Improvements in or appertaining to Gas Engines.
Year: 1891

page_text: Date of Application, 9th Nov., 1891
Complete Specification Left, 9th Aug., 1892--Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Gas Engines.
I, ADOLPHUS BARRON of Stamford Street Leicester in the County of Leicester
Engineer, do hereby declare the nature of this invention to be as follows:-.
This invention relates to improvements in or appertaining to gas engines
either horizontal or vertical, single or double cylinder that are constructed with
a slide valve for igniting the gas flame. The main object of my invention is to
convert the old fashioned slide engine into a tube ignition engine for the purpose
of saving power with a smaller consumption of gas, and to obviate the explosion
taking place prematurely, besides reducing friction and saving the cost of having
to re-face the slide. And causing the ignition or firing to take place at the right
time, not before the crank comes to the centre in its revolution.
To carry out my invention, in lieu of the slide and its case or holder I
arrange in a suitable box or ignition chamber a spring pressed rod, the inner
end of which carries a mushroom valve or its equivalent which shuts off com-
munication with the gas valve and air vessel. This spring pressed valve is
closed before firing takes place by a cam on the side shaft, or shaft parallel to
the cylinder, and opened again after firing by the cam contracting the spring
on the rod and so admitting air and gas into the cylinder, sufficient quantity
having been admitted the valve is again closed, the gas or ignition valve hereafter
described is then opened by aid of another cam on the side shaft, this shaft
receiving its motion as usual from the crank shaft of the engine, the explosion
or ignition then takes place by the following arrangement.
A sliding piston rod or tube in which is cut or drilled a right angled slot or
hole is fitted parallel to the other valve before mentioned either horizontally or
vertical, or a mushroom valve or valves may be put upon the rod instead,
whichever is employed a sliding motion is imparted thereto by pressure of a
suitably shaped cam on the side shaft when the valve will open under the
ignition chamber of the hot pipe thus causing the explosion or ignition to take
place upon the crank coming to the centre so ensuring the firing taking place
at the proper time. To the opposite end of this sliding rod, bar or tube is
secured a spring to keep the other end in contact with the periphery of the cam,
or other equivalent means may be employed for the purpose. Each of the valves
above mentioned are moved alternately at every other stroke of the piston rod
and crank by the cams on the side shaft so that until the firing of the hot pipe
has taken place the one communicating with the air and gas chamber leading to
the cylinder is closed, and "vice versa."
Dated this 5th day of November 1891.
WILLIAM BESTWICK MAXFIELD,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in or appertaining to Gas Engines.
I, ADOLPHUS BARRON, of Stamford Street Leicester, in the County of Leicester
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 :—
This invention relates to improvements in or appertaining to gas engines either

page_text: horizontal or vertical, single or double cylinder that are constructed with a slide
valve for igniting the gas flame.
The main object of my invention is by the means as hereinafter described to
convert the old fashioned slidge engine into a tube ignition engine for the purpose
of saving power with a smaller consumption of gas, and obviating a bad effect of
the explosion taking place prematurely, besides reducing friction and saving the
cost of occasionally, having to reface the slide.
That my invention may be well understood I have annexed a sheet of drawings
in which
Figure 1. is a front elevation of my valve contrivance and
Figure 2 a side view of same.
Similar letters of reference represent like parts in all the figures.
To carry out my invention, in lieu of the slide valve commonly used in gas engines,
and its case or holder I arrange in a block casting A the chambers B. B¹ which is
covered by the screw nuts C; passing through holes in the walls b, b¹, is the spring
pressed rod D, upon the inner end of which is the mushroom valve d, or its equivalent
which shuts off communication with the gas valve and air vessel. And is closed"
seen in Fig. 1." before firing takes place by the cam E on the side shaft F which
receives its revolution from gears on the crank shaft of the engine (not shown).
as
The valve d is opened at every revolution of the shaft F after firing, by the cam E
pressing against the head G of the rod D, and contracting the spiral spring H, and
so admitting air and gas into the cylinder of the engine to which the contrivance is
attached, through the port hole d¹, sufficient quantity having been admitted the
valve again closes and the small valve I, upon the inner end of the spring pressed
rod passing through holes in the outer portion of the block casting A carrying
another spiral spring H¹ is also operated from a cam E' on the side shaft which as
before stated receives its motion from the crank shaft of the engine. The explosion
or ignition then takes place by the following arrangement.
The gas
is admitted through the pipe J, into the perforated tube K which carries
as usual an ordinary gas valve, held therein by the screw k¹, the air entering the
chamber L Figure 2 through a port in the cylinder of the engine opposite to the
port d² when it mixes with the gas from the perforations in the tube K and is
discharged by the valve d into the cylinder or cylinders, after the compression has
taken place the valve I is opened, when communication is allowed to the red hot
tube M. The blue light to heat the tube in the chimney N is obtained through the
pipe secured in the socket O' secured by thumb screw upon the spindle O². The
tube M being carried in the screw nut m', and through to the valve hole
dotted line." The valve or valves opening under the ignition chamber of the hot
pipe causes the explosion or ignition to take place upon the crank of the engine
coming to the centre, so ensuring the firing taking place at the proper time. The
valves moving alternately at every other stroke of the piston rod and crank by the
cams on the side shaft and until such time as the firing of the hot pipe has taken
place, the one communicating with the air and gas chamber L, and leading by the
port d' and ' to the cylinder is closed and "vice versa."
"
66
seen in
The contrivance is fixed on the end of an existing cylinder or jacket, or for double
cylinders it is duplicated. Screws are put through the holes P, so that the port
holes d' d² come opposite those in the cylinder, or cylinders.
.In small engines the small valve I for controlling the ignition may be dispensed
with. I utilize the frame or guides which carry the slide valve in engines which I
convert by fitting the block a therein and making it secure as above stated by
screws.
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 :
Converting a slide gas engine into a tube ignition engine by means of a valve or
valves arranged as herein described in a block casting having a flanged block to fit

page_text: at the end of existing cylinder, jacket, cylinders or jackets of gas engines and
dispensing with the slide valve commonly used therein. Operating and operated in
the manner and for the purpose substantially as set forth.
Dated this 8th day of August 1892.
WILLIAM BESTWICK MAXFIELD,
The "Central" Office for Patents,
19, Bowling Green Street, Leicester, Applicant's Agent.
WILLIAM BESTWICK MAXFIELD,
The "Central" Office for Patents,
19, Bowling Green Street, Leicester, Applicant's Agent.