Improvements in Puddling and Heating Furnaces.
Year: 1890

page_text: Date of Application, 31st Mar., 1890
Complete Specification Left, 19th Dec., 1890-Accepted, 21st Feb., 1891
PROVISIONAL SPECIFICATION.
[Communicated from abroad by LEVI DEE YORK, of Portsmouth, County of
Scioto and State of Ohio, United States of America, Manufacturer.]
Improvements in Puddling and Heating Furnaces.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent
Agents, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
My invention relates to puddling furnaces, the object of the invention being to
provide a greater concentration of heat by forming combustion in the hearth of the
furnace through the admission of air over the top of the bridge after circulating
around a fire chamber several times.
In carrying out my invention I provide a series of connecting air passages or
ducts within the walls of the fire chamber, and to a better understanding of my
invention I will describe a puddling furnace embodying it.
The furnace may be of the ordinary construction and combined with an ordinary
chimney. The puddling chamber of the furnace may be constructed in any desired
manner and have communication with the chimney through a throat. The fire
chamber will be arranged at one side of the puddling chamber and its grate may
be approximately on a level with the hearth in the puddling chamber.
The fire chamber is open so that the fire therefrom may communicate with the
puddling chamber through a passage over the bridge wall.
Air passages are formed within the wall surrounding the fire chamber. They
extend the whole length of the side walls of the fire chamber and across 'the rear
wall excepting where this is interrupted by a passage and opening through which
air enters to the passage and also surround the front wall except where this wall is
interrupted by the passage through which the products of combustion pass over the
bridge wall.
Air enters the lowest passage on each side of the opening in the rear
wall, and, after traversing the lower passage to a point opposite the bridge wall, it
returns by the next upper passage to the rear wall of the furnace, then traverses
the next upper passage and finally escapes above the bridge wall in a highly
heated condition, mingling there with the products of combustion 'from the fire
chamber.
In this construction atmospheric air is carried around the 'fire chamber and
discharges into the puddling chamber with the gas from the fire chamber, thus
forming a perfect combustion.
If desired, a blast may be applied to the air passages and it is evident that this
arrangement of air passages may be employed in a heating furnace.
Dated this 31st day of March 1890
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Puddling and Heating Furnaces.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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 :-
My invention relates to puddling furnaces, the object of the invention being to
provide a greater concentration of heat by forming combustion in the hearth of the
877

page_text: furnace through the admission of air over the top of the bridge after circulating
around a fire chamber several times.
In carrying out my invention I provide a series of connecting air passages or
ducts within the walls of the fire chamber, and to a better understanding of my
invention I will describe a puddling furnace embodying it.
The furnace may be of the ordinary construction and combined with an ordinary
chimney. The puddling chamber of the furnace may be constructed in any desired
manner and have communication with the chimney through a throat. The fire
chamber will be arranged at one side of the puddling chamber and its grate may
be approximately on a level with the hearth in the puddling chamber.
The fire chamber is open so that the fire therefrom may communicate with the
puddling chamber through a passage over the bridge wall.
Air passages are formed within the wall surrounding the fire chamber. They
extend the whole length of the side walls of the fire chamber and across the rear
wall excepting where this is interrupted by a passage and opening through which
air enters to the passage and also surround the front wall except where this wall is
interrupted by the passage through which the products of combustion pass over the
bridge wall. Air enters the lowest passage on each side of the opening in the rear
wall, and, after traversing the lower passage to a point opposite the bridge wall, it
returns by the next upper passage to the rear wall of the furnace, then traverses
the next upper passage and finally escapes above the bridge wall in a highly
heated condition, mingling there with the products of combustion from the fire
chamber.
In this construction atmospheric air is carried around the fire chamber and dis-
charges into the puddling chamber with the gas from the fire chamber, thus forming
a perfect combustion.
If desired, a blast may be applied to the air passages and it is evident that this
arrangement of air passages may be employed in a heating furnace.
In the drawing,
Figure 1 is a side elevation of a puddling furnace embodying my improvement.
Figure 2 is a top or plan view thereof.
Figure 3 is a front elevation and Figure 4 is a longitudinal vertical section
through the line xx of Figure 2.
Similar letters of reference designate corresponding parts in all the figures.
Referring by letter to the drawing, A designates the roof, A' the side and end
walls thereof and A2 the chimney.
The roof A and walls A¹ may be of plate metal bolted together in the usual
manner and provided with the usual fire brick lining a. The chimney is of the
unusual construction having the corner plates a¹ and the tie-rods a².
B designates the puddling chamber having the hearth B' constructed on a
metal plate 6 which is supported upon girders having their ends seated in the
furnace walls.
B2 is the door covering the stock hole of the puddling chamber sliding in ways
on a wall A¹ and 63 is the stopper hole. An air or water space & may be provided
around the hearth.
C designates a fire chamber having a grate C₁ approximately on a level with
the hearth B₁ and supported on girders c above an ash pít B³. This fire
chamber opens at its upper portion into the puddling chamber, so that the fire
therefrom may communicate with the chamber B through the passage c¹ under-
neath the roof of the furnace.
CCC designate horizontal air passages or sections within the wall surrounding
the fire chamber. The passages do not extend entirely around the fire chamber,
but as shown in Figure 4, the passages C2 C3 of opposite sides are separated at one
side or front of the fire chamber by the wall of the bridge C or, in other words,
the passages form two sets of zigzag air ducts one at each side of the fire chamber
and partially across the ends as shown in dotted line in Figure 2.
Atmospheric air enters the lower passages C2 through ducts 2 through the back

page_text: of the furnace, and thence passes up through gates to the passages C³, thence up
through the gates c to the passages C, out through a restricted passage formed
by the vertical walls at the sides of the bridge C, where it enters the
puddling chamber with the gas from the fire chamber thus forming a perfect
combustion.
The products of combustion pass from the puddling furnace through the throat d
to the chimney.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent I declare that what I claim, is:
In a furnace, the combination with a fire chamber opening at its top into a
puddling chamber, of two sets of air ducts having an inlet for air through the rear
wall of the furnace, each of said ducts consisting of several sections arranged
horizontally in the side and end walls of the fire chamber, the lowest section of
each set of ducts communicating at one end with the section next above it, the last
named sections communicating at the opposite end with the upper sections and the
said upper sections having an outlet for heated air into a restricted passage formed
by the vertical walls at the sides of the bridge where said air mixes with the gas
from the fire chamber, substantially as specified.
Dated this 19th day of December 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.