Improvements in Automatic Cut-off Attachments for Gas Stoves.
Year: 1899

page_text: Date of Application, 15th June, 1899-Accepted, 29th July, 1899
COMPLETE SPECIFICATION.
Improvements in Automatic Cut-off Attachments for Gas Stoves.
We, CLIFFORD BARGAMIN, Inventor, of No. 136, 29th Street, Newport News,
in the County of Warwick and State of Virginia, and OLIVER DOUGLAS BATCHELOR
Lawyer, of No. 2400, West Avenue, Newport News, in the County of Warwick
and State of Virginia, one of the United States of America, do hereby declare
the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to automatic cut-off attachment for gas stoves. The
object of the invention is to provide a cut-off attachement adapted for connection
with stoves as already constructed and on the market.
To this end the invention consists in the combinations hereinafter described and
claimed, the complete attachment involving a valve casing having screw nipples
extending in opposite directions from the casing proper and a bracket extending
laterally and substantially at right angles with the nipples, a valve suitably
seated in the casing, a valve operating arm pivotally connected with the bracket
and suitably coupled with the valve stem, a spring arm carrying a knob or plate
at one end and provided with a socket for clamping or coupling the same with
the gas supply pipe of a stove, and means for coupling, as a link, the spring arm
and the valve operating arm.
In the drawings,
Figure 1 is a broken plan of a well known form of gas stove, showing the
invention applied thereto.
Figure 2 is a front elevation of the same.
Figure 3 is a section on the line 3-3 of Figure 2.
Figure 4 is a section through the valve casing of the attachment showing the
valve and its stem in elevation.
Figure 5 is a perspective of the entire attachment detached from the stove.
1 is the top of a gas stove of well known construction, 2 being the gas supply
pipe or connection for supplying gas to the burners, and 3 represents the old or
conventional style of cock or valve for opening and closing the passage from the
supply pipe to the burners. Our attachment, which is intended to take the place
of the old form of valve as shown at 3, consists of a valve casing 4 having
nipples 5, 5, extending in opposite directions for connection between the gas
supply pipe and the burner passage in the stove in the same manner that the old
style valve casing is applied. In other words, our valve casing is interchangeable
with that of the old form of valve casing. Connected with our valve casing is a
bracket 6 extending outward and upward, and to the upper end of this bracket
is pivoted a valve operating arm 7 suitably connected with the valve stem S of the
valve 9. The other extremity of valve operating arm 7 is connected through the
medium of a link 10 with a spring arm 11 carrying at its extremity a knob or
plate 12, and connected at the other end with a clamping eye or socket 13, the
socket 13 being of suitable dimensions for grasping and clamping the gas supply
pipe 2 of the stove. As shown in Figures 1 and 3 of the drawings the spring
arin 11 extends from the gas supply pipe inward through the stove to a position

page_text: adjacent to or within the burner of the stove, the part 12 projecting one-fourth of
an inch, more or less, above the plane of the top of the stove, so that when a
vessel or article to be heated is placed upon the stove the knob 12, together with
arm 11, is depressed, and through link 10 and arm 7 the valve 9 is opened to
permit a full flow of gas, and when the vessel or article is removed from the stove
the spring arm, through link 10 and valve operating arm 7, closes or throttles
the valve as the case may be, in this way ordinarily cutting off the gas or cutting
down the consumption of gas upon the removal of the vessel or article from the
stove. The link 10 is threaded at its upper end and is provided with a thumb
nut 14 for adjusting the valve operating arm 7 so that the valve will be held open
slightly to not entirely extinguish the flame in case the stove is to be held open
in use.
It should be noted that through this thumb nut the adjustment can be
made so as to partially cut off the gas, thereby maintaining a slow fire or low
heat for keeping articles warm or for other purposes as may be desired. In other
words, the adjustment is such that when the arm 11 is depressed a full head or
partial head of gas may be admitted to the burner and that the valve may be
nearly or entirely closed upon the removal of the vessel and release of the spring
arm. We have shown in connection with our attachment a spring 15 for normally
holding the valve closed, notwithstanding the valve would be held closed through
the medium of spring arm 11. The knob or plate 12 should be made conical or
convex on its upper surface so that in moving a vessel or article laterally over
the top of the stove it will operate to depress the arm and not interfere with the
sliding movement of the vessel.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. As an article of manufacture, an automatic cut-off attachment for gas stoves,
comprising a valve casing having oppositely disposed nipples, and a bracket;
a valve; a valve operating arm; a spring arm carrying a knob or plate, and a
socket for grasping the gas supply pipe of a stove; and means for coupling the
spring arm and the valve operating arm, substantially as described.
2. As an article of manufacture, an automatic cut-off attachment for gas
stoves, comprising a valve casing having oppositely disposed nipples for con-
venient connection between the gas supply pipe and the burner passage of a
stove, and having a bracket projecting upwardly, a valve, a valve operating arm,
a spring arm carrying at one extremity a knob and having at the other extremity
a clamping socket for embracing the supply pipe of a stove, and means for
adjustably coupling the spring arm and the valve operating arm.
3. In automatic cut-offs for gas stoves, the combination of a valve, means-for
automatically opening and closing said valve, consisting of a spring arm carry-
ing an upwardly projecting knob at one end, a valve operating arm, and a link
connecting the spring and the valve operating arms, substantially as described.
4. In automatic cut-offs for gas stoves, the combination of a valve and means
for automatically partially opening and partially closing said valve, consisting of
a spring arm carrying an upwardly projecting knob or plate, a valve operating
arm, a link for coupling the spring arm and the valve operating arm, and means
for adjusting the levers with relation to each other, substantially as described.
Dat 141 love of Tuo 1900
BOULT & WADE,
Agents for the Applicants.