IMPROVEMENTS IN MELTING CALDRONS FOR ASPHALTE
Year: 1884

page_text: I, BRIERLEY DENHAM HEALEY, of Brighouse, in the County of York, Civil
Engineer, do hereby declare the nature of my invention for IMPROVEMENTS IN
MELTING CALDRONS FOR ASPHALTE to be as follows:-
Heretofore I have constructed pans or caldrons for melting pitch asphalte and
similar compounds in connection with tar creosote and like products, in accordance
with the Specifications of patents granted to me, namely No. 2733. A.D. 1876,
No. 4297. A.D. 1881, and No. 3783. A.D. 1882. In all the arrangements shewn or
referred to in the said Specifications the heat of the central flue has acted too much
on the flue itself without giving that maximum of heat to the lower part of the pan
bottom which under my present invention I am enable to obtain.
According to my invention I now construct the arched part of the central flue for
the length of the firegrate only or a few inches longer, and outside of this I form a
main central heating flue the upper part of which is the pan bottom and the sides
of which are made of fire clay slabs which are held in position by trough irons.
The latter are secured to the casing and pan bottom and allow of the slabs being
withdrawn or inserted from the back end of the casing the end plate being made
moveable. The heat from firegrate passes through openings in arched flue at sides
and back and thence along the main central flue acting upon a wide surface of the
pan bottom. On reaching the back end of large sized caldrons the heated gases
pass right and left into the side flues and meet again in the front outlet flue, but in
the small sized caldrons the heat from arched flue issues into the side flues and
escapes by an outlet at the back end.
The side joints of pan with casing are each formed of two angle irons turned
outwards, the upper angle being riveted to pan and stopped at each end against the
overflow and end seat troughs, and the lower angle to top edge of casing having
stay bolts at ends in bottom of end seat troughs. The end joints of pan with casing
being of trough section with one flange riveted to pan and the other flange secured
to the top edge of casing by bolts, are utilised as overflow channels over which are
two outlets at back end with internal lips bolted to the pan end.
The bogie is on a swivel plate without springs but the trailing wheels have
springs of sufficient strength to tilt the front end of caldron as the contents of the
pan are withdrawn, so that very little sediment is liable to be left in the pan and
incrustation of the pan bottom is greatly reduced. The springs rest in cast sockets

page_text: having a suitable pin in one of each pair the other end being free for compensation
as springs are deflected. Loose sockets are passed upon the bogie axle from each
end before the wheels are put on, which have large eyes in them for hooking on the
moveable shafts and they are fixed just behind each bogie wheel.
Another part of this invention comprises arrangements for preventing rain water
from getting into the pan. The side angles at top of pan are put outside and about
half an inch below edge of plates, the top sheets having a flat bar under each edge
through which they are fixed by bolts to said side angles. The end angles at top
of pan are put inside and level with edge of plates, the top sheets having a flat bar.
or angle bar over each end through which they are secured by thumb screws to said
end angles. The rain water therefore falls from the edges of pan covers or from the
lowest edge when one edge is higher than the other.
The form of the inner pan may be as shewn in any of the specifications herein
referred to, or it may take an elliptic form in transverse section below the line of
casing seats. The main damper is so arranged that no heat can pass by it from the
lower flue in front when it is only half open.
In combination with any of my present improvements I use pipes for conveying
the noxious gases from the pan to the firegrate where they are decomposed. These
pipes lead from trunks on the top of pan in which are suitable slides for safety in
working. They pass outside the caldron somewhat as indicated in the specification
of my said patent No. 3783. A.D. 1882.
f Tanna 1001
I, BRIERLEY DENHAM HEALEY, of Brighouse in the County of York, Civil
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
MELTING CALDRONS FOR ASPHALTE and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:—
Heretofore I have constructed pans or caldrons for melting pitch asphalte and
similar compounds in connection with tar creosote and like products, in accordance
with the specifications of patents granted to me, namely No. 2733. A.D. 1876,
No. 4297, A.D. 1881, and No. 3783. A.D. 1882. In all the arrangements shewn or
referred to in the said specifications the heat of the central flue has acted too much
on the flue itself without giving that maximum of heat to the lower part of the pan
bottom which under my present invention I am enabled to obtain.
According to my invention I now construct the arched part of the central flue.
for the length of the firegrate only or a few inches longer aud outside of this I form
a main central heating flue the upper part of which is the pan bottom and the sides
of which are made of fireclay slabs which are held in position by trough irons.
The latter are secured to the casing and pan bottom and allow of the slabs being
withdrawn or inserted from the back end of the casing the end plate being made
moveable. The heat from firegrate passes through openings in arched flue at sides

