Year: 1887

page_text: I CHARLES CHRISTIAN CLAUSEN of 280 Broadway in the City, County and State
of New York United States of America Brewer, 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 :-
In the malt kilns in general use the malt is dried by the hot air which passes
with the gases of combustion through the malt on the kiln floors.
When the fires in the furnaces are raked up, preparatory to charging the furnaces
with additional fuel, the ashes and cinders are carried along with the hot air, and
are retained in the moist malt, they together with the sulphurous fumes and smoke
forming an objectionable admixture to the malt.
This invention is intended to so improve the furnaces of malt kilns that the
passage of ashes and cinders to the kiln floors is prevented when the fire is raked
up, and that the ashes and cinders are conducted through auxiliary flues to the
chimney, and the invention consists of a furnace for malt kilns the shaft or flues of
which are provided at the upper part with a damper (or dampers) operated by a
lever and chains a lateral conducting flue below said damper, which flue is closed by
a hinged gate that is connected to the damper by chains in such a manner that when
the damper is closed,, the gate open and vice versa.
In the accompanying drawings Fig. 1. represents a front elevation with a part
broken away of my improved furnace for malt kilns. Fig. 2. is a vertical trans-
verse section through the furnace and Fig. 3. is a horizontal section or plan on
line ---Fig. 1.
Similar letters of reference indicate corresponding parts.
Referring to the drawings A represents the fireplace of my improved furnace for
malt kilns which furnaces are preferably arranged in pairs, the rear parts of which
abut against a common partition wall as shewn in Fig. 3.
The furnaces are separated from each other by intermediate air-spaces a between
the side walls of the furnaces, so as to utilize the heat of said walls for heating the
air that rises in said air-spaces and is then conducted to the kiln floors. The same
air-spaces are arranged alongside of the outer walls of the furnaces as is customary
in furnaces of this class. The air supplied to the furnaces and the separating spaces
is heated by the fire in the fireplaces and conducted with the products of combustion
to the kiln floors located above the said furnaces. A hood B of non-combustible
material is supported above the upper part of the furnaces and serves as a deflector
for the heated air and gases of combustion so that they are distributed in an uniform
manner to the kiln floors.
In the upper part of the shaft of each furnace is arranged a damper which rests
when in horizontal position on a side strip or ledge d at one side wall of the furnace.

page_text: One pivot of the damper C is extended through the front wall of the furnace and
provided with a lever é that is located in the same plane with the damper and provided
at both ends, equi-distantly from the pivot, with pending chains ff by which the
damper can be readily set into vertical or horizontal position as required. Below
the damper is arranged in each furnace a lateral auxiliary flue D which communicates
with a main flue D¹ that leads to a chimney.
All the lateral flues of a group of furnaces communicate with the same main flue D¹
as shown in Fig. 3. Each lateral flue is closed by a drop gate or valve E which is
hinged to the wall of the furnace above the flue D the lower end of said gate being
connected by a chain g or other means to one end of the damper C as shewn clearly
in Figs. 1 and 2.
When the fire in the furnace is in its normal condition the damper C is set into
vertical position as shewn in Fig. 1. in which position the gate of the lateral flue D is
dropped so as to close the latter and permit thereby the hot air and products of com-
bustion to pass unobstructed in up ward direction and thence to the kiln floors as
indicated by arrows in Fig. 1. Whenever the fire is to be raked up, preparatory to
supplying the same with new fuel the damper is first closed and thereby the drop
gate E automatically raised as shewn in Fig. so that the hot air and products of
combustion pass together with the ashes and cinders through the lateral flue and main
flue to the chimney as indicated by arrows in Fig. 2. When the fire has been
supplied with new fuel the damper C is replaced in vertical position again and the
auxiliary flue closed whereby the furnace is restored to its normal condition.
The auxiliary flues, gates and dampers may also be used in connection with the
usual flues by which the gases of combustion are drawn from the fireplaces of malt
kilns as I do not desire to confine myself to the application of the same to a shaft
above the furnace of the kiln.
The advantages of my auxiliary flues, gates and dampers are that malt of a superior
quality is obtained as it is not deteriorated by the admixture of smoke, sulphurous
gases, ashes and cinders and that the danger of fire to malt kilns is greatly
diminished.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is.
First. The combination, in a furnace for malt kilns, with the shafts or flues of the
same, of dampers at the upper parts of the same, means for setting the dampers,
lateral flues below said dampers, a main flue communicating with said lateral flues,
hinged drop-gates or valves for said lateral flues, and means connecting said gates
with the dampers, whereby the flues are closed when the dampers are opened, and
opened when the dampers are closed substantially as set forth.
Secondly. In a furnace for malt kilns, the combination of the shafts or flues of the
sanie, centrally-pivoted dampers arranged at the upper parts of the same, means for
operating said dampers, a damper supporting ledge at one side-wall of the shafts or
flues, lateral flues below said dampers, a main flue communicating with said lateral
flues, hinged drop gates or valves adapted to close said lateral flues and chains
connecting the drop-gates with the opposite end of the dampers, substantially as shewn
and described.
1
1007
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.