AN IMPROVED STEAM BOILER to be as follows:
Year: 1885

page_text: We JAMES NOAH PAXMAN of the firm of Davey Paxman & Co, Engineers and
Boiler Makers, Standard Iron Works, Colchester in the County of Essex and
HENRY GEORGE PLANE of New Town Road, Colchester in the County aforesaid,
in the employment of the above firm as foreman Boilermaker, do hereby declare
the nature of our said invention for "AN IMPROVED STEAM BOILER to be as
follows:-
"
Our invention relates to the "vertical" type of steam boiler and has for its
object the increased efficiency of the boiler by increasing the heating surface, with
the further advantage of access for repairs, also for examing and cleaning the
boiler.
To attain this end we construct our boiler as follows.-We construct the outer
cylindrical shell of the boiler in the usual manner and fit inside it at its lower end
a cylindrical fire box of a height equal to about one third of the height of the outer
shell of the boiler. The fire box shell, as is usual in this class of boiler, is of a
smaller diameter than the outer shell so as to leave a water space between them.
The usual opening is made in, and connection made between the two shells for the
fire box door and the usual openings are cut in the outer shell for the man and mud
holes. So far the construction of our boiler presents no novelties but the remaining
description fully sets forth our invention. Inside the outer shell immediately above
the fire box we form opposite to one another a combustion chamber and a smoke
box each of a triangular or other suitable shape the base of each being the inner
side of the shell and the apex pointing towards the centre of it. A series of small
tubes connect the sides of the combustion chamber and smoke box with each other,
the tubes running nearly circumferentially from chamber to chamber. A flue
connects the top of the fire box with the combustion chamber, while the smoke box
is connected with the funnel, which either runs up outside the boiler, a plan we
prefer to adopt with small boilers; or inside the boiler passing out through the
crown of it, which plan we prefer to adopt with boilers of a larger size. In the
part of the outer shell forming the sides of the combustion chamber and smoke
box we form openings into which are fitted fire-brick-lined doors which give
facilities for cleaning out, withdrawing replacing, expanding or recaulking the
tubes connecting the two chambers. Instead of bending these tubes so that they
follow the circumference of the outer shell they are bent to a much larger radius

page_text: and are so arranged that they or any one of them can be inserted or withdrawn,
through the door or doors of the smoke box which very much facilitates the
construction of the boiler and its ultimate maintainance in perfect order. These
bent tubes also offer greater facilities for expanding and contracting than straight
ones.
In boilers of such a size that the flue between the fire box and the combustion
chamber is large enough to admit of a man entering the combustion chamber
through the flue, we prefer to make the combustion chamber detached from the
outer shell so as to allow a water space completely round it.
Instead of having a combustion chamber and smoke box on opposite sides of the
boiler we sometimes form but one chamber and divide it by a partition of fire-
brick, metal, or other suitable material so as to form both a combustion chamber
and a smoke box, which are then connected with each other by a series of tubes
running round the inside of the outer shell; one part of the chamber is connected
with the fire box by a flue, and the other is similarly connected to the funnel.
It will be seen that the smoke and other products of combustion after passing
out of the fire box enter the combustion chamber from which they pass through the
series of tubes to the smoke box, whence they pass away by the funnel.
85.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer & Patent Agent,
Royal Courts Chambers,
70, 71, & 72, Chancery Lane, London, W.C.,
Agent for the Applicants.
2

page_text: We JAMES NOAH PAXMAN of the firm of Davey Paxman & Co, Engineers and
Boiler Makers, Standard Iron Works, Colchester in the County of Essex; and
HENRY GEORGE PLANE of New Town Road Colchester in the county aforesaid,
in the employment of the above firm as Foreman Boilermaker do hereby declare
the nature of our said invention for "AN IMPROVED STEAM BOILER," and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
Our invention relates to the "vertical" type of steam boiler and has for its
object the increased efficiency of the boiler by increasing the heating surface, with
further advantage of access for repairs and also for examining and cleaning the
boiler.
To attain this end we construct our boiler as follows:-We construct the outer
cylindrical shell of the boiler in the usual manner and fit inside it at its lower end,
a cylindrical fire box of a height equal to about one third of the height of the outer
shell of the boiler. The firebox shell, as is usual in this class of boiler, is of a
smaller diameter than the outer shell so as to leave a water space between them.
The usual opening is made in, and connection made between the two shells for the
firebox door and the usual openings are cut in the outer shell for the man and
mud holes. So far the construction of our boiler presents no novelties but the
remaining description fully set forth our invention. Inside the outer shell imme-
diately above the fire-box we form opposite to one another a combustion chamber,
and a smoke box, each of a triangular or other suitable shape, the base of each
being the inner side of the shell, and the apex pointing towards the centre of it.
A series of small tubes connect the sides of the combustion chamber and smoke
box with each other, the tubes running nearly circumferentially from chamber to
chamber, and preferably slightly inclined so as to produce a better circulation.
A flue connects the top of the fire box with the coinbustion chamber, while the
smoke box is connected with the funnel, which either runs up outside the boiler,
a plan we prefer to adopt with small boilers, or inside the boiler, passing out
through the crown of it, which plan we prefer to adopt with boilers of a larger
size. In the part of the outer shell forming the bases of the triangular combustion
chamber and smoke box, we form openings into which are fitted doors; the doors
of the combustion chamber being lined with fire brick. These doors give facilities
for cleaning out, with-drawing, replacing, expanding, or recaulking the tubes
connecting the two chambers. Instead of bending these tubes so that they follow
the circumference of the outer shell they are bent to a greater radius and are so
arranged that they or any one of them can be inserted or withdrawn through the
doors of either the combustion chamber, or smoke box, at option, which very much
facilitates the construction of the boiler and its ultimate maintainance in perfect
order. These tubes also offer greater facilities for expansion and contraction than
straight ones.
In boilers of such a size that the flue between the fire box and the combustion
chamber is large enough to admit of a man entering the combustion chamber

