Improvements in Apparatus for Raising Bread.
Year: 1891

page_text: Date of Application, 5th Oct., 1891-Accepted, 7th Nov., 1891
COMPLETE SPECIFICATION.
Improvements in Apparatus for Raising Bread.
I, WILLIAM DAWSON, of Ogontz, in the County of Montgomery, and State of
Pennsylvania, United States of America, Gentleman, 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 accompanying drawings:-
In said drawings
Figure 1 represents a view, in perspective, of the interior of the apparatus ;
Figure 2 a central vertical longitudinal section through the same, and
Figure 3 is a vertical transverse section through the same on the line xx of
Figure 2.
The object of my invention is to provide a cheap, simple and efficient device for
raising bread, so arranged as to be within perfect control and free from the
objections incident to this class of apparatus.
In the drawings A represents the box or exterior casing which is partly divided
by an internal partition B, into two compartments communicating across the top of
said partition. The larger of these compartments is provided with a door C, and
the smaller with a door D, each of which doors preferably has a glass window in
its centre, as indicated at c and d respectively, to permit observation of the interior.
Two holes E E are formed near the top of the partition on either side of its centre
and a series of small holes F is formed in the door D near its bottom.
An overhanging chimney G, with a hood g, is placed centrally over the smaller
compartment, and said chimney is provided with a horizontal pipe H, which
extends across the top of the larger compartment and out through the end thereof,
as shown clearly in Figure 2. The outer end of said pipe is provided with a shield
or open cover I, and with a damper J. In the larger chamber, and adjacent to
that end thereof where the pipe H passes out, is a vertical pipe K, communicating
with the interior of the pipe H, and leading to the bottom of the box where it is
provided with a series of small inlet holes k. An ordinary kerosene lamp L or
other heating device is placed in the smaller compartment with its chimney imme-
diately beneath the hood g. The pan M containing the bread to be raised is placed
in the larger compartment.
The operation of the device is as follows:
The lamp L heats the air in the smaller compartment and although the partition B
protects the bread pan from any direct radiation, a circulation of the heated air is
maintained between the two compartments by means of the open space at the top
of the partition and the holes near the lower part thereof. Fresh air is supplied to
the lamp through the holes F, and the products of combustion pass out through the
chimney G and pipe H. As the moisture is given out by the bread in the act of
raising it is carried off by means of the pipe K, whose inlet holes & being arranged
at the bottom of the box draw off the moist air therefrom and the rapidity of the
circulation through the box is regulated by means of the damper J. The shield I,
prevents any indraught which might cause the lamp to smoke, and the windows c
and d permit the operator to watch, on the one hand, the progress of the raising,
and on the other, the condition of the lamp flame. A thermometer N may,
desired, be inserted in the door C and still further facilitate the ascertainment of
the conditions proper for successful work.

page_text: 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 :-
The combination of an enclosing case, an exterior partition partly dividing the
same into two compartments, a chimney and chimney pipe leading from one of
said compartments to the outer air, a ventilating pipe communicating with said
chimney pipe and arranged in the other of said compartments, and a lamp arranged
beneath said chimney, substantially as set forth.
DL: AL 1
how 1901
CARPMAEL & Co.,
Agents.