Improvements in Bunsen Burners.
Year: 1896

page_text: Date of Application, 7th Mar., 1896-Accepted, 2nd May, 1896
COMPLETE SPECIFICATION.
Improvements in Bunsen Burners.
I WILLIAM HUMPHREY WHEATLEY, of the Firm of Wheatley & Mackenzie,
Engineers and Patent Agents, of 40 Chancery Lane, London, W.C. do hereby
declare the nature of this invention-a communication to me from Charles Schmid, of
47 Boulevard Anspach, Brussels, in the Kingdom of Belgium, and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This invention has for its object to construct a Bunsen burner which shall be
specially applicable for heating to incandescence mantles of refractory materials
used for illuminating purposes.
Referring to the accompanying drawings: Fig. 1 is a vertical section of a
Bunsen burner constructed according to this invention, and Fig. 2 is an elevation
of the same.
A cock a is surmounted by a tubular screw threaded bush or plug 6 screwed into
a tube c and terminated by a finely perforated cap plate d through which the gas
issues. The lower and enlarged part of a tube e fits loosely on the inner tube c and
holes are arranged coincidently with each other, in them, for the admission of
air to the chamber g so that in one position of the said tubes they are open widely
while, by rotating the tubes relatively to each other, the passages are contracted or
enlarged to meet requirements, the said tubes being secured in any desired relative
position by means of a set screw in the tube c working in the slot i in the outer
tube e as will be readily understood.
The upper part of the tube e is contracted in diameter and fits loosely in a tube
having
a flange m secured to wings n which carry the gallery o and rest on a
dished washer p supported by the tube e. The upper part of the tube is screw
threaded to receive the correspondingly screw threaded socket 9 of the burner
cup r which latter is also screw threaded internally to receive the end of a short
tube or cylinders of steatite or other suitable refractory material forming the orifice
of the burner.
In the bottom of the cup r is a perforated disc or diaphragm for the purpose of
facilitating the thorough mixing of the gases on their way to the burner orifice, while
the tube or cylinders is surmounted by a cupped head or cap v of fine wire gauze
secured by a ferrule w as is clearly shown.
The object in forming the socket g and tube separately, and connecting them
together by screw threads, is to admit of the variation of the height of the burner
orifice in order to adapt it to the varying heights of the mantle.
Obviously a set screw and slot or other known means of adjustment may be
substituted for the screw threads on the socket g and tube l.
The cock a being connected to a source of gas supply, the gas passes through it
and the perforated cap d into the chamber g where it mixes with air entering
through the air inlet holes f, the combustible mixture thus formed passing
through the perforated disc t, in order to further intimately mix the gases,
and thence to the fine wire gauze cap on the upper surface of which it is ignited,
the fine gauze preventing the firing back of the gas as is well known.
In order to obviate the inconvenience of relighting the burner, provision is made
for keeping a small flame burning at all times when the main supply is shut off.
For this purpose the regulating cock a is provided with a bye-pass, that is to say,
a means for supplying a small quantity of gas at all times. The plug where

page_text: it crosses the passage y is formed with flats which, when placed in the direction
of the passage y, permit a free passage of the gas but shut off the supply when
turned crosswise. In order however to ensure the passage of a small supply of gas
when in this position a small hole z is drilled through it which permits of the
passage of the small quantity required to keep the flame just alight."
The mantle is suspended from the chimney or other suitable support.
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 a Bunsen burner, varying the height of the burner orifice by varying the
position of the burner cup on its supporting tube substantially in the manner
described and for the purpose set forth.
2. A Bunsen burner arranged, constructed and operating substantially as described
and illustrated by the drawings.
Dated this 5th day of March 1896.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.