Improvements in Automatic Gas Lighting.
Year: 1897

page_text: Date of Application, 15th Oct., 1897
Complete Specification Left, 12th Feb., 1898-Accepted, 7th May,
1898
PROVISIONAL SPECIFICATION.
Improvements in Automatic Gas Lighting.
We, FRIEDRICH HOFFMANN, Agent, and WILHELM OHLSEN, Engineer, both of
7, Wilhelmsplatz, Kiel, in the Empire of Germany, do hereby declare the nature
of this invention to be as follows: -
This invention relates to that class of device where auxiliary jets light larger jets,"
and its object is to provide a simple automatic device whereby the auxiliary jet
is in the first instance lighted on the opening of the gas cock.
This invention consists in providing channels upon the ordinary gas plug leading
to the auxiliary jet and also providing an electrical spark connection situated in
or upon the end of the plug, and both devices are arranged in such a manner
that one operation of turning on the main gas cock admits gas to the auxiliary jet
and simultaneously ignites it.
In carrying this invention into effect as applied to the ordinary rotary gas plug
tap, there is provided a partial groove upon the plug body and a port leading
into a passage situated in the smaller end of the plug, and these are so placed
relatively to one another that when the main gas supply is turned off the port is
not in communication with the channel, but when the main gas supply is turned
on the port is in communication with the channel. The passage in the tap at
the smaller end leads to a short auxiliary pipe placed upon the portion of the plug
projecting beyond the casing or body, and it is evident that when the plug is turned
on a small supply of gas will flow by the channel port and passage into the
auxiliary pipe.
One terminal of a battery circuit is fastened to the metal work of the body or
casing, while the other terminal of the battery is fastened to an insulated extension
placed upon the tap body in such a position that the top of the auxiliary pipe when
open comes immediately underneath the insulated extension forming a spark
gap. The auxiliary pipe is placed immediately underneath the main jet which it
is desired to light.
The operation of the hereinbefore described devices is as follows:-When the
gas cock is turned off the electrical circuit is broken and no gas passes either into
the main jet or into the auxiliary jet, but when the gas cock is turned on a small
bye-pass flow takes place through the groove, the port, and the passage, into the
auxiliary pipe, simultaneously with the flow of the gas into the main jet or burner;
while at the same time the end of the auxiliary pipe comes underneath the exten-
sion, forming a spark gap and allowing high tension sparks to pass across or near
the mouth of the auxiliary tube. The ignition of the jet then takes place followed
at once by that of the main jet.
A further modification of both gas supply and electrical ignition may be arranged
by having the auxiliary pipe stationary and attached to a sleeve riding upon the
outer portion of the protruding plug end, while the insulated extension with one
electrode may be placed at a suitable distance to form the spark gap, the necessary

