I■-. PROVEMENTS IN STEAK BOILERSAND
Year: 1875

page_text: In the Matter of Letters Patent granted to CHARLES JOHN
GALLOWAY, of the Knott Mill Iron Works, Manchester, in the
County of Lancaster, Engineer, and OHARLES HERBERT HOLT,
of Manchester, aforesaid, Engineer, for an Invention of "I■-.
PROVEMENTS IN STEAK BOILERS," bearing date the 13th July,
One thousand eight hundred and seventy-five.
DISCLAIMER AND MEMORANDUM OF ALTERATION as proposed to
be entered by the said Charles John Galloway and Charles Herbert
Holt pursuant to the Statutes in that case made and provided.
WHEREAS Her Majesty Queen Victoria by Her Letters Patent under
the Great Seal of the United Kingdom of Great Seal of the United
Kingdom of Great Britain and Ireland, bearing date at Westminster the
Thirteenth day of July, One thousand eight hundred and seventy-five,
did give and grant unto us, the said Oharles John Galloway and Charles
Herbert Holt, our executors, administrators, and assigns, the sole
privilege for the term of fourteen years thence next ensuing of making,
using, exercising, and vending within the United Kingdom of Great

page_text: Britain and Ireland, the Ohannel Islands, and the Isle of Man, the said
Invention of "IMPROVEMENTS IN STEAM BOILERS:"
And whereas pursuant to the 9th Section of the Patent Law Amend-
ment Act, 1852, we, the said Charles John Galloway and Charles Herbert
Holt, did, at the time of applying for the said Letters Patent, cause a
Specification in writing under our hands and seals, purporting to
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed to be duly filed in the Great Seal
Patent Office:
And whereas since the filing of the said Specification, we the said
Charles John Galloway and Charles Herbert Holt have discovered that
part of the said Invention, as described and claimed in the said Specifi-
cation, may be objected to on the ground that as described and claimed
it was not new; in consequence thereof we hereby disclaim and alter
parts of the said Specification and claiming clauses in manner following, :
that is to say-Referring to the Queen's Printers' copy of the said
Specification, at page 2 line 12 we omit the words "one of," we omit
and disclaim the part of the Specification beginning with the words
" Although we prefer" at page 2 line 34, and ending with the words
." of the section shewn at Fig. 2" at page 3, lines 24 and 25; and at
page 3 line 31 we omit the word "First," we also omit and disclaim the
"Second," "Third," and "Fourth" claiming clauses at page 4, lines 1
to 11; and we desire that Figure 2 of the Drawings be considered as
expunged. And the said Specification when disclaimed and altered will
read as follows :-
:-
COMPLETE SPECIFICATION filed by Charles John Galloway and
Charles Herbert Holt at the Office of the Commissioners of
Patents, with their Petition and Declaration, on the 13th July 1875,
pursuant to the 9th Section of the Patent Law Amendment Act,
1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
JOHN GALLOWAY, of the Knott Mill Iron Works, Manchester, in the
County of Lancaster, Engineer, and CHARLES HERBERT HOLT, of
Manchester, aforesaid Engineer, send greeting.
3
WHEREAS we are in possession of an Invention for "IMPROVEMENTS 3
IN STEAM BOILERS," and have petitioned Her Majesty to grant unto us,
our executors, administrators, and assigns, Her Royal Letters Patent

page_text: for the same, and have mado solemn Declaration that we are the truo
and first Inventors thereof.
NOW KNOW YE, that we, the said Charles John Galloway and
Charles Herbert Holt, do hereby declare that the following Complete
Specification, under our hands and seals, fully describes and ascertains
the nature of the said Invention, and in what manner the same is to
be porformed, in and by the following statement, reference being had
to the accompanying Sheet of Drawings and to the figures and letters
marked thereon, that is to say:―
Our improvements relate to internal flued or Cornish steam boilers
having water tubes fixed inside the internal flues.
•
According to our present improvements we construct the internal
flue of the boiler, as shewn in the transverse section at Fig. 1 of the
Drawings, the concave top A and the convex bottom 4' being both
struck from one and the same centre B; and in the flue we fix a
number of water tubes C (which may be parallel, but are by preference
of a tapering form, such as aro generally known as "Galloway" tubes,)
all radiating from the same or nearly the same centro B from which the
curvatures of the top and bottom of the flue are struck. By this arrange-
ment the top and bottom flanges c, c', of the tubes are all square to the
centre line of the tubes, and the flanges of the one tube being thus
exactly the same as those of the others the tubes are rendered inter-
changeable, which was not possible with the arrangement of vertical
tubes in oval flues employed heretofore, where the flanges of some of the
tubes are necessarily oblique, while those of the others were square. In
addition to this advantage our improved arrangement affords the further
one that, as the flanges of the lower ends of the tubes can be brought as
close together as those of the upper ends, the bottom plate of the flue
need not be made of increased strength, as was necessary with the vertical
arrangement of conical tubes used heretofore, on account of the extent of
unsupported plate that necessarily occurred between the flanges of the
lower small ends of the tubes when the flanges of the upper ends were
close together.
Having thus described the nature of our Invention and in what
manner the same is to be performed, we wish it to be understood that
we do not claim the use of boiler flues generally, having the upper part
concave and the lower part convex, as we are aware that such a con-

page_text: struction has been used many years since, but we claim, constructing
the internal flues of steam boilers with the top part concave and the
bottom part convex in transverse section, and fitting therein water tubes
radiating from the same, or nearly the same, or nearly-the-same centre
from which the curvatures of the said top and bottom parts are struck, t
substantially as and for the purpose herein described in reference to
Fig. 1 of the Drawings.
In witness whereof, we, the said Charles John Galloway and
Charles Herbert Holt, have hereunto set our hands and seals,
this Twelfth day of July, in the year of our Lord One thousand 1
eight hundred and seventy-five.
CHARLES JOHN GALLOWAY. (L.S.) -
CHARLES HERBERT HOLT. (L.S.) .
In witness whereof, we, the said Charles John Galloway and
AL
I hereby grant my fiat, giving leave to the above-named Charles
John Galloway and Charles Herbert Holt, to file in the Great Seal
Patent Office, with the Specification to which the same relates, the
above-written Disclaimer and Memorandum of Alteration.
HARDINGE Giffard.

page_text: LETTERS PATENT to Charles John Galloway, of the Knott Mill Iron
Works, Manchester, in the County of Lancaster, Engineer, and
Charles Herbert Holt, of Manchester aforesaid, Engineer, for the
T
COMPLETE SPECIFICATION filed by Charles John Galloway and Charles
Herbert Holt at the Office of the Commissioners of Patents, with
their Petition and Declaration, on the 13th July 1875, pursuant to
the 9th Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
JOHN GALLOWAY, of the Knott Mill Iron Works, Manchester, in the
County of Lancaster, Engineer, and CHARLES HERBERT HOLT, of Man-
chester aforesaid, Engineer, send greeting.
WHEREAS we are in possession of an Invention for "IMPROVEMENTS
IN STEAM BOILERS," and have petitioned Her Majesty to grant unto us, our
executors, administrators, and assigns, Her Royal Letters Patent for the

page_text: But, and Dave made solemn Declaration that we are the true and ISL
Inventors thereof.
NOW KNOW YE, that we, the said Charles John Galloway and Charles
Herbert Holt, do hereby declare that the following Complete Specifi-
cation, under our hands and seals, fully describes and ascertains the
nature of the said Invention, and in what manner the same is to be
performed in and by the following statement, reference being had to tho
accompanying Sheet of Drawings, and to the figures and letters marked
thereon, that is to say :-
Our improvements relate to internal flued or Cornish steam boilers, 1
having water tubes fixed inside the internal flues.
According to one of our present improvements we construct the
internal flue of the boiler as shewn in the transverse section at Fig. 1 of
the Drawings, the concave top A and the convex bottom A' being both
struck from one and the same centro B; and in the flue wo fix a number]
of water tubes C (which may be parallel, but are by preference of a
tapering form, such as are generally known as "Galloway" tubes), all
radiating from the same or nearly the same centre B, from which the
curvatures of the top and bottom of the flue are struck. By this
arrangement the top and bottom flanges c, c³, of the tubes are all square
to the centre line of the tubes, and the flanges of the one tube being
thus exactly the same as those of the others the tubes are rendered
interchangeable, which was not possible with the arrangement of vertical
tubes in oval flues employed heretofore, where the flanges of some of the
tubes are necessarily oblique, while those of the others were squarc.
In addition to this advantage our improved arrangement affords the
further one that as the flanges of the lower ends of the tubes can be
brought as close together as those of the upper ends the bottom plate of
the flue need not be made of increased strength, as was necessary with
the vertical arrangement of conical tubes used heretofore, on account of
the extent of unsupported plate that necessarily occurred between the
flanges of the lower small ends of the tubes when the flanges of the upper
ends were close together.
Although we prefer to strike the curvature of both the top and the
bottom of the flue from one common centre, yet we do not limit our-
selves to this arrangement as considerable advantage will still be obtained
from the above construction, even if the curvatures are struck from

page_text: different centres, the centre lines of the tubes being made perpendicular,
either to the one or the other curvature. .
We also in some case make either the top A or the bottom A' of the
flue flat instead of curved, the tubes being made to radiate from the
centre from which the curved top or bottom is struck. By this arrange-
ment, although the advantage of having the tubes all interchangeable is
not obtained, yet the tubes would all be alike as regards the flanges
fitting against the curved part, and they would only require to be specially
formed at the one end to fit the flat side. In the case of the curved top
the bottom might even be made concave instead of convex or flat.
According to another improvement we construct the internal flue of
the boiler as shown in the transverse section at Fig. 2, consisting of two
nearly circular parts A, A, running into each other in the middle at A',
the flue being consequently of a convex form at top and bottom at this
point. We connect such convex top and bottom part of the flue by
vertical conical water tubes C, and in the circular parts A, A, of the flue
we fix diagonal conical water tubes C³, C¹.
In both the above arrangements the flues may either extend the whole
length of the boiler of the section shewn, thus giving a single wide
furnace at one end, or they may only extend part of the length of that
section, and be made to join two separate cylindrical tubes at one end,
in which two separate furnaces are provided. Or, according to another
arrangement, we make the back part of the flue of the section shewn
at Fig. 1, and the front part containing the furnace of the section shewn
at Fig. 2.
Having thus described the nature of our Invention and in what
manner the same is to be performed, we wish it to be understood that
we do not claim the use of boiler flues generally having the upper part
concave and the lower part convex, as we are aware that such a con-
struction has been used many years since, but we claim,-
-
First. Constructing the internal flues of steam boilers with the top
part concave and the bottom part convex in transverse section, and
fitting therein water tubes radiating from the same, or nearly the same
centre from which the curvatures of the said top and bottom parts are
struck, substantially as and for the purpose herein described in reference
to Fig. 1 of the Drawings. -

page_text: Second. Constructing the internal flues of steam boilers with either
their upper or their lower sides, or both, curved, and fitting thereto tubes
radiating from the centre from which the curved side is struck, sub-
stantially as herein described.
Third. Constructing the internal flues of steam boilers, and arranging t
conical or tapering water tubes therein, as herein described in reference
to Fig. 2 of the Drawings.
Fourth. Constructing the internal flues of steam boilers with the back
part containing the water tubes of the form herein described and shewn
in Fig. 1 of the Drawings, and with the front part containing the furnace 1
of the form herein described and shewn in Fig. 2.
"In witness whereof, we, the said Charles John Galloway and Charles
Herbert Holt, have hereunto set our hands and seals, this Twelfth
day of July, in the year of our Lord, One thousand eight
hundred and seventy-five.
1