Improvements in Steam-boilers.
Year: 1888

page_text: Date of Application, 4th Sept., 1888
Specification Accepted, 5th Oct., 1888
COMPLETE SPECIFICATION.
Improvements in Steam-boilers.
I GEORGE FREDRICK NILSSON, Mechanic, of Belmont, in the County of
Middlesex, State of Massachusetts, one of the United States of America, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement
My invention relates more especially to that class of boilers which are used for
heating purposes both with steam and hot water; and it consists in certain novel
features, as hereinafter fully set forth the object being to produce a simpler and more
effective device of this character than is now in ordinary use.
The nature and operation of the improvement will be readily understood by all
conversant with such matters from the following explanation.
In the accompanying drawing
Figure 1 is a vertical longitudinal section of my improved boiler and its casing
taken on line x, x in figure 2, and
Figure 2 a vertical section of the same taken on line y, y, in Figure 1.
In the drawing A represents the boiler proper, B the chimney or smoke-stack,
C the fire-box and D the casing, these parts being all of the ordinary form and
construction.
The boiler A is also supplied with a steam-dome E, and flues b, in the usual
manner.
A vertically arranged pipe a enters the under side of the boiler near the rear end
thereof, a horizontally arranged pipe, being centrally connected to the lower end of
the pipe, and extending out through the casing D, at each side thereof as shown in
Figure 2.
A longitudinally arranged inclined pipe v, connects each end of the pipe 2, with
[Price 8d.1

page_text: the end of a horizontally arranged pipe f, which rests on the bridge-wall H, near
the fire-box and extends through the casing D, said pipes v being also outside
said casing.
A horizontally arranged pipe m is disposed on the bridge wall H below the rear end
of the boiler, said pipe extending through the casing D, and being provided with a
valve or faucet t (see figure 2) at one end.
Two short inclined pipes g, (see figure 1) connect the ends of the pipe = with those
of the pipe m, outside the casing.
A horizontally arranged pipe
is disposed beneath and near the head of the boiler,
said pipe passing through the casing D.
A vertically arranged pipe i, is secured to each end of the pipe h, and passes back
through the casing into the boiler A, at 1, or just below the water line, one end of the
pipe, being provided with a valve or faucet p.
Eight longitudinally arranged inclined pipes 7, connect the pipe h, with the pipe m,
and a corresponding number of vertically arranged pipes connect the pipes q with
the pipe f.
In the use of my improvement, the boiler A is filled with water in the usual manner,
which passes into and fills the pipes described.
Fire being started in the fire-box, the pipe h, and adjacent portions of the pipe 9,
become heated first, causing the heated water in said pipes to rise through the
pipes, into the boiler w just below the water line, thereby producing a
circulation of water between the boiler and system of pipes beneath it which
becomes continuous.
The heated air, smoke and products of combustion from the fire-box pass in the
direction indicated by the arrows in Figure 1, through the flues d, of the boiler in
the usual manner, thus keeping the water in said pipes constantly heated to a high
temperature.
Steam is taken from the boiler A, for heating purposes in the usual manner; and
by attaching pipes to the valves pt, hot water may be conducted to any
position desired and a continuous circulation kept up through the same,, as
described.
Moreover, by using my system of pipes I find that the boiler A, may be constructed
about one-third the size ordinarily required to produce a given result, thus effecting a
great saving in the cost of construction.
I do not confine myself to using any specific number of the pipes 9, as they
may be varied to suit the size of the boiler or in accordance with the circumstances
of the case.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
First. In a boiler of the character described, the combination of the following
instrumentalities, to wit; a body, a vertical pipe tapping said body at the rear on the
under side thereof; a transversely arranged pipe connected centrally with said vertical
pipe and extending through the boiler casing a transversely arranged pipe disposed
on the bridge wall near the fire-box and extending through the casing; inclined pipes
connecting the ends of said transverse pipes outside the casing a transversely
arranged pipe disposed on the bridge wall under the rear end of the boiler and
extending through the casing, the ends of said pipe being connected with the transverse
pipe which is connected with said vertical pipe; a transversely arranged pipe passing
through the casing near the forward end of the boiler; inclined pipes connecting
said pipe with the transverse pipe at the rear of the bridge wall; and vertical pipes
connecting the ends of the transverse pipes and the body of the boiler below the water
line, all being arranged to operate substantially as set forth.
Second. In a boiler, a series of longitudinally and transversely arranged horizontal
pipes connected with each other and with the body of the boiler below the water line,
said pipes being disposed in or partially in the fire-box and a flue leading from the

page_text: fire-box to the smoke-stack or chimney, and adapted to be connected with conducting
pipes for conveying the hot water to points at a distance from the boiler for heating
purposes, substantially as described.
Third. In a boiler, the body or boiler proper A, having the flues d, and dome E, the
vertical pipes, æ, r, i, transverse pipes = mfh, inclined pipes qg, bridge wall, H,
and casing D, combined and arranged to operate substantially as set forth.
Dated this 4th day of Santamber 1888
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.