Improvements in connection to apply to bakers, confectioners and japanner's ovens, also to heating apparati
Year: 1897

page_text: DONALD GORDON, Bakery Engineer, 21, Glebe Buildings, Stoke-on-Trent, and
THOMAS MCMAIN, Oven Builder, 49, Queen Street, Longport, Staffordshire, do
hereby declare the nature of this invention to be as follows:-
Improvements in connection to apply to bakers, confectioners and japanner's
ovens, also to heating apparati such as are termed cooking or baking ovens, that is
to say that a special shaped brick made of fire clay clay or stone made in different
sizes with one end and one side tongued, the other end and side grooved so as to
allow them to fix in one another on a bed of cement, mortar, or other materia!,
the whole to be tied with iron or other material of metal grooved frames to fit
the said brick, the outside wall and inside wall of oven to be built independently
of each other and both walls to be of single brick in thickness not less than 1 inch
cach wall, there will be a cavity of not less than inches in between said walls
filled in with slag wool or some other nonconducting material, the oven will have
every advantage of an oven with 18 inch or 2 ft. wall, this oven having two walls
and packing in all a thickness from 8 inches possesses all the advantages of an
ordinary oven and saves space and can be erected as a fixture or portable oven.
Dated this 30th day of April 1897.
DONALD GORDON,
THOMAS MCMAIN.
We, DONALD GORDON, of 21, Glebe Buildings, Stoke-on-Trent, Bakery Engineer,
and THOMAS MCMAIN, of 49, Queen Street, Longport, in the County of Stafford,
Oven Builder, 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 reference being had to the drawings forming part of
this specification and to the several figures and letters illustrated therein:
Our invention is in connection with and applies to bakers, confectioners and

page_text: japanners ovens and also to heating apparati such as are termed cooking or
baking ovens and our improvements consist in the method of constructing the
same.
Figure 1. represents in perspective sectional elevation one of our improved
ovens.
Figure 2. represents a part plan shewing the walls constructed according to
our invention.
Figure 3. is a sectional view through same at A and Figure 4 is a view of an
improved form of brick we employ in building the said oven.
Figures 5 & 6 shew another form of brick we employ.
In carrying our improvements into practical effect, we use a special kind and
shape of brick A which may be glazed, made of fire clay, clay or stone which may
be of any required size, one end of the brick A is tongued as at B and the other
end.is grooved as at C so as to allow the respective bricks to fix in one to the
other the tongue B being received in the groove C in each brick or the bricks may
be formed with a V groove C¹ at each end the cement or mortar keying the
bricks together, in this case obviously no tongue is employed as previously
described, the walls are built up on a bed of cement, mortar, or other suitable
material, the whole being tied in with iron or other material forming grooved
frames D which receive the said bricks of which the walls of the oven are com-
posed, the outside wall E and the inside wall F of the oven are built inde-
pendently of each other, both being of single brick in thickness 2 inches by
preference (more or less) in each wall. A cavity G is formed between the walls,
of 3 or 4 inches wide which cavity is filled in with slag wool asbestos or other
approved non-heat conducting material so as to provide a packing. The top of
the oven is or may be constructed of iron sheets and covered over with slag wool.
By the herein described improved construction of ovens many advantages will
be found to exist as whilst possessing all the advantages of ordinary ovens con-
siderable space is saved and they can be erected as a permanent fixture or as port-
able ovens.
The special form of bricks we use by reason of being tongued and grooved, or
grooved only they bind each other being tied in with the ironwork framing and
which ensures steam tight baking chambers and at the same time the stability
of the walls so constructed will be found equal to the ordinary solid two feet walls
and contain heat equally as well. Furthermore the weight of the oven is con-
siderably reduced so that it can be erected upstairs or on any ordinary floor. And
finally, by our method of having brickwork inside and quarries for soles the oven
contains all the advantages of solid brick ovens and there is a solid and equal
<listribution of heat throughout which is an all important feature.
We may add that the oven is supplied and heated by steam or hot air or any
other principle applying to baking ovens.
We do not confine ourselves to the more precise details of formation and con
struction herein set forth, as we may effect modifications without departing from
the essential features of this our invention, but-
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:-
Firstly. The herein described special construction of bakers, confectioners and
japanners ovens and the means for carrying the same into effect substantially in
manner and for the purpose set forth.
Secondly. In baking ovens the special formation of tongued and grooved bricks
(and) or bricks grooved at each end and the use of such bricks for building up
the walls of said ovens, said walls consisting of an inner and outer wall having
a cavity between same, packing said cavity with non-conducting material all in
combination for the purpose substantially as described.
Thirdly. In baking ovens and similar ovens building up said walls in an iron.

page_text: or other suitable frame constructed and arranged to receive the tongued and
grooved bricks forming said walls in combination therewith for the purpose of
tieing in the structure in manner herein described.
Dated this 31st day of January 1898.
EDWD. J. PAYNE & SON,
Warwick Chambers, 104, Colmore Row, Birmingham,
Patent Agents for the Applicants.