IMPROVE- MENTS IN STEAM BOILERS
Year: 1876

page_text: PROVISIONAL SPECIFICATION left by De La Montagnie Moore at the Office
of the Commissioners of Patents on the 18th March 1876.
DE LA MONTAGNIE MOORE, of the City and State of New York, United States of
America, now of No. 8, Southampton Buildings, London, Gentleman. "IMPROVE-
MENTS IN STEAM BOILERS."
This Invention relates to steam boilers, and more especially to improvements in
boilers for locomotive engines and to other boilers of similar type. The said
Invention consists in various details of construction chiefly designed to be combined
with the peculiar features of the boilers described in Specification of former
Letters Patent bearing date the 31st May A.D. 1869 (No. 1674) and the 11th of
October A.D. 1872, No. 3004.
These
One feature of the present Invention is the introduction of tubes in the combus-
tion chamber in combination with the drop bridge or V shaped partition described
in the said former Specifications. The said tubes extend from the top to the bottom
of the said chamber or diagonally through the same crossing each other.
tubes greatly increase the heating surface of the boiler and assist the circulation of
the water therein. I may make these tubes with a circular transverse section, but
in some instances I make them oval or flattened with their longest axis across the
combustion chamber to give greater effect to the heating surface. The said tubes
may be parallel or of greater area at the upper than at the lower part of the com-
bustion chamber. I sometimes provide these tubes with interior circulating tubes
or plates. These interior tubes or plates should project at their end slightly beyond
the tubes which they are enclosed. These ends are open so that there is a free
passage for the water through them, as well as between the said outer tubes and
inner tubes or plates.
Another feature of this Invention is the placing of a steam drum or chamber of
a cylindrical form above the part of the boiler over the fire box. The said drum
may be either riveted directly upon the shell of the boiler or connected thereto by
short vertical tubes. For taking the steam from this drum or chamber I introduce
into the same a perforated pipe which forms the termination of the pipe for supply.
ing the steam to the cylinders of the locomotive or other engine. The steam druin
or chamber constructed and arranged as above described will be stronger and inore
durable than the steam domes of ordinary construction.
I modify this part of my Invention to adapt the same more advantageously to a
marine boiler by extending this cylindrical steam chamber or drum from end to end
[Price 20.1

page_text: of the boiler or nearly so, and constructing it with an interior tube or flue which
is connected with the smoke box of the said boiler, and conducts the products of
combustion therefrom to the chimney or smoke stack. The latter in this instance
will extend up from the said tube immediately over the fire box of the boiler. The
said cylindrical chamber is connected to the boiler by short vertical steam tubes.
This construction obviates the necessity of leaving so large a steam space in the
boiler above the fire box or combustion chamber, and prevents the difficulty which
in marine boilers of this class arises from the displacement of the water occasioned
by the rolling and pitching of the vessel in rough weather.