IMPROVE. MENTS IN THE CONSTRUCTION OF STEAM GENERATORS, APPLICABLE ALSO TO THE CONSTRUCTION OF CONDENSERS, THE HRATING OF WATER GENERALLY, AND TO THE WARMING OF BUILDINGS
Year: 1864

page_text: LETTERS PATENT to John Henry Johnson, ot 47, Lincoln's Inn Fields,
in the County of Middlesex, Gentleman, for the Invention of "IMPROVE.
MENTS IN THE CONSTRUCTION OF STEAM GENERATORS, APPLICABLE ALSO TO THE
CONSTRUCTION OF CONDENSERS, THE HRATING OF WATER GENERALLY, AND TO
THE WARMING OF BUILDINGS."-A communication from abroad by Joseph
Harrison, the younger, of the City of Philadelphia, in the State of
Pennsylvania, United States of America, Engineer.
Sealed the 30th September 1864, and dated the 8th June 1864.
PROVISIONAL SPECIFICATION loft by the said John Henry Johnson at
the Office of the Commissioners of Patents, with his Petition, on the
8th June 1864.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of
Middlesex, Gentleman, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM GENERATORS, APPLICABLE ALSO
TO THE CONSTRUCTION OF CONDENSERS, THE HEATING OF WATER GENERALLY, AND TO
THE WARMING OF BUILDINGS," a communication to me from abroad by Joseph
Harrison, the younger, of the City of Philadelphia, in the State of Penn-
sylvania, United States of America, Engineer, to be as follows:-
This Invention relates to certain improvements in the formation or manu-
facture of the "units of construction" employed in the construction of steam
generators described in the Specification of Letters Patent granted to John
Henry Johnson on or about the Thirtieth day of August 1859, No. 1970, and
037

page_text: consists, firstly, in making such "units of construction" from malleable metals
of any suitable kind by stamping them by the aid of suitable dies and matrices
in lieu of casting the same. In carrying out this part of the Invention the
two halves of the " units of construction," whether composed of one, two, or
more globular chambers, are stamped separately, and then secured together
by welding, rivetting, bolting, brazing, or otherwise, a flange or projection
being left round the junction edges or largest diameter of each half to
facilitate the uniting of the same.
Secondly, it is proposed to make the " units of construction" (whether
such "units" care cast in moulds or stamped) so as to comprise three or more
chambers in a row, with the view of having a double overlap for breaking
joint in the building up of a boiler with such units. By these means greater
strength is obtained in boilers built up of such units, as at each overlap there
will always be at least two chambers and two through bolts in a direct line to
withstand the strain upon the overhanging or projecting portion of such
overlap unit.
Both parts of this Invention are applicable not only to steam generators,
but also to the construction of condensers, boilers, and hot-water apparatus,
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Henry Johnson in the Great Seal Patent Office
on the 5th December 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of June in the year of our Lord
One thousand eight hundred and sixty-four,in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Henry Johnson, Her special license that I, the said John
Henry Johnson, my executors, administrators, and assigns, or such others
as I, the said John Henry Johnson, my executors, administrators, or
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 Inven-
tion for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM GENERATORS, APPLICABLE

page_text: ALSO TO THE CONSTRUCTION OF CONDENSERS, THE HEATING OF WATER GENERALLY,
AND TO THE WARMING OF BUILDINGS," a communication to me from abroad by
Joseph Harrison, the younger, of the City of Philidephia, in the State of
Pennsylvania, United States of America, Engineer, upon the condition
(amongst others) that I, the said John Henry Johnson, my executors or
administrators, by an instrument in writing under my hand and seal, or
under the hand and seal of one of them, 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 John Henry Johnson, do hereby declare
the nature of the 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 accompanying Drawings, and to the
letters and figures marked thereon, that is to say:-
The said Invention relates to certain improvements in the formation or
manufacture of the "units of construction" employed in the construction of
steam generators described in the Specification of Letters Patent granted to
John Henry Johnson on or about the 30th day of August 1859, No. 1970,
and consists, firstly, in making such" units of construction" from malleable
metals of any suitable kind by stamping them by the aid of suitable dies and
matrices in lieu of casting the same. In carrying out this part of the Inven-
tion the two halves of the " units of construction," whether composed of one,
two, or more globular chambers, are stamped separately, and then secured
together by welding, rivetting, bolting, brazing, or otherwise, a flange or pro-
jection being left round the junction edges or largest diameter of each half
to facilitate the uniting of the same.
Secondly, it is proposed to make the " units of construction" (whether such
"units" are cast in moulds or stamped) so as to comprise three or more
chambers in a row with the view of having a double overlap for breaking
joint in the building up of a boiler with such units. By these means greater
strength is obtained in boilers built up of such units, as at each overlap there
will always be at least two chambers and two through bolts in a direct line
to withstand the strain upon the overhanging or projecting portion of
such overlap unit.
Both parts of this Invention are applicable not only to steam generators,
but also to the construction of condensers, boilers, and hot-water apparatus.
And in order that the said Invention may be fully understood, I shall

page_text: now proceed more particularly to describe the same, and for that purpose
I shall refer to the several Figures on the Sheet of Drawings hereunto
annexed, the same letters of reference indicating corresponding parts in all
the Figures.
Figs. 1, 2, 3, 4, and 5, of the annexed Sheet of Drawings have reference to
the first part of my Invention. Fig. 1 represents a mode of forming the
"units of construction" by stamping by the aid of a die A and matrix B, in
lieu of casting such units of construction as heretofore practised. In this
case a malleable metal is of course employed, the two halves a of a unit shewn
in Fig. 2 being stamped up separately, as shewn in Fig. 1, and then united
or joined together at b, (see Fig. 3), so as to form a complete unit,
whether such unit be composed of a single sphere, as in Fig. 3, or of two,
three, or more spheres, as shewn in elevation and plan at Figs. 4 and 5
respectively. Various means may he adopted for uniting together the two
halves of the "unit," but I have found that the joint shewn in Fig. 3 answers
well in practice; it consists of a small flange c (Fig. 2), stamped upon the
rim of one of the two halves, and a socket d (Fig. 2). stamped upon the rim
of the opposite half of the unit, the flange c fitting accurately inside the
socket, and then being secured therein by turning inwards the edges of the
socket so that they will overlap the flange c, and thereby lock the two halves
together, as shewn clearly at b, in the sectional elevation, Fig. 3.
The second part of the said Invention is illustrated by Fig. 6, which repre-
sents two forms of the improved "unit of construction," built up so as to
constitute a portion of a steam generator, condenser, or hot-water apparatus,
as required. This improved "unit" consists of three or more spherical or
globular chambers, cast or stamped together in one row. C represents an
improved "unit" composed of one or more rows of three globular chambers
a, a, a, cast together, and D represents a "unit" composed of one or more
rows of four globular chambers a cast together. Figs. 4 and 5 also serve to
illustrate this part of the Invention by representing the improved unit of four
chambers in a row made by stamping, as herein-before described. By the
use of these improved "units" a double overlap is obtained when breaking
joint in the building up of a boiler therefrom.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and
original, and therefore claim as the Invention secured to me by the herein-
before in part recited Letters Patent is,―
First, the manufacture of the "units of construction," whether composed of

page_text: one, two, or more globular chambers, suitable for the erection of steam
generators, condensers, boilers, and hot-water apparatus, by stamping them
in halves from malleable metals, and joining the stamped portions in any
suitable manner.
Second, the making of the "units of construction" so as to contain three
or more globular chambers in a row, whether such "units" be produced by
casting or stamping, substantially in the manner and for the purposes herein-
before described.
In witness whereof, I, the said John Henry Johnson, have hereunto
set my hand and seal, the Fifth day of December, One thousand eight
hundred and sixty-four.
J. HENRY JOHNSON. (L.S.)