Year: 1888

page_text: WC 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 at the point of supply.
In order that the invention may be easily understood drawings are attached hereto,
Fig. 1 being a part section and part elevation, and Fig. 2 also a part section and part
elevation, the view being taken at right angles to that of Fig. 1. Both illustrations
are drawn about four times linear the natural size in order to exhibit each part
distinctly. In each of the views similar letters refer to the same parts, and the arrows
show the direction in which the gas passes.
The following is a description of the burner.-A is a metal case in which a steatite
nib B is inserted in the usual manner. The inside of the case is made with a shoulder
at C and from E downwards it is contracted.-F is a diaphragm of steatite, metal or
other suitable substance, and 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.
In the centre of the diaphragm there is a hole large enough to admit of the plug or
valve H and spindle I rising and falling easily. Attached to the spindle I there is a
metallic disc which rises and falls with it between the diaphragms Fand L. Above
the diaphragm F there is a similar diaphragm L that fits the case tightly and rests
upon the shoulder C. This diaphragm has also a hole in its centre of such size only
as to allow of the upper part of the spindle I sliding up and down in it with ease. In
the lower diaphragm there is a slit G, and in the top diaghragm there is also a
slit D, in both instances the slit being cut through the lower part in the direction
of their diameters.
On gas being admitted to the case it passes through the slit G above the plug or
valve H, and exerts an upward pressure upon the under side of the disc J which rises
and causes the plug or valve H to rise also and partially close that part of the slit G

page_text: through which the gas flows. The quantity of gas passing is therefore restricted, but
in order that the regulation shall be more nearly perfect, it has to flow by the edge
of the disc J into the chamber N, where in consequence of the gas having to pass
through the upper part of the slit D and above the point of the pin or spindle I a
downward pressure is exerted upon the disc J and partially counteracts the pressure
on the underside of the said disc J which consequently falls and causes the pin or
spindle I to drop also, till there is sufficient space between its top and the upper part
of the slit D to allow of the required quantity of gas to pass through to the burner,
thus constituting a double action regulating burner. The result is that the pressure
to which the burner is adjusted is the difference between the pressure entering
through G and the pressure as it issues from the opening in the upper diaphragm
at P. By the adoption of burners made as described the pressure at the point of
combustion may be made uniform irrespective of the change of pressure at the point
of supply, or any increase, in the size of the nib. The pressure at the point of
combustion may
be varied by increasing or diminishing the weight of the moving
parts.
In lieu of the slits & and D circular or other shaped holes may be formed in the
diaphragm with equal effect.
Having now particularly described and ascertained the nature of our said
invention 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 and L having
slits G and D or other shaped holes, as herein described and shown on the drawings,
and
2. The construction of double acting gas regulating burners with a plug or
valve H, spindle I and dise J in combination with the aforesaid diaphragms F and L
as herein described and shown on the drawings.