Improvements relating to Gas-heated Hot-plates for Cooking Purposes.
Year: 1890

page_text: Date of Application, 30th Apr., 18.90
Complete Specification Left, 30th Jan., 1891-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements relating to Gas-heated Hot-plates for Cooking
Purposes.
I, MICHAEL MARY BROPHY, of the firm of James Slater & Co., 251, High
Holborn, in the County of Middlesex, Engineers, do hereby declare the nature of
this invention to be as follows:-
This invention relates to gas-heated hot plates of the kind described in the
Specification of Letters Patent granted to me and dated October 11th 1888,
No. 14634, in which means are provided for preventing waste of gas.
In the waste preventing apparatus described in the said Specification it has
been found that when in use some of the parts become choked with grease and
dirt so as to render them inefficient if not properly cleaned.
The object of my invention is to obviate the defect and also to simplify the
construction of the apparatus.
In carrying out my invention I arrange the rod provided with the conical head
to pass through the air and gas mixing chamber of a Bunsen burner the gas being
admitted at the lower end of the said chamber by a suitable spring or other gas
valve attached to the said rod and issuing through and burning at a series of
openings at the top of the said chamber, a stuffing box and gland being provided
to prevent the escape of gas round the said rod. A tube extends from the opening
covered by the gas valve to a point inside the chamber hereinbefore described above
the top of the air openings in the said chamber to prevent any dirt or grease which
may lodge in the said openings from passing into the gas valve. The conical head
of the rod has a downwardly projecting lip or flange which serves to prevent any
dirt or grease from getting onto the stuffing box.
The top of the burner is made somewhat larger than the body of the same so as
to act as a support for the said burner which is passed into a hole in the hot
plate.
Instead of employing openings at the top of the burner through which the gas
issues to be burnt, I can connect the said top to a ring burner.
In some cases I dispense with the stuffing box and gland, any gas which may
escape burning either at the top of the opening through which the conical headed
rod passes or at a series of holes in the downwardly projecting flange or lip on
the head of the said rod through which it passes before burning; or I can
dispense with the said lip or flange and form the top of the burner so that
a narrow passage is left between it and the under surface of the conical head
for the gas to pass through and burn beyond the periphery of the said conical
head.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE STENUATION.
Improvements relating to Gas-heated Hot-plates for Cooking
Purposes.
I, MICHAEL MARY BROPHY, of the firm of James Slater & Co., No. 251, High
Holborn, in the County of Middlesex, Engineers, 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 gas-heated hot-plates of the kind described in the

page_text: Specification of Letters Patent granted to me and dated October 11th, 1888,
No. 14634, in which means are provided for preventing waste of gas.
In the waste preventing apparatus described in the said Specification it has been
found that when in use some of the parts become choked with grease and dirt so as
to render them inefficient if not properly cleaned.
The object of my invention is to obviate this defect and also to simplify the
construction of the apparatus.
In carrying out my invention I arrange the rod provided with the conical head
to pass through the air and gas mixing chamber of a Bunsen burner, the gas being
admitted at the lower end of the said chamber by a suitable spring or other gas-
valve attached to the said rod, and issuing through and burning at a series of
openings.
To enable my invention to be fully understood will describe the same with
reference to the accompanying drawing which represents the application of my
improvements to what is known as a ring-burner,
Figure 1 heing a plan: and,
Figure 2 a vertical section.
a is the burner proper; is the air and gas mixing chamber, which, as shewn,
is connected with the ring by means of three passages e, e, r, and d is the chamber
into which the gas is introduced from the supply-pipe e and from which it passes
into the mixing chamber through the nozzle is the gas-valve located in the
chamber d and acted upon by a spring so as to normally maintain the valve closed,
and is the rod by means of which the valve is operated and which extends upwards
through the chamber and the nozzle, and is provided with a conical head jat
its upper end, projecting above the level of the bars of the hot-plate in the manner
described in the Specification before referred to. The said conical head is provided
with a downwardly projecting lip or flange which prevents any grease or dirt
which may drop upon the said conical head from running down onto the rod i. By
this arrangement it will be seen that the rod i is thoroughly protected and is this
always free to work.
In some cases I provide a stuffing-box and gland m upon the top of the mixing
chamber to prevent the escape of gas around the said rod. This arrangement,
however, is unnecessary as any gas which escapes would be ignited and simply
augment the heat of the flames issuing from the openings in the burner-ring.
I sometimes form a series of holes in the flange k through which any gas escaping
around the rod may issue and burn.
Any suitable means may be provided for preventing the flame from being
completely extinguished when the valve is upon its seat; for instance a groove
may be formed in the valve seat as indicated by the letter n Figure 2 to allow a
small quantity of gas to pass.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
1 claim is :-
1. A burner for gas-heated hot-plates provided with a waste preventing valve,
the rod for operating which extends through the air and gas inixing chamber,
substantially in the manner, and for the purpose, described.
2. The combination with an atmospheric burner for hot-plates, of means for
preventing the waste of gas, substantially as hereinbefore described and illustrated