Induction Gas Burners for Laboratory, Mechanical, and General Work.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Induction Gas Burners for Laboratory, Mechanical, and General
Work.
I, FREDERICK LAMPLOUGH, of Glen Ridge, New Jersey, in the United States
of America, Civil Engineer, do hereby declare the nature of this invention to be
as follows:-
The invention has for its object the production of an induction gas
burner for taking the place of the ordinary Bunsen burner in laboratory and
general work and to take the place of the ordinary gas blow-pipe used in various
descriptions of mechanical work.
The idea forming the basis of this invention is the induction of a large current of
air by means of a fine jet of gas; this principle is already utilized in the Bunsen
burner, but in such case unless the gas is kept full on, it loses its velocity, or in
other words, in reducing the flame of a Bunsen burner by means of the gas supply
cock, the velocity of the gas is impeded by being wire drawn through the plug of
the cock, the consequence is, in burning under these conditions the gas rising
carries with it a fair amount of air whereby what is commonly known as an
ordinary mixture is obtained which unless the Bunsen burner tube or nozzle is of
sufficient length causes it to "light back."
Through this defect it has been impossible to obtain good results. unless the
burner tube were at least four inches long, while no great success has yet been
obtained in the production of a fierce jet of flame capable of regulation without
undue loss of power.
For this reason I have made experiments which have led to the production of
the burner hereinafter described.
I employ as heretofore a nozzle which may be varied in bore according to the
work it has to perform, the lower end of this nozzle enters an air chamber provided
with holes below the centre around the circumference thereof. The gas jet nipple
rises somewhat into said air chamber and is provided with a needle valve, thus by
the gas stop cock being left full on and the jet nipple orifice being regulated by
means of a needle valve, the current of gas induces air to enter the air chamber
and to travel at high velocity through the nozzle.
It will be understood from this that the velocity of the gas escaping at this
point is kept constant, merely the stream of same being varied, with the result that
the burner does not light back, and a good current of air is continually sent with
the gas through the nozzle, the size of frame varying according to the amount of
gas used.
The gas inlet is below the gas jet nipple and it is according to one arrangement
connected to the end of a piston tube working in the horizontal portion of a
tubular T piece of the gas stand forming the gas chamber and said piston tube is
provided with a stop to prevent it being drawn completely out of the stand and thereby
produce dangerous results. By this piston tube the burner can be drawn forward
and rotated to any desired angle even to a complete reversion of position for small
brazing purposes. Electro-typers and others would simply attach the burner to a

page_text: handle and use it for the same purpose that the foot bellows and mouth blow-pipe
are now used.
Dated June 6th 1896
HARRIS & MILLS.
23 Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Induction Gas Burners for Laboratory, Mechanical, and General
Work.
1, FREDERICK LAMPLOUGH, of Glen Ridge, New Jersey, in the United States
of America, Civil 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 :-
The invention has for its object the production of an induction gas burner for
taking the place of the ordinary Bunsen burner in laboratory and general work
and to take the place of the ordinary gas blow-pipe used in various descriptions of
mechanical work.
I will describe my invention in connection with the accompanying drawings
in which
Fig. 1 is a vertical section of the upper parts and Fig. 14 is a vertical elevation
of the lower parts of a gas stand provided with a single burner fitted with a needle
valve.
Fig. 2 is a vertical elevation and Fig. 3 is a plan of a gas stand provided with a
pair of burners each of which is fitted with a needle valve.
Fig. 4 is a longitudinal section of a gas heater also provided with a needle valve
and adapted to be used in the hand as a gas blow-pipe.
Fig. 5 is a longitudinal section of a similar heater to that shown at Fig. 4 but
without the needle valve and Fig. 6 is a separate view of the burner taken at right
angles to Fig. 5.
In all the figures like parts are indicated by similar letters of reference.
According to my invention I employ a nozzle a which may be varied in bore
according to the work it has to perform but which is much shorter than the Bunsen
burner tube hitherto employed whilst its inner end a enters a globular support b
provided with holes below the centre and around the circumference thereof for
the admission of air. This nozzle a is also slightly flared at its exit and is bell
mouthed at its inlet. The gas jet nipple c enters somewhat into said support b and
and in the arrangement shown at Figures 1 to 4 it is provided with a needle
valve d thus by the gas stop cock e being left full on and the jet nipple orifice
being regulated by turning the head d of the needle valve d the strong current of
gas passing into the nozzle a induces air to enter the lower bell mouthed end of the
nozzle a and to travel at high velocity through said nozzle a the mixing of air and
gas taking place substantially at the end of the first flare of the nozzle.
gas
It will be understood from this that the velocity of the gas escaping at the s
nipple is kept constant, merely the stream of same being varied, with the result
that the burner does not light back, and a good current of air is continually sent
with the gas through the nozzle a, the size of flame varying according to the
amount of gas used.
The mixed air and gas are first compressed in the bell mouthed inlet a' of the
nozzle a to obtain velocity, and then the flared exit of the nozzle a spreads the body
of the flame to give it belly for the purpose of obtaining a fine point. Without
this flare at the exit, the flame is simply irregular and broken.

