IMPROVEMENTS IN THE MAKING OF SCREWS FOR COL- LAPSIBLE AND OTHER VESSELS
Year: 1852

page_text: LETTERS PATENT to Francis William Ellington, of Drummond
Street, Euston Square, in the County of Middlesex, for the
Invention of "IMPROVEMENTS IN THE MAKING OF SCREWS FOR COL-
LAPSIBLE AND OTHER VESSELS."
Scaled the 9th March 1853, and dated the 29th November 1852.
PROVISIONAL SPECIFICATION left by the said Francis William
Ellington at the Office of the Cominissioners of Patents, with
his Petition, on the 29th November 1852.
1, FRANCIS WILLIAM ELLINGTON, of Drummond Street, Euston
Square, in the County of Middlesex, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN THE MAKING OF SCREWS FOR
COLLAPSABLE AND OTHER VESSELS" to be as follows:-
Heretofore, in making such descriptions of screws, it has been
usual to employ solid dies and forcers: this Invention consists of
making the dies and forcers each of two or more parts, to facilitate
the removal of the screws made thereby.

page_text: SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Francis William Ellington in the
Great Seal Patent Office on the 28th May 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
FRANCIS WILLIAM ELLINGTON, of Drummond Street, Euston Squaro,
in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of November,
in the year of our Lord One thousand eight hundred and fifty-two,
in the sixteenth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Francis William
Ellington, Her special licence that I, the said Francis William
Ellington, my executors, administrators, and assigns, or such others
as I, the said Francis William Ellington, my executors, administra-
tors, 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 "IMPROVE-
MENTS IN THE MAKING OP SCREWS FOR COLLAPSIBLE AND OTHER
VESSELS," upon the condition (amongst others) that I, the said
Francis William Ellington, by an instrument in writing under my
hand and scal, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be per-
formed, 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 Francis William Ellington, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):-
Heretofore, in making such description of screws, it has been
usual to employ solid dies and forcers; this Invention consists of

page_text: making the dies and forcers each of two or more parts, to facilitate
the removal of the serews made thereby. And in order that my
said Invention may be most fully understood and readily carried
into effect, I will proceed to describe the means pursued by me.
DESCRIPTION OF THE DRAWING.
Figure 1, shows a plan of the dies used by me; Figure 2, is an
elevation in section; Figure 3, is a plan having the cover removed;
Figure 4, shows a forcer; Figure 5, shows one of the collapsible
vessels previous to its having a screw made on the outside of the
neck, and also one of such vessels after the screw has been produced;
and Figure 6, is a plan of the two parted dies; a is a cylinder which
receives the screw making die b, b, which is in two parts; but it may
be made of more parts if desired. These two parts, when they are
at the bottom of the cylinder a, come correctly together, and act
as if they were one solid die. But after a screw has been made
therein by the descent of the forcer, the ascent of the forcer will
cause the two parts of the die b, b, to rise with the collapsible vessel
and the forcer, by which the two parts of the die 6 will be separated
as they rise up within the cylinder a, by the fixed inclines c, c, by
which means the screw made in such dies will be delivered from
between them, and thus will the act of unscrewing the necks of
the vessels from the die, which was heretofore requisite, be rendered
unnecessary.
I will now describe the manner of constructing and using forcers
of parts in order to produce internal screws. Figure 7, shows a
forcer consisting of five parts; Figure 8, is a plan when expanded
to its largest diameter; Figure 9, is a plan when contracted to its
smallest diameter; Figure 10, is a longitudinal section; Figure 11,
is an underside view of the forcer; and Figure 12, is the form of
cap it makes with an internal screw. In making this forcer the
screw is formed when it is in the expanded state, so that it offers a
true cylinder of metal; a, b, c, d, are the four parts which have
the screw cut thereon, and they have a tendency at all times to
contract when permitted so to do by the pressure of the spring

page_text: ring e, and the parts a, b, c, d, are caused to expand into their
largest diameter by the pressure of the internal forcer f, when it is
forced down by a screw or other press. The metal for a cap is
put into a bed dic, and the forcer is brought down and expanded
by the interior forcer. The cap, previous to having a screw formed
in the interior, is, first made nearly to the form required, leaving the
interior screw only to be produced by the expanding forcer.
Having thus described the nature of my Invention, and the
manner of performing the same, I would have it understood that
I do not confine myself to the details as herein shown and described,
as the same may be varied without departing from my Invention ;
but what I claim is, the manufacture of screws to collapsible vessels
by employing dies and forcers, each of two or more parts.
In witness whereof, I, the said Francis William Ellington, have
hereunto set my hand and seal, this Twenty-eighth day of
May, in the year of our Lord One thousand eight hundred
and fifty-three.
Witness,
J. G. TONGUE.
F. W. ELLINGTON. (L. s.)