Improvements in or relating to Atmospheric Gas Burners.
Year: 1897

page_text: Date of Application, 7th Jan., 1897-Accepted, 27th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in or relating to Atmospheric Gas Burners.
I, PRUST SYMONS, of 11 Union Street, Swansea, in the County of Glamorgan,
Sanitary Engineer, 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 :-
The object of this invention is to construct or provide atmospheric gas burners
with means whereby the quantity of air admitted to the burner is regulated by.the
operation of the gas tap or cock.
My invention may be applied to existing atmospheric gas burners, but preferably
I make a special atmospheric gas burner with the mixing chamber situated near to
the gas tap or cock. Into this mixing chamber the gas supply from the tap is led
in the ordinary way, and in the sides or ends of said mixing chamber one or more
air inlet ports are provided.
On the spindle of the gas tap, or on the exterior or interior of the mixing
chamber so as to be operated from the tap spindle by any suitable mechanism, is a
sliding or rotating plate or segment forming a shutter or shutters, and operating as
a valve or valves to open or close the air inlet port or ports as and when the gas
tap or cock is opened or closed.
In this manner the air supply to the mixing chamber is regulated so as to
correspond with the quantity of gas passing through the tap or cock thus minimising
the danger of explosions, or of the "lighting back" of the burner; which latter
frequently occurs in atmospheric gas burners, as heretofore used, when the gas
supply is turned down low.
In the accompanying drawings I have shown three examples of the manner of
carrying my invention into practice.
Fig. 1 is a side elevation of part of an atmospheric gas burner with the mixing
chamber situated near to the gas tap or cock, which latter is in the closed position,
with my invention adapted thereto; and Fig. 2 is an end elevation of same with
the tap or cock in the partially open position.
Fig. 3 is a side elevation showing my invention applied to an atmospheric gas
burner of the kind usually employed for heating a mantle to incandescence to
produce what is known as 66
an incandescent gas light";
Fig. 4 is a section taken on the line x x of Fig. 3.
Fig. 5 is a plan of a "Bunsen" burner such as is used in gas fires, with my
invention adapted thereto.
The same letters of reference where they occur are used to indicate the same or
corresponding parts in all the figures.
In the form shown in Figs. 1 and 2, the shutter A is made in the form of a plate
with an arm A¹ which is fast on the spindle B of the gas tap or cock C so that the
shutter A rotates with the spindle B and opens or closes the air inlet port D in the
mixing chamber E. G is the gas supply pipe, G₁ the gas outlet, opening in
the mixing chamber E, and F is the outlet for the mixed air and gas which passes
to the combustion jet or burner. For convenience in working this form of my
invention the gas tap or cock is fitted with a stop b so that it can only turn through
an angle of 90 degrees more or less and back again, thus ensuring that when the
gas supply is entirely shut off the air port D is completely closed by the shutter A.
An obvious medification of this form of my invention would be to secure a circular

page_text: dise or segment by its centre to the tap spindle said disc or segment being arranged
so as to operate as a hit and miss valve to the air inlet port or ports. Or a similar
bit and miss valve may be arranged on the mixing chamber, which is furnished
with a port or ports to correspond, and the valve rotated by gearing from the tap
spindle.
In the form shown in Figs. 3 and 4 the air supply is regulated by the cylinder
or sleeve A 2 which rotates on the outside of the cylindrical mixing chamber E,
and is furnished with apertures a 2 corresponding in size and position to the air
inlet ports D in the sides of the cylindrical mixing chamber E, all of the well
known construction. To adapt my invention thereto the sleeve A. 2, is provided
with a fixed radial arm A 3 which is bent downward at its end (see Fig. 3) and is
caught by a two pronged catch B 2 on the end of the arm B' which is firmly fixed
to the tap spindle B. This tap is also provided with a stop to limit its travel
through an angle of 90 degrees more or less and back again. In Fig. 4 the full
and dotted lines show the positions of the parts when the tap or cock is in the
closed and open positions respectively. As shown the rear prong of the catch B 2
is slightly longer than the front prong; when the radial arm A 3 is carried to the
dotted position by the opening of the gas tap, the catch B 2 leaves it and continues
to the full open position, on its return however the. longer rear prong of the
catch B 2 takes behind the radial arm A 3 and guides it into the slot between the
two prongs of the catch into the position shown by the full lines in Fig. 4 thus
rotating the sleeve A 2 and effecting the shut off of the air supply to the mixing
chamber.
In Fig. 5 the air supply to the mixing chamber E is regulated by two sliding
shutters A which are slid in suitable guides over corresponding air inlet ports D
by, means of the connecting rods B 3 which are pivotted at their ends to the
shutters A and to opposite ends of the double arm B¹ fast on the tap spindle B.
As the tap spindle is turned the valves are opened, one of the shutters moving
outwards and the other inwards, in the manner shown in Fig. 5, which represents
the partially open position of the tap spindle B and the shutters A.
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. An atmospheric gas burner in which the air supply to the mixing chamber
is regulated by a moving shutter or shutters acting as a valve or valves to the
air inlet port or ports and operated by or form the tap spindle substantially as
described.
2. An atmospheric gas burner in which the air supply to the mixing chamber is
regulated by a shutter secured to the tap spindle substantially as described and
illustrated in Figs. 1 and 2 of the accompanying drawings.
3. In an atmospheric gas burner of the kind shown in Figs. 3 and 4, means
substantially as described for regulating the air supply thereto by the operation of
the tap spindle.
4. In an atmospheric gas burner of the kind shown in Fig. 5, means sub-
stantially as described for regulating the air supply thereto by the operation of
the tap spindle.
F. W. GOLBY,
36 Chancery Lane, London, W.C., Patent Agent for the Applicant.