IMPROVEMENTS IN MACHINERY OR' APPARATUS FOR CONNECTING METALLIC PLATES FOR THE CONSTRUCTION OF BOILERS AND OTHER PURPOSES
Year: 1845

page_text: GARFORTH'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
GARFORTH, of Dukinfield, in the County of Chester, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at.
Westminster, the Tenth day of December, in the ninth year of Her reign, and
in the year of our Lord One thousand eight hundred and forty-five, did, for
Herself, Her heirs and successors, give and grant unto me, the said James
Garforth, Her especial license, full power, sole privilege and authority, that I,
the said James Garforth, my executors, administrators, and assigns, and such'
others as I, the said James Garforth, my executors, administrators, or assigns,
should at any time agree with, and no others, from time to time and, at all
times during the term of years therein expressed, should and lawfully might
make, usc, excrcise, and vend, within England and Wales, and the Town
of Berwick-upon-Tweed, my Invention of "IMPROVEMENTS IN MACHINERY OR'
APPARATUS FOR CONNECTING METALLIC PLATES FOR THE CONSTRUCTION OF BOILERS
AND OTHER PURPOSES;" in which said Letters Patent there is contained a proviso
that I, the said James Garforth, shall cause a particular description of the
nature of my said Invention, and in what manner the same is to be performed,
to be enrolled in Her Majesty's High Court of Chancery, within, six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more
fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
James Garforth, do hereby declare that the nature of my Invention, and the
manner in which the same is to be performed, is particularly described and
ascertained in and by the Drawings hereto annexed, and the following
explanation thereof (that is to say) :—
My Improvements in Machinery or Apparatus for connecting Metallic Plates
for the Construction of Boilers and other Purposes consist in the direct applica-
tion of the expansive force of steam to the dies for rivetting such plates
together, and in the machinery or apparatus whereby such force is brought
into action, which will be better understood by reference to the accompanying
Drawing, in which Figure 1 represents a plan or horizontal view of an arrange-
ment of machinery or apparatus designed for connecting or rivetting metallic
plates for the construction of steam boilers, and Figure 2 is an end view of
the same; Figure 3 a side view, and Figure 4 a section taken. longitudinally
through about the centre of the apparatus. Similar letters of reference are
marked upon corresponding parts of the apparatus in all the Figures. a, a is
the frame work of the machine supporting the steam cylinder b, b, in which a
steam-tight metallic or other piston c, c, works; this piston c, c, is mounted
upon the rod d, d, which passes out through stuffing boxes c, e, at each
end of the cylinder b, b.. In the end of the piston rod the die f is fixed,
the other die g being mounted in the pillar h, which is fast to the framework,
steam being admitted through the entrance or feed pipe i, passes onwards
through a common slide or other valve k to the cylinder, and after having
performed its office, is allowed to pass out through the pipe 1, the slide valve k
being worked by hand, by means of the lever m, so as to admit the steam on
either side of the piston, as required. The operation of the apparatus is as
follows: Steam of a sufficient pressure being admitted (by means of the slide
valve k) at the back, or, as it appears in Figure 4 of the Drawing, left hand
side of the piston c, c, will force it, together with the piston rod d, d, in the
direction of the arrow, and forms the ends of the rivet n, between the two dies
f and g, thus firmly connecting the plates o and p, thereby producing a perfectly
steam, air, or water-tight joint. The rivetting is effected by the die driven by
the
pressure of the steam upon the piston, the head of the rivet being formed
at one or more blows, as required, the intensity of the blow depending upon
the area of the piston, the length of the stroke. and the pressure of the steam
employed. The valve k is then reversed, admitting the steam in front of the
cylinder, which will withdraw the die f, when another rivet may be put in and
the operation proceed as before.
I would remark, in conclusion, that I do not intend to confine myself to the

page_text: use of steam alone for such purposes, as the direct pressure of water, air, or
other elastic medium may be similarly employed without departing from the
principles of my Invention.
Having now described the nature of my said Invention, and in what manner
the same is to be performed, I wish it to be understood that I do not claim as
my Invention, or the exclusive use of, the several parts of the above mentioned
apparatus when taken separately, or except when employed for the purposes of
my Invention, which I hereby declare to consist in the rivetting of metallic
plates by dies driven by the elastic force of steam, water, or other elastic
medium, as above described.
In witness whereof, I, the said James Garforth, have hereunto set my
Inrolled the Tenth day of June, in the year above written.