page_text: and back and thence along the main central flue acting upon a wide surface of the
pan bottom. On reaching the back end of large sized caldrons the heated gases
pass right and left into the side flues and meet again in the front outlet flue, but in
the small sized caldrons the heat from arched flue issues into the side flues and
escapes by an outlet at the back end.
The side joints of pan with casing are each formed of two angle irons turned
outwards, the upper angle being rivetted to pan and stopped at each end against
the end seat troughs and the lower angle rivetted to top edge of casing and bolted
to bottom of end seat troughs. The end joints of pan with casing being of trough
section with one flange rivetted to pan and the other flange secured to the top edge
of casing by bolts are utilised as overflow channels over which are two outlets at
back end with internal lips bolted to the pan end.
The bogie is on a swivel plate without springs but the trailing wheels have springs
of sufficient strength to tilt the front end of caldron as the contents of the pan
are withdrawn, so that very little sediment is liable to be left in the pan and
incrustation of the pan bottom is greatly reduced. The springs rest in cast sockets
having a suitable pin in one of each pair the other end being free to allow for
compensation as the springs are.deflected. Loose sockets are passed upon the bogie
axle from each end before the wheels are put on, which have large eyes in them for
hooking on the moveable shafts and they are fixed just behind each bogie wheel.
Another part of this invention comprises arrangements for preventing rain water
from getting into the pan. The side angles at top of pan are put outside and about
half an inch below edge of plates, the top sheets having a flat bar under each edge
through which they are fixed by bolts to said side angles. The end angles at top of
pan are put inside and level with the edge of plates, the top sheets having a flat bar
or angle bar over each end through which they are secured by thumbscrews to said,
end angles. The rain water therefore falls from the edges of pan covers or from
the lowest edge when one edge is higher than the other.
The form of the inner pan may be as shewn in any of the specifications herein
referred to, or it may take an elliptic form in transverse section below the line of
casing seats. The main damper is so arranged that no heat can pass by it from the
lower flue in front when it is only half open the regulator being formed as a half
damper.
In combination with any of my present improvements I use pipes for conveying
the noxious gases from the pan to the firegrate where they are decomposed. These
pipes lead from trunks on the top of pan in which are suitable slides for safety in
working. They pass outside the caldron somewhat as indicated in the specification
of my said patent No. 3783. A.D. 1882..
And in order that my invention may be understood, I will now describe it
with reference to the sheet of drawings accompanying this specification, like reference
figures being used to denote the same or similar parts where repeated on the
different diagrams.
Figure 1 is a longitudinal section of the large sized caldron and figure 2 is a half
transverse section of the same taken across the firegrate.
The arched part of central flue 1, is shewn the length of the firegrate only, but
it may be a few inches longer. Outside of this is the main central heating flue 2,
formed by the pan bottom 3, the fireclay slabs 4, and trough irons 5. The back
end plate of casing 6 is moveable, and may be secured to end angles 27, and trough
iron 10 by bolts. The back end angle 27 of casing may be put outside of the
casing as dotted on figure 1. The side flues 7 are lined with thin firebricks. The
outlet flue 8 is put at the back end in the small sized caldrons and in them the
slabs 4 are dispensed with. The upper seat angle 9 joining pan sides to casing is
rivetted to the pan and butted at ends to troughs 10. The trough 10 at back end
is utilised as an overflow channel, over which are two outlets 11 with internal lips,
one of which is shewn on figure 2. The bogie is attached by a swivel plate 12, and
sockets 26 are put on bogie axle for hooking the shafts to, the axle being slightly
tapered at ends for these sockets. Cast iron or steel sockets 13 are fixed to casing

page_text: for receiving the ends of springs. The angles 14 are put below edge of pan side
plates, the top sheets having a bar 15 under each edge which is secured to angles 14
by bolts. The pan end angles 16 are level with the edge of end plates and the top
sheets have a bar 17 secured by thumb-screws 18 to angles 16.
The main damper 19 is connected to a half damper or regulator 20. I use gas
pipes 21, one on each side of front flue, leading from trunks 22, in which are
slides 23. The chimney 24 is provided with a self acting catch 25. The chimney
crutch 28 is bolted to top edge of pan end clear of top sheets.
The improvements indicated by drawings referring to parts 6, 9, 10, 11, 13, 14, 15,
16, 17, 18, 26 and 28 ensure a great reduction in the cost of making, and allow of
all the necessary moveable parts being bolted together from the outside. The
improvement in dampers 19 and 20 prevents loss of heat when working with half
draught.
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. Constructing the central flues of caldrons for melting asphalte in the
manner substantially as herein shewn and described.
Second. Constructing the outer casing with moveable end plate substantially as
herein shewn and described.
Third. Constructing the pan covers with bars under the edges or over the ends
as herein shewn and described.
Fourth. Constructing caldrons for melting asphalte with the improved details for
reducing cost substantially as herein shewn and described.
Fifth. The use of double dampers and self-acting catch for the front flue of
caldrons for melting asphalte substantially as herein shewn and described.
Sixth. Constructing the trailing wheels with springs of requisite strength to tilt
the pan as the contents are withdrawn for the purpose herein described.
In Witness whereof I the said Brierley Denham Healey have hereunto set
my hand and seal this twentieth day of October 1884.