Year: 1886

page_text: I ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention (a communication from
Elias Arthur Jukes, Chemist and Arthur Jukes Johnson both of St Catharines,
Ontario Canada) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
L
The object of this invention is to design an automatic cut off for gas burners
which while operated by the gas jet will not in any way affect the appearance of
the flame; aud it consists essentially, of a metal tube placed parallel with and
sufficiently close to the burner that the heat from the gas jet will act directly upon
the tube, causing the same to expand and actuate a pivotted lever arranged to
come in contact with a notch or projection formed on a cut-off valve, or its
attachment, so that when the light is extinguished the valve is closed by the lever
upon the cooling and consequent contraction of the metal tube.
Figure 1 is an enlarged sectional view, showing a gas burner provided with
this improved automatic cut off.
•
Figure 2, is a perspective outside view of the same on a reduced scale.
Figure 3 is a perspective view of cut-off valve.
The primary object of all cut-off gas burners is, to so arrange the parts that
upon the flame being extinguished a valve shall be closed by the contraction of the
parts previously expanded by the heat of the flame, but in all such automatic cut-
off valves with which I am familiar the part to be acted upon by the flame is
carried through the said flame which is thereby caused to turn unevenly; to remedy
which defect is the primary object of this invention, while at the same time I
secured an automatic cut off simpler in construction and more effective in operation
than any other with which I am familiar.
In the drawing, like letters of reference indicate corresponding parts in each
figure..
3.6
A is the burner proper, which I provide preferably with two inlets a and b so
that the burner may be either attached to a vertical or horizontal pipe. It will of
course be understood that the inlet not used will be plugged.
On one side of the burner A, I form a projection d, in which I support, as
indicated a metal tube B. From the upper end of this tube B, a metal pendant, C,
extends to a point opposite the collar D, which is fixed to the burner A as
indicated.

page_text: A lug e projects from the collar D through a slotted passage-way in the tube B,
forming a pivot support for the lever E contained within the tube B, as indicated.
This lever E is also pivotted as indicated on the end of the pendant, C.
F is a cylindrical cut off valve passing through the burner A, and having an
aperture, f, through it to correspond with the passage-way g .through the burner.
It is of course intended that this valve, F, shall be packed or otherwise made
gas-tight, but at the same time it is intended to move freely longitudinally through
the burner.
. In order to prevent the valve F, revolving and thereby alter the position of its
aperture I provide a pin h fixed at one end to the burner and passing through a
slot made in the cut-off valve, F.
H, is a trip or handle pivotted to the end of the valve F, and having a notch j
made on its top side.
I is a spring arranged to come in contact with a pin or projection connected
to the cut-off valve, F. The spring I is arranged to press the valve, Fin the
direction indicated by arrow, so that when not otherwise acted upon the valve, F,
will be held as indicated in Figure, 1, so that its aperture, f, shall be immediately
in the passage way g.
It will of course be necessary to provide a suitable stop to prevent the spring
carrying the valve too far in the direction indicated. This stop may be in the
form of a pink or other suitable means might easily be devised.
As Figure 1 represents the burner lighted it of course follows that the tube, B,
is expanded and consequently as the lever, E, is pivotted on the end, of the
pendant, C, it is moved upwardly by the expansion of the tube, B, and as it is also
pivotted, on the lug e secured to the burner A by the collar D and which is not
moved by the expansion of the tube, B, the lever, E, is carried from its initial
position indicated by dotted lines into the position it is shown by full lines where
its end fits behind the notch ; the trip, H, being actuated upwardly as well as
outwardly by the spring I.
Should the flame from the burner A be blown or otherwise accidentally put out
the tube B, will naturally contract as it cools, consequently the lever,: E, will be
pushed back into its initial position, carrying with it the valve, F, thereby closing
the passage way, g, and effectually cutting off the gas from the burner should it
not have been previously turned off by the ordinary gas cock.
As the spring I is as before stated, designed to hold the trip, H, upwardly, and
thereby keep the notch j in contact with the end of the lever, E, it follows that
so long as the trip H is not touched the valve, F, will be held closed by the lever, E,
and no gas will escape, nor can the burner be lighted until the trip, H, is pressed
down so as to clear its notch j from the end of the lever, E, when the action of the
spring, I, will cause the valve to move back in the direction indicated by arrow,
until the aperture f comes opposite to the passage-way g.
In order to ensure the immediate and rapid expansion of the tube, B; I provide
a small jet, m, which will of course light with the burner, and by acting directly
on the tube B as indicated will materially assist in its expansion, which assistance
will be of considerable advantage should the burner when lighted be turned down
so low as not to produce sufficient heat for the rapid expansion of the tube B.
The drawing represents the burner A and tube B contained within a casing J.
This casing is not necessary for the satisfactory working of this automatic cut-off,
but as it might be ornamented and the tube, and burner arranged within it so as
to give the appearance merely of a single burner it is to that extent important.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is
1. A tube, B, supported substantially parallel with and in proximity to the
burner, A, in combination with mechanism connecting the tube, B, to the cut-off
valve, F, in such a manner that the contraction of the tube, B, shall actuate the

page_text: valve, F, so as to cut off the gas in the burner, substantially as and for the purpose
specified.
2. A tube, B, supported substantially parallel with and in proximity to the
burner, A, a pendant, C, attached to the tube, B, and forming a support for the
pivot connecting it to the lever, E, in combination with the lug e, attached to
the burner A and forming a support for the pivot connecting it to the lever, E,
substantially as and for the purpose specified.
3. A tube, B, supported substantially parallel with and in proximity to the
burner, A, a lever, E, provided with two pivots, one connecting it to the tube B,
and the other to the burner, A, in combination with a cut-off valve, F, situated as
specified, and provided with a notch or projection to connect it with the lever, E,
substantially as and for the purpose specified.
4. A cut-off valve, F, provided with an aperture, f, to correspond with the passage-
way g, and a slot i to form a passage-way for the pin, h, in combination with a
spring I arranged to actuate the cut-off valve, F, substantially as and for the
purpose specified.
5. A cut-off valve, F, having a trip, H, pivotted to it, a notch, j, formed on the
top of the said trip, in combination with a spring, I, arranged to actuate the
valve, F, outwardly and the trip H, upwardly, substantially as and for the purpose
specified.
6. A tube, B, supported substantially parallel with and in proximity to the
burner, A, mechanism for connecting the said tube to the cut-off valve, F, in
combination with the jet, m, arranged to act on the tube, B, substantially as and
for the purpose specified.