Drum Heads and Manifolds for Sectional
Year: 1887

page_text: Date of Application, 2nd Sept., 1887.
Specification Accepted, 4th Oct., 1887
[Communicated from abroad by THE BABCOCK AND WILCOX COMPANY, of New
York City, in the United States of America, Steam Boiler Manufacturers.]
Drum Heads and Manifolds for Sectional
I, WALLACE FAIRWEATHER, C.E., of the firm of Cruikshank & Fairweather,
62 Saint Vincent Street, Glasgow, Lanarkshire, Fellows of the Institute of Patent
Agents, 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 invention relates to the construction of manifolds and drum heads for use in
making connection between a drum and a communicating series of water tubes of
sectional water tube steam generators and the said invention consists in applying
certain novel features of construction to the said manifolds and heads for the
purpose of producing them from wrought metal and for adapting them to be
combined together.
The invention is illustrated under several modifications in the accompanying
drawings.
Referring to sheet 1 of these drawings, figure 1 is an elevation, partly broken
away, of a front drum head with a manifold connected thereto; Figure 2, a vertical
central section (at 2, x, figure 1) of the drum head and manifold, as arranged for the
front of the boiler; Figure 3, a vertical central section (at, r, figure 4) of the
drum head and manifold, as arranged for the head of the boiler; Figure 4, an
elevation, partly broken away, of the rear drum head and manifold; Figure 5, a top
view of the rear manifold; Figure 6, a cross section at y, y, of Figure 5; Figure 7,
a back view of a manifold, the perforations being omitted; Figure 8, an enlarged
section of one end of the rear manifold, taken in the plane z, z, figures 5 and 6 ;
Figure 9, a front view of the flanged portion of a drum head, in a plane normal to the
axes of the opening; Figure 10 a side view of the same.
The manifold A, consisting of a polygonal seamless tube, having on its side a

page_text: '
flanged opening, u, preferably of oval form, is fixed transversely to the drum head B,
by means of riveting or otherwise securing said flanged opening to a corresponding
flanged opening b, of said drum head, the latter in the present instance being a
domed head, to which the invention is particularly applicable.
The flanged
opening b, of the drum head lies at an angle intermediate to that of the sides of the
trapezoidal cross section of the polygonal tube A.
The ends of the polygonal tube A, are closed by means of separate heads, c,
welded or otherwise fixed therein.
One flattened side of the tube A, is provided with a series of circular perfora-
tions d, for the reception of the water tubes which are expanded; or otherwise fixed
therein. For the purpose of entering the tubes at the preferred angle to the axis of
the drum, it is desirable that the side having these perforations should stand at a
similar angle to the said axis which necessitates that the angle should be reversed
relatively to the front and rear drum heads. It will be observed that the blank
manifold (figure 7) having a trapezoidal cross-section, is capable of being connected
to the drum head as in figures 2 and 3, respectively, in reversed positions: the tube
perforations d, in the former case being made on the side f, of the trapezoid, and in
the latter, on the side f¹, thereof, whereby a front and rear drum head may be made
with one set of dies and from the same pieces. In the case of the rear drum head
when it is desirable that the connecting tubes be accessible by a tube cleaning
implement through the approximately opposite flattened side of the manifold, the said
opposite side is for that purpose provided with perforations d', corresponding to the
perforations d, and having a form suitable for the introduction of hand hole plates
(Figures 3, 4 and 5).
The portions of the flattened surfaces, between the perforations d and d¹, have by
preference corrugations or indentations e, pressed in the metal for the purpose of
stiffening these points. The said corrugations appear in section in figures 6 and 8.
Referring to sheet 2 of the drawings, which illustrates a modification of the
invention, figure 1 is an elevation, partly broken away, of a front drum head with a
manifold connected thereto; Figure 2, a vertical central section (at a -- x-figure 1)
of the front drum head and manifold; Figure 3 a vertical central section (at x - - x
figure 4) of the rear drum head and manifold; Figure 4 an elevation partly broken
away, of the rear drum head and manifold; Figure 5 a cross-section (at y -- y of
figure 6); Figure 6, a back view of a manifold; the perforations being omitted.
Figure 7, a side view of the flanged portion of a drum-head; and figure 8 a side
view of the same.
The manifold illustrated upon this sheet is constructed of two separate pieces of
wrought sheet metal pressed into trough like form, A and D, and riveted or welded
together by means of their overlapping flanges f, f¹, composing a prismatic box. The
ends of the manifold are composed of the upturned ends, c, of the piece, D, overlapped
at their edges by the edges or flanges, f of the piece A.
The flanged opening a of the piece A, by means of which the manifold is trans-
versely fixed upon the corresponding flanged opening b, of the drum head B, is of
symmetrical oval or oblong form, whereby the said manifold may be connected in
either one or the other of the reversed positions shown by Figures 2 and 3; the series
of circular tube perforations, d, being made upon the side of the manifold thus placed
lowermost, and inclined thereby in the desired direction to the axis of the drum.
Referring to sheets 3 and 4 of the drawings which show an improved combined
construction of the drum head and the manifold, figure 1, sheet 3, is an exterior end
elevation, partly broken away, of a front drum head with a manifold combined
therewith; Figure 2 a vertical central section of figure 1 taken on the line xx;
Figure 3 an interior elevation of the same; Figure 4, a horizontal section of the
same taken in the plane y--y; Figure 5, an inverted plan view thereof; and
figure 6 a cross-section on the line zz figure 1: Figure 7, sheet 4, is an exterior
end elevation, partly broken away, of a rear drum head with a manifold combined
therewith. Figure 8, a vertical central section of figure 7, on the line ¹- - x¹ ;
Figure 9, an interior clevation of the same; Figure 10, a horizontal section of the

page_text: same taken in the plane y y; Figure II, a cross section on the line ---z
figure 7; and Figure 12, a cross section on the line --, figure 9.
;
The features of the invention embodied in the drawings on these sheets, consist
First, of the segmental drum head A, having a flange a, which extends, about its
curved periphery, to the points b, thence horizontally across, relatively corresponding
to the chord of a circle, and comprising a portion of the top of the manifold; Second,
of the wrought metal plate B, of a box form preferably produced by means of dies
and hydraulic pressure, in a well known manner, comprising the tube sheet, the
back e, and the ends c of the manifold, and having the curved flange a¹, which
completes the remaining arc of the circular flange a; Third, of a flanged cover
plate C, which is riveted or otherwise secured to the parts aforesaid, forming the
remainder of the top and the front of the manifold.
Figures 6, 11 and 12, serve to more fully illustrate the conformation of the
parts B and C.
The flange a, is so formed at the points, b, as to receive the ends of the flange a'
and present a flush periphery for the reception of the exterior shell D,-indicated by
dotted lines in Figs. 2, 8 and 12.
The horizontal portion of the flange a, acts both as a stiffening beam for the
structure, and as a deflecting plate for directing the steam and water current
lengthwise of the drum.
The tube sheet B, is provided with a series of circular perforations d, for the
reception of the water tubes which are expanded or otherwise fixed therein. For the
purpose of entering the tubes at the desired angle to the axis of the drum, the
perforated portion of the tube sheet may be inclined in either direction to said axis, as
illustrated by figures 2 and 8, or may be made parallel therewith. In case the
inclination of the tube sheet is such as to render the water tubes accessible by a tube
cleaning implement, as in figure 8, the cover plate C, is for that purpose provided
with a series of perforations, d', corresponding to the perforations d, and having a
forin suitable for the introduction of hand-hole plates.
Referring to sheet 5 of the drawings which illustrates another modification of the
invention, figure 1, is an elevation, partly broken away, of a front drum head with a
manifold combined therewith; Figure 2, a vertical central section of figure 1 taken
on the line x - - - z; Figure 3, a similar section on the line y---y of figure 4.
Figure 4, an elevation partly broken away of the rear drum head; Figure 5, a cross
section of the manifold on the line ---z, figure 6; Figure 6 an elevation of the
back piece of the manifold having a flanged drum head segment; and figures 7 and 8,
an end view, and an elevation respectively, of the front piece of the manifold.
The combined manifold and drum-head embodied in this sheet of drawings is
composed of three distinct parts; First; the drum head segment A, having the
flange a; Second; the complemental drum-head segment, B, having the flange b,
and the extension or open box B¹; and, Third; a trough shaped piece C, having
perforations for the reception of water tubes or hand hole plates.
The flange a of the segment A, extends about the curved periphery of the latter,
to the points e, whence it is carried horizontally across, corresponding to the chord of
a circle, and presents a flat surface for the reception of the corresponding surface of
the complemental segment flange b, which is riveted or welded thereto. The
horizontal bridge thus formed by the united edges of the flanges, a and b, acts both as
a stiffening beam for the structure, and as a deflecting plate for directing the steam
and water current lengthwise of the drum.
The complemental segment B, is extended outwardly and transversely upon its
exterior side so as to form the open rectangular or oblong box, B', the perimeter or
flange c, of which is turned downward at an angle to the axis of the drum and
segments, as viewed in cross section in figures 2 and 3. The trough shaped piece C,
having closed ends, c', is fitted to the oblong flange c of the open box, B', and having
a V shaped cross-section, forms therewith a prismatic manifold when riveted or
welded to said flange as shown. The trough C, in the present instance has one of its
sides parallel with the angle of inclination of the extension flange c while the opposite

page_text: side is converged at an angle greater than that of said extension; it will therefore be
observed by an inspection of figures 2 and 3, that by the reversal of the trough C, its
lower surface will be inclined in one or the other direction to the axis of the drum,
for the purpose of entering the water tubes at the desired angle thereto. The side
of the trough C, which is lowermost is provided with a series of circular perforations d,
into which the ends of the water tubes are expanded or otherwise secured. The
uppermost side of the trough C, is provided with a series of perforations, d', corre-
sponding to the perforations d, and of suitable shape for the reception of hand-hole
plates.
--
Referring to sheet 6 of the drawings, which illustrates another modification of
the invention, figure 1 is an end elevation of a portion of a drum with the connecting.
hox in position thereon, Figure 2 a vertical section of the same on the line x - - x
figure 1 Figure 3 a plan view of a portion of said connecting box disconnected
from the drum ; Figure 4, a cross section of the connecting box taken on the
line y y figure 1, and viewed in an opposite direction from figure 2; Figure 5 a
vertical longitudinal section of the connecting box and a portion of the drum the
plane of said section being transverse to the drum as shown by the line --- figure 2;
Figure 6, is a cross section taken in a plane similar to that of figure 4, of a modified
detail of construction; and figure 7, a vertical longitudinal section of a portion of
the connecting box taken in a plane similar to that of figure 5 showing also the
modified feature of figure 6. .
The feature of the present modification is that of constructing the connecting box A,
of two interlocking pieces, the upper one A¹, formed from wrought metal plate into a
flanged saddle form having a continuous perimeter, 6 at its edge, and the lower
one A², consisting of a wrought metal tube sheet having also a continuous perimeter c,
at its edge to interlock or telescopo the perimeter b for the purpose of welding or
riveting the same thereto, such parts being formed by dies and hydraulic pressure, in
a manner well understood by persons skilled in the art.
The flange a, having a saddle form to coincide with the external circumference of
the drum B, for the purpose of riveting the connecting box thereto, may be
constructed so as to project outwardly as shown in the drawing, or may be turned
inwardly, in which case the opening in the drum would be reduced if necessary for
purpose.
For purposes of convenience, the saddle piece, A¹, is preferably inclined on its upper
sides, reducing its cross sectional area towards the ends.
The tube sheet A³ presents at the bottom of the connecting box a flat surface having
perforations d for the reception of tubes. For the purpose of entering the tubes at an
angle, other than a right angle to the axis of the drum, I make the said flat surface in
this instance inclined to the said axis and to the normal of the sides of the connecting
box. In other construction it may be made parallel.
The tube sheet A³, furthermore may be secured to the perimeter 6 of the saddle
piece either by means of its flanged perimeter c, or may be constructed of a thick
sheet, figures 6 and 7, the same being secured by welding, and fitted to the interior of
the extended perimeter of the saddle piece, having its edges turned to the desired
angle, as appears in figure 6.
Referring to sheet 7 of the drawings figure 1 is an end elevation of a part of a
drum and box connected in position thereto; Figure 2, a central vertical section on
the line figure 1; Figure 3, a partial plan view of the connecting box detached
from the drum; Figure 4, a cross section on the line y -- y, figures 1 and 3, viewed
in a direction opposite to that of figure 2; and figure 5, a central section of a part
of the connecting box and drum taken on the line - -, figures 2 and 3..
The present construction consists in pressing from a sheet of wrought métal an
open box A, having a perimeter a for the reception of a flanged tube sheet A', and
in pressing upon the top or back of the said open box, a saddle depression, C, made
to fit the curvature of the side of a drum B. The saddle depression, and adjacent
side of the drum, have corresponding perforations b, in which nipples, c, are inserted
for connecting the said parts, together, and establishing communication.

page_text: The saddle depression C, presents in plan view an approximate oval form bulging
at f, figures 1 and 2, which offers an increased flattened surface for the reception of
numerous perforations b.
The upper sides 9, of the box A, are preferably inclined or converged at an angle
toward the ends, for compactness of form.
The tube sheet A¹, presents at the bottom of the manifold, a flat surface d having
perforations e for the reception of water tubes. For the purpose of entering the tubes
at an angle other than a right angle, to the axis of the drum, the said flat surface may
be inclined in either direction to the said axis, or it may be parallel therewith.
Referring to sheet 8 of the drawings, figure 1 is an end elevation of a portion of a
drum, and connecting box in position thereon; Figure 2 a vertical section of the same
on the line figure 1; Figure 3, a plan view of a portion of said box disconnected
from the drum; Figure 4 a cross section of the same taken on the line y -- y
figure 1, and viewed in an opposite direction from figure 2; Figure 5, a vertical
longitudinal section of the connecting box and a portion of the drum; the plane of
said section being transverse to the drum; and fig. 6 a detached sectional view
corresponding with fig. 5, showing a modified detail of construction. The feature
of this modification is that of forming the connecting box A, substantially from a
single piece, by wrapping a plate of metal into a box form with the overlapping
edges a, welded or rivetted together at the top. The central portion of the box so
formed is depressed on its upper side in a saddle form, to fit the cylindrical side of
the drum B. The depressed portion has an oblong opening which matches the
corresponding opening B', of the drum and for the purpose of being rivetted or welded
thereon, the margins 6, of the depressed portion constitute a flange. The parts of
the flange at the ends of the opening where the box seam overlaps, are made to
present a flush exterior surface, by the proper welding of the overlapping edges in the
manner shown at f, figure 2. The top of the box is, by preference inclined so as to
converge and reduce its cross-section toward the ends as viewed in front elevation..
The ends of the connecting box or manifold, are closed preferably by separate
blocks c, or cup shaped flanged heads c', figure 6, welded or rivetted therein.
For the purpose of entering the water tubes at an inclination to the drum, the
lower side d, of the manifold is inclined as shown, presenting a trapezoidal cross
section at all points throughout its length the said inclined side d, being provided
with a series of perforations e, into which the ends of connecting tubes are expanded.
The side d, may either be inclined with relation to the axis of the drum, or parallel
therewith.
Referring to sheet 9 of the drawings figure 1, is an end elevation of a drum and
connecting box in position thereon; figure 2 a side elevation of one end of the same;
figure 3, a horizontal section (at x - - x, figure 1) of the same, and figure 4 a cross
section (at y-y figure 1) of the connecting box.
The connecting box or manifold A, consists of a chamber approximately cylindrical
closed at the ends and having an oblong opening on its upper side which matches the
opening B¹ of the drum B, figure 3. For the purpose of being rivetted or welded
thereon the said tube opening is provided with a flange a, having a saddle like form
which coincides in curvature with the external circumference of the drum. The
opening B', and flanged portion of the chamber A, as will be observed by an
inspection of figure 3, conform in outline with the figure described by the intersection
of the two cylinders, the aperture having a slightly contracting curvature towards its
centre, in accord with the original cylindrical form of the chamber from which the
manifold is produced.
The opposite or lower side of the chamber is flattened throughout its longth,
presenting a surface d of sufficient width, as more clearly shown by figure 4, for the
reception of tube perforations e into which tubes may be expanded for connecting
sections of water tubes in a manner common to water tube boilers. The flattened
portion d, corresponding in cross section with the chord of the arc of the partly
circular tube, may be formed with an incline in either direction with relation to the
horizontal axial plane of the drum, or made parallel therewith.

page_text: The ends of the chamber A, are formed of plates welded therein or otherwise
secured in place.
Referring to sheet 10 of the drawings-figure 1 is an end elevation of a drum and
connecting box in position thereon; figure 2 a sectional elevation, at a right angle to
figure 1, of the saine in the plane -; figure 3 a plan view of the connecting box
detached figure +, a cross section of the same on the line y--y figures 1 and 3; and
figure 5, a front elevation of a double drum connecting box with drums connected
thereon shown in end elevation.
The connecting box or manifold A, figures 1 to 4 inclusive, consists of a tube closed
at the ends and flattened in saddle form on its upper side to fit the curvature of the
side of the drum B, and the surface thus flattened is provided with numerous
perforations which match corresponding perforations in the adjacent side of said drum,
whereby it may be connected therewith by means of nipples a. The opposite side of
the tubular box or manifold is flat throughout its length, presenting a surface d, of
sufficient width, as more clearly shown by figures 2 and 4, for the reception of
perforations e, by which a series of water tube sections may be connected with the
drum, in a manner common to such boiler. The flattened portion d, may be inclined
in either direction with relation to the horizontal axial plane of the drum, or be
parallel therewith.
The ends c of the tube A, are formed of plates welded therein, or otherwise
secured in place.
It will be observed that the portion of the tube central to the saddle formation is
broadened, giving it a secure bearing upon the side of the drum and permitting the
production of said formation directly by the collapsing of a round tube; the
circumference remaining the same as shown.
The connecting box may be elongated and constructed with a series of two or more
saddle depressions for the reception of a corresponding number of drums, as indicated
by figure 5, the said drums being thereby communicated with one another together
with the water tube communication or irrespective of the latter.
Referring to sheet 11, of the drawings, figure 1 is an end view partly in section of
a drum and connecting box, figure 2, is a longitudinal vertical section of the same
and figures 3 and 4 are similar views of a modified construction.
The connecting box or manifold A in figures 1 and 2 is composed of plates rivetted
together the plates being flanged inwards at their upper ends which are suitably
shaped to conform to the contour of the drum to which they are rivetted, an upper
plate or plates, having in it or them orifices to match corresponding perforations in
the drum, being interposed between the box and the drum. The bottom plate of the
box which has in it perforations e, for connection to water tubes is formed with
flanges by which it is rivetted to the side and end plates. In the modification shown
in figures 3 and 4, a long box or chamber A, of trapezoidal cross section having in its
upper and lower sides orifices for connection of water tubes is connected to the drum
by means of a box like saddle formed with external flanges whereby it is rivetted to
the box so as to enclose the orifices in the upper part thereof, and to the under side of
the drum.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed (as communicated to me) I declare
that what I claim is :-
1. A domed wrought metal drum head with an opening therein flanged outwards
for the reception of a manifold substantially as described with reference to sheet 1 of
the drawings annexed.
2. A wrought metal drum head with an opening therein flanged outward, in
combination with a wrought metal manifold adapted to be attached to said flanges
substantially as described with reference to sheet 1 of the drawings annexed.
3. A wrought metal manifold for a water tube boiler formed from a polygonal
seamless tube, and provided with a flanged opening, whereby it may be attached to a
drum substantially as described with reference to sheet 1, of the drawings annexed.

page_text: 4. A wrought metal manifold for a water tube boiler formed from a polygonal
seamless tube, and provided with an opening on one side, in combination with a
wrought metal drum head having a corresponding opening substantially as described
with reference to sheet 1, of the drawings annexed.
5. A wrought metal manifold for a water tube boiler, formed from a trapezoidal
tube, and provided with an opening on a side between two inclined sides in combination
with a drum head having a corresponding opening at an intermediate angle to that of
the sides of the trapezoid, substantially as described with reference to sheet 1, of the
drawings annexed.
6. A wrought metal reversible manifold for water-tube boilers adapted to stand at
the same angle to the centre line of the drum when reversed and applied to a reversed
head, substantially as described with reference to sheet 1 of the drawings annexed.
7. A wrought metal manifold for water tube steam boilers of a trapezoidal form in
cross-section, with perforations for tubes upon one and hand holes upon the other of
the non-parallel sides, substantially as described with reference to sheet 1, of the
drawings annexed.
8. A wrought metal manifold having corrugations in the flat sides thereof
substantially as described with reference to sheet 1 of the drawings annexed.
9. The combination of a wrought metal drum head and a wrought metal manifold,
the two being rigidly secured to each other, and adapted to be connected to the shell
by rivetting the same to the flange of the drum head substantially as described with
reference to sheet 1, of the drawings annexed.
10. A combined wrought metal drum head and manifold for water tube boilers
composed of a flanged drum head and a flanged manifold, substantially as described
with reference to sheet 1, of the drawings annexed.
11. A wrought metal manifold for a water tube boiler made of two pieces bent into
shape and rivetted or welded together so as to form a prism, having two of its opposite
sides at an angle to each other substantially as described with reference to sheet 2 of
the drawings annexed.
12. A prismatic wrought metal manifold for a water tube boiler made of two pieces
riveted or welded together, having two of its opposite sides at an angle to each other,
and a flanged opening on another of the sides thereof, substantially as described with
reference to sheet 2 of the drawings annexed.
13. The combination of a prismatic wrought metal manifold made of two pieces
riveted or welded together, having two of its opposite sides at an angle to each other
and a flanged opening on another of the sides thereof, with a boiler head having a
corresponding flanged opening at an angle to the axis of the head, intermediate
to the angle of the two sides of the prismatic manifold, substantially as described with
reference to sheet 2 of the drawings annexed.
14. In a combined drum head and manifold for a water tube boiler, a flange forming
a chord of the circle, and adapted to act both as a stiffening beam for the head, and as
a deflecting plate for the current of steam and water entering through the manifold,
substantially as described with reference to sheets 3 and 4 of the annexed drawings.
15. A combined wrought metal drum head and manifold for a water-tube boiler,
consisting of (1st) a domed flanged segment, (2nd) an irregular portion having holes
for the reception of tubes and provided with a flange which supplements and completes
the circle of the segment, and (3rd) a cover plate provided with hand-holes and
riveted or welded to both the other parts, substantially as described with reference to
sheets 3 and 4 of the annexed drawings.
16. A combined wrought metal drum-head and manifold for a water-tube boiler,
consisting of (1st) a domed flanged segment, (2nd) an irregular portion having holes
for the reception of tubes and provided with a flange supplementing and completing
the circle of the segment; and (3rd) a cover plate uniting the two and riveted or
welded thereto, substantially as described with reference to sheets 3 and 4 of the
annexed drawings.
17. A combined wrought metal drum-head and manifold for a water-tube boiler,
consisting of a flanged segment of a circle and a manifold having a flange adapted to

page_text: complete the said circle, substantially as described with reference to sheets 3 and 4 of
the annexed drawings.
18. A combined wrought metal drum-head and manifold for a water-tube boiler,
in which the manifold forms a portion of the circular part of the drum head,
substantially as described, with reference to sheets 3 and 4 of the annexed drawings.
19. A combined drum head and manifold for a water-tube boiler, formed of wrought
metal, and adapted as a whole to be inserted within the periphery of a drum,
substantially as described with reference to sheets 3 and 4 of the annexed drawings.
20. A combined drum-head and manifold for water tube boilers consisting of,
(1st) a flanged segment; (2nd) a complementary flanged segment with rectangular
or oblong extension thereto, and (3rd) a trough shaped piece adapted to fit the said
rectangular or oblong extension, and form therewith a manifold, substantially as
described with reference to the figures on sheet 5 of the annexed drawings.
21. A combined drum head and manifold for a water tube boiler, consisting of (1st)
a flanged segment; (2nd) a complementary flanged segment with a rectangular or
oblong extension, at an angle to the axis of the segment, and, (3rd) a reversible
trough shaped piece with its sides forming an angle greater than the angle of the
extension, adapted to fit the said extension and form therewith a prismatic manifold
having its sides at reversible angles to the axis of the druin head, substantially as
described with reference to the figures on sheet 5 of the annexed drawings.
22. The method of making a connecting box for a water tube boiler, consisting in
first pressing from a plate of wrought metal a box having a continuous perimeter at
its edges; second, flanging the top of said box in saddle form to fit the side of a
drum; and third, fixing in the open bottom thereof a tube sheet substantially as
described with reference to sheet 6 of the annexed drawings.
23. The method of making a connecting box for a water tube boiler, consisting in
first pressing a plate of wrought metal into a box form, open at the bottom, the top
being of saddle form to fit the side of a drum; and second, closing the bottom by
fixing therein a tube sheet substantially as described with reference to sheet 6 of the
annexed drawings.
24. A connecting box for water tube boilers, consisting of a flanged saddle piece
joined to a flanged tube sheet substantially as described with reference to sheet 6 of
the annexed drawings.
25. A connecting box for water tube boilers consisting of a saddle box pressed
from one piece of metal, and a separate tube sheet riveted or welded thereto,
substantially as described with reference to sheet 6 of the annexed drawings.
26. A connecting box for water tube boilers, consisting of a box-formed saddle and
a tube sheet fixed therein at an angle to the normal of the sides, substantially as
described with reference to sheet 6 of the annexed drawings.
27. A connecting box for water tube boilers, consisting of two interlocking pieces,
each formed by pressing from one piece of metal and riveted or welded together,
substantially as described with reference to sheet 6 of the annexed drawings.
28. A connecting box for water tube boilers consisting of two pieces, each pressed
into box form and joined by riveting or welding so that the plane of the bottom is at
an angle to the centre line of the drum to which the whole is adapted to be connected,
substantially as described with reference to sheet 6 of the annexed drawings.
29. A wrought metal connecting box for water tube boilers, made of two pieces, a
saddle box and a tube sheet, riveted or welded together with substantially parallel
sides swelled into an approximate oval where it joins the drum, substantially as
described with reference to sheet 7 of the drawings annexed.
30. A wrought metal connecting box for water tube boilers having a saddle box
and tube sheet, riveted together with substantially parallel sides swelled into an
approximate oval where it joins the drum, and provided with perforations in the saddle
face through which it may be secured to and made to connect with a drum by nipples
fixed in said perforations substantially as described with reference to sheet 7 of the
drawings annexed.

page_text: 31. A wrought metal connection for water tube boilers, having two sides
substantially parallel through a great part of their surface, an approximately oval top
perforated for tubes, and curved to fit a drum, and a perforated "bottom, substantially
as described with reference to sheet 7 of the drawings annexed.
32. A wrought metal connecting box for a water tube boiler made substantially of
one piece of metal, wrapped into form and its edges riveted or welded together, the
ends being closed by blocks or cups welded or riveted therein, substantially as
described with reference to sheet 8 of the annexed drawings.
33. A wrought metal connecting box for a water tube boiler in saddle form, with
inclined ends, with a welded or riveted seam at the top, and the ends closed by small
plugs or cups, welded or riveted therein, substantially as described with reference to
sheet 8 of the annexed drawings.
34. A wrought metal connecting box for a water tube boiler, composed substantially
of a single sheet of metal, wrapped to overlap at the ends, and form an internal
flange around a central opening, by which it may be secured to a drum, substantially
as described with reference to sheet 8 of the annexed drawings.
35. A wrought metal connecting box for a water tube boiler, having the sides and
bottom of one piece, and with a trapezoidal cross section, substantially as described
with reference to sheet 8 of the drawings annexed.
36. A wrought metal connecting box for a water tube boiler consisting of a cylinder
or segment of a cylinder, one side of which is opened and flanged to fit the
side of a drum, substantially as described with reference to sheet 9 of the drawings
annexed.
37. A wrought metal connecting box for a water tube boiler consisting of a chamber
flattened upon one side and perforated for the reception of tubes, and opened and
flanged upon another side to fit the side of a drum, substantially as described with
reference to sheet 9 of the drawings annexed.
38. A wrought metal connecting box for a water tube boiler consisting of a
cylinder or a segment, closed at the ends, perforated on one side for the reception of
tubes, and fitted to be secured to the side of a drum, substantially as described with
reference to sheet 9 of the annexed drawings.
39. A wrought metal connecting box for a water tube boiler, consisting of a tube
perforated on one side for the reception of tubes, and flattened in saddle form, upon
another side for the reception of a drum, substantially as described with reference to
sheet 10 of the drawings annexed.
40. A wrought metal connecting box for water tube boilers, consisting of a tube
closed at the ends, and flattened upon one side in saddle form for the reception of two
drums whereby a connection is made between the drums substantially as described
with reference to sheet 10 of the drawings annexed.
41. A wrought metal connecting box for water-tube boilers, consisting of a tube
closed at the ends, one side perforated for the reception of tubes, and the other side
flattened in saddle form in two places for the reception of two drums whereby a
connection is made between the tubes and the drums, and also between the drums,
substantially as described with reference to sheet 10 of the drawings annexed.
42. A wrought metal connecting box for water tube boilers, consisting of a tube
flattened upon one side in a saddle form, and perforated to admit of being connected
to a drum lying in said saddle, by means of nipples fixed into said perforations,
substantially as described with reference to sheet 10 of the drawings annexed.
43. A wrought metal connecting box for water tube boilers consisting of a terminally
closed tube perforated upon one side for the reception of tubes, and flattened upon
another side in a saddle form, and perforated to admit of being connected to a drum
lying in said saddle, by means of nipples, fixed in said perforations, substantially as
described with reference to sheet 10 of the drawings annexed.
44. A wrought metal connecting box for water tube boilers composed of flanged
plates riveted together and having its upper side shaped to conform to the contour of
the drum to which it is connected by riveting, perforations being formed in the upper
B

page_text: and lower plates whereby connection is made between the drum and the tubes of the
boiler, substantially as described with reference to figures 1 and 2, sheet 11, of the
drawings annexed.
45. A wrought metal connecting box for water tube boilers, composed of a tube of
trapezoidal cross section and a connecting flanged saddle riveted to it and to the
under side of the drum perforations whereby connection is made between the drum
and the water tubes being provided in the upper and lower plates of the box
substantially as described with reference to figures 3 and 4, sheet 11, of the annexed
drawings.
Dated this Thirty-first day of Anonst 1887
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.