Year: 1886

page_text: Date of Application, 23rd July, 1886.
Complete Left, 21st Apr., 1887.
Complete Accepted, 24th May, 1887.
RESERV
1, JOHN FIELDING of the Atlas Works in the City and County of Gloucester,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus for igniting the combustible charge in the
cylinder of a gas-motor or oil-motor engine.
At the side of the cylinder I provide a chamber communicating with the cylinder
by a port which is covered by the piston at the extreme of its stroke, and is not
uncovered until the piston has just begun its stroke. This chamber, which I may term
the kindling chamber, at its front end, next the interior of the cylinder, communicates by
a small adjustable passage with the extreme end of the cylinder where the combustible
charge is generally richest. At its rear end or that farthest from the interior of the
cylinder, the kindling chamber has a port governed by a slide valve or a stop valve,
and outside this port a flame is kept burning. This port, when a slide valve is used,
or another port provided with a check valve when a stop valve is used, may com-
municate also with the open air. The action of the apparatus is as follows: The piston
being at the end of its stroke, having compressed the combustible charge in the
cylinder is covering the port of the kindling chamber, but a portion of the charge has
found its way by the small passage into the kindling chamber. At this moment the
slide or stop valve, worked by the engine, makes temporary communication with the
external flame and this ignites the contents of the kindling chamber, whereupon
the external port is immediately closed. The piston, now beginning to move, uncovers the
internal port of the kindling chamber, and the flame burning therein ignites the charge
in the cylinder. While the piston is drawing in a fresh charge, the external port of
the kindling chamber may, by means of the slide or check valve, be opened for a time
admitting air to clear the kindling chamber of the residues of previous combustion.
Dated this 23rd day of Jul. 1886

page_text: I, JOHN FIELDING of the Atlas Works in the City and County of Gloucester,
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 apparatus for igniting the combustible charge in the cylinder
of a gas motor or oil motor engine. I construct this apparatus as I will describe
referring to the accompanying drawings. Fig. 1 is a section of part of the end of a
gas motor or oil motor cylinder having the ignition apparatus of which Fig. 2 is a
transverse section.
At the side of the cylinder A I provide a chamber C communicating with the
cylinder by a port B which is covered by the piston P at the extreme of its stroke
and is not uncovered until the piston has just begun its stroke. This chamber C which
I may term the kindling chamber, at its front end next the interior of the cylinder
communicates by a small adjustable passage D with the extreme end E of the cylinder
where the combustible charge is generally richest. The kindling chamber Chas a
port governed by a spring stop valve outside of which a flame F is kept burning, the
products of combustion passing away by a chimney G. The action of the apparatus
is as follows. The piston P being at the end of its stroke, having compressed the
combustible charge in the cylinder, is covering the port B of the kindling chamber (
but a portion of the charge passes by the small passage D into the kindling chamber C.
At this moment the stop valve being opened by a lever L worked by the engine
pressing down its stem K makes communication with the external flame F and this
ignites the contents of the kindling chamber C, whereupon the external flame port is
immediately closed. The piston P now beginning to move, uncovers the port B of
the kindling chamber U, and the flame burning therein ignites the charge in the
cylinder. It is of advantage to make the cover of the chamber C as a safety valve V
capable of opening a little to relieve the pressure of explosion, holding it by a clip
and bolt so that it can he readily removed to give access to the chamber. In some
cases I provide an opening to the chamber with a valve opening inwards so that
when the piston is drawing in a charge, air shall be drawn through the kindling
chamber to clear out the products of previous combustion.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
In ignition apparatus for gas motor or oil motor engines, the combination of the
kindling chamber with its small adjustable passage D, its port B covered by the
piston at the end of its stroke and its flame valve, substantially as herein described.
Dated this 21st day of April 1887.
ABEL & IMRAY,
Agents for the Applicant.