Year: 1887

page_text: 1, ERNST FAHRIG, of 24, Listra Park, Stamford Hill, in the county of Middlesex,
Gas and Electrical 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 an improved self-acting gas burner, that is to say, a burner
of that class which has arranged in combination with it a burner for a pilot flame, so
that when the cock with which the burner is provided is opened to allow the gas to
pass to the main burner, the gas will be immediately ignited and when again closed
to stop the supply of gas to the main burner the pilot flame will be ignited and
vice versa.
Heretofore the plugs of the cocks of such burners, in order to allow the passage of
gas to the pilot burner, have had auxiliary holes bored therein in addition to the
main hole or passage, or have been provided with grooves of peculiar shapes which
are more or less difficult to construct, operating in conjunction with auxiliary holes in
the shell of the cock.
The chief object of my invention is to provide a self-lighting gas-burner which is
simpler and more cheaply manufactured than those heretofore used.
provide a groove in the surface either of the plug, or of the shell of the cock,
which forms a channel of connection between the end of the ordinary main way through
the shell and the end of the ordinary mainway through the plug when the cock is
turned so as to close the passage to the main burner.
The other end of the ordinary mainway through the plug is at the same time permitted
to communicated with the pilot burner.
In the accompanying drawing
Figure 1 is a sectional side elevation of a burner constructed according to my
invention.
Figure 2 is a section of the same on the line of figure 1, and
Figure 3 is a similar section but shewing the plug of the cock in a position at right
angles to that shewn in figure 2.
Figure 4 is a sectional view illustrating a modification of my said invention.
Figure 5 shows the application of my improvements to a Bunsen burner.
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page_text: a is the shell of the cock of the burner, b is the plug thereof, c is the main burner,
d is the burner for the pilot flame, e is a guard for protecting the latter from draughts,
and is a globe gallery.
The inlet side of the cock is provided with a single channel g, and the plug also has
a single passage h; i is the channel for conducting the gas to the main burner and j
that for conducting it to the pilot burner.
k and are two small grooves which are formed in the plug 6 in the same plane as
the passage h. These grooves are of such length that when the plug is in the
position shewn in figure 2 the groove k will establish communication between the
channel g and the passage of the plug, and the groove / between the passage h and
the channel so that gas can pass from the inlet channel g to the burner d.
In order that the quantity of gas passing to the burner d shall be very small,
either the groove k or the groove 1 gradually becomes shallower and narrower as it
recedes from the passage h, as shewn in figures 1 and 2, the smallest portion being
immediately below the channel j when the plug is in the position shewn in figure 2.
This formation of the groove also has the advantages that when turning the plug
to the position shewn in figure 3 in the direction of the arrow, it allows an increased
quantity of gas to pass to the burner d, so that the length of the flame of the latter will
be increased sufficiently to light the gas at the burner c when the gas issues there-
from; and that it renders the employment of a regulating screw unnecessary. It will
be noticed that when the plug is in the position shown in figure 3 the channel ; is closed
by a solid portion of the plug.
m is a stop which prevents the plug from being turned too far in either direction.
In the modification of my invention shown in figure 4 the groove is dispensed
with, the passage h of the plug, in this case, being made somewhat larger at one end
than heretofore, in order to allow it to communicate with the passage j.
Instead of forming the passage k in the manner herein before described a recess may
be cut in the shell of the cock as indicated by dotted lines in figure 3.
In figure 5 I shew the application of my improvements to a "Bunsen" atmospheric
burner, being the tube in which the mixture of air and gas is formed and o the tube
for the pilot flame; p is a collar adapted to be rotated to more or less close the holes g
for controlling the supply of air to the burner.
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. A self-lighting gas burner having a cock provided with a single hole through the
plug, one end of which hole, when the passage to the main burner is closed, com-
imunicates with the gas supply by means of a groove either in the outer surface of the
plug or the inner surface of the shell, and the other end of which hole communicates
with the pilot burner, arranged substantially as herinbefore described.
2. The improved self-lighting gas burner herein before described and shewn in
figures 1, 2, and 3.
3. The modification in which the groove is formed in the shell of the cock as
herein before described and indicated in dotted lines in figure 3.
4. The modification in which one end of the hole through the plug communicates
directly with the pilot burner, as hereinbefore described and shewn in figure 4.
Dated the 19th day of November 1887.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.