IMPROVEMENTS IN ASPHALTE APPARATUS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Brierley Denham Healey at the
Office of the Commissioners of Patents on the 30th July 1883.
BRIERLEY DENHAM HEALEY, of Brighouse, in the County of York, Civil
Engineer-IMPROVEMENTS IN ASPHALTE APPARATUS
This Invention has reference to pans or apparatus used for melting pitch, and
producing hot bituminous compounds of tar and pitch or other. similar products,
and is an improvement on the apparatus described in the specifications of my
patents No. 2733. A.D. 1870, No. 4297. A.D. 1881 and No. 3783. A.D. 1882.
According to my present Invention the method of collecting the pungent gases
is the same as described in my said specifications, but the power of conveying tho
gases to the fireplace is greatly increased by dispencing with the gauzes which
have been found very troublesome. The gas boxes have solid slides for shutting
off the gases instead of gauzes and frames, and in working the apparatus the
firing doors are closed before the slides are drawn, and the slides are shut before
the firing doors are opened. The latter operations may be combined with the use
of suitable levers and rods, which lock the slides when the doors are open and
release the slides when the doors are shut. By the latter method it is impossible
for the fireman to make a mistake by opening the slides at the wrong time, and
there is absolute safety in working at all times.
The back end of casing is bolted to the end angle irons, and by removing it
instead of taking out the pan as hitherto, a full inspection may be made of the
flues, or they may be throughly cleaned, or they may be renowed, in half the
time usually required. The firebrick saddles over the firo grate are quarter-circle
in section, two such pieces forming a semi-arch, they are set at a lower level than
formerly, requiring no tio bolts, and are far more durable than hitherto.
The pan seats are formed of channel irons at each end to which the casing ends
are bolted from the outside, and angle iron seats are run from end to end on each
side of pan with butt joints against the channel irons. The long overflow spouts
are dispensed with and a short one is formed near each corner at back end of pan
projecting inwards. The overflowings pass over the lowest spout into the back
end channel, which leads them to the corner, and they fall quite clear of the
apparatus into a bucket or other receptacle.

page_text: The main flue is of cast stecl or decarbonised iron, the flue tail curves upwards
resting on bricks at back end, and has a joggle joint on main flue. The front end
is tied by a strap which runs over the fire brick saddles to the front end plate and
binds the whole flue endwise. This main flue runs from the back of fire grate
towards the back end of casing where the heat passes to the side flues as hitherto.
The side angles at the top of the pan are put outside the pan and the end
angles are put inside and joggled for the corner angles. By the last named
arrangement all the bolts for securing the top sheets may be put in from the
outside.
The apparatus is mounted on wheels as hitherto, but to the larger sizes for
which bogies may be used, I put a spiral spring-inside the central casting of the
bogio saddle. On the leading axle of fourwheeled apparatus I attach cast steel
or malleable sockets for the shafts to hook into. The main springs have cast
sockets which are bolted to the casing, one socket of each pair having a pin for
securing the springs
All the casings are lined with split bricks, and each apparatus is now provided
with hinged chimneys, and they have firebrick saddles over the fire grates of both
small and large sizes. The pan covers are made in halves, the ends of each sheet
having a slight drip to prevent rain water from getting into the pan at the side
joints.