IMPROVEMENTS IN STEAM GENERATORS
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by William Spence at the Office
of the Commissioners of Patents, with his Petition, on the 14th
July 1870. A communication from abroad by Augustin Pierre
Joseph Renneson, of Paris, in the Empire of France, Nail Maker.
I, WILLIAM SPENCE, of 8, Quality Court, Chancery Lane, in the County
of Middlesex, Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM GENERATORS,” (being a communica-
tion to me from abroad by Augustin Pierre Joseph Renneson, of Paris,
in the Empire of France, Nail Maker,) to be as follows:-
This Invention has for its objects an increased effect in the production
of steam in generators or tubular and other boilers, and consists mainly
in the addition of a vessel or extension of the boiler placed immediately
over the fire-place, and in a particular arrangement which admits of
relighting the gases which have not been burnt during their traverse
in the flues leading to the chimney.
Other improvements relate to the construction and mounting of
the generator and admit of the same being fixed in its place complete
before commencing the construction of the brickwork furnace by which

page_text: it is to be surrounded. Owing to this arrangement the expansion and
variations produced in the brickwork are completely independent of
those which take place in the different parts of the generator which
does not derive any support from the brickwork. The whole of the
generator is composed of a boiler, under which are fitted three or more
boiler tubes with short branches leading into the boiler, such tubes
communicating at their ends with the vessel or extension. In the latter
there is a horizontal tube with a man-hole in it, and also a vertical tube
passing entirely through it for the purpose of taking the heat direct
from the fire through the said vessel or extension into a flue. The body
of the boiler rests on four supports connected in pairs by cross bars by
which they are kept apart, and the horizontal tube of the vessel or
extension rests on a plate fixed in the front of the furnace.
Also the
boiler tubes underneath the body are supported at one of their ends
by the short branches leading into the boiler, and at their other ends by
conical plugs fitting into hollow conical sockets in a chamber securely
fixed to the brickwork and also riveted to the vessel or boiler extension.
The said conical plugs are secured in their sockets by means of bolts.
By the above stated arrangement the body of the boiler, the said boiler
tubes, and the vessel or boiler extension are connected together. The
flames and heat from the fire, the greater part of which are directed
towards the said boiler tubes, pass also up through the vertical tube
and circulate round the vessel or boiler extension, and into a chamber
over the same, whence they pass by a pipe into a flue, thereby relighting
the gases coming into the same flue from the other end of the boiler.
The steam from the boiler enters a tube at the top provided with safety
apparatus as usual by means of a cock and pipe which passes along a
side flue and thereby causes the steam to be superheated as it issues
from the boiler. The generator or boiler is fed by a pipe leading into
the vessel or boiler entension by the aid of a pump, injector, or other
suitable apparatus.