page_text: The gas inlet from the stand is below the gas jet nipple c and according to the
arrangement shown at Fig. 1 the burner consisting of the parts a. b. c and also the
needle d are carried by a tube d¹ connected to the end of a tube f working in
the horizontal portion gl of a tubular T piece g. g' of the gas stand forming the
gas chamber and said tube f is provided with a stop f¹ to prevent it being drawn
completely out of the stand and thereby produce dangerous results. By this tube f
the burner can be drawn forward and rotated to any desired angle even to a
complete reversion of position for small brazing purposes.
In the modification shown at Figures 2 and 3 two burners are employed of
precisely similar form to that above described with reference to Fig. 1, the gas
stand has connected thereto two tubular parts g₁, exactly similar to that
marked g in Fig. 1, to receive the tubes carrying the burners and the vertical
tube of the stand has adjustably mounted thereon a rotatable table or support /
faced with pottery. asbestos or other suitable non-conducting material on which the
article to be heated or brazed is placed.
It will be seen by this arrangement that the two flames can be made to impinge
upon any desired part of the article to be heated or brazed.
Electro-typers and others would simply attach the burner to a handle and use it
for the same purpose that the foot bellows and mouth blow-pipe are now used.
Two arrangements of this description are shown at Figures 4, 5 and 6. In the
arrangement shown at Fig. 4, the burner is shown attached to one end of a gas
tube passing through a suitable handle i and whose other end is connected by
flexible tube with a gas supply tuhe. In this case the needle valve d, instead of
being screwed to and fro by the milled head d as in the arrangements hereinbefore
described, is fixed in the centre of the tube by means of a cross pin d³ or in
other convenient manner; and in order to regulate the same in relation with the
gas nipple e the burner is screwed to and fro in the gas tube f by means of the
milled rim c fixed to the tube c' on which the gas nipple c is formed.
If however it is desired to obtain a non-regulating blast having no liability to
"light back "I use the arrangement represented at Figures 5 and 6 in which the
needle valve d is dispensed with; the burner a. b. c being identical in character
with those parts represented in the previous figures, excepting that the support b
is of cylindrical form instead of spherical and the burner is screwed directly into
the tube.
It will be evident that the burner herein shown and described may be applied to
various other purposes than those herein referred to.
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
1 claim is :-
1. An induction gas burner consisting of a short nozzle a having a slightly flared
exit and a bell mouthed inlet, and a gas jet nipple c arranged in line with said
nozzie, substantially as described.
2. An induction gas burner consisting of a short nozzle a having a slightly flared
exit and a comparatively long bell mouthed inlet, a gas jet nipple c arranged in line
with said nozzle, and a needle valve d controlling the amount of gas passing
through the nipple c, substantially as described.
3. An induction gas burner consisting of a short nozzle a having a slightly flared
exit and a bell mouthed inlet, a globular support provided with openings and into
which the nozzle extends, and a gas jet nipple rising into said support, substantially
as described.
4. In a gas burner, the combination of a gas stand provided with a gas cock, and
having a tubular member, a tube telescoping within said tubular member, and an
induction burner attached to said tube and provided with a nipple c and a nozzle a
and with inlets for air, substantially as described.
5. In a gas burner, the combination of a gas stand provided with a transverse
tubular member, a tube f telescoping within said tubular member and adapted to

page_text: turn in the same, a T attached to the outer end of said tube and provided with a
nipple e and with a nozzle a, and a needle valve controlling the amount of gas
passing through said nipple, substantially as described.
6. In a gas burner, the combination of a gas stand provided with a gas cock and
with a plurality of tubular members, tubes f telescoping within said tubular
members, induction burners attached to said tubes f, and an adjustable table h,
substantially as described.
Dated this 5th day of March 1897.
HARRIS & MILLS,
23 Southampton Buildings, London, W.C., Agents.