Improvements in Self-closing Gas Burners.
Year: 1893

page_text: Date of Application, 27th Jan., 1893—Accepted, 11th Mar., 1898
COMPLETE SPECIFICATION.
[Communicated from abroad by EDWARD FRANKLIN ANGELL, of No. 18,
W. Randolph Street, Chicago, Illinois, United States of America.]
Improvements in Self-closing Gas Burners.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co. Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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 :-
My invention relates to a self-closing gas burner; and has for its principal object
to provide against loss of life from asphyxia. A further object of my invention is
to construct a burner which shall regulate the flow of gas to the burner tip thereby
providing against waste.
My invention provides means whereby the flow of gas is cut off automatically
when the light has been blown out or accidentally extinguished without the supply
of gas being turned off at the cook.
:
In carrying out my invention I apply to the ordinary burner a thermostatic bow
composed of two strips of metal having a different rate of expansion under heat,
one end of the bow being fixed upon one side of the burner and the other being
secured with a pin valve, movable in a transverse aperture intersecting the supply
way of the burner, said pin valve having a port therein.
When the bow is expanded by the action of the heat, the flow of gas is permitted
through the burner, but when the flame is extinguished the contraction of the bow
moves the pin valve so as to cut off the supply of gas. I also employ a cam lever
loosely, mounted on the pin valve and adapted to be thrust between the free end of
the bow and the burner tubo so as to move the pin valve outwardly to open the
port and permit the flow of gas for lighting. The heat of the flame operates to
further expand the bow and to release the cam which will drop down out of the
way and then when the light is extinguished the bow will contract and the pin
valve will be thrust in and the flow of gus cut off. Any undue flow of the gas will
be checked by the increased expansion of the bow which will further withdraw the
pin valve so as to partially close its port.
In the accompanying drawing :
Figure 1 is a side elevation of my improved burner and a supply pipe therefor
having an ordinary stop cook.
Figure 2 is.au elevation taken at right angles to Figure 1 showing the parts in a
position to cut off the supply of gas to the burner.
Figure 3 is a side elevation, partly in vertical section, showing the bow held out
by means of the cam.
Figure 4 is a similar view, the flame being indicated and the bow being expanded
by the heat thereof and the cam dropped so as to clear the bow.
Figure 5 is a broken sectional view showing the valve in position to partially
close the port.
In the drawing, 7 indicates a gas supply pipe having a cock 8 therein. 9 repre-
sents a burner tube section secured therewith, and having a vertical_gas passage 11
and also a transverse aperture therein to receive the pin valve.15. 12 is. the burner
tip. 13, 14 represent two metal plates secured together to form a thermostatio
bow, the two strips of metal expanding at different degrees of heat, and such metals
as iron and copper or iron and steel may be employed. This bow is wide in the
arch over the tip and has a slit therein for the flame. One end of the bow is
secured on one side of the burner and the other with the pin valve 15, said valve
being adapted to move in the transverse aperture of the burner tube and having a
1 shunin

page_text: 17 represents a sleeve surrounding one end of the pin valve, and 18 a screw to
limit its movement. 18ª represents a cam lever which is pivoted on the pin valve
and having rounded ears 19 which when the cam is turned.engage the burner tube
and withdraw the pin valve so that its port will register with the supply way in
the burner tube, as shown in Figure 3. When the flame has expanded the bar
further, the cam lever will drop as seen in Figure. 4. Should the flame: be
extinguished without cutting off the flow of gas by means of the cock 8 in the
supply pipe, the compound bow will contract and in a short space of time thrust
the pin valve in, as seen in Figure 1, thus automatically cutting off the flow of gas
before à sufficient quantity has escaped to produce asphyxia or injury.
"I am aware that it is not broadly new to provide means for automatically cutting
off the supply of gas when the flame has been extinguished otherwise than by the
use of the cook intended for that purpose, but so far as I am aware the means
which I have employed are novel in their combination.
L
A novel and useful feature of my improved burner is its adaptability to the
Baving of gas. Heretofore in burners of this kind provision is made for cutting
off the supply of gas only when the flame has been extinguished, but with my
improved devices should the gas pressure be so strong that- an undue amount of
gas would be consumed, the bar will be less-heated and the pin valve moved so
far in as to partially close the supply way, thus diminishing the supply, as clearly
shown in Figure 5. The device therefore operates not only as..a safety.burner,
but also as a gas saving and flame regulating device. Where there is an excess
of gas pressure the flame does not spread so much and therefore: tho. bar is not
Bo much affected by the heat.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated to
mo by my foreign correspondent, I declare that what I claim is
1. In combination with a gas burner a thermostatic bow. having one end secured
to the side of the burner and archod above the tip thereof, a pin valve secured
with the free end of said bow, a transverse aperture through which the pin valve:
slides,. said. aperture intersecting the supply way of the burner and a pivoted
cam lever adapted when turned to thrust the bow outward whereby to move the
valve and cause its port to register with the supply way, said cam lever adapted
when released to drop down so as to release the bow, substantially as described.
2. The combination with a gas burner having a supply way and a transverse
aperture intersecting said supply way, a thermostatic bow having ono end secured
to, the burner and the other to a pin valve adapted to slide in said aperture, said
pin valve being normally in position to close said aperture, manually operated
means independent of the supply cock for moving the pin valve to cause its port
to register with the supply way, said bow, when less heated by reason of excess
pressure of gas, being adapted to contract and move the pin valve-so as to partially
close the port thereof whereby the quantity of gas consumed is regulated,
substantially as described..
Dated this 27th day of January 1942