page_text: circuit being made through the auxiliary pipe and electrode. at the desired moment
by a short contact-piece swivelling and attached to the outer end of the plug.
Dated this 15th der of October 1807
MARKS & CLERK,
18, Southampton Buildings, Chancery Lane, London, W.C., and
13, Temple Street, Birmingham, Agents.
We, FRIEDRICH HOFFMANN, Agent, and WILHELM OHLSEN, Engineer, both of
7, Wilhelmsplatz, Kiel, in the Empire of Germany, 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 that class of device where auxiliary jets light larger jets,
and its object is to provide a simple automatic device whereby the auxiliary jet
is in the nrst instance lighted on the opening of the gas cock.
The invention consists in providing channels upon the ordinary gas plug leading
to the auxiliary jet and also providing an electrical spark connection situated in
or upon the end of the plug, and both devices are arranged in such a manner
that one operation of turning on the main gas cock admits gas to the auxiliary jet
and simultaneously ignites it.
The methods of carrying the invention into effect are illustrated in the accom-
panying sheet of drawings, and as follows,-
Figures 1, 2, and are respectively side elevation, longitudinal section and front
elevation of the first modification.
Figures 4 and 5 are respectively elevation and plan on an enlarged scale of the
gas cock plug employed in the first modification.
Figures 6, 7 and 8 are respectively side elevation, longitudinal section, and front
elevation of the second modification.
Figures 9 and 10 are respectively elevation and plan on an enlarged scale of
the gas cock plug employed in the second modification.
In carrying the invention into effect as illustrated in Figures 1 to 5 of the
drawings, and as applied to the ordinary rotary gas plug tap, there is provided
a partial groove a¹ upon the plug body and a port a leading into a passage c¹
situated in the smaller end of the plug, and these are so placed relatively to one
another that when the main gas supply is turned off the port a² is not in com-
munication with the channel or groove a¹, but when the main gas supply is turned
on the port a² in communication with the channel or groove a¹. The main gas
supply is of the usual type, viz., through a passage a in the tap body B and a
perforation in the plug c and the tap is shown full open at Figure 2 of the drawings.
The passage c in the tap at its smaller end leads to a short auxiliary pipe b attached
by a ring integral with it to that portion of the plug projecting beyond the casing
or body B, and it is evident that when the plug c is turned on a small supply of
gas will flow by the channel a', port a² and passage c¹ into the auxiliary pipe b.
One terminal of a battery circuit is fastened to the metal work of the body or
casing B while the other terminal of the battery is fastened to an insulated
extension & placed upon the tap body B in such a position that a point piece b
attached to the top of the auxiliary pipe 6 when the tap is opened comes immediately
underneath the termination d¹ of the insulated extension forming a spark gap.
The auxiliary pipe is placed immediately underneath the main jet pipe A which
it is desired to light.

page_text: The operation of the hereinbefore described devices is as follows,-When the
gas cock c is turned off the electrical circuit is broken and no gas passes either
into the main jet pipe A or into the auxiliary jet pipe b but when the gas cock
is turned on a small bye-pass flow takes place through the groove al, the port a²,
and the passage cl into the auxiliary pipe b simultaneously with the flow of the
gas into the main jet or burner A; while at the same time the end piece b₁ of the
auxiliary pipe 6 comes underneath the termination d' of the extension d forming
a spark gap and allowing high tension sparks to pass across or near the mouth
of the auxiliary tube. The ignition of the jet then takes place followed at once
by that of the main jet.
The second modification is illustrated at Figures 6 to 10 of the drawings and
in this arrangement both gas supply and electrical ignition are arranged by having
the auxiliary pipe b stationary by passing it through an eye e formed in the body B
and attaching it to a sleeve b2 riding upon the outer portion of the protruding plug
end, while the insulated extension with one electrode is placed also upon the
plug end and as shown at a suitable distance to form a spark gap by passing through.
a slot in the pipe b not shown and sparking between the said extension d and the
interior of the pipe 6 the necessary circuit being made through the said auxiliary
pipe band electrode at the desired moment by a short contact-piece d³ swivelling
and attached to the outer end of the plug. The gas supply to the main burner A
is similar to that hereinbefore described with reference to Figures 1 to 5 and the
only variation in the auxiliary ports and passages is that the port leading through.
the end of the plug from the passage swivels while the pipe b remains stationary.
Similar letters in this modification denote similar parts to that last described.
It is to be clearly understood that the sparking arrangement may be varied by
breaking contact and allowing a spark to pass across the auxiliary tube 6 and
further that the time of opening the main burner and auxiliary passages may be
arranged one with a slight lead over the other so as to facilitate lighting and all
without departing from the subject of the present invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. In automatic gas lighters providing an auxiliary pipe adjacent to the main
burner with spark gaps or contact breaker and so constructing ports or passages
leading to this auxiliary pipe through the main burner plug and also sliding
electrical connections upon the said plug; that at one operation the gas is turned
on in the main burner and the auxiliary pipe and electric sparks are formed
igniting the auxiliary jet which in turn lights the main jet all substantially as
hereinbefore described.
2, The improved automatic gas lighter substantially as hereinbefore described
with reference to Figures 1, 2, 3, 4, and 5 of the accompanying drawings.
3, The improved automatic gas lighter substantially as herein before described
with reference to Figures 6, 7, 8, 9 and 10 of the accompanying drawings.
Dated this 12th February 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.