AN IMPROVED BRACE FOR THE USE OF CARPENTERS AND OTHERