Year: 1887

page_text: We JOHN GREAVES HAWKINS of Granville Street, Gas Engineer, and JOHN
BARTON Engineer and Secretary of the Gas Works, both of Peterborough, in the
County of Northampton 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 has for its object the construction of gas burners in such a manner
that when in use the gas issuing from them may be uniform in quantity under varying
pressures.
In order that the invention may be readily understood drawings are attached
hereto, Fig. 1 being an elevation of the burner, with part of it in section so as to
show its internal construction, and Fig. 2 is a modification thereof.
The invention according to Fig. 1 consists of a metal case A in which a steatite
nib B is inserted in the usual manner. The inside of the case is made with two
shoulders as at C and D, and from E downwards it is contracted. F is a metallic
diaphragm of the form shown, fits closely and is thrust down the case as far as it will
go, or until it rests at the commencement of the contracted part. The central portion
of the diaphragm is made cylindrical, with two or more conical shaped openings G.
Within the cylinder a plug H attached to a spindle I is capable of rising and falling.
Above the diaphragm F and attached to the spindle is a metallic disc J, the centre of
which is stamped or formed into a cone K, which acts as a valve and has for its seat
a fixed diaphragm L, that fits the case tightly and rests upon the shoulder D. The
spindle I is prolonged sufficiently to pass through a central aperture in the fixed
diaphragm M that serves as a guide and rests on the shoulder C of the case. The
diaphragm M has also a number of perforations for the passage of the gas to the
nib B.
In Fig. 2. it will be seen that there is a modification of the plug H, the plug having
in this instance two or more inverted conical grooves or channels O formed in its
periphery.
On gas being admitted to the
Fig. 1, or through the grooves O
under side of the disc J which rises
burner it passes through the conical openings G
Fig. 2, and exerts an upward pressure upon the
and causes the plug H to rise also and partially

page_text: close the conical openings G Fig. 1 or 0 Fig. 2. The quantity of gas passing is
therefore restricted, but in order that the regulation shall be more perfect it has to
flow by the sides of the disc J into the chamber N where a downward pressure is
exerted upon the conical valve K while passing through the valve seat on its way
to the point of consumption. The pressure therefore to which the burner is adjusted
is the difference between the pressure entering through G and the pressure at its
passage through the seat at L, and by the adoption of burners so made the pressure
at the point of combustion may be made uniform irrespective of the varying pressure
at the point of supply. The pressure at the point of combustion may be varied by
increasing or diminishing the weight of the moving parts.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is,
1. The construction of gas regulating burners with diaphragms F, L and M
arranged as herein described and shown on the drawings Figs. 1 and 2, and
2. The construction of gas regulating burners with two valves H and K and disc J
as herein described and shown on the drawings Figs. 1 and 2.