Improvements in or relating to Ovens and Apparatus employed in the Manufacture of Wafers and the like.
Year: 1897

page_text: Date of Application, 12th May, 1897-Accepted, 21st Aug., 1897
Improvements in or relating to Ovens and Apparatus employed in
the Manufacture of Wafers and the like.
A communication from DELACRE ET FILS, Manufacturers, of Vilvorde, in the
Kingdom of Belgium.
I, GEORGE SAMUEL BAKER of 58 City Road, in the County of London, and
Willesden Junction in the County of Middlesex, 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 oven forming the subject of this application for patent is preferably constructed
of iron. It can be put up in any place owing to the small space it occupies, and is
economically heated by means of gas and is so arranged that the workman is not
inconvenienced by the heat.
Figure of the accompanying drawings represents a side view of the new
oven.
Figure 2 is a plan view.
Figure 3 is a front view, the wagons carrying the wafer moulds being removed
from the rails.
Figure 4 shows a portion of this view, partly in section and on a larger scale,
shewing two wafer mould carriages in place; one being shown in transverse section
and the other in front view.
Figure 5 represents a longitudinal section of the oven and wafer mould carriages
on a larger scale, as also a side view of a carriage taken out of the oven with the wafer
mould open;
Figure 6 is a back view of the oven;
Figures 7 and 8 show a plan view, and a front view of a wafer mould with its
carriage;
Figure 9 shows the wafer mould open, and
Figure 10 exhibits it edgewise.
The oven as represented in the drawing as an example is arranged for six wafer
moulds. It consists of four frames or uprights a of cast iron, Figures 1, 2 and 3,
placed and kept at a distance by cross pieces, so as to form three sections 1, 2, 3..
Each frame is provided with two sets of flanges b 61 on which the rails C are placed
and upon which run the wafer mould carriages d Figure 4. Above and below each
wafer mould are placed in sets of four, or more or less, heating tubes e, which after
having traversed the rear wall of the oven, pass in a straight line towards the front
of the oven, where they are kept in position by the guard plates f. The heating tubes
are provided with air injectors g, and taps h, and are jointed by means of tubes i to a
gas inlet k. In the interior of the oven, they are pierced with one or several sets of
holes, through which the heating gas escapes.
A chimney ascends from the upper part of each section of the oven and conducts
the burnt gas outside.
The uprights a have such a form as to constitute not only the framework of the

page_text: oven or furnace properly speaking but also a lower platform supporting the rails
which extend beyond the oven and thus enables the wafer inoulds to be taken out of
the oven and all the necessary operations carried out. (see Figure 5).
Part of the uprights formning the oven is covered with two thicknesses of cloth filled
inside with clay or other non-conducting material. A door or doors in the back part
of the oven (see Figure 6) give access to a heated part which can be used as a stove
or drying cupboard.
The wafer mould carriage is of a particular construction enabling the wafer mould to
be worked, closed, returned, pnt into and taken out of the oven with the greatest ease,
as well as to be replaced instantly by other wafer moulds according to the form of
wafers wished to be obtained.
The carriage is composed of a frame m Figures 7 and 8 carried on four wheels and
having in front and behind two open bearings n n' in which rest the pivots o o¹ of
the wafer mould. This consists of two plates ppl united by hinges ¹. The
pivots o o¹ are two halves one being fixed to or forming part of the upper part and the
other to the lower part of the wafer mould.
2.1
At the front, each half of the pivot terminates in an ear or lug and 71 respectively,
to which, are fastened the two closing levers s and s¹, whilst the carriage is provided
opposite said levers 8 s' with two projections or latches tt, into which the levers are
pushed to close and keep together the two parts of wafer mould. The arrangement
of this closing is symmetrical so that in returning the wafer mould to its horizontal
position either lever can take the place of the other and so permits the closing of the
wafer mould, whichever side may be turned uppermost.
The inside surfaces of the wafer mould Figure 9 can have any moulds or designs
whatever according to the shape to be given to the wafers.
It is evident that the oven can be arranged for any number of wafer moulds by
increasing the number of uprights a and consequently the sections of the oven.
These uprights can be in the form of frames or partitions, or frames furnished with a
sheet iron casing. Then the number of rails or ways can be increased as
required for each section.
In order to get a better distribution of heat the top and bottom of each wafer can
be provided with metallic cloth simply screwed on and rendered non-conducting as
needed.
The wafer moulds being much larger than those hitherto made, that is to say,
larger than the sheet to be made, it follows that all the contents become properly
baked, whilst formerly from the Gaufre iron issued a paste or thick pudding only fit
to be thrown away.
When the oven is to be publicly worked in a shop it can be ornamented according
to circumstances to conceal the pipes and chimney.
By the side of the oven a sheet iron platform x can be fixed, Figures 2 and 3, or a
table could be placed to hold the necessary utensils.
Having now particularly described and ascertained the nature of this said invention
as communicated to me by my foreign correspondent, and in what manner the same
is to be performed, I declare that what I claim is :-
1. An oven for wafers or the like consisting of a box or chamber having a series of
partition walls each provided with one or more sets of rails projecting beyond the oven
and resting on the uprights or frames and serving as a track for the carriages of
the wafer moulds in combination with heating tubes provided with air injectors
and taps connected with a gas inlet, the entrance to the oven being closed by
plates so formed as to admit only the carriages of the wafer moulds and at the
same time support the heating tubes at their extreme ends, substantially as
described.
2. The construction of an oven for wafers or the like by means of a set of
frames provided at different heights with lateral flanges carrying the rails for the
wafer mould carriages, the frames forming the body of the oven at their rear part
which is provided with a casing of double sheet iron filled in with any suitable non-

page_text: conducting material whilst their front part supports the rails projecting beyond the
oven substantially as described.
3. A carriage for wafer and similar moulds consisting of a horizontal frame
mounted on four wheels and having in its longitudinal axis two open bearings for
the pivots of the wafer mould, substantially as described.
4. A mould for wafers and the like consisting of two mould plates united by
hinges and each provided with an extension at each extremity of its longitudinal
axis so as to form half of the pivots upon which the mould rests in the carriage,
substantially as described.
5. A locking device for wafer and similar moulds consisting of two levers or bolts
symmetrically fixed to the wafer moulds in combination with two catches on the
carriage adjacent to the said levers substantially as described.
6. The combination and arrangement of parts constituting the complete oven for
use in the baking of wafers and the like substantially as described and illustrated
in the accompanying drawings.
7. The combination and arrangement of parts constituting the complete wafer-
mould-carriage substantially as described and illustrated in Figures 7 and 8 of the
accompanying drawings.
8. The combination and arrangements of parts constituting the complete
wafer-mould substantially as described and illustrated in Figures 9 and 10 of the
accompanying drawings.
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1100k
BOULT & WADE,
Agents for the Applicant.