page_text: through the flue we prefer to make the combustion chamber detached from the
outer shell so as to allow a water space completely round it.
Instead of having a combustion chamber and smoke box on opposite sides of the
boiler we sometimes form but one chamber and divided it by a partition of brick
metal or other suitable material so as to form both a combustion chamber and a
smoke box, which are then connected with each other by a series of tubes running
round the inside of the outer shell; one part of the combustion chamber is
connected with the fire box by a flue, and the other is similarly connected to the
funnel.
It will be seen that the smoke and other products of combustion after passing
out of the fire box enter the combustion chamber, from which they pass through
the series of tubes to the smoke box whence they pass away by the funnel.
In order that our invention may be fully understood we will more particularly
describe it with the aid of the accompanying drawings on which similar parts are
marked with like letters of reference.
Fig. 1 is a vertical section and Fig. 2 a cross section on line v. w. of our improved
boiler with a separate combustion chamber and smoke box, and with an external
funnel. Fig. 3. is a vertical section and Fig. 4. a cross section, on line x. y. of our
boiler, also with a separate combustion chamber and smoke box, but with an
internal funnel. Fig. 5 is a cross section on line z. z. of our boiler with a divided
combustion chamber and smoke box. Our boiler is constructed with an outer
cylindrical shell A constructed in the usual manner and inside it at its lowest end
is a cylindrical fire box B, the shell of which, as is usual in this class of boiler, is
of a smaller diameter than the outer shell A so as to leave a water space between
them. The usual opening is made in, and connection made between, the two shells
for the fire box door, and the usual openings are cut in the outer shell for the man
and mud holes. Inside the outer shell A immediately above the fire box B we form
opposite to one another, a combustion chamber C and a smoke box E each of a
triangular or other suitable shape, the base of each triangle being the inner side of
the shell, and the apex pointing towards the centre of it. A series of small
tubes d. d etc. connect the sides of the combustion chamber Cand smoke box E with
each other, the tubes d. d etc. running nearly circumferentially from the one chamber
to the other, and preferably slightly inclined so as to produce a better circulation.
A flue D connects the top of the fire box B with the combustion chamber C, while
the smoke box E is connected with the funnel F which either runs up outside the
boiler as shown in Figs. 1. 2. 5. and 6; or inside as shown in Figs. 3. and 4. In
the part of the outer shell A forming the side of the combustion chamber C, and
smoke box E, we form openings into which are fitted doors c and e respectively,
the former being preferably lined with fire-brick; these doors give facilities for
cleaning out, withdrawing, replacing, expanding, or recaulking the tubes connecting
the two chambers. Instead of bending the tubes d. d etc so that they follow the
circumference of the outer shell A they are bent to a larger radius and are so
arranged that they can be inserted or withdrawn through the door e of the smoko
box E which greatly facilitates the construction of the boiler, and its maintainance
in perfect order. These bent tubes d. d etc also offer greater facility for expansion
and contraction than straight ones.
In boilers of such a size that the flue D is large enough to admit of a man
entering the combustion chamber C through it, we prefer to make the combustion
chamber C detached from the outer shell A so as to allow a water space completely
round it.
Instead of having a combustion chamber and smoke box on opposite sides of the
boiler we sometimes form but one chamber and divided it by a partition G of
fire-brick, metal, or other suitable material so as to form both a combustion
chamber C and smoke box E, as shown by Figs. 5 and 6. The combustion
chamber and smoke box are then connected with each other by a series of
tubes d, d, etc, running round the inside of the outer shell; the combustion part

page_text: of the chamber is connected with the fire box B by a flue D, and the smoke box
part is connected to the funnel F.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is
First. A boiler constructed, arranged, and operating as, and for the purpose,
herein before described and shown.
Second. In a vertical boiler the combustion chamber C connected with the fire
box B by the flue D, and the smoke box E connected with the combustion
chamber C by the small tubes d. d. etc. all combined, arranged, and operating as
and for the purpose hereinbefore set forth.
Third. The arrangement of the tubes d. d etc. in combination with the
combustion chamber C, and the smoke box E, whereby they may be withdrawn as
and for the purpose hereinbefore set forth.
Fourth. In a vertical boiler the separate independent combustion chamber and
smoke box, connected by curved tubes as and for the purpose herein before set
forth.
Dated this 10th day of December 1885.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer & Patent Agent,
Royal Courts Chambers,
70, 71, & 72, Chancery Lane, London, W.C.,
Agent for the Applicants.
ember 1885.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer & Patent Agent,
Royal Courts Chambers,
70, 71, & 72, Chancery Lane, London, W.C.,
Agent for the Applicants.