IMPROVEMENTS IN STEAM ENGINES AND BOILERS
Year: 1868

page_text: LETTERS PATENT to William Inglis, of Manchester, in the County
of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN
STEAM ENGINES AND BOILERS."
Sealed the 17th November 1868, and dated the 20th May 1868.
PROVISIONAL SPECIFICATION left by the said William Inglis at
the Office of the Commissioners of Patents, with his Petition, on
the 20th May 1868.
I, WILLIAM INGLIS, of Manchester, in the County of Lancaster,
Engineer, do hereby declare the nature of the said Invention for "In-
PROVEMENTS IN STEAM ENGINES AND BOILERS," to be as follows, that is to
say:-
This Invention has principally for its object, by certain improvements
in constructive details, to render certain kinds of steam engines and
boilers more durable and less liable to get out of order than such
engines and boilers as hitherto constructed.
The improvements also involve increased convenience in constructing
and erecting, together with other advantages.

page_text: The improvements in steam engines are specially applicable to what
are known as "Corliss" engines, and they consist in casting the inner
cylindrical shell separately from the outer shell of the steam jacket and
making a secure and substantial joint between these parts by casting in
separate pieces the ends containing the valve boxes, and in uniting
these several parts by joints running round the cylinder in planes at
right angles to its axis. The piece containing the valve boxes for one
end is turned internally to fit upon the end of the inner cylindrical
shell, and it has a joint face formed at right angles to fit up against a
flange formed on the inner cylindrical shell. The outer shell is formed
with its joint face flush with the flange on the inner shell, and the
joint face of the valve box piece fits up against them both as against
one continuous face. The joint is secured by bolting the valve box
piece to the outer shell. The same arrangement may be adopted at
both ends, or the valve boxes for one end may be cast either with the
inner shell or with the outer shell. The end covers may be cast in
separate pieces or each or either along with the adjacent valve box
piece.
The improved way of making the valve boxes at one or both ends
separate, and uniting the parts by a joint of the kind described, is
applicable to cylinders made without jacket spaces.
The improvements in steam boilers relate to the class of boiler
described in the Specification of certain Letters Patent granted to the
present applicant for "Improvements in Steam Boilers and Engines,"
and dated 9th March 1863, (No. 652), in which kind of boiler the lower
part consists of vertical rows of tubes containing water and placed at a
slight inclination from the horizon. The ends of the tubes are fixed in
casings which communicate with opposite ends of a cylindrical or
other shell above.
The improvements consist in making the end casings in compartments
and in sections, a compartment comprising a single vertical row of tubes,
and a section comprising two such compartments communicating with
each other at the top and bottom. This arrangement insures that each
tube joint shall bear its own share of the strain and no more. The casing
is by preference made of malleable cast iron, each section of two com-
partments being in one casting, and openings are formed in the outer
side opposite each tube for access to clean the tubes, these openings
being covered by plates held by means of bridles and screws, upper

page_text: shells or vessels are made for each section; that is, for each couple of
vertical rows of tubes, and the sections are made so that any number
may be erected together side by side and in communication with each
other. In this way the parts may be made of only one size or at most
of a very few different sizes, boilers of different powers being formed by
combining more or fewer of the sections.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Inglis in the Great Seal Patent Office on
the 18th November 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
INGLIS, of Manchester, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of May, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Inglis, Her special licence that
I, the said William Inglis, my executors, administrators, and assigns,
or such others as I, the said William Inglis, my executors, adminis-
trators, 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 STEAM
ENGINES AND BOILERS," upon the condition (amongst others) that I, the
said William Inglis, my executors or administrators, by an instrument
in writing under my, 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 I, the said William Inglis, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by

page_text: the following statement in writing, reference being
accompanying Drawings, that is to say:-
had
to the
My said Invention has principally for its object by certain improve-
ments in constructive details to render certain kinds of steam engines
and boilers more durable and less liable to get of order than such engines
and boilers as hitherto constructed.
My improvements also involve increased convenience in constructing
and erecting, together with other advantages.
And in order that my said Invention and the manner of performing
the same may be properly understood, I have hereunto appended a Sheet
of explanatory Drawings to be herein-after referred to, and representing
parts of engines and boilers as made with my improvements.
My improvements in steam engines are specially applicable to what
are known as "Corliss" engines, and they consist in casting the inner
cylindrical shell of the cylinder separately from the outer shell of the
steam jacket, and making a secure and substantial joint between these
parts by casting in separate pieces the ends containing the valve boxes,
and in uniting these several parts by joints running round the cylinder
in planes at right angles to its axis.
Figure 1 is a longitudinal vertical section; Figure 2 is a plan partly
in horizontal section; and Figure 3 is a front end elevation partly in
transverse vertical section of a jacketted
"Corliss valve" cylinder as
constructed according to my Invention. There are two cylindrical shells,
an inner one 1, in which the piston p works, and an outer one 2, made
so as to enclose a steam space round the inner one. The valve boxes 3, 4,
for one end of the cylinder are formed in a separate piece 5 which is
turned internally to fit upon the end of the inner cylindrical shell 1
and it has a joint face 6 - 7 formed at right angles to fit up against a
narrow flange formed on the inner cylindrical shell 1. The outer shell 2
is formed with a joint face 6-7 flush with the flange on the inner shell,
and the joint face of the valve box piece 5 fits up against them both as
against one continuous face. The joint 6-7 is secured by bolting the
valve box piece 5 to the flange of the outer shell 2. In the Figures the
cylinder is represented as built up in the same way at both ends, but
if preferred the valve boxes for one end may be cast in the same piece
with either the inner shell 1 or the outer shell 2. The end covers c may

page_text: be cast in separate pieces, as shown in the Figures, or either of them
along with the adjacent valve box piece 5.
Important advantages of my improved arrangements are that the
separate picces may be made of different qualities of cast iron; thus
a very hard quality may be used for the inner cylindrical shell the better
to withstand the frictional wearing action of the piston, whilst softer
kinds may be used for the other parts.
My improved mode of making the valve boxes 3, 4, at one or both
ends separate and uniting the parts by a joint 6-7 of the kind herein-
before described is applicable to cylinders made without jacket spaces,
and this application is shown in longitudinal vertical section in Figure 4,
the same reference numerals being used in this Figure to mark the parts
like or corresponding to those shown in Figures 1 to 3 and herein-before
described.
My improvements in steam boilers relate to the class of boiler
described in the Specification of certain Letters Patent granted to me
for "Improvements in Steam Boilers and Engines," and dated 9th March
1863 (No. 652), in which kind of boiler the lower part consists of
vertical rows of tubes containing water and placed at a slight inclination
from the horizon. The ends of the tubes are fixed in casings which
communicate with opposite ends of a cylindrical or other shell above.
A boiler of this class, but as made with my present improvements, is
shown in longitudinal vertical section in Figure 5, and in front end
elevation in Figure 6, whilst Figures 7 and 8 are enlarged views of
details.
My improvements consist in making the end casings 8, 9, in com-
partments and in sections, a compartment comprising a single vertical
row of tubes 10, and a section comprising two such compartments
communicating with each other at the top and bottom. This arrangement
insures that each tube joint shall bear its own share of the strain and
no more. The casings 8, 9, are by preference made of malleable cast
iron, cach section of two compartments being in one casting, and
openings 11 (Figure 7) are formed in the outer side of each casing
opposite to each tube for access to clean the tubes, these openings being
covered by plates 12 fixed in any convenient way, as for example by
screw bolts as at a in Figures 7 and 8, or by bridles or clips and screws,
as at in the same Figures. Upper shells or vessels 13 are made for
each section, that is, for each couple of vertical rows of tubes 10, and

page_text: the sections are united by means of flanged joints 14 secured by screw
bolts at the bottom of the casings 8, 9, this arrangement admitting
of any number being erected side by side and in communication with
each other. In this way the parts may be made of only one size, or at
most of a very few different sizes, boilers of different powers being formed
by combining more or fewer of the sections.
Having thus particularly described my said Invention, and the manner
in which the same is to be performed, I have to state that I do not
restrict myself to the precise details herein described or delineated; but
that what I believe to be novel and original and claim as the Invention
secured to me by the herein-before in part recited Letters Patent
is,
1. The constructing of the cylinders of four-valved steam engines in
separate parts arranged and adapted to each other substantially in the
improved manner herein-before described.
And, 2. The constructing of steam boilers comprising vertical rows
of inclined tubes containing water in compartments and sections
substantially as herein-before described.
In witness whereof, I, the said William Inglis, have hereunto
set my hand and seal, this Seventeenth day of November,
in the year of our Lord One thousand eight hundred and sixty-
eight.
TITTY
STAT TO
AM INGLIS.
(u.s.)