Improvements in the Conduits or Tubes of Gas Burners through which Mixed Gas and Air Pass to the Outlets at which they are Burnt.
Year: 1895

page_text: Date of Application, th July, 1895
Complete Specification Left, 1st Apr., 1896--Accepted, 2nd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in the Conduits or Tubes of Gas Burners through
which Mixed Gas and Air Pass to the Outlets at which they
are Burnt.
We, THE CANNON HOLLOWWARE COMPANY, LIMITED, of Deepfields in the
County of Stafford, Ironfounders, and THOMAS WARD, Manager in the Gas
Stove Department of the said company, do hereby declare the nature of this
invention to be as follows:-
--
It is a common defect with gas burners of the Bunsen type, in which air and gas
are mixed together within a conduit or tube through which they pass to the outlet
opening or openings at which they are burnt, that the flame is liable to run back
along such conduit or tube and thus burn at the inlet opening or openings instead
of at the outlet opening or openings.
Now, this invention has for its object to prevent the flame running back along
such conduit or tube; and this is accomplished by forming the conduit or tube
with two or more quick bends so that any back flow therealong is checked
sufficiently to prevent the flame travelling back through the length of the conduit
or tube. The conduit or tube is in practice, preferably, formed of a syphon-shape
by making it of three lengths, of which one is joined at its opposite ends,
respectively, into each of the others by means of a quick bend. One of the ends
of the bent conduit or tube receives the mixed gas and air, and the mixed gas and
air are burnt at the other end of such tube, or at an opening or openings formed in
a nozzle or mounting joined to such end. The lengths of conduit or tube which
are joined together by the quick bends, as aforesaid, may be arranged to run side
by side, or two or more to run side by side and the other or others at an inclination
therewith; the shape of the tube being capable, as will be obvious, of considerable
variation. It is preferred, however, that the bends shall be return bends, that is
to say, of a semicircular shape along their longitudinal axes, or as nearly so as may
be convenient in regard to the purpose for which the burner is required.
Dated this 8th day of July 1895.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicants.
UUMI LEIE T
Improvements in the Conduits or Tubes of Gas Burners through
which Mixed Gas and Air Pass to the Outlets at which they
are Burnt.
We, THE CANNON HOLLOWWARE COMPANY, LIMITED, of Deepfields in the
County of Stafford, Ironfounders, aud THOMAS WARD, Manager in the Gas
Stove Department of the said company, 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 :—
It is a common defect with gas burners of the Bunsen type, in which air and gas

page_text: are mixed together within a conduit or tube through which they pass to the outlet
opening or openings at which they are burnt, that the flame is liable to run back
along such conduit or tube and thus burn at the inlet instead of at the outlet.
Now, this invention has for its object to prevent the flame running back along
such conduit or tube; and this is accomplished by forming the conduit or tube
with two or more quick or short bends from which the mixed gas and air flow in a
direction opposite to or considerably backward from that in which they approach
such bends, respectively, so that any back flow along such conduit or tube is
checked sufficiently to prevent the flame travelling back through the length
thereof. The conduit or tube, or part thereof, is in practice, preferably, formed of
a syphon-shape by making it of three lengths, of which one is joined at its opposite
ends, respectively, into each of the others by means of a quick bend. One of the
ends of the conduit or tube which is formed with quick bends as aforesaid receives
the gas and air, and the mixed gas and air are burnt at the other end of such tube,
or at an opening or openings with which such tube communicates and which is or
are situated beyond the quick bends thereof. The lengths of conduit or tube
which are joined together by the quick bends, as aforesaid, may be arranged to
run side by side, or two or more to run side by side and the other or others at an
inclination therewith; but the shape of the tube is capable, as will be obvious, of
considerable variation.
The applications of the invention may be varied indefinitely to suit the varieties
of gas burners of the Bunsen type in connection with which it may be required;
but in order that it may be clearly understood we will describe, by the aid of the
accompanying drawings, and by way of examples ouly, three applications thereof
in the case of articles in frequent use.
Figure 1 is a plan of a gas burning appliance of the Bunsen type for use with a
straight-bar open or domestic fire-grate for the purpose of rendering incandescent
a supply of asbestos placed loosely in the grate. Figure 2 is a sectional plan of
the appliance shewn by Figure 1; and Figure 3 is a section thereof. taken on
line of Figure 1.
The tubes along which the mixed air and gas pass on their way to the nozzles
are formed with straight portions a having open ends which receive the air and
gas in the usual manner. The portions a are joined at their outer ends by quick
bends c with straight portions d which run parallel with the portions a. The
portions d are joined at their inner ends by quick bends e with portions which
run parallel with the portions a and d; and the portions are joined at their outer
ends by quick bends g with the straight tube h with which the nozzles i directly
communicate. The parts lettered k are the ordinary guards to keep the asbestos
clear of the mouths of the nozzles. The quick bends which join together the
straight lengths of tube through which the mixed gas and air pass on their way to
the nozzles securely prevent the flame from running back and burning at the
inlets bb. In reality there is only one tube to the appliance, as the portion is
formed with a clear passage-way throughout; but in effect there are two tubes one
of which supplies mixed gas and air to one half the nozzles and the other to the
other half, and the middle of the portion h might be closed across with a diaphragm.
Each passage-way from an inlet 6 to a half set of nozzles is therefore regarded and
herein referred to as a single passage-way or tube. The upper sides of the
portions a of the tubes are made continuous with one another as shewn by
Figure 1, and as is usual, to keep down any gas which rises before entering the
tubes.
Figures 4, 5 and 6 correspond, respectively, to Figures 1, 2 and 3, but illustrate
the invention as applied to a gas burning appliance for use with a curved-bar open
or domestic fire-grate in which asbestos is to be rendered incandescent. The
parts of these views which correspond to those shewn by Figures 1, 2 and 3, are
similarly lettered. The portious a of the tubes through which the mixed gas and
air pass to the nozzles are shewn straight and the portions d and fas curved
concentrically with the tube h.

page_text: The
The remaining figures shew an application of the invention to a gas-heated box
iron. Figure 7 is a sectional elevation through the hinder end of the iron, taken
on line y y of Figure 8. Figure 8 is a plan of the hinder end of the iron; and
Figure 9 is a section taken along a plane indicated by line a¹¹ of Figure 1.
tube through which the mixed gas and air pass from the inlet end thereof of the
usual character to the usual perforated nozzle m is shewn as formed of three
parallel portions no p, of which the inner end of the portion n is joined by a quick
bend r with the portion o, and the outer end of the portion o is joined by a quick
bends with the portion p. The quick bends in this case, also, securely prevent
the flame running back and burning at the inlet.
Three quick bends are shewn with each passage-way or tube in the case of the
appliances illustrated by Figures 1 to 6, as the structural arrangement in the case
of each appliance renders this convenient, though two quick bends in each such
passage-way or tube would suffice for the purpose of the invention; but in the case
of the tube used with the box-iron, only two quick bends are shewn.
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. A conduit or tube of a gas burning appliance through which mixed gas and
air pass to the outlet or outlets at which they are burnt, having two or more quick
or short bends which having the effect on the direction of flow above defined
prevent the flame running back along the conduit or tube and burning at the inlet,
substantially as described.
2. A conduit or tube of a gas burning appliance through which mixed gas and
air pass to the outlet or outlets at which they are burnt, having lengths thereof
joined together by two or more quick or short bends, two or more of the portions
so joined together running side by side, substantially as described.
Dated this 31st day of March 1896.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicants.