Improvements in and appertaining to Bollers for Melting Pitch, Asphalt, and the like.
Year: 1892

page_text: Date of Application, 11th May, 1892
Complete Specification Left, 13th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in and appertaining to Bollers for Melting Pitch,
Asphalt, and the like.
I, JAMES HAWLEY of Carruthers Street, Vauxhall, Liverpool in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
Hitherto, in boilers or cauldrons used for the purpose of melting pitch, asphalt,
and the like, the gases from the boiling pitch, etcetera, have been allowed to pass
down a pipe or pipes and into the furnace, with the result that the gases have
caught fire and the resulting flames have been known to pass up the said pipe or
pipes and into the boiler and the contents thereby set on fire.
Now one of the objects of this invention is to do away with this objection, which
I attain in the following manner :-
The pipes which convey the gases from the boiler pass into a flue, preferably a
hollow saddle flue of any suitable fire-proof material and having perforations, for
instance, in its upper or convex surface, by means of which the unconsumed gase.
escape to the chimney. The said flue is located in close proximity to the fire, so
that, when the gases have commenced to be given off from the boiling pitch,
etcetera, the flue will have then become sufficiently heated to burn the gases. With
this
arrangement, the gases cannot possibly come in contact with the fire and it does
away with the necessity for using gauze or a damper, such as has hitherto been
sometimes employed with a view to prevent the evil consequences attendant on
ignited gases.
Another improvement consists in forming a channel at one end of the boiler at a
lower level than the bottom of said boiler and placing the draw off cock at the
lowest part of the channel. The boiler or cauldron can, by this means, be
completely emptied, and moreover any stones or dirt will drop into the channel,
and not pass down the pipe leading to the draw off cock, thus leaving a clear exit
for the melted pitch.
Further, in this kind of apparatus as at present constructed, it is extremely
difficult to take the different parts to pieces owing to the bolts and nuts which hold
them together becoming clogged up with pitch and dirt. Now I provide suitable
means for overcoming this objection and also for allowing the parts to be taken
asunder very quickly and without any likelihood of breakage or damage. The
means I adopt consist in fixing a flange on the outside of the boiler, said flange
resting in and being supported by a channel iron attached to the outside casing,
both flange and channel iron extending on all sides. The connection is made air-
tight by means of sand or other suitable material. Wedges .or chocks are
then driven in between the flange and channel iron, which have the effect of
keeping the boiler firmly in position. When it is required to take out the boiler
for the purpose of repairing it, or the flue or other parts, it is only necessary to
drive out the wedges or chocks and disconnect the pipes conveying the gases from
the boiler to the flue, when the boiler is free to be lifted out.
Dated this 10th day of May 1892.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in and appertaining to Bollers for Melting Pitch,
Asphalt, and the like.
I, JAMES HAWLEY, of Carruthers Street, Vauxhall, Liverpool, in the County
of Lancaster, 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 :-
This invention has for its object improvements in boilers or cauldrons used for
the purpose of melting pitch, asphalt, and the like.
Hitherto the gases from the boiling pitch, etcetera, have been allowed to pass
down a pipe or pipes and into the furnace, with the result that the said gases have
caught fire, and the resulting flames have been known to pass up the aforesaid pipe
or pipes and into the boiler and the contents thereby set on fire.
Now this invention has for its object to make it impossible for this to happen,
and the way in which it is carried into effect, together with other improvements to
be hereinafter described, will be best understood by referring to the accompanying
drawing, in which :-
Figure 1 is an end view, partly in section, and
Figure 2 a side view, also partly in section, of a boiler or cauldron constructed
according to my invention.
In these-
A, is the boiler or cauldron (hereinafter called a boiler), and B a saddle flue of
any suitable fire-proof material located (as shown) in close proximity to the fire.
This flue is formed hollow, which is a special feature of this invention. Pipes C
convey the gases from the boiling pitch, etcetera, to the hollow flue B, which will
(by the time the said gases have commenced to be given off from the boiling pitch,
etcetera) have become sufficiently heated to burn the same.
Perforations 6 are arranged preferably in the upper or convex surface of the
hollow flue, by which any unconsumed gases may escape to the chimney D.
With this arrangement, the gases cannot possibly come in contact with the fire,
and it also does away with the necessity for using gnuze or a damper, such as has
hitherto been sometimes employed with a view to prevent the evil consequences
attendant on ignited gases.
The other improvements hereinbefore mentioned consist―
1st. In forming a channel E (as shown in Figure 2) at one end of the boiler A,
at a lower level than the bottom of the said boiler and placing the draw-off cock F
at the lowest part of it. By this means, the boiler can be completely emptied, and
any stones or dirt therein will not pass down the pipe leading to the draw-off
cock but will collect in the channel, thus leaving a clear exit for the melted pitch,
etcetera. By unscrewing the cock F, a scraper can be inserted to remove any
rubbish which may have collected in the channel.
2nd. In arranging certain parts (to be hereinafter described) so as to be easily
taken to pieces. It is well known that, in apparatus of this kind, it is extremely
difficult to take the different parts asunder, owing to the bolts and nuts which hold
them together becoming clogged with pitch and dirt. In my improved apparatus,
I fix a flange G on the outside of the boiler A, said flange resting in and being
supported by a channel iron H fixed to the outside casing I, both flange and
channel iron extending on all sides. The connection is made air-tight by means of
sand or other suitable material. Wedges or chocks are then driven in between the
flange G and channel iron H, which have the effect of keeping the boiler firmly in
position. When it is required to take out the boiler, flue, or other parts for
repairs, it is only necessary to drive out the chocks or wedges, and disconnect the
draw-off cock and the pipes conveying the gases from the boiler to the flue, when
the former is free to be lifted out.

page_text: 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 improvements in boilers for melting pitch, asphalt, and the like, consisting
in so arranging the parts of such boilers that the gases from the boiling pitch,
etcetera, are conveyed into a hollow flue, located in close proximity to the fire, and
are there burned, without coming into direct contact with the fire, substantially as
herein before described.
2. In a boiler for the purposes specified, a channel E formed at the bottom and
at a lower level than the main portion of the boiler proper, substantially as and for
the purposes described.
3. In a boiler for the purposes described, the means of attaching the boiler
proper to its casing, consisting of a flange G fixed on the boiler A and a channel H
on the outer casing I, in which the aforesaid flange can rest, both being firmly
held together by means of wedges or chocks, substantially as described.
DL: 11th do- of Fahr 1893
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.