CERTAIN MEANS'OR METHODS OF WORKING STEEL OR IRON, OR STEEL JOINED WITH IRON; IN OR INTO TAPER FORMS, WHETHER ROUND OR SQUARE, OR OF ANY OTHER FIGURE IN THE CROSS SECTIONS THEREOF, FOR THE PURPOSE OF MAKING FILES AND VARIOUS OTHER ARTICLES
Year: 1813

page_text: PLIMLEY'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I; CHARLES
PLIMLEY, of Birmingham, in the County of Warwick, Manufacturer, send
greeting.
...
WHEREAS His Most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of His United Kingdom, bearing
date at Westminster, the Twentieth day of February, in the fifty-third year of
His reign, give and grant unto me, the said Charles Plimley, my exors, admors,
and assigns, His especial licence, full power, sole-privilege and authority,
that
I, the said Charles Plimley, my exors, admors, and assigns, during the term of
years therein mentioned, should and lawfully might make, use, exercise, and
vend, within England, Wales, and the Town of Berwick-upon-Tweed; my
Invention of "CERTAIN MEANS'OR METHODS OF WORKING STEEL OR IRON, OR STEEL
JOINED WITH IRON; IN OR INTO TAPER FORMS, WHETHER ROUND OR SQUARE, OR OF
ANY OTHER FIGURE IN THE CROSS SECTIONS THEREOF, FOR THE PURPOSE OF MAKING
FILES AND VARIOUS OTHER ARTICLES;" in which said Letters Patent there is con-
tained a proviso, that if: I, the said Charles Plimley, shall not particularly
describe and ascertain the nature of my said Invention, and in what manner
the same is to be performed, by an instrument in writing under my hand and'
seal, and cause the same to be inrolled in His Majesty's High Court of
Chancery within two calendar months next and immediately after the date of
the said Letters Patent, that then the said Letters Patent, and all liberties
and advantages whatsoever thereby granted, shall utterly cease, determine, and
become void, as in and by the same (relation being thereunto had) may more
fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Charles Plimley, do hereby declare that the nature of my said Invention, and
the manner in which the same is to be performed, are particularly described
and ascertained in manner following (that is to say):-
I do make or provide a pair of rolls or cylinders of iron or steel, or of both
metals, properly cast, forged, or wrought, for rolling or acting upon other
metallic bodies, and in or upon the surfaces or faces of one or both of the said
rolls or cylinders I do form, fashion out, or make certain grooves, or hollows,
or projections, or prominences, either at the time of casting, manufacturing, or
making the said rolls or cylinders, or afterward, as may be most convenient
and suitable to the nature or description of the work intended to be performed
thereby, and of such figures and dimensions respectively with regard to each
other in or upon such roll or cylinder, as that when the said rolls or cylinders
shall be duly placed in a frame with the axis thereof parrallel to each other,
the said grooves, or hollows, or projections, or prominences in or upon one of the
said rolls or cylinders shall be respectively opposite to and corresponding with
the grooves, or hollows, or projections, or prominences in or upon the other
roll or cylinder, or with the plain surface thereof (if plain), so as to leave
between the said grooved, hollowed, projected, or prominent parts of the one
roll or cylinder, and the grooved, hollowed, projected or prominent parts, or
the plain surface of the other, during the regulated rotation of both, a space
or spaces adapted to receive a red-hot bar, or piece of steel or iron, or steel
joined with iron, and give thereto by one compression or by successive com-
pression the taper form intended to be produced in the same. And I do by
preference and most commonly make the said grooves, or hollows, or projec-
tions, or prominences circularly or directly, and not helically or obliquely, round
each of the said surfaces, and of such length as may be required, and I do
make my cylinders or rolls of a due magnitude to admit of such required
lengths; but, nevertheless, in some cases, such as in making of long taper rods,
I do make the said grooves, hollows, projections, or prominences helically or
obliquely, so as to comprehend more than the length of the circumference of
the roll or rolls in or upon which the same may be made. And, further, I do,
in cases wherein the same may be preferred or required, and more particularly
for long taper pieces, make use of a steel or iron, or steel and iron plate, instead
of one of the said rollers or cylinders, and do make grooves, hollows, projec-
tions, or protuberances, as aforesaid, in the said plate or otherwise. I do leave
the said plate plain, and do make grooves, hollows, projections, or protuberances
in the roll or cylinder only, and do operate by causing the said plate to pass

page_text: along in contact with or with pressure against the said roll or cylinder; or the
plate may be fixed, and the roll or cylinder passed backwards and forwards upon
it, so as to produce the like effects as would or might have been produced by
the operation of two rolls or cylinders, in manner before described. And I do
duly place, fix, or set the said rolls or cylinders, or the said cylinder and plate,
in a fit frame of some of the well-known constructions fit for performing the
operations herein-before mentioned or referred to, and do give motion to the
working part by the usual means of millwork or other work for connection
or communication with the power of wind, water, steam, or of men or animals,
as first movers of the same. And, moreover, I do cause the said rollers or
cylinders to move regularly and aptly along with each other by wheelwork, or
by stops, or by chain gear, or by guages for starting the same fairly at the
commencement of every successive operation, or by studs, or locking pieces, or
any other of the usual means and contrivances, for preventing rolls from over-
running each other, in order that the fittings of the said grooves, hollows, pro-.
jections, or protuberances in or upon each roll or cylinder may be constantly.
opposite to and correspond with those in or upon the other, as to the respective
fit places of operation in each, for producing the effect herein-before first
mentioned, and intended, by means of the space or spaces, to be left between
the said rolls or cylinders, or roll or cylinder and plate. And, further, I do
introduce into the said space or spaces, and during the turning of the said
rolls or cylinders, or roll or cylinder and plate, a bar or duly sized piece of
steel or iron, or irou joined with steel, in the state of ignition or red heat, and
do allow the same to pass along with the surfaces of the said rolls or cylinders
or roll and plate, and by that means to obtain the taper form correspondent
with the space or spaces aforesaid. And, lastly, I do declare that I do make.
the said grooves, hollows, projections, or protuberances either wholly in one of
the said rolls or cylinders, or roll or cylinder and plate, leaving the other roll
or cylinder plain, or I do make the same partly in one and partly in the other
of the said rolls or cylinders, or roll and cylinder and plate; provided always
that the said space or spaces shall be such as shall give the requisite and
intended taper figure the said heated bar or duly sized piece of steel or iron, or
of steel joined with iron, as shall or may be introduced therein and wrought as
aforesaid. And, farther, that I do, by the means or methods aforesaid, manu-
facture and make taper bars of round, or square, or triangular, or other
figures, the molds or blades of bayonets, of matchetts, of swords, and of ram-
rods, and other tapered weapons or instruments, and blank for tapered, round,
flat, triangular, and other files, and tapered steel or welded stuff. for coach

page_text: springs and other springs, and various articles and things of the like form or
description.
In witness whereof, I, the said Charles Plimley, have hereunto set my
hand and seal, the Sixteenth day of April, in the year of our Lord One
thousand eight hundred and thirteen.
BARKER, Extra.
Signed, sealed, and delivered (being first
duly stampt), in the presence of
GEO. BARKER.
HENRY M. GRIFFITHS.
AND BE IT REMEMBERED, that on the Sixteenth day of April, in the
year of our Lord 1813; the aforesaid Charles Plimley came before our said
Lord the King in His Chancery, and acknowledged the Specification aforesaid,
and all and every thing therein contained and specified, in form above written.
And also the Specification aforesaid was stampt according to the tenor of the
Statute made for that purpose.
Inrolled the Seventeenth day of April, in the year of our Lord One
thousand eight hundred and thirteen.