Year: 1886

page_text: gentlemen, 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:―
Our invention relates to that class of gas burners in which the gas is auto-
matically cut off when the flame is extinguished so that there will be no escape of
gas into the room when the gas blown out by accident or design, and it consists
in a certain thermostatic device located within the burner and adapted to operate
a valve, all as will be hereinafter described and the points of novelty pointed out
particularly in the claims at the end of the specification.
In the drawings:-
Figure, 1, is a perspective view of a gas burner constructed in accordance with
our invention.
Figure, 2, is a vertical sectional view thereof.
Figure, 3, is a similar view of a modified form of burner.
Figure, 4, is a side view of the central tube within which the valve operating
devices are mounted.
Figure, 5, is a sectional view showing a device for operating the valve from the
outside.
Figure, 6, is a perspective view of one of the thermostatic rods or strips for
operating the valve.
Similar letters of reference in the several figures denote the same parts. Hereto-
fore burners of the class to which our invention belongs have been constructed
with thermostatic expansive bara held above the burner and in direct contact with
the flame of the gas and when the flame was extinguished the bar, by its con-
traction, automatically shuts off the gas below the burner. Such constructions as
these it will readily be seen are unsightly and require a great deal of nice fitting,
packing, &c., in order to have them operate properly, but all these defects and
others are remedied by our invention which consists essentially of an outside
casing and an inside chamber containing the operating mechanism and having at
its upper end the lava tip or burner proper and a valve in said inner casing
adapted to be opened by a thermostatic rod or bar and closed by a spring as will
now be explained.
A, represents the outer casing adapted to be screwed into the gas bracket and
having the appearance of an ordinary burner.
B, the inner casing consisting of a tube having at its upper end the ordinary
lava tip or burner proper, D, to which it is secured and which connects it to the

page_text: casing, A. At the lower end of this tube is a cap, E, secured thereto by means of
screw threads or otherwise and at or near the center of this plate or cap is
preferably provided a screw, e, having a broad head adapted to cover when
screwed in, two small pin holes, e¹, e, extending through this plate on either side
of the screw stem as shown, for a purpose to be presently explained. F, is a
small valve placed in the side of the central tube fastened by means of a screw, f,
to a small spring, G, which is in turn secured to the tube, B. The screw, f, extends
through this valve and projects a short distance toward the center of the tube
where it is adapted to be operated by the thermostatic rod or bar at certain times.
The rod or bar, G, is constructed as shown in figure, 6, and consists preferably of a
long piece of brass, g, broadened hear one end and having the elongated opening
or slot, gl, therein the extreme end however being made quite small and screw
threaded as shown for the reception of a small nut, g'. This brass rod is preferably
bent slightly near the slot so as not to obstruct the passage to the burner tip and
to it is soldered or brazed a small piece of spring steel, h, surrounding the opening
and extending a short distance on either side thereof. Or if desired any two
metals of different degrees of expansibility may be employed instead of the brass
and steel. This rod, G, is secured at its upper end to the lava tip of the burner by
having its reduced and screw threaded portion inserted through a small perforation
at one side of the alot in the tip and the nut, g, applied thereto and tightened so
as to fasten it securely, the steel portion of the rod being on the side toward the valve
so that when the rod is heated the brass portion expanding the most will curve the
bar to the position shown in dotted lines in figure, 2, and its end coming into
contact with the extended end of the screw in the valve will push the valve open
and allow the gas to escape at the tip and be ignited. Now in order to have the
rod heated and the valve opened when the lighted match is held at the end of the
burner the end of the rod is extended through the tip and projects in close proximity
to the alit in the burner and the rod being thus heated the unequal expansion
of the metals will curve it and open the valve as indicated against the tension of
the spring and allow the gas to escape and be lighted and after ignition the flame
will heat the bar sufficiently to keep it expanded and the valve open, but just as
soon as the light is extinguished the rod cooling contracts and allows the spring
operating the valve to close the latter to its seat and shut off the supply of gas and
prevent its escape into the room. If desired the thermostatic rod may be connected
rigidly to the valve stem so as to operate in both directions instead of allowing the
spring to close it alone as described.
In figure, 3, we have shown a form of burner slightly different from that shown
in figures, 1, and, 2, and consisting of two thermostatic rods, G, G³, one on either
side of the slit in the burner tip. The lower end of the longer of the rods, G¹, is
adapted to come into contact with the pin and operate the valve as in the former
construction, and it is provided about midway of its length with a short screw or
pin, i, adapted to project through a perforation in the end of the rod, G*, and
having a head or nut upon its outer end as shown. This rod, G2, is similar to the
rod, G, except that it is about half as long and will consequently move quicker
under the influence of heat and its lower end is provided with a perforation
through which the pin, i, upon the rod, G, projects. The side of the rods on which
the steel plate is secured being next the valve side of the tube, B, it, follows that
when the rods are heated they will both expand in the same direction and if the
shorter rod reaches the maximum amount of expansion first it will by reason of the
head on the pin, i, pull the rod, G¹, over and cause its lower end to operate to open
the valve, while if the rod, G', only is heated it will move of itself and open the
valve without affecting the rod, G³, thus always insuring the operating of the valve
when the match is applied to the burner tip. The lower end of the central tube, B,
may if desired be held in central position and out of contact with the sides of the
casing, A, by means of a perforated plate, H, secured to it in any suitable manner.
Often times it is undesirable to wait until sufficient beat has been applied to the
thermostatic rods through their swall ends at the end of the burner, to open the

page_text: valve and we therefore provide the two small pin holes before referred to in
the end of tube, B, so that a very small quantity of gas can escape just sufficient
to give a small flame at the tip that will at heat the rods and open the valve
turning on the gas full. By means of the screw, e, the amount of gas passing
through the pin holes can be regulated or shut off entirely. When it is not desired
to have any gas escape when the stop cock in the bracket is opened and yet it is
not desirable to wait until the heat from a match has opened the valve we provide
a device for the opening of the valve by the operator from the outside of the
burner and holding it open until the rods are sufficiently heated by the gas flame
itself to act upon it. This device consists of a plate, I, secured to the tube, B,
above the valve and projecting out slightly to one side thereof and having at its
lower end an arm or projection, j, projecting under the valve spring as shown.
J, represents a pin or rod passing through the casing, A, and its inner end resting
against the spring plate, I, at the side of the tube, B, as shown, tending to press
the pin outwards and having a head on its outer end by means of which it is
operated to press the plate I, inward raise the valve from its seat and permit the
gas to escape and be ignited at the tip as will be readily understood. In order to
prevent the escape of gas through the perforations in the side of the casing, A,
through which the pin, J, passes we preferably provide a collar, J', upon the pin
which normally is pressed against the inside of the casing making a tight joint
therewith.
From the above description the operation of the device will be apparent. When
the valve operating pin, J, is used the operator presses upon it and holding the match
at the tip ignites the gas then holds the pin pressed in a few seconds until the rod or
rods are heated from the gas flame when the valve will be automatically held open
until the gas is extinguished and then the rod or rods contracting will allow the
valve spring to operate and shut off the supply of gas.
If desired the valve
operating rod or pin may be dispensed with and the screw in the end of the
tube, B, screwed out allowing a little gas to pass out as before explained through
the pin holes or both these forms may be dispensed with and the heating of the
rods from the match be relied upon, the latter being the simplest construction.
The thermostatic rod constructed as shown with the broad portion where the steel
piece is secured and the provision of the slot therein greatly increases the sensitive-
ness of the rod by reason of the comparatively large amount of metal exposed and
causes the valve to close quite suddenly when the gas is extinguished. The top, D,
may be made of metal if desired in order to conduct the heat more rapidly to the
rod, G. The whole device above described can be manufactured very cheaply as
compared with other burners of this class heretofore produced and as will be
observed is very simple and certain in operation.
Having now particularly described & ascertained the nature of our said inven-
tion, & in what manner the same is to be performed, we declare that what
we claim is
1st. The combination with a gas burner, of a valve arranged in the gas passage
thereof and a thermostatic rod or bar for actuating said valve located within the
burner having one end extending outside the burner and arranged in proximity to
the burning orifice said bar being arranged in relation to the valve substantially as
described whereby it will operate to open the valve in the gas passage when
expanded under the influence of heat, substantially as described.
2nd. The combination with a gas burner, a valve located in the gas passage
thereof and a thermostatic rod or bar secured to the burner tip and located within
the casing, said bar being arranged in relation to the valve substantially as
described whereby it will operate to open the valve in the gas passage when
expanded under the influence of heat, substantially as described.
3rd. In a gas burner the combination with the outer casing the inner closed
chamber having the valve therein and the tip at its upper end, the thermostatic
rod or bar secured to the tip and located within said inner chamber having one

page_text: end extended through the tip and in proximity to the burning orifice and its other
end in one position in contact with, the valve so as to operate it, substantially as
described.
4th. In a gas burner the combination with the outer casing, of the inner casing
having the tip at its upper end, the valve and the spring for closing it and a
thermostatic rod or bar located within the burner having one end close to the
burning orifice and the other arranged in proximity to the valve to open it when
the rod is heated, substantially as described.
5th. The combination with the gas burner & the valve located in the gas passage
thereof, the two thermostatic rods or bars each having one end in close proximity
to the burning orifice, one of said rods in one position being in contact with the
valve and the other connected to the first mentioned rod by means substantially as
described, so as to cause it to operate upon the valve when said rods are expanded
under the influence of heat as set forth.
6th. The combination with the gas burner, the valve located in the gas passage
thereof & the spring for closing it, the two thermostatic rods or bars located
within the burner each having one end in proximity to the burning orifice, one end
of said rods having the headed pin thereon in one portion in contact with the
valve, and the other rod having the perforation through which said pin projects,
substantially as described.
7th. The combination with a gas burner of the inner chamber communicating
with the burning orifice and having the valve therein, the thermostatic rod or bar
connected with the valve substantially as described and a small supplemental
opening or openings in the inner chamber and a regulating valve for said opening,
substantially as described.
8th. As a new article of manufacture an automatic gas extinguishing tip for
application to the open end of a tube or burner body substantially as described
consisting essentially of a chamber and a burner or tip applied thereto, an orifice
communicating with the interior of said chamber, a valve for closing said orifice
and an automatic thermostatic device actuating said valve for opening the latter to
admit gas to the chamber and tip when heat is applied to the latter as in lighting
and closing said valve when the light is extinguished, substantially as described.
9th. The combination with the burner tip, of the chamber, B, having the valve
therein, and the thermostatic rod for opening said valve having the reduced end
screw threaded as shown passing through the burner tip and the nut applied to its
outer end to hold it in position, substantially as described.
10th. In a gas burner the combination with the outer casing, the inner casing,
the valve therein mounted upon the spring and a thermostatic device located
within the inner chamber for opening the valve, the supplemental spring, I, and
the pin, J, projecting through the outer casing and in contact with the spring, I,
whereby the valve may be operated from the outside independent of the thermo-
static device, substantially as described.
11th. The combination with the outer casing, the inner casing and valve therein
mounted upon the spring, the supplemental spring, I, and, pin, J, in contact with
the supplemental spring having the collar thereon, substantially as described.
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