Improvements in Furnaces.
Year: 1899

page_text: Date of Application, 25th Aug., 1899-Accepted, 10th Mar., 1900
COMPLETE SPECIFICATION.
Improvements in Furnaces.
I, HENRY PAHAUT, of Touilb, Haute Garonne, in the Republic of France,
Works Manager, 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 subject of the present invention consists in a multiple furnace with quad-
ruple reverberation, intended for sheet iron or metal plate and other metal-
lurgical works, characterized by a complete utilization of the caloric, a consider-
able economy in the manipulation, and a great facility and expedition of cleaning,
and which are capable of working either with a natural draught or
draught.
a forced
And in order that my invention may be thoroughly understood, I now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a vertical section through the furnace following a plane passing
through its longitudinal axis.
Fig. 2, is a horizontal longitudinal section.
Fig. 3, is a view partly in vertical transverse section on the plane or line a a,
of Fig. 1.
Fig. 4, is a detail view shewing the manipulation of the movable grating or
fire bars of the furnace.
Fig. 5, shows gratings or fire bars for keeping or retaining the incandescent
combustible during cleaning.
Fig. 6, is a vertical transverse section of the furnace following a plane or
line Y,Y, of Fig. 1.
The furnace is constructed or built upon a thick layer of concrete on a level
with the floor of the iron works. It comprises a furnace, or combustion cham-
ber, A, a furnace in which iron and steel can be welded, a furnace for reheating
preparations or largets, (pieces of bar-iron or blanks, to form the sheets), a furnace
for reheating the sheet-iron or metal plate, a furnace for annealing the sheet-
iron or metal plate, in closed vessels, or receptacles, and lastly a chamber for
reheating the air intended for the combustion of the furnace.
The furnace combustion chamber is fitted with a special grating composed of
two parts, each of which is composed of bars fixed upon two transverse pieces or
bearers L, L, which have their ends perforated to receive a shaft or spindle Mi
upon which they are keyed. At the extremity of each of the shafts or spindles M
is keyed a lever N carrying a counterweight 0. Each of the shafts or spindles Mis
supported by two bearings P in which it is free to rotate in such a manner
as to permit, for the cleaning out of the grate, of the two parts of which it is
composed being swung or rocked, in order to cause the clinkers to fall into the
ash-pit. In order to maintain or return the combustible or incandescent fuel
during the cleaning operation, the furnace or combustion chamber is provided
in its front face or wall with apertures formed above the grating, through which
shovels can be inserted into the furnace (Figs. 1, and 5.).

page_text: The above described arrangement admits of the cleaning out of the grate being
effected with facility and dispatch.
The furnace or combustion chamber is fed by hot air, and for this purpose
the ash-pit is closed at its front end. The heated air, arrives through the rear
wall as will be described in the course of the specification.
A lateral or side door D₁ allows of combustible or fuel being fed to the grating.
The flame produced in the furnace or combustion chamber passing over the
bridge or. cheek Q spreads itself in a reverberatory furnace B, which is arranged
to follow the combustion chamber or first furnace. This furnace forms a welding
furnace so called because it can be used to weld iron and steel; it possesses two
working openings F1 F1: At the rear end of this furnace are provided two small
bridges or cheeks Q¹ and Q placed at a relatively short interval apart the one
from the other, and forming between them a space serving as a reheating furnace
for preparations or largets. This furnace is provided with a lateral or side door
for the charging into or discharging therefrom of the largets.
Behind the gridge or cheek Q is arranged a sole plate furnace D which forms
the furnace for the reheating of the sheet-iron or metal plate. At the extremity
of this latter is located the rear wall of the furnace which is provided with a
large opening for the charging into the said furnace or the discharge therefrom
of the sheet-iron or metal plate, which aperture or opening is closed during work-
ing by a register or door R capable of being operated by means of a stem r and
of a balance lever S, the latter end of which is capable of being worked by a rod
with a handle s.
At the end of the sole or bottom of the furnace D is formed an opening T
through which the flame after having traversed the said furnace D, passes to
the fourth furnace situated below the sole or bottom of the said furnace D, and
receiving the case J containing the sheet iron or metal plates intended to be
annealed in a closed vessel or receptacle. This case J is placed upon rollers,
which arrangement admits of its being introduced into the furnace and of its
being withdrawn therefrom through an aperture formed in the lower part of the
rear wall of the furnace and which aperture is closed by a movable plate V
At the front end of the furnace E is formed in the refractory brick work or
masonry a passage W through which the consumed gases escape to the chimney F
Beneath the sole or bottom of the aforesaid welding furnace is provided, in the
thickness of the masonry, a chamber G which serves to heat the air intended for
use in the furnace or combustion chamber for purposes of combustion. This air
is delivered through the tuyere A¹ being drawn by the chimney draught, in the
case of a natural draught, or else by means of an exhaust fan or blower of any
suitable description, in the case of a forced draught, and it spreads itself in the
chamber G where it becomes warmed by reason of contact with the walls, and
passes to the ash-pit of the furnace or combustion chamber through an opening
or aperture B fitted with a register plate or damper C which admits of the
admission of air to the grate bars being regulated at will.
The furnace constructed in the manner hereinabove described, possesses, as is
the case with ordinary furnaces, plates or stays connected together by tie rods or
bars so as to consolidate and strengthen the whole apparatus.
The furnace can be worked either with quadruple or
is to say either with or without the welding furnace, that is to say the furnace in
triple reverberation, that
which iron and steel may be welded and which can be heated to a temperature
sufficient to fuse these metals.
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
-
1. A multiple furnace having quadruple reverberation comprising the welding
furnace herein before described a furnace for reheating the largets, a furnace for

page_text: reheating the sheet iron or metal plates, a furnace for annealing the sheet iron
or metal plates in a closed vessel or receptacle, and a chamber for heating the air
intended for supporting combustion; the furnaces for welding iron and steel and
for reheating being arranged the one following the other, and the furnace for
annealing the sheet-iron or metal plates in a closed vessel or receptacle being
situated beneath the furnace for reheating the sheet iron or metal plates, the
flame after having traversed the three upper furnaces, passing into the lower furnaco
in order to pass to the chimney through a central passage or way, and the chamber
for heating the air intended for supporting combustion being located beneath the
sole or bottom of the iron and steel fusing, or welding furnace, the air being
delivered thereto by a tuyere, either by a natural draught, or by a forced draught,
and passing to the grating of the ash pit, traversing on its way a passage fitted
with a regulating plate or damper.
2. In a multiple furnace such as that claimed in the first claim, a furnace or
combustion chamber characterised by a grating formed in two parts capable of
swinging or rocking in such a manner as to insure the easy and rapid cleaning
thereof, the combustible or fuel being retained by special shovels which are intro-
duced above the grating through holes or apertures formed in the front face of
the furnace or combustion chamber.
3. In a multiple furnace such as that claimed in the first claim, the access
holes or apertures closed by register plates or doors, provided in the rear wall of
the furnace, for the use of the furnace for reheating the sheet-iron or metal plates,
and of the furnace for annealing the sheet iron or metal plates in a closed vessel
or receptacle, substantially as hereinabove described and illustrated in the annexed
drawing.
Hated this 5th day of Anomat 1800
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.