improvements in and relating to Ovens.
Year: 1894

page_text: Date of Application, 22nd May, 1894-Accepted, 22nd May, 1895
improvements in and relating to Ovens.
I, ALEXANDER ARTHUR ANDERSON 13 Nither Hall Road Doncaster, Oven
Builder and Bakers 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:-
This invention relates to bakers ovens and consists in providing a series of cold
air flues and also providing a means of regulating the air supply to same so that
the bottoms of the ovens are equally heated and the over heating of the bottom of
the lower ovens or oven is reduced to a minimum.
In order that my invention may be fully understood, I annex drawings to which
I now refer :—
Figure 1 is a sectional elevation of the flues of an oven constructed according to
my invention.
Figure 2 is a plan view of the flues of an oven showing the course of the flues.
Figure 3 sectional elevation to enlarged scale through line X Y in Figure 4 of
air regulator.
Figure 4 front elevation of air regulator.
Referring to Figures 1. & 2. the course of the air shown by the arrows.
The
air enters the upper flues p and then passes downwards through a channel n to the
lower flues o whence it passes to the combustion chamber of the furnace situated
about 1, m m are the shafts or openings through which the cold air enters and after
passing through the upper flues descends by means of the shafts or openings n n
to the lower flues. The bottom of the ovens rests upon the top of the upper
flues at r.
Referring to Figures 3 & 4. a is a sliding plate having apertures b which
coincide with apertures e in the outer plate or casing that is to say when the
plate a is in one position the apertures e are open and when in the opposite position
the apertures e' are open, d & d' are two sliding plates which also have apertures c
and c¹ in same; the upper aperture e not being visible owing to the position of
the plate and the direction through which the section is taken, but they are
similar to apertures c.
It will be seen that by moving or operating the plates a, d
and d¹ the amount of air entering by the apertures e & e' can be regulated. The
outer casing and plates a, d & d' are fixed as shown in Figures 1. & 2 so that the
apertures e communicate with the upper flues p and apertures e with the lower
flues o. By regulating the amount of air which enters the upper and lower flues
the heat communicated to the bottom of the oven s or sole plate may be regulated
as the admission and regulation of cold air to the upper and lower flues will cause
the temperature to be more uniform owing to the cooling of the air thereby. By
this arrangement sand beds and air spaces and such like are dispensed with. The
draught or movement of the air in the flues is caused by the flues being connected
to the chimney of the furnace. By the admission of air through the flues a more
perfect combustion of the fuel is obtained as the air may be admitted direct to the
furnace through the lower flues or through the upper flues as desired. The upper
and lower flues are arranged horizontally being formed in the body of the stove or
furnace, the combustion chamber being formed between same. The flues are
simply the ordinary channels which are formed in a bakers oven, being of a
suitable section and running as shown in Figures 1. & 2. and may be formed of
6.1.4

page_text: brick work or other well known and suitable material. The products of com-
bustion pass up a chimney u after having travelled through the flues or channels
aforesaid. The position and size of the flues it will be seen will depend upon the
size of the oven to be heated.
The gratings or perforated plates may be secured in their required positions by
set screws g, 9, & g engaging on bolts h; h¹, & h² attached to the plates a, d & d
respectively, said bolts passing through slots in the outer plate or casing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In ovens of the class herein described the combined construction and arrange-
ment of the same substantially as described and illustrated herein.
E. EATON,
Agent for Applicant.
E. EATON,
Agent for Applicant.