Improvements in Gas and similar Motor Engines.
Year: 1893

page_text: Date of Application, 2nd Mar., 1893
Complete Specification Left, 2nd Dec., 1893-Accepted, 6th Jan., 1894.
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:-
My invention relates to gas and similar motor engines and it consists in improve-
ments in the igniting apparatus, the objects of my invention being to enable a very
short igniting tube to be employed and also to obtain a more certain and perfect
ignition of the explosive charge than now usual.
At the present time it is customary to employ a reservoir near the ignition valve
and the ignition tube so that when the valve is open to admit explosive mixture to
the ignition tube the reservoir will receive a portion of the products of the previous
explosion that remain in the passages leading to the ignition tube and so assist in
getting an explosive mixture, in the ignition tube but with this arrangement the
ignition of the new charge is not perfect.
I dispense with the usual reservoir and pass the compressed mixture through a
short tube placed inside the ordinary ignition tube which is closed at the top and
which may be much shorter than usual. The mixture passes through the inner
tube into the heated portion of the ignition tube and down the annular space
between the inner and the outer tube and from a point near the bottom of the outer
or ignition tube; the mixture passes into a small reservoir or the reservoir may be
dispensed with in which case the mixture would be allowed to escape through a
small hole or holes controlled by a valve or open to the atmosphere.
By my arrangement the explosive mixture is brought readily into contact with
the heated portion of the ignition tube and thereby a more perfect and positive
ignition of the charge is ensured.
Dated thin lot don of Mah 1002
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 :-
My invention relates to gas and similar motor engines and it consists in improve-
ments in the igniting apparatus, the objects of my invention being to enable a very
short igniting tube to be employed and also to obtain a more certain and perfect
ignition of the explosive charge than now usual.
At the present time it is customary to employ a reservoir near the ignition valve
and the ignition tube so that when the valve is open to admit explosive mixture to
the ignition tube the reservoir will receive a portion of the products of the previous
explosion that remain in the passages leading to the ignition tube and so assist in
getting an explosive mixture in the ignition tube but with this arrangement the
ignition of the new charge is not perfect.
I dispense with the usual reservoir and pass the compressed mixture through a

page_text: short tube placed inside the ordinary ignition tube which is closed at the top and
which may be much shorter than usual. The mixture passes through the inner tube
into the heated portion of the ignition tube and down the annular space between the
inner and the outer tube, and from a point near the bottom of the outer or ignition
tube the mixture passes into a small reservoir or the reservoir may be dispensed
with in which case the mixture would be allowed to escape through a small hole or
holes controlled by a valve or open to the atmosphere.
Referring to the drawings forming part of this Specification―
Figure 1 is an end sectional elevation of the cylinder of a gas or similar motor
engine illustrating the application of my improved igniting apparatus.
Figure 2 is an enlarged sectional elevation illustrating the ignition tube and other
parts.
Figs. 3 and 4 are detail views of one of the valves.
In Figure 1, a designates the power cylinder of the engine, 6 the gas and air
admission valve, c the exhaust valve and d the ignition valve, all of which valves
are operated from the side shaft e in the usual or any convenient manner.
The ignition valve d is kept normally closed as shown by a spring f and is opened
by a lever g fulcrumed at gl and operated by a cam el on the side shaft e. The
burner chamber has fixed in it the ignition tube i which is much shorter than
usual and is closed at the top and heated by the flame from the atmospheric burner j
as usual; within or below the ignition tube i is fixed a short tube k which when the
ignition valve d is open forms a passage from the cylinder a to the ignition tube i.
There is an annular space or chamber round the short tube k and this chamber has
a small hole or openings in it to the atmosphere, which openings are controlled by a
back pressure valve m shown detached in Figs. 3 and 4; the casing of this valve
has a cam surface o and a weighted lever p is secured to the spindle m³ for closing
the valve if desired.
When the ignition valve d is open explosive fluid mixture is admitted through
the short tube k into the heated portion of the ignition tube i and down the annular
space into the chamber away through the outlet valve m which at starting is kept
normally open, driving before it and expelling through the valve m and an
opening n any products of a previous explosion. When the engine is running at its
regular speed the valve m is kept closed and the products of combustion from the
ignition tube are expelled into the chamber l.
By this arrangement the explosive fluid mixture is brought readily into contact
with the heated portion of the ignition tube i and thereby a more perfect and
positive ignition of the charge is insured.
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. The arrangement use and application of a second short inner ignition tube in
combination with the ordinary heated ignition tube substantially in the manner and
for the purposes herein set forth.
2. The combination with the ordinary ignition tube and a second short inner
ignition tube, of the chamber and a back pressure valve such as m substantially in
the manner and for the purposes herein set forth.
Dated this 1st day of December 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.