An Improvement in Electric Igniters for Gas or Oil Motors.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
An Improvement in Electric Igniters for Gas or Oil Motors.
I, PAUL AUGUSTE DECAM, of Asnieres, Seine, France, Artist, do hereby declare
the nature of this, invention to be as follows:
My invention relates to an electric igniter for the combustible charge of a
gas or oil motor engine, constructed as follows.
A core of porcelain or other ceramic material is enclosed in a metal case,
which is fitted on to the core against shoulders thereon, and provided with a
set screw or cross pin to prevent the core from shifting in the case.
After placing the case on the core with suitable ceramic cement interposed,
the whole is baked.
The end of the metal case is screw threaded to be screwed into the wall of the
combustion chamber.
Through the axis of the core which is perforated passes a metal rod con-
nected at its outer end by the electric conductor to one terminal of a switch,.
and at its other end to a metal conoid which is lodged in a recess in the end of
the core.
The curved surface of the conoid is in proximity to the point of a
wire projecting from the metal case which is connected to the other terminal
of the switch.
When an electric current is transmitted it causes a spark between the conoid
and the wire which ignites the charge in the combustion chamber.
Dated this 28th day of January 1899
ABEL & IMRAY,
Agents for the Applicant.
An Improvement in Electric Igniters for Gas or Oil Motors.
I, PAUL AUGUSTE DECAM, of Asnieres, Seine, France, Artist, 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 an electric igniter for the combustible charge of a
gas or oil motor engine constructed as I shall describe referring to the accom-
panying drawings.
Fig. 1 is a vertical section and Fig. 2 is a sectional plan. Fig. 3 is an eleva-
tion and Fig. is a sectional plan shewing a modification.
A core a of porcelain or other ceramic material is made with an enlarged rear
part b and has its front part enclosed in a metal case c which is fitted on to the
Price 8d1

page_text: core against shoulders thereon, and provided with set screws or a cross pin d
engaging in a groove or recess e to prevent the core from shifting in the case.
After placing the case on the core with suitable ceramic cement. f interposed,
the whole is baked.
The end of the metal case is screw threaded at A to be screwed into the wall
of the combustion chamber of an engine.
Through the axis of the core which is perforated passes a metal rod g having
at its outer end a boss connected by the electric conductor to one terminal of
a switch, and having screwed to its other end a metal conoid i which is lodged
in a recess in the end of the core. The curved surface of the conoid i is in
proximity to the point of a wire projecting from the metal case which is con-
nected to the other terminal of the switch.
When an electric current is transmitted it causes a spark between the conoid
and the wire which ignites the charge in the combustion chamber.
When there is room in the wall of the combustion chamber for a larger
screw k, the core a need not be reduced to the smaller diameter in the front
part so as to present the shoulder at m, but may be continued the same dia-
meter from the shoulder of b. The metal terminal i may be somewhat. varied
in shape, but it is preferred to make its end of a round or approximately spherical
shape, as a surface of this form acts as a kind of electrical condenser causing.
the electricity to form a layer on it ensuring ignition of the charge.
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-
1. An electric igniter for gas or oil motors consisting of a ceramic perforated
core held in a metallic casing, a metallic rod connected to one terminal of a
switch and passed through the core and screwed to a metal conoid at its end
near which is a bent wire projecting from the case which is connected to the
other terminal and is screwed into the wall of the combustion chamber sub-
stantially as described.
2. In an electric igniter for gas or oil motors, the combination of a wire
connected to the one pole of a source of electricity with a metallic piece near
it which is connected to the other pole and which is of a rounded shape, sub-
stantially as and for the purpose set forth.
Dated this 7th day of October 1899
ABEL & IMRAY,
Agents for the Applicant.