IMPROVED APPARATUS FOR SUPERIIEATING STEAM
Year: 1881

page_text: LETTERS PATENT to Charles Denton Abel, of No. 28, Southampton Buildings,
Chancery Lane, in the County of Middlesex, for an Invention of "IMPROVED
APPARATUS FOR SUPERIIEATING STEAM." A communication from abroad by
Auguste Estrade, of Perpignan, France.
PROVISIONAL SPECIFICATION left by the said Charles Denton Abel at
the Office of the Commissioners of Patents on the 28th September 1881.
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex. "IMPROVED APPARATUS FOR SUPERMEATING STEAM."
[A communication from abroad by Auguste Estrade, of Perpignan, France.]
Steam is usually superheated by passing it through tubes exposed to the direct
action of fire, which rapidly destroys the material of the tubes, rendering theui
uscless. This Invention relates to means whereby the superheating tubes are
protected against the destructive action of the fire. For this purpose the tube or
pipe through which the steam is passed to be superheated is enclosed within an
outer pipe, in which water of the boiler circulates, the two pipes being kept con-
centric with one another by studs. The steam pipe bas placed within it at
intervals a number of metal gauze discs, which by checking and breaking up such
vesicular globules as may be carried along with the steam ensures the dryness of
the steam. In the boiler of a locomotive a portable engine superheating apparatus
of the kind described is conveniently applied in the following manner: The steam
pipe, having its mouth in the dome or highest part of the boiler, is carried forwards
along the interior of the boiler crown to the fire box, in the upper part of which it
is bent round, and backwards, and a little upwards, the hent part within the fire
box being enclosed within the outer protecting pipe, which communicates at both
ends with the water in the boiler, and which should have connected to it a blow
off pipe to clear out sediment. In boilers of forms other than that employed for
locomotive or portable engines, the steam pipo with its water casing is arranged to
suit the form and position of the furnace and flues.

page_text: The tubo D is provided at its lowest point with a branch pipe leading to the
outside, and provided with a cock, whereby any deposits within the tube may be
discharged from time to time.
Having thus described the nature of this Invention, and in what manner the
same is to be performed as communicated to me by my foreign correspondent, I
claim,―
First. Apparatus for superheating steam in steam generators, consisting of an
extension of the steam pipe into the fire box or furnace of the boiler, such
extension being surrounded by a tubular water jacket, through which tho water of
the boiler is made to circulate, substantially as herein described.
Second. In combination with a water jacketted extension of the steam tube of
steam generators into the fire box or furnace, wire gauze or perforated metal discs
within such entension, substantially as herein described.
In witness whereof, I, the said Charles Denton Abel, have hereunto set
my hand and seal, this Eighteenth day of March, in the year of our Lord
One thousand eight hundred and eighty-two.
ATTR F
ATAT