Means for the Automatic Control of Gas Supply in Gas Cooking Stoves.
Year: 1896

page_text: Date of Application, 23rd Sept., 1896
Complete Specification Left, 8th Dec., 1896-Accepted, 30th Jan., 1897
PROVISIONAL SPECIFICATION.
Means for the Automatic Control of Gas Supply in Gas Cooking
Stoves.
JOHN WYNN 32 St. Mary Street Cardiff Auctioneer, House Land and Estate
Agent do hereby declare the nature of this invention to be as follows:-
Attached to the ordinary gas tap for regulating the supply of gas to the ring
burners on the top of any cooker no matter what shape size or construction is a
tube inside of which works a spring this tube and spring is supported by ordinary
iron brackets fastened to the inside top of cooker upon the outside of this spiral
tube is fastened a keyed crank with a wheel on the top placed just high enough
above the bars of the cooker to cause the act of putting the vessels on to throw
the wheel crank over and turn on the gas "simmering " boiling keeping warm
"galloping" is effected by moving the vessel to and fro over the wheel, whea
removed altogether the spring brings the wheel crank upright & puts the
gas out.
Means for the Automatic Control of Gas Supply in Gas Cooking
Stoves.
I, JOHN WYNN, of Andrew's Hall Chambers, 32 St. Mary Street, Cardiff, in
the County of Glamorgan, South Wales, 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:-
This invention relates to means whereby the supply of gas to the burners of gas
cooking stoves is automatically regulated when the vessel to be heated is placed
upon the bars above the burner.
According to my invention I connect with the plug of the gas tap or cock for
regulating the supply of gas to the burner, a spring-controlled arm which projects
above the bars of the stove and is so arranged that when a vessel is placed on the
stove above the burner the said arm will be shifted in opposition to the spring and
the gas turned on. For obtaining various heating effects such as boiling,
simmering and warming, the vessel is moved to such a position that the arm can
move backward or rise more or less by the action of the spring whereby the tap
will be partially closed. For cutting off the gas supply altogether the vessel is
entirely removed from contact with the arm which is thus permitted to move
backward or rise under the influence of the spring, and the tap is then quite
closed by the spring. To facilitate the action I furnish the arm with a roller at
its end.
In order that my invention may be more clearly understood I will describe the
same with reference to the accompanying drawing which illustrates in vertical

page_text: section the upper part of a gas cooking stove having a convenient form of my
invention applied thereto.
A is a burner situated beneath the bars B and connected with a gas supply
pipe C by a tube D and a tap E. The plug of the tap E is connected with and
operated by means of a tube F which has fixed to it an arm G furnished with a
roller H at its free extremity. The arm is adapted to project between and above
the bars B and is maintained in this position when the burner A is not in use by
a spring I contained within the tube F. The said spring is secured at one end to
the plug of the tap E, and at the other end to a cap J which is supported by the
stove and which can be adjusted so as to vary the effort of the spring on the tube F
and arm G. When the spring has been adjusted, the cap J is secured by means
of a pin or set screw L adapted to be pushed or screwed into a hole in some part
such as the fixed bearing N for supporting the tube F. O is a pilot burner
supplied with gas through the pipe P which communicates with the main supply
pipe C.
When a vessel is placed on the bars B above the burner A it cants or moves
forward or depresses the arm G which through the agency of the tube F turus
the plug of the cock E and so opens the gas supply to the burner A where the
mixture of gas and air is ignited by the pilot light at the burner O. The heating
is regulated by moving the vessel from the position where it is directly over the
roller H to a position where it will allow the roller to project more or less above
the level of the bars B and so partially close the gas supply cock E. On removing
the vessel entirely away from the roller so as to free the arm G the spring I
turns 'the tube F and thereby closes the cock E. It is obvious that other
arrangements of the spring for actuating the arm G may be adopted.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
-claim is :-
1. In a gas cooking stove a spring-controlled arm connected with the plug of the
gas supply tap, and adapted to be moved by the act of placing or shifting the
vessel on the stove above the burner, substantially as and for the purposes
specified.
2. The means for automatically controlling the gas supply in gas cooking stoves
substantially as described with reference to the accompanying drawings, and
operating as specified.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.