Improvement in Rendering Invisible the Exhaust Steam of Tramway and other Engines.
Year: 1886

page_text: Date of Application, 3rd May, 1886.
Complete Left, 3rd Feb., 1887.
Complete Accepted, 1st Apr., 1887.
PROVISIONAL SPECIFICATION.
Improvement in Rendering Invisible the Exhaust Steam of
Tramway and other Engines.
CHARLES JAMES NICHOLSON of 19 Clarendon Road, Edgbaston, Birmingham, Civil
Engineer & ALFRED GREEN of 47 Saltley Road Birmingham Mechanical Engineer do
hereby declare the nature of this invention to be as follows:-
A method of superheating the exhaust steam and afterwards passing it through the
hoiler tubes so as to be invisible when turned into the atmosphere through the chimney.
The steam is exhausted into a tank or catch box so as to collect the condensed steam
The steam is
which is constantly pumped into the boiler along with the feed water.
then led through a superheater in the smoke box formed of a series of small pipes or
of some other convenient shape giving a large heating surface, thence through a
number of pipes insertel in the chimney which instead of opening to the air vertically
over the smoke box is returned at right angles along the roof of the cab to over the
fire box & then vertically upwards the pipes containing the steam being laid inside this
flue up to this point where they are coupled together and led through the fire box into
a cast iron box (preferably in the form of an arch) in the fire box; from this box the
steam is allowed to escape through small pipes which enter a few inches into some of
the Boiler Tubes.
Ith love of Anril 188K
CHAS. J. NICHOLSON.
ALFRED GREEN.

page_text: Improvement in Rendering Invisible the Exhaust Steam or
Tramway and other Engines.
We CHARLES JAMES NICHOLSON. of 19 (larendon Road, Edgbaston Birmingham,
Civil Engineer, and ALFRED GREEN of 47 Saltley Road Birmingham, Mechanical
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 which relates to improvements in rendering invisible the exhaust
steam of Tramway and other Engines consists of exhausting the steam into a super-
heater A of any convenient shape fixed in the smoke box B, of the Engine and leading
it thence through a large number of tubes of small diameter (' to a collecting box D),
situated over the fire box of the Engine.
These tubes are kept hot by passing them through the chimney or flue of the
Engine which is returned from the smoke box to the fire box end of the Engine,
where there is an ordinary chimney opening to the air. From the collecting box the
steam is led by a pipe E through the firebox and allowed to escape through a few
small pipes G placed inside and concentric with some of the boiler tubes.
This pipe may be coiled so as to give as much heating surface as possible.
Having now particularly described the nature of our said invention & in what
manner the same is to be performed we declare that what we claim is :
A method of superheating the exhaust steam of Tramway & other Engines by
first passing it into a superheater in the smoke box then breaking it up into small
quantities by passing it through small pipes which are superheated by the hot air in
the flue, & finally passing it through the fire box and delivering it through the tubes
of the boiler so as to come into direct contact with the products of combustion & be
delivered into the atmosphere in an invisible form.
Dated this Second day of February 1887.
CHAS. J. NICHOLSON.
ALFRED GREEN.