IMPROVEMENTS IN MELTING CAULDRONS FOR ASPHALTE
Year: 1886

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 CAULDRONS FOR ASPHALTE and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
Heretofore I have constructed pans or cauldrons for melting pitch asphalte and
similar compounds with tar pitch and like products, in accordance with the specifi-
cations of various patents granted to me, namely, No 2733 A.D. 1876, No 4297
A.D. 1881, N° 3783 A.D. 1882 and No 2096 A.D. 1884.
According to my present invention I construct the main central flue of curved
firebricks over the firegrate, and of cast iron at the back end. The heated gases
from the grate pass along the main central flue and return from the back end along
each side to the front where instead of escaping to the chimney as hitherto they are
lead through another flue or flues in the pan and to the chimney at the back end
of the apparatus.
In another modification of this invention the heated gases from the grate on
leaving the central fire brick flue, act upon the surface of the pan, and are then
lead through a flue or flues in the pan from the back end of apparatus to the
chimney at the front end, the flue or flues in the pan being fixed in the ends
thereof about halfway between the top and bottom so as to leave ample space for
cleaning the pan.
When the chimney is at the back end of the apparatus the back end plate of
pan answers also for the back end plate of casing and when the chimney is at the
front end the front end plate of pan answers also for the front end plate of casing.
In both arrangements the firing door frame casting is movable and covering a gap
in front plate of casing; this allows of the firebrick flue saddles being put in from
the front end without taking out the pan.
Under this invention I obtain an immense extra heating surface at the place
where the heat would otherwise be lost and without adding to the wear and tear
of the apparatus. The contents of the pan are not so liable as hitherto to froth
over and the overflow spouts are therefore not now required. The apparatus may
be mounted on two wheels or upon four or may be used without wheels although
the drawings indicate the position of two wheels.

page_text: The gases from the pan are lead through one box and pipe to the heat flues at
front or back end of apparatus always at the opposite end to the chimney and no
gauze is used. The gas box has horns cast upon the top in the larger sizes, which
horns form a rest for the chimney when the apparatus is not in use.
One end plate of the pan is secured to the casing angles with tee headed or tap
bolts and fireclay slabs bolted to the end farthest from firegrate.
When the
chimney is not in use in the small sizes it may be telescoped into the upper flue at
one end of which is a damper for regulating the draught. The chimney may be
hinged as indicated by the dotted lines and in the larger sizes this is necessary.
A crutch is provided under back end of casing and a bearing bar under front of
grate. The pan covers are hinged to each other and they have flanged edges which
overlap the outer edges and ends of pan so that no water from the top can drip
into the pan. The wheels may have cast iron boss and arms and wrought iron
tyres shrunk on and rivetted to the rim of arms, the rim being turned or not before
shrinking on the tyre.
And in order that my invention may be understood, I have attached hereto a
sheet of drawings on which like reference numbers are used to denote the same or
similar parts when repeated on the various figures.
Figure 1 is a longitudinal section of the apparatus made with upper and side
flues, figure 2 is a transverse section at the firegrate, figure 3 is a front elevation
and figure 4 is a back elevation of the same. Figure 5 is a longitudinal section of
the upper flue type with the chimney at the front end. In this modification the
iron fue and flue tail need not be used.
Firebrick flue saddles 1. Main flue 2. Side flues 3. Upper flue 4 (only one
upper flue is shewn on drawings although two or more may be used in which case
they are connected together for the chimney outlet in a manner well understood)
Chimney 5. Disc Damper 6. End plate of pan 7 fixed to Casing angles 8 by tap
bolts. Firing door frame 9 covering gap in front plate for passing in the firebrick
saddles. Grate bearers 10 bolted to grate sides. Gas box 11 forming rest for
chimney. Fireclay slabs 12 bolted to end plate. Crutch 13 stayed bearing bar 14.
Flanges on top sheets 15. Gas pipe 16. Chimney hinge in dotted lines 17.
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. Constructing Cauldrons for melting asphalte with upper flue or flues in the
manner herein shewn and described or any mere modification thereof.
2. Constructing such melting cauldrons with a gap in the front plate of casing
for passing the firebrick saddles through in the manner herein shewn and described.
3. Constructing said cauldrons with one gas box and chimney rest combined and
one gas pipe, a disc damper and with the chimney hinged as herein shewn and
described.
4. Constructing the pan covering sheets of said cauldrons with hinges and
flanged edges in the manner herein shewn and described.
5. Constructing the wheels of said Cauldrons as herein described.