Improvements in Gas and similar Motor Engines.
Year: 1893

page_text: Date of Application, 22nd Mar., 1893
Complete Specification Left, 22nd Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Gas and similar Motor Engines.
I, ALFRED ROWE BELLAMY, of Algoa Lodge, Adswood Lane, Stockport, in
the County of Chester, Engineer, do hereby declare the nature of this invention to
be as follows:-
In self starting gas and similar motor engines as at present constructed the first
impulse is either obtained by firing a charge of gas and air at atmospheric pressure
or firing a charge of gas and air under compression. In the first instance the power
obtained is insufficient to move the piston and revolve the crankshaft until the
engine gets into its proper working action especially if there be any resistance
against its free movement through the engine being arranged to drive direct on to
its work. In the second instance when firing a charge under compression the
shock to the parts is too severe, it being well known that to put an engine into
motion by instantaneously giving the piston a sudden shock is both inadvisable and
unmechanical.
The object of this invention is to arrange the starting so that a mixture of air
and gas at atmospheric pressure is first exploded while the piston is at rest, this
pressure sets the engine moving and after the piston has travelled a certain distance
a communication is effected with another chamber containing a second charge of
gas and air at atmospheric pressure which charge is compressed, and then fired by
the first explosion and thereby a second and powerful impulse is given to the piston
after it has been put into motion by the first explosion.
To effect this object I employ a reservoir or chamber connected with the gas
inlet and with the cylinder placed at any suitable distance from the latter.
In one arrangement the gas is admitted through a back pressure valve to the
compression space or chamber of the cylinder and simultaneously the gas also flows
into and fills the aforesaid reservoir or chamber which is provided with a suitable
valve to allow the products of combustion to escape.
The reservoir or chamber is connected with the cylinder preferably at a point
covered by the piston when the explosive charge in the combustion space or
chamber is ignited or it may be by a port controlled by a separate valve.
When the first explosion takes place in the cylinder the piston is driven outward
as usual, the pressure caused by the expansion of the gases resulting from the
ignition of the explosive charge drives the gas into the reservoir and compresses
it in advance of the flame which follows and ignites the explosive mixture thus
giving a second or supplementary impulse to the piston whereby additional power
is obtained.
Dated this 21st day of March 1893.
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Gas and similar Motor Engines.
I, ALFRED ROWE BELLAMY, of Algoa Lodge, Adswood Lane, Stockport, in
the County of Chester, Engineer, 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 :-
In self starting gas and similar motor engines as at present constructed the first

page_text: impulse is either obtained by firing a charge of gas and air at atmospheric pressure
or firing a charge of gas and air under compression. In the first instance the power
obtained is insufficient to move the piston and revolve the crankshaft until the
engine gets into its proper working action especially if there be any resistance
against its free movement through the engine being arranged to drive direct on to
its work. In the second instance when firing a charge under compression the
shock to the parts is too severe, it being well known that to put an engine into
motion by instantaneously giving the piston a sudden shock is both inadvisable and
unmechanical.
The object of this invention is to arrange the starting so that a mixture of air
and gas at atmospheric pressure is first exploded whilst the piston is at rest, this
pressure sets the engine moving and after the piston has travelled a certain distance
a communication is effected with another chamber containing a second charge of
gas and air at atmospheric pressure which charge is compressed, and then fired by
the first explosion and thereby a second and powerful impulse is given to the piston
after it has been put into motion by the first explosion.
To effect this object I employ a reservoir or chamber connected with the gas
inlet and with the cylinder and placed at any suitable distance from the latter.
And in order that my invention may be fully understood and readily carried into
effect I have annexed hereto a drawing showing in elevation, partly in section, a
gas or similar motor engine fitted with such an arrangement of reservoir for the
purposes of my invention.
In this view, a designates the cylinder, 6 the piston, c the crankshaft, d the
reservoir or chamber, e a pipe connecting the reservoir d to the cylinder a, fa tap
or valve controlling the pipe e, g the pipe which supplies gas or explosive fluid
through a back pressure valve to the compression space or chamber of the
cylinder a, and simultaneously through a back pressure valve i to the reservoir d
which is also provided with a suitable valve k to allow the products of combustion
to escape.
At starting gas is admitted through the pipe g to the compression space or
chamber of the cylinder a and simultaneously to the reservoir d thereby simul-
taneously forming an explosive fluid mixture at or about atmospheric pressure in
both places, the gas having driven before it a portion of the air or products from the
compression space or chamber of the cylinder preferably through the valve m in
communication with the ignition tube as fully described in the Specification to my
prior application for Letters Patent No. 4564 of 1893, and from the reservoir d
through the valve k.
The first explosion is caused by the explosive fluid mixture in the cylinder coming
in contact with the heated portion of the ignition tube in the manner fully described
in my aforesaid Specification No. 4564 of 1893.
When the first explosion takes place the piston b is driven outward until it
uncovers the port and pipe e communicating with the reservoir d. The flame from
the first explosion immediately ignites the explosive fluid mixture in the reservoir d
thus giving a second or supplementary impulse to the piston 6 whereby additional
power is obtained for starting and this without any sudden shock or jar. After
the piston has reached the end of its outstroke the tap or valve fmay be closed
by hand, or automatically if preferred, to shut off the reservoir d from the
cylinder a. The reservoir d is shown connected with the cylinder a at a point
covered by the piston 6 when the explosive charge in the compression space or
chamber is ignited; but it may be connected by a port controlled by a separate
valve if desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In combination with the cylinder of a gas or similar motor engine, a reservoir
or chamber sunnlied with an explosive fluid mixture at or about atmospheric

page_text: pressure and placed in communication with the cylinder by the movement of the
piston (or opening of a special valve) after the explosion in the compression
space or chamber of the cylinder has taken place whereby a second and supple-
mentary explosion is obtained substantially as. and for the purposes herein set
forth.
2. The general arrangement and combination of parts embodying my improve-
ments in gas and similar motor engines substantially as herein described with
reference to the accompanying drawing.
Dated this 21st day of December 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.