A NEW METHOD OF HEADING. PINS
Year: 1809

page_text: BUNI
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BUNDY, of Cambden Town, in the Parish of Saint Pancras, and County of
Middlesex, Mathematical Instrument Maker, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-eighth day of
September, in the forty-ninth year of His reign, give and grant unto me, the
said William Bundy, my exors, admors, and assigns, His especial licence, full
power, sole privilege, and authority, that I, the said William Bundy, my oxors;
adñiors, 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 "A NEW METHOD OF HEADING.
PINS;" in which said Letters Patent there is contained a proviso, obliging me,
the said William Bundy, by an instrument in writing under my hand and seal,
to cause a particular description of the nature of my said Invention, and what
manner the same is to be performed, to be inrolled in His Majesty's High
Court of Chancery within six calendar months after the date of the said recited
Letters Patent, as in and by the same, relation being thereunto had, may more
fully and at large appear.
NOW KNOW YE, that in complianco with the said proviso, I, the said
William Bundy, do hereby declare that my said Invention is described and
ascertained in and by the Drawings hereunto annexed, and the following
description thereof, that is to say:-
Fig. 1, A, the frame or stock, made of metal, in which are fitted a pair or
steel dies B, in manner of those generally used for making screws, beld

page_text: together by cylinders C; the dimensions may be various as the quality of
work require. The dies I generally uso are about; two inches long and one
inch square in the prominent parts, which appear at A, Fig. 2, on that side of
each the two dies which come in contact, when in use, after sinking of an uniform
depth, a portion of those surfaces as described B, Fig. 2, to facilitate the fol-
lowing process, are made corresponding grooves, which when pressed together
form holes, each the diameter of the shaft, intended to have the head fixed on
these, holes may be made tapering upwards or contracted at that part close
under the head as at C, Fig. 2, where a portion or half a hemisphere, whose
diameter being that of the size head required is to be worked out; viewing the
lies thus worked, and in the frame A, Fig. 1, which is the position I place
them in while introducing the pointed shafts, each having a head put loosely
on, the upper die being at liberty in the frame, the pressure of its weight will
be found sufficient to hold the number of shafts with their heads in their
respective places, while they are pushed forward with a strait motion until the
quantity of head prevents the shafts from going any farther; in this state it is
necessary to turn the lever D, Fig. 1; to which is fixed a screw E, Fig. 3, for
the purpose of forcing the dies together, which will hold the shafts firm enough
to receive a stroke from a press on the top piece (hereafter described), to secure
and form compleat the whole number of heads in the dies. Fig. 4 describes the
top piece A, the steady pins to fit the holes E,.Fig. 1, which will guide those
hollows or hemispheres that are sunk in Fig. 4, at B, to match the correspond-
ing portion of hemispheres K, Fig. 1; these hemispheres may be finished to
fancy. As respects the ornament or figure of moulding intended for the top of
the head, by sinking them accordingly, I leave a point in the centre of the
cavities in the top piccc, which serves, when forced into the top.of.the.shaft, to
widen it there and form a rivett, and thereby secure the lead firm from coming
off the top of the shaft, and the dies having been hard screwed together with
the lever D, there will be a collar formed by that pressure on the shaft, under
the head, sufficient to prevent the liability of the head-being by any ordinary
means forced down the shaft.
Now having described. the working parts, as in Fig. 1, and admitting the
shafts, each with a head, are pushed into their respective places at K, Fig. 1,
and secured by the screw, Fig. 3, I introduce the steady pins A of the top.
piece, Fig. 4, into the holes E of the die B, Fig. 1, the hemisphere at B in the
top picce, Fig. 4, corresponding with those in the dies at K, Fig. 4; then taking
hold of the frame by the handle F, Fig. 1, and placing the whole in a fly press,
one stroke therewith on the top piece, the strength thereof being regulated
according to the size of the work; will be found sufficient to compleat the

page_text: whole nnmber of heads in the dies. Hitherto it hath been the practice to strike
the head several times, and that on its sides, expecting to fix it on the shaft
while held in a horizontal position, but my method of effectually and securely
fastening the heads on the shafts, and leaving the heads of a superior form is
by placing the shafts in a perpendcular direction, and striking the heads and
shafts on their tops, which I call superior heads, and which method I claim
as my Invention; to succeed in the compleatest manner in forming those
superior heads, it will be necessary that the dimensions of the heads, before
they are fixed to the shafts, should be particularly attended to; if they are
intended, when finished, to be nearly of a spherical figure, they should be prepared
of a greater depth of axis than the diameter, that the diameter may be small
enough to go freely into the hemispheres in the dies and top piece, which
are to receive them for this purpose. Head wire may be made flat, either by
drawing or rolling to a size, so that when spun one or more rounds will
be sufficient for a head. I recommend head wire of a smaller than ordinary
size without flatting, so that when spun, and cut three rounds, it shall contain
the quantity of metal required for the size head intended. When the heads
have been fixed on the shafts by the stroke of the fly press, the screw is then
to be turned back by the lever D, and taking hold of the milled head G, Fig. 1,
which is on the head of the small shaft H, and which goes through the screw E,
Fig. 3, and is fixed to the top die at I, by being screwed hard in the die B, it
may be drawn back to separate the dies sufficiently wide for the superior headed
pins which they contain to fall through into some place prepared to receive
them.
In witness whereof, I, the said William Bundy, have hereunto set my hand
and seal, the Twenty-seventh day of March, in the year of our Lord
One thousand night bundand and ton