Improvements in and connected with Cauldrons for Melting Pitch.
Year: 1894

page_text: Date of Application, 11th Jan., 1894-Accepted, 10th Mar., 1894
COMPLETE SPECIFICATION.
Improvements in and connected with Cauldrons for Melting Pitch.
I, BRIERLEY DENHAM HEALEY of 7 Temple Street Liverpool, in the County
of Lancaster Civil Engineer 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 improvements refer to cauldrons and apparatus and fittings connected there-
with for melting asphalte and pitch and for boiling tar, and for burning the gases
which arise therefrom.
According to my present invention I construct the cauldron with apparatus and
fittings in the manner hereinafter described and in order that my invention may be
better understood I have attached hereto a sheet of drawings.
Figure 1 is a longitudinal section, Figure 2 is a transverse section, and Figure 3 is
a front elevation of the complete apparatus, which is thereon indicated as having four
wheels for the purpose of making it portable.
Figures 4 and 5 shew alternate methods of attaching discs of safety gauze in the
gas pipes which convey the inflammable and vapourous gases from the pan to the
upper part of the fireplace when the apparatus is under fire.
Figure 6 is an enlarged section of the bogie which I use when the apparatus is
mounted upon four wheels, it is however obvious that the apparatus may be mounted
upon two wheels or erected upon brickwork or other supports.
At each end of Figure 1 are trough irons 1 for attaching the pan 2 to the end
seats of outer casing with outside bolts. The heating flue 3 may run direct to the
chimney outlet 4, or the central flue 5 may be extended so as to allow of the chimney
outlet being at the fireplace end of the apparatus.
Some of the apparatus now in use have an upper flue in the pan as shewn in the
drawing appended to Patent Specification No. 5959 A.D. 1886 and my present
improvements are particularly applicable to that form of apparatus.
Figure 2 shews alternate ways of joining the pan 2 to the side seats of the casing 6.
The right side is shewn with angles 7 and the left side is shewn with trough irons 8.
It is obvious however that in practice both sides are made alike, therefore either
with angles or with troughs.
The casing 6 is made about three inches deeper than hitherto, to provide
necessary space for the combustion of the gases, and this also allows more time
for the heat to act upon the pan, the bottom of which is made about six inches
wider than hitherto.
Figure 3 shews the gas pipes 9 leading the gases from the pan 2 to the combustion
tubes 10 which tubes are fixed over the fireplace 11.
Figure 4 shews the upper fittings of the gas pipes 9 starting from the pan cover 13
by a fixed bend 14 to which another bend 15 is hinged for allowing free access to the
gauze disc 22.
Figure 5 shews a fixed bend 14 to which is hinged a trumpet mouthed bend 20
and between the latter and the large metal cone 21 a disc of gauze is inserted at 22
by simply raising the hinged bend 20. The cones 21 rest in upper socket 23 of
pipes 9 and the joint 22 is secured by side bolts 24 with wing nuts.
The details shewn by Figure 6 include a spiral spring 25 within a metal trunk 26
with a footplate 27 to which footplate the axle 28 is secured by two glands with two
bolts each. The centre pin 29 prevents the footplate falling out of the trunk and is
provided with a suitable cotter and washer.
The fireplace doors 30 are made to slide to the right and left, the gap in front
of casing is strengthened by a trough iron 31 to which the door frame 32 is bolted

page_text: with outside bolts, and the firebars 33 rest at each end on parts of the firegrate
framing.
The shafts 34 for apparatus with four wheels have spring plates 35 at each side,
which are sprung on to the ends 36 of the bogie axle 28 to which they are secured
by cotters when the apparatus is being moved about.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. The improved method of fixing discs of gauze in an enlarged part of the gas
pipes of said melting cauldrons substantially as herein shewn and described.
2. The improved method of obtaining access to the discs of gauze in gas pipes of
said melting cauldrons substantially as herein shewn and described.
3. The improved method of burning the gases from pans of said melting
cauldrons by means of the combustion tubes 10 substantially as herein shewn and
described.
4. The improved method of making the fireplace front with trough iron joint
and sliding doors substantially as herein shewn and described.
5. The improved method of forming the side seats for joining the pan to the
casing with outside bolts as herein shewn and described.
Dated this Tenth day of January 1894.
B. D. HEALEY,
Applicant.