Improvements in Incandescent Gas Burners.
Year: 1890

page_text: Date of Application, 27th Jan., 1890-Accepted, 29th Mar., 1890
COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Burners.
THEODOR BERGMANN Iron Works Eisenwerke Gaggenau Gaggenau Gormany,
Director, 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 present invention relates to incandescent gas burners in which two different
kinds of gas are employed simultaneously and consists in the construction of an
improved inlet cock or valve for the two gasses and of an improved holder for the
incandescent body.
In the annexed drawing in which similar letters of reference indicate like parts,
Fig. 1 shows in vertical section a burner of the kind to be described. Figure 2 is a
cross section of the inlet cock showing the burner in elevation. Figure 3 shows in
elevation the combination of three incandescent burners. Figure 4 is a plan of these
three burners. In figures 1 and 2 A is the box of the inlet cock into which is fitted
the plug B. Box A has two separate entrances opening into two ways or channels ()
and D which lead through plug B. to the two gas pipes c and d.
Channel C communicating with pipe c serves for admiting and conducting the
illuminating gas while channel D and pipe d serves for admitting and conducting
oxygen.
Plug B. is at either end provided with a set screw which is inserted parallel to its
axis. These screws E and F. reaching into the channels C. and D. respectively serve
for regulating the width of said passages or channels C & D. through the plug. In
this manner the quantity and proportion of gas and oxygen admitted to the burner
may be exactly regulated by screwing or unscrewing screws E. and F.
Pipes c and d conduct the respective gases to the burner. The oxygen is introduced
into the gas flame at the mouth of the burner whereby a temperature of such high
degree is produced that it causes a perfectly white incandescence of the body sup-
ported above the flame for this purpose thereby producing a pure white light.
The incandescent body which may be of any suitable material known, for this
purpose is held in an adjustable clamp or holder J in the following manner :-
Clamp J consists of two parts or jaws i which are adjustable to each other by
means of a set screw K, so that they can be made to receive and hold an incandescent
body of any size and form. In order to prevent the breaking or bursting of the
incandescent body through expansion by heat a spring k is placed between screw K
and clamp J in such manner as to permit one of the two jaws i or i¹ to give way
sufficiently to permit the incandescent body to expand. The incandescent body may
be vertically adjusted at will and this adjustment is by preference done by means of a
rack and wheel. Rack L. runs in a guide or sleeve M and is raised or lowered by
turning cog wheel / upon its axis N. Clamp J which carries the incandescent body
being supported by rack L it follows that the former may be adjusted in any desired
position to the flame of the burner.
In figures 3 and 4 three such burners are shown combined. A is the box through
which the gas is conducted to the pipes a', a² and a². B¹ is the inlet for the oxygen
into box D. from which pipes d' d d lead to the burners G. G¹ and G². The incan-
descent bodies H H¹ and H² are supported by a three branched clamp of the kind
before described. This clamp also consists of two halves or jaws which are
adjustable by means of screw K. and which permit the expansion of the incandescent
body through a spring k¹ a³, a², a² pipes for conveying ordinary gas.
The special advantage of the construction just described is that a lamp of this kind
produces no shadow and that all burners in consequence of the steady and regulated

page_text: supply of illumating gas and oxygen will produce a steady light which has not
been heretofore obtained by similar incandescent burners.
The burners described may of course be used singly or combined in any practical
number.
There may also be instead of the rack and wheel described and shown, be
employed a screw for adjusting the incandescent body or bodies to the flame.
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. In burners using two kinds of gas an inlet valve or cock with separate passages
for the two gases corresponding to which passages plug B is provided with two
channels the size of which is adjustable from the outside by means of screws E.
and F substantially for the purpose and as described and shown.
2. In incandescent gas burners, a holder for the incandescent
sisting of a socket or clamp formed of two halves or jaws i and
to each other by means of a screw K. provided with a spring k³,
adjustable preferably by means of a rack L. and suitable wheel
purpose and as herein described and shown.
Dated this 25th day of January 1890.
body or bodies con-
which are adjustable
said holder vertically
substantially for the
E. EATON,
Agent for Applicant.