Year: 1895

page_text: Date of Application, 13th Feb., 1895-Accepted, 30th Mar., 1895
I, JOHAN LUDWIG WALDEMAR OLSEN of St. Strandstræde 10, Copenhagen,
in the Kingdom of Denmark, Baker to the Royal Court, 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 present invention relates to improvements in bakers' ovens and consists in
the combination with the oven of a special heat accumulator and flue enveloping both
oven and accumulator and through which envelope can flow a constant hot draught
from the base of the oven back to the same base again, so that the process of
baking can be proceeded with without interruption. The details of the construction
and arrangement by which the objects of the present invention are attained, are
illustrated in the accompanying sheet of drawings which are to be taken as part of
this Specification and read therewith.
Figure 1 is a longitudinal sectional elevation of an installation of ovens.
Figure 2 is a transverse sectional elevation of a single fire installation of ovens.
Figure 3 is a transverse sectional elevation of a double fire installation.
a, a are the fireplaces. They are of suitable capacity and are adapted to receive
a considerable supply of fuel. They may be fixed at either end of the installation.
They are drawn as for coke or coal but may be constructed for gas, and in any
case may be made of any suitable material. The products of combustion are
delivered directly into a wide flat flue which delivers into vertical flues distributed
throughout a heat accumulator e. The latter is a mass of compacted refractory
material. Other flues b, b lead from the vertical flues above mentioned, under each
oven d and over the one below it, up and along the sides of the installation outside
the ovens d, d, over and along the top of the upper one of the installations, down
behind them all and under the floor of the combustion chamber to the chimney c.
The number of separate ovens d, d does not form any part of the present invention.
Whatever their number, they are always enclosed by an envelope of hot air
Blue b, b over and along the sides, top and bottom of them considered as one
installation. f,fare supports for the flat bottoms of the ovens.
Seeing that the flues of the last mentioned arrangement constituting an envelope
of the installation, are of considerable dimensions and free from any interruptions
other than the necessary supporting pieces, they allow of the ovens being heated
very quickly and regularly. The fire place or places can be constructed with a
view to an exact regulation of the rate of combustion and the process of baking
can be a continuous one from start to finish even during the time of any stoking.
Inasmuch as the products of combustion cannot get into any of the ovens d, any
kind of combustible may be used and a high degree of cleanliness be maintained.
As the figures clearly indicate, the fire place is set under the installation of ovens.
The draught also starts from and terminates underneath it, while the flames and
the hot gases flow under the accumulator and all over and about the ovens, between
them, up the outside of them, and down at the back of them all, and lastly through a
flue under the combustion chamber, to the chimney. The consequence is that
stoking being attended to, the fire place doors closed, and the flues air tight, no
heat will be lost, the internal temperature remaining constant in the flues over the
ovens, much to the benefit of these latter.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and the manner in which the same is to be performed, I declare that what I
claim is :-
The above described combination with the oven or ovens, of an accumulator
interposed between the oven installation and the source or sources of heat, and the
arrangement of flues interspacing the several ovens and constituting an envelope of
the oven installation and combustion chamber, the said arrangement starting from
the base of the installation and returning thereto, as set forth.
Dated this 13th day of February 1895.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.