IMPROVEMENTS IN THE MODE OR MODES OF FITTING WATER TUBES, APPLICABLE TO STEAM BOILERS AND ENGINES
Year: 1873

page_text: LETTERS PATENT to Thomas Moy, of 1, Clifford's Inn, in the City of
London, Engineering Draughtsman, and Richard Edmund Shill, of
Mile End, in the County of Middlesex, Engineer, for the Invention
of "IMPROVEMENTS IN THE MODE OR MODES OF FITTING WATER TUBES,
APPLICABLE TO STEAM BOILERS AND ENGINES."
Sealed the 13th May 1873, and dated the 19th March 1873.
PROVISIONAL SPECIFICATION left by the said Thomas Moy and
Richard Edmund Shill at the Office of the Commissioners of Patents,
with their Petition, on the 19th March 1873.
We, THOMAS Mox, of 1, Clifford's Inn, in the City of London,
Engineering Draughtsman, and RICHARD EDMUND SHILL, of Mile End,
in the County of Middlesex, Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THE MODE OR MODES OF FITTING
WATER TUBES, APPLICABLE TO STEAM BOILERS AND ENGINES," to be as follows:-
Our Invention has reference to improvements in the mode of fitting
water tubes in steam engines of the kind described in the Specifica-

page_text: tion of the Patent granted unto us and bearing date October 18th,
1871, No. 2762, or water tubes otherwise applied and intended to be
externally heated.
In the said Specification the ends of the water tubes are represented
and described as inserted in tube plates bolted or cast on to the chambers
or reservoirs surrounding the steam cylinder or cylinders.
Now our present Invention consists in the first place in fitting the
ends of the said tubes in the tube plates in such a manner as to facilitate
their removal and replacement as may be required.
For this purpose conical holes are formed in the tube plate having
internal screws into which the ends of the water tubes are fastened by
means of nuts more or less conical, such nuts being screwed on to the
ends of the water tubes and into the said conical holes. By this arrange-
ment the ends of the water tubes are fixed in the tube plate by turning
the nut with a crowfoot or other spanner so as to work the nut into the
conical hole and cause the compression of the said nut, such compression
making the joint steam and water-tight. The nut may be also turned
in the opposite direction so as to loosen and withdraw the end of the
water tube with facility when required.
And our Invention consists, secondly, in fixing the ends of the water
tubes in conical holes formed in the side of the chambers or reservoirs
surrounding the cylinders of such engines as those referred to by means
of the said nuts, thereby dispensing with the use of tube plates. In this
case also the water tubes are sometimes bent so as to economize the
space occupied by them and facilitate the application of heat to them,
that is to say, instead of extending in radial lines from the circumference
of the said chambers or reservoirs the tubes are sometimes bent so that
the main portion of their lengths are in lines parallel with one of the
diameters of the cylinder.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Moy and Richard Edmund Shill in the
Great Seal Patent Office on the 18th September 1873.

page_text: man, and RICHARD EDMUND SHILL, of Mile End, in the County of
Middlesex, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of March, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Thomas Moy and Richard Edmund Shill, Her
special licence, that we, the said Thomas Moy and Richard Edmund
Shill, our executors, administrators, and assigns, or such others as we,
the said Thomas Moy and Richard Edmund Shill, our executors, admi-
nistrators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,.
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN THE MODE OR MODES
OF FITTING WATER TUBES, APPLICABLE TO STEAM BOILERS AND ENGINES," upon
the condition (amongst others) that we, the said Thomas Moy and
Richard Edmund Shill, our executors or administrators, by an in-
strument in writing under our, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said Thomas Moy and Richard Edmund
Shill, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, reference being had to the
Drawings hereunto annexed and to the letters and figures marked thereon
(that is to say):--
Our Invention of "Improvements in the Mode or Modes of Fitting
Water Tubes, applicable to Steam Boilers and Engines," consist in the
mode of fitting water tubes in steam engines of the kind described in
the Specification of the Patent granted unto us and bearing date October
Eighteenth, One thousand eight hundred and seventy-one, No. 2762,
or water tubes otherwise applied, and intended to be externally heated.

page_text: In the said Specification the ends of the water tubes are repre-
sented and described as inserted in tube plates bolted or cast on
to the chambers or reservoirs surrounding the steam cylinder or
cylinders.
Now our present Invention consists in the first place in fitting the
ends of the said tubes in the tube plates in such a manner as to facilitate
their removal and replacement as may be required.
For this purpose conical holes are formed in the tube plate having
internal screws into which the ends of the water tubes are fastened by
means of nuts more or less conical, such nuts being screwed on to the ends
of the water tubes and into the said conical holes. By this arrangement
the ends of the water tubes are fixed in the tube plate by turning the
nut with a crowfoot or other spanner, so as to work the nut into the
conical hole, and cause the compression of the said nut, such compression
making the joint steam and water tight. The nut may be also turned
in the opposite direction so as to loosen and withdraw the end of the
water tube with facility when required.
And our Invention consists, secondly, in fixing the ends of the water
tubes in conical holes formed in the side of the chambers or reservoirs
surrounding the cylinders of such engines as those referred to, by means
of the said nuts, thereby dispensing with the use of tubes plates. In
this case also the water tubes are sometimes bent so as to economise
the space occupied by them and facilitate the application of heat to
them, that is to say, instead of extending in radial lines from the cir-
cumference of the said chambers or reservoirs the tubes are sometimes
bent so that the main portions of their lengths are in lines parallel with
one of the diameters of the cylinder.
Having thus stated the nature of the said Invention we will proceed
to describe more particularly in what manner the same is to be performed
by the aid of the accompanying Drawings, in which are represented the
modes of fitting tubes above referred to.
Fig. 1 is a diagram of one of our modes of fitting > tubes (partly in
section). The two ends of the tube are screwed with a screw tap, and
a nut is tapped to fit the said screw. This nut is also screwed outside, 3

page_text: and the tube plate a is bored to receive the nuts b. The holes bored
in the tube plate a are bored slightly conical, that is, of smaller
diameter at c than at d, and the nuts are sometimes made conical; and
as the tubes and inside of the nuts are made parallel the nuts become
jammed at c on being screwed in, and make thereby a steam-tight
joint, e are the tubes, shown partly in section.
The tube in Fig. 1 is shewn bent at the end fand is made all in one
piece.
In Fig. 2 the end fis formed of cast metal, cast in the required form
and tapped inside, the tubes e being screwed to fit the end fand screwed
into it making steam-tight joints, thereby forming a substitute for
bending, in cases in which it may be inconvenient or where bending is
undesirable.
Fig. 3 is similar to Fig. 1 with the exception that the holes in the
plate are bored and tapped quite through the plate instead of being
stopped short as in Fig. 1.
Fig. 4 is a plan partly in section, shewing the cylinder with its
surroundings; g, g, g, is all in one casting; a, a, are the tube plates
screwed to the casting; e, e, are the tubes inserted into the tube plates
in the manner herein-before described.
Fig. 5 is a plan, partly in section; g is the cylinder cast in one picce
with the reservoir h. There is no separate tube plate screwed on, but
that which serves as a tube plate is cast in one piece with the cylinder g;
i is the valve box; e, e, e, are the tubes, inserted as in Fig. 1 or 3 and
being bent as shewn in order to bring them together into one furnace,
(to be externally heated thereby) for the purpose of greater compactness
when desirable.
Fig. 6 is a sectional elevation of a cylinder and reservoir. The cylinder
and outer casing being in one casting. The inside top cover of the
cylinder is screwed down to suitable lugs, and spaces are left for
the steam to rise to the dome or steam chest k. The lower inside
cylinder cover is screwed up to similar lugs, and is so made as to
form in conjunction with the bottom cover the stuffing box for the
piston rod.
The tubes in this case are sometimes inserted into suit-
able blocks or provisions made in the casting to receive them, as shewn
in Fig. 7.

page_text: And lastly. The fitting of bent or tubes to the fire-boxes of loco-
motives and other boilers as described.
In witness whereof, wo, the said Thomas Moy and Richard Edmund
Shill, have hereunto set our hands and scals, this Sixteenth day
of September, in the year of our Lord One thousand eight hundred
and seventy-three.
Witness,
WILLIAM SPENCE,
8, Quality Court,
Chancery Lane.
THO. MOY.
(L.S.)
R. E. SHILL. (L.S.)