum of combustion,
through an exhaust valve, thus firing every revolution. The object of any
Invention is to ensure a greater certainty of firing or igniting a combustible.
mixture of gas and air in the cylinder at the right moment and consists in the
first place in employing a partially rotating disc which is provided with a number
of radial passages for the purpose of admitting a given volume of air and gas into
a port leading into the cylinder. The said partially rotating disc is also formed
with a cavity or chamber which is provided with a light the latter being brought
into contact with the ingoing mixture of gas and air during a portion of the
outstroke of the piston and thereby igniting the mixture. The second part of my
invention consists in the employment of a small pump for the purpose of pressing
a small quantity of gas and air into a reservoir and afterwards allowing the same
to come into contact with a heated metal tube and simultaneously admitted into
the port of the cylinder through suitable openings, for the purpose of igniting the
charge therein.
A third part of my invention has for its object the reduction of the excessive
wear and tear so common in ordinary slides and consists in substituting a valve
which may be mechanically moved or otherwise and of any suitable shape, with a
perforated seat for the admission of gas and air in combination with another
valve.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Harry Holden in the Patent Office on the 5th January 1884.
HARRY HOLDEN of Manchester in the County of Lancaster Engineer. "IMPROVE-
MENTS IN GAS MOTORS
و"
My improvements relate more particularly to that class of gas motor engines
where a combustible mixture of gas and air is drawn into the cylinder and
exploded therein, during a portion of the outstroke, causing the latter to move
and impart motion to a crank shaft by any well known mechanical means, and on
the return or instroke of the piston does expel the residuum of combustion
through an exhaust valve, thus firing every revolution. The object of my
invention is to insure a greater certainty of firing, or igniting a combustible
mixture of gas and air in the cylinder at the right moment and consists in
employing a partially rotating disc which is provided with a number of radial
passages for the purpose of admitting a given volume of air and gas into a
port leading into the cylinder. The said partially rotating disc is also formed with-
a cavity or chamber which is provided with a light, the latter being brought into
contact with the ingoing mixture of gas and air during a portion of the outstroke
of the piston, and thereby igniting the mixture. The second part of my invention
consists in the employment of a small pump for the purpose of pressing a small
quantity of gas and air into a reservoir and afterwards allowing the same to come
into contact with a heated metal tube, and simultaneously admitted into the port.
of the cylinder through suitable openings, for the purpose of igniting the charge
therein.
A third part of my invention has for its object the reduction of the excessive
wear and tear so common in ordinary slides, and consists in substituting a valve
which may be moved mechanically, or otherwise and of any suitable shape, with
a perforated seat for the admission of gas and air in combination with another
valve.
.
And in order that the invention may be more fully understood I have caused to
be appended hereto two sheets of drawings marked with letters of reference to
which I will now refer ;-
Fig 1. sheet 1. represents a side elevation and, Fig. 2 a plan in section at the
line of my improved gas motor.
Fig 3. Sheet 2. represents a front elevation. Fig 4, represents a plan of the slide
fixed between the valve face, cast with the body of the engine and the partially
rotating disc showing the air and gas passages.
Fig 5. is a plan of the partially rotating disc working between the fixed disc
and the end disc showing the ports and passages of the face which works against
the fixed disc and the end disc. Figs. 6. 7 & 8, represent two cross-sections and
a plan of my improved valve in substitution for the ordinary slides in gas
engines.
Referring to Figs 1. 2. 3. 4. 5. A. is the cylinder cast with the body of the
engine frame and surrounded by a water-jacket B; C is the piston working in the
cylinder and connected to the crank-shaft D. by. means of the connecting rod F.
On the shaft G. is fixed the partially rotating valve-disc H, which, is actuated from
an eccentric I, fixed on the crank-shaft D by the rod L and crank-lever M. N is
the valve part cast with the frame of the engine, to the side of which is connected.
the main gas inlet valve O. The latter is opened and closed at certain intervals,
by means of an eccentric P. rods Q, lever R, valve-spindle S. and spring T. The
valve part N is on its side provided with the air-inlet U, and draft-opening a, and

page_text: at its lowest part with the master-light V,-b is the explosion port leading to the
cylinder. c is the gas port leading from the main gas-inlet-valve, and d d are the
air passages leading from the air chamber e. The fixed disc W is also provided
with a draft opening a, gas ports c, air-passages d, igniting-chamber f, and
explosion port b, and gas channel g. The partially rotated disc ✗, is formed with
corresponding air-passages e igniting chamber f, draft opening a and gas and air
mixing chamber h Next to this partially rotating disc is fixed the end disc Y,
provided with water-jacket i, and chimney k, and water inlets l. On the back
part of the engine is fixed to the exhaust port m, the exhaust valve z,. The latter
is actuated from a cam u fixed on the crank-shaft p, by means of a bell-crank
lever 9, and rod v, lever 8. and spring t, The operation of the engine is as follows;
assuming the piston C, is at the dead centre inwards, by a further movement it
draws in a charge of air and gas through the ports f from the mixing chambers h,.
After the piston and crank have travelled approximately to the position shown in
Figs 1 and 2, the partially rotating slide is so timed as to immediately cut off the
connection with air and gas and bring the igniting chamber finto contact with
port a', after having been previously charged with a laden flame by the gas port c
and thus igniting the gaseous mixture. In my provisional specification mention
is made of the employment of a small pump for the purpose of pressing a small
quantity of gas and air into a reservoir, and afterwards allowing the same to come
into contact with a heated metal tube, and simultaneously admitted into the part
of the cylinder through suitable openings, for the purpose of igniting the charge
therein, but in practice I have found that this arrangement does not answer to
advantage and I therefore do not wish to make any claim for it.
Referring to Figs 6. 7. & 8, A. represents my improved valve in substitution
for the ordinary slides for the purpose of mixing the gas and air previous to
admitting the same to the explosion chamber. u is the valve casing, the valve
moved mechanically or otherwise w the spindle, a the air-inlet and y is the gas
inlet.
Having thus described and set forth the nature of my invention and the manner
of performing the same I would have it to be understood that I do not confine
myself to the exact arrangement shown, as the same may be modified without
departing from the principle of my invention and I claim.
CLAIMS
First The arrangement of gas and air inlet ports and mixing chamber, igniting
ports, explosion chamber, draft-chamber in a partially rotating disc or
slide for the purpose of insuring a greater certainty of firing and
igniting a combustible mixture of gas and air, in the cylinder at the
right moment as substantially described and illustrated by drawings
annexed.
Second. The general arrangement and construction of part and parts alike
and in combination, substantially as set forth and hereinbefore described.
Third The construction of the valve serving as gas and air inlet and mixing
chamber, substantially as illustrated and described.
In Witness whereof I the said Harry Holden have hereunto set my hand
and seal this twenty-eighth day of December. AD. 1883.