Improvements in Steam Generators.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
WILHELM HÖK, Naval Architect, 13 Ashmore Street, Sunderland, and CONSITT
ELLIOTT, Superintending Engineer, 142, High Street West, Sunderland do hereby
declare the nature of this invention to be as follows:-
The principal parts of this steam generator are a horizontal receiver, a horizontal
cylinder, a circulating pipe, two or more horizontal chambers, and two or more
horizontal nests of inclined tubes.
The feed water enters the cylinder through a pipe which is led either direct into
it, or first through spaces between the nests of tubes hereafter described; then it
passes through the circulating pipe--which pipe is also led either direct to the first
chamber or first through spaces between the nests of tubes-into the first chamber.
Thence the water passes through the first uest of tubes into the second chamber,
from the second chamber through the second nest of tubes into the third chamber, from
the third chamber through the third nest of tubes into the fourth chamber and
from the fourth chamber through the fourth nest of tubes-and so on-into the
receiver in the form of steam.
The furnace gases or the products of combustion rise either straight up from the
fire between the different tubes and enter the smokebox; or they are prevented
from solely rising vertically and are forced to alternately travel horizontally by
means of fireproof tiles laid on or inserted between part of the tubes in each or
some of the nests.
The receiver which is in two parts has a flat side taking the tubes, and has a
horizontal cover which is bolted or bolted and hinged to the bottom part; or the
receiver may be cylindrical, and is in both cases attached to the cylinder below by
means of necks.
The chambers, the number of which is not necessarily four, but depending on
the number of nests of tubes adopted, are so arranged that the first and third are
in the same vertical line on the one side, and the second and fourth in the same
vertical line on the other side, of the vertical through the cylinder mentioned
above. The inner part of each chamber has flat sides taking the tubes, and the
outer part consists of a flat or convex cover which is either bolted or bolted and
hinged to the plate forming the inner part. This plate may be in one piece from
the grate to the uppermost chamber and may be made to the requisite section of
the inner part of the chambers by rolling, pressing, hammering or some other
alternative; or the inner part of the chambers may be manufactured from separate
plates which are afterwards held in position by some efficient connection.
These chambers may also be cylindrical.
The tubes are either screwed with or without nuts, or expanded into the chamber
sides, or inserted in some other efficient way; and they may also have ferrules on
the furnace side as a protection against the fire. The tubes are inclined with
reference to the horizontal and may be either straight or bent; and may be any
diameter, thickness, length, and material.
The ends of the boiler consist of plates bolted or riveted to the front and back
plate. They are, as well as the front and back between the chambers, lined with

page_text: As an alternative the uppermost nest of tubes may be led direct from the
uppermost chamber to the cylinder, in which case the receiver is omitted.
Dated this 30th day of January 1895.
Steam Generators.
WILHELM Höк, Naval Architect, 13 Ashmore Street, Sunderland, and
CONSITT ELLIOTT, Superintending Engineer, 142, High Street West, Sunderland
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 -
This steam generator is what is commonly called a water tube boiler. The
principal parts are: The horizontal receiver A, the horizontal cylinder B, the
circulating pipe C, horizontal chambers such as G D₁ G, D3, and horizontal nests
of tubes such as F F, F, and F3.
The feed water enters the cylinder B through a pipe which is led either direct
into it, or first through such spaces as H, and H between the nests of tubes; then
it passes down the circulating pipe C-which pipe also led either direct to the
first chamber G, as on the drawing, or first through such spaces as H and H₁
between the nests of tubes-to the first chamber G. Then the water passes
through the first nest of tubes F into the second chamber D, from the second
chamber D₁ through the second nest of tubes F, into the third chamber G₂, from
the third chamber G, through the third nest of tubes F, to the fourth chamber D3,
and so on—and, finally, from the last chamber through the nest of tubes F3 into the
receiver in the form of steam.
The furnace gases, or the products of combustion, rise either straight up, from
the fire, between the different tubes and enter the smoke box K; or they are
prevented from solely rising vertically, and are forced to alternately travel hori-
zontally, by means of fireproof tiles laid on, or inserted between, part of the tubes
in each or some of the nests.
The receiver A, which is in two parts, has a flat side taking the tubes F,
and has a convex cover which is bolted, or bolted and hinged, to the bottom
part; the side M may be flat or convex; or the receiver may be cylindrical,
and is in both cases attached to the cylinder B below by means of necks, L.
These
The chambers, the number of which is not necessarily four, but depending on the
number of nests of tubes adopted, are bounded on the inner side by flat sides
taking the tubes, and on the outer side by flat or convex covers, which are either
bolted, or bolted and binged, to the plate forming the inner side.
plates d e f which form the front and back of the boiler may be each in one piece
from the grate to the uppermost chamber, and may be made to the requisite section
so as to form the inner part of the chambers by means of rolling, pressing, hammering,
or some other alternative; or the inner part of the chambers may be manufactured
from separate plates which are afterwards held in position by some efficient
.connection. If these plates are rolled to the requisite section, the chambers
require end covers, but if pressed or hammered, these end covers may be dispensed
with by pressing the plate to the requisite section except at the ends where the
original flatness is retained, and by pressing the outer covers g, h, and so on, with
solid ends as shown on the drawings. (See particularly Fig. 2., Sheet 1.)
The tubes are either screwed, with or without nuts, or expanded, into the
chamber sides, or inserted in some other efficient way; and they may also have
ferrules on the furnace side as a protection against the fire. The tubes are inclined

page_text: with reference to the horizontal, and may be any diameter, thickness, length, and
material.
The ends of the boiler consist of plates bolted or riveted to the front and
back plate. They are, as well as the front and back between the chambers, lined
with fire bricks.
The number of nests with moderately inclined tubes, such as F F₁ F₂, may
be one or more; and whatever this number may be, there is always one nest
of almost vertical tubes, such as F3, which connects the uppermost chamber with
the receiver.
The number of chambers is always equal to the number of nests of tubes ;
and the circulating pipe C always connects the cylinder with the lowest horizontal
chamber.
The furnace doors may be either on the side show on the drawing or on the
opposite side if preferable.
As an alternative the uppermost nest of tubes F, may be led direct from
the uppermost chamber D, to the cylinder B, in which case the receiver A is
omitted.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. In steam generators of the water tube type the arrangement of one or
more tiers of horizontal water chambers connected by tubes moderately inclined
with reference to the horizontal with other horizontal and opposite water chambers
as substantially described above and illustrated in the drawings.
2. In steam generators of the water tube type the arrangement of having, when
the front and back are made of single plates, the horizontal chambers pressed or
hammered in such a manner that end covers are dispensed with.
3. In steam generators of the water tube type the sectional form of the receiver
when having one flat side, i.e. the side taking the tubes, and the side opposite convex
as described above.
Dated this 29th day of October 1895
W. HÖK.
C. ELLIOTT.