IMPROVEMENTS IN STEAM BOILERS
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Benjamin Ramsden at the Office
of the Commissioners of Patents, with his Petition, on the 19th
April 1872.
I, BENJAMIN RAMSDEN, of New Wortley, Leeds, in the County of
York, Machinery Broker, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM BOILERS," to be as follows:-
My Invention consists in making steam boilers of a number of
separate sheet metal chambers or in the form of a large coiled sheet
metal tube with closed ends, such chambers or tube being constructed.
and arranged as follows:-
When the boiler is composed of separate chambers they are made of
annular, semi-annular, horse-shoe, triangular, quadrilateral, or polygonal
form in elevation, and circular in cross section, and of such size as to
admit a man for the purpose of cleaning them, and are set vertically side
by side in a horizontal brickwork setting, constructed with a horizontal
longitudinal flue or with horizontal longitudinal flues passing under or.
at the sides of the said chambers or both. These chambers thus

page_text: arranged constitute a boiler with a central horizontal flue (which com-
municates with the other horizontal flues aforesaid), and contain the
water to be evaporated, and communicate with one another through a
feed pipe (which also serves as a blow-off pipe) and branch pipes
leading therefrom into each chamber, so that the water can circulate
freely through all the chambers, the steam from which is conveyed by
branch pipes into a main steam pipe or a steam drum. Each chamber is
furnished with a man-hole, so as to admit of its being cleaned out when
required. The furnace by which the boiler is heated is constructed in
the central flue aforesaid at the front end thereof, the chambers at that 1
part being by preference made of a semi-annular or horse-shoe form
to allow the ashes from the said furnace to fall into the ash-pit beneath.
The heat from the said furnace passes first through the central flue, and
then through the horizontal longitudinal flue or flues aforesaid.
Instead of making the boiler of chambers each complete in itself, the 1
said chambers being set together as herein-before described, the said
boiler may be made of metal plates so bent and rivetted together as to
form an outer and an inner shell of such shape respectively that when
the inner shell is placed within the outer shell, and secured thereto by
bolts or rivets and angle iron, the said shell shall form a boiler 2
essentially similar in construction and action to the boiler herein-before
described, i.e. a boiler with chambers of annular, semi-annular, horse-shoe,
triangular, quadrilateral, or polygonal form, the chief point of difference
in this boiler being that its chambers are bolted or rivetted one to
another instead of being simply set side by side in the brickwork, as in §
the boiler herein first described.
When the boiler is made in the form of a large coiled tube such tube
is made by suitably bending and rivetting together plates of sheet metal.
Each of the boilers herein last described is furnished with man-holes,
steam and feed pipes, and a furnace, and set horizontally in brickwork,
essentially as described with reference to the boiler constituting the first
part of my Invention.