IMPROVEMENTS IN BOILERS
Year: 1878

page_text: LETTERS PATENT to Charles Alphonso Matthey, of Reading, in the County of
Berks, Mechanical Engineer, for the Invention of "IMPROVEMENTS IN
BOILERS."
Sealed the 26th July 1878, and dated the 29th January 1878.
PROVISIONAL SPECIFICATION left by the said Charles Alfonso Matthey
at the Office of the Commissioners of Patents on the 29th January 1878.
CHARLES ALPHONSO MATTHEY, of Reading, in the County of Berks, Mechanical
Engineer. IMPROVEMENTS IN BOILERS."
«
The improvements consist in the employment of tubes bent to an arc of a circle,
generally a semicircle, or any other convenient curve, each tube being provided
with two internal circulating tubes proceeding from the tube plate, and meeting in
the middle or other part of the bent tubes, but in such manner that their orifices
are not opposite to, but clear of each other, and in fixing such tubes in concentric
sets or otherwise to any convenient part of the water space of a boiler exposed to
the heat of the fire, preferably constructing boilers with a flat under side, to which
the tubes, as above described, are attached.
The tubes are of metal, and beaded over or otherwise secured to the boiler plate,
and the circulating tubes, also of metal, are furnished with flared mouths elevated
somewhat above the level of the top of the tube orifices, and furnished with feathers
or other convenient contrivance to keep them in position.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Alphonso Matthey in the Great Seal Patent Office on the
29th July 1878.
CHARLES ALPHONSO MATTHEY, of Reading, in the County of Berks, Mechanical
Engineer. "IMPROVEMENTS IN BOILERS."
The improvements consist in the employment of tubes bent to an are of a circle,
generally a semicircle, or any other convenient curve, each tube being provided
with two internal circulating tubes proceeding from the tube plate, and meeting in
the middle or other part of the bent tubes, but in such manner that their orifices
are not opposite to, but clear of each other, and in fixing such tubes in concentric
sets or otherwise to any convenient part of the water space of a boiler exposed to
the heat of the fire, preferably constructing boilers with a flat under side, to which
the tubes, as above described, are attached.
The tubes are of metal, and beaded over or otherwise secured to the boiler plate,
and the circulating tubes, also of metal, may be furnished with flared mouths
elevated somewhat above the level of the top of the tube orifices, and furnished
with feathers or other convenient contrivances to keep the circulating tubes in
position.
In the accompanying Drawing,
Figure 1 is a section, and Fig. 2 an elevation, with part of the shell removed, of a
vertical boiler fitted with my tubes; and Figs. 3 and 4 shew a horizontal boiler.
The side water space A, A, may sometimes be omitted.
Figs. 5 and 6 shew an elevation and plan of one tube, a, a, being the boiler plate,
into which the tube is fixed; b, b, the circulating pipes; c, c, the feathers for
keeping the circulating pipes in place.
What I claim is,-
The combination of circular or other shaped tubes having both ends fixed into
a tube plate with circulating pipes, substantially as described.
2nd. The application of such tubes to any part of the water space of existing
boilers.
In witness whereof, I, the said Charles Alphonso Matthey, have hereunto set
my hand and seal, this Twenty-ninth day of June, A.D. 1878.