IMPROVEMENTS IN ROTARY STEAM BOILERS
Year: 1876

page_text: PROVISIONAL SPECIFICATION left by Thomas Morgan at the Office of the
Commissioners of Patents on the 1st September 1876. A communication from
abroad by Charles Winfield Picice, of New York City, New York County, and
State of New York, United States of America
THOMAS MORGAN, Secretary of the Inventors' Patent Right Association, Limited,
21, Cockspur Street, Charing Cross, in the County of Middlesex. "IMPROVEMENTS
IN ROTARY STEAM BOILERS.” A communication from abroad by Charles Winfield
Pierce, of New York City, New York County, and State of New York, United
States of America.
The first part of the Invention and improvements in this class of boilers* consists
of the combination with the shell and the flues nearest the shell, or with all the
flues of buckets, cups, or other devices arranged and adapted for elevating water,
and maintaining it in contact, with the shell and the tubes, or some of them during
the passage of the same in that part of their course which is above the water level,
for the protection of the shell and the tubes from the heat, also for preventing
undue expansion and contraction, and also for distributing the water and keeping
it in contact with the metal for the more rapid generating of steam.
The second part of the Invention consists of arrangements in rotary boilers,
either of an annular flange at one end of the boiler, and a recess in the wall at the
other end, or of an extension of that part of the boiler containing the inner tubes
beyond the part containing the outer ones, in connection with the recess aforesaid
on the wall of the furnace at the other end of the boiler, for effecting the return
of the heated products of combustion through the inner set of tubes.
The third part of the Invention consists of the arrangement of the feed water
pipe to extend downward to or below the water level, and the steam pipe to extend
upward from the hollow trunnions through which they enter the boiler, the one for
keeping the feed water from contact with the steam to avoid condensing it, and
the other to enable the steam to be taken out drier than it otherwise would be.
Important points of this Invention are mainly as follows:-
First. The combination with a rotury boiler of the devices whereby water is
maintained in contact with the shell of the boiler, and with the flues or a portion
of them, during part on the whole of their passage above the water level in the
rotation of the boiler.
Second. In a 10tary boiler having two sets of tubes, and at extension containing

page_text: the inner set of tubes, and being of less diameter than the outer part containing the
outer set of tubes, forming an annular chamber or an equivalent arrangement, as
for instance a flange at one end of the boiler, either on the end thereof or on the
furnace wall in connection with the recess in the wall at the other end of the boiler,
the latter being in this case of uniform length and diameter.
Third. In a rotary boiler in which the feed water, steam, and other pipes are
arranged in the hollow trunnions of the boiler, the said feed water pipe extended
downward from the hollow trunnions to or below the water level, and the steam
pipe extended upward from the same into the steam space
Fourth. In combination the boiler shell, trunnions, flues, and devices or buckets,
damper doors, and annular chambers and tube, constructed and operating substantially
as and for the purpose set forth.