IMPROVEMENTS IN GAS ENGINES
Year: 1885

page_text: I ALFRED ASHBY of 184 Kings Road Chelsea S.W. Electrician do hereby
declare the nature of my invention for "IMPROVEMENTS IN GAS ENGINES" to be
as follows:
My Invention relates to novel means whereby the ignition of the explosive
mixture in Gas Engines is effected in a much more simple, efficient and economical
manner than has hitherto been effected. Said Invention refers to that type of Gas
Engine or Motor in which heat is applied externally to effect the ignition aforesaid
as distinguished from the employment of direct flame.
To the
I have found as the result of actual experiment, that in the above type of motor
the explosion can be effected without the use of the otherwise necessary inter-
vening parts hereto-fore used, such as the slide valve and other accessory parts. In
carrying out my Invention I adapt to the cylinder cover at the exploding end, an
enlargement or hollow boss projecting from the outer face of said cover.
outer end of this hollow projecting boss I attach a separate tube of reduced
diameter to that of the hollow boss or prolongation to which it is attached. Said
tube may be bent upwards for the convenience of heating same and it is kept to
the temperature necessary to ensure the ignition of the explosive gases within the
cylinder. Said ignition being now caused by the expansion of the heated products
of combustion arising from the previous ignition and left in the tube and pro-
jecting hollow boss; The heated gases are thus, I find in the arrangement according
to my Invention prevented expanding into the cylinder by the increasing pressure
arising from the piston in its downward stroke during the time of compression;
and, it is not until the piston commences to recede that the gases contained in the
heated tube and hollow boss are then liberated and the resultant ignition takes
place as aforesaid.

page_text: I, ALFRED ASHBY of 184 Kings Road Chelsea, S.W. Electrician do hereby
declare the nature of my invention for IMPROVEMENTS IN GAS ENGINES 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 a novel means whereby the ignition of the explosive
mixture in Gas Engines is effected in a much more simple, efficient and economical
manner than has heretofore been effected.-Said Invention refers to that type of
Gas Engine or Motor in which heat is applied externally to effect the ignition
aforesaid as distinguished from the employment of direct flame.
I have found, as the result of actual experiment, that in the above type of
motor the explosion can be effected without the use of the otherwise necessary
intervening parts heretofore used such as the slide valve and other accessory
parts.
In carrying out my Invention I adapt to the cylinder cover, at the exploding
end, an enlargement or hollow boss projecting from the outer face of said cover.
To the outer end of this hollow projecting boss, I attach a separate tube of reduced
diameter to that of the hollow boss or prolongation to which it is attached. Said
tube may be bent upwards for the convenience of heating same, and it is kept to
the temperature necessary to ensure the ignition of the explosive gases within the
cylinder. Said ignition being now caused by the expansion of the heated products
of combustion arising from the previous ignition, and left in the tube and pro-
jecting hollow boss.
The heated gases are thus I find, in the arrangement, according to my Invention,
prevented from expanding into the cylinder by the increasing pressure arising
from the piston in its downward stroke during the time of compression; and it is
not till the piston commences to recede that the gases contained in the heated tube
and hollow boss are then liberated and the resultant ignition takes place as
aforesaid..
In the accompanying drawing A is the cylinder cover. B, is the enlargement or
hollow boss above referred to. C the separate tube of reduced diamèter attached
to the outer end of B.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is :-
:-
The novel means whereby I effect the explosion of the gases in gas engines
without the employment of the usual intervening valvular and other controlling
devices which have hitherto been found to be indispensable substantially as herein
described and shewn in the accompanying drawing.
י
JAMES STEVENSON,
Agent for Applicant.