Year: 1886

page_text: Date of Application, 12th Oct., 1886.
Complete Left, 11th July, 1887.
Complete Accepted, 16th Aug., 1887.
I, WILLIAM DEWHIRST, of No. 2 Dove Street, Saltaire, in the County of York,
Mechanic, do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in apparatus for the production of
oat cake and for the baking of the same with a more uniform heat. In order to
accomplish the above object I form a rectangular box say about 5 feet long, 20 inches
broad and about 6 inches deep, of cast iron, supported upon a suitable bench, having
a close fitting lid also of iron. Within the box, and midway between the bottom and
the top, I attach two oval boxes say 16 inches by 9 inches by 1 inch deep with
perforations in the same. To each of these I attach a pipe capable of adjustment as to
the distance the oval boxes may be required to be as to proximity to the top or lid.
These pipes pass to the outside of the boxes through the bottom and terminate in a
cone the apex of which is secured to the adjustable pipes. In the base of this cone
I secure, by a cross-bar, a pipe passing upwards about half an inch; to the respective
pipes I connect gas thus forming suitable Bunsen's burners for the purpose and object
of the invention.
On the right hand side of this box is the ordinary reel used in preparing the
mixture, which is prepared in the ordinary way, and finished off on the top of my
improved box or oven before described.
To the top or back part of the box or oven I attach a ventilating pipe to carry away
the spent gases. In the front, for the whole depth, and for nearly the entire width
I have a door to facilitate lighting of the oval burners.
By this means 1 am enabled to bake oat cake with greater rapidity and more
regularity than hitherto.
Dated this 11th do of Anda 1000

page_text: I, WILLIAM DEWHIRST of No. 2 Dove Street, Saltaire in the County of York,
Mechanic 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 certain improvements in apparatus for the baking of
oat-cake with a more uniform heat, and less attention than is required when heated in
the ordinary manner and consists in forming a cast iron box or casing supported
upon suitable legs, the box or casing having a close fitting lid of cast iron: and about
midway within the said box or casing, I attach two oval boxes having perforations
therein, and secure to the same, pipes, capable of adjustment, the said pipes passing
through the bottom of the casing and terminating in cones.
In the base of each cone,
I secure a pipe passing upwards and connect the same with the gas main, thus forming
suitable "Bunsen's" burners and to the back or side of the box or casing, I attach a
ventilating pipe. By these means, I am enabled to bake oat-cake with greater
rapidity and more regularity than hitherto.
In order that my invention may be better understood, I have appended a sheet of
drawings, of which the following is a description, and in which Figure 1 represents a
front view of my apparatus with part of the front broken away. Fig. 2 is a plan of
the same, having part of the lid removed. Fig. 3 is a front view of my apparatus
shewing a modified arrangement of pipes, and Fig. 4 a plan of the same.
The box or casing is indicated by the letter A, and is about five feet long, twenty
inches wide, and six inches deep, made of cast iron supported upon suitable legs B,
the box or casing being covered with a close fitting lid C also of cast iron. Within
the box A and about midway between the bottom and top, I attach two oval boxes or
burners D about sixteen inches by nine inches by one inch deep, and form per-
forations D¹ therein. To each of the oval boxes or burners D, I attach a pipe capable
of adjustment by the nuts N, as to the distance the oval boxes or burners D may be
required from the top or lid C. The said pipes pass to the outside of the box or
casing A, through the bottom, and terminate in a cone F. Below the base of a cone F,
I secure by a cross bar G, a pipe E passing upwards into the interior of the cone in
which gas is mixed with a suitable quantity of air for combustion as it escapes from
jets D on the face of the oval boxes or burners D thereby heating the cover plate C
by the jets from the said burners D.
On the right hand side of my apparatus at R is fixed an ordinary reel used for
distributing the mixture, which is prepared in the ordinary way, and baked on the
top of the box or casing, heated in the manner as before described. To the back
or side of the said box A, I attach a ventilating pipe H for carrying away the spent
gasses and in the front may be formed doors J to facilitate the lighting of the oval
burners.

page_text: In working out my invention, I find I can dispense with the oval boxes D, and
accomplish my object by substituting therefor a series of perforated pipes K secured
in the interior of the box A, the end of each pipe in the interior of the box being
made solid, while the other end is open and attached to a recessed pipe L. To each of
the recessed pipes L is secured a gas regulating tap M having a nozzle N¹ projecting
into the interior of the recess, by which gas on escaping from a nozzle N¹, enters its
respective pipe K, conveying and combining with it a sufficient quantity of air to
cause combustion in the box A as it escapes through the perforations, thus heating
the baking plate or lid C in a similar manner to that before described, and keeping
the same at a more uniform heat with less attention than is the case when coal or
other fuel is employed for heating the same.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :—
An oatcake baking machine in which the top plate C is heated by gas jets placed
inside a box under the said top or cover plate C substantially in the manner shewn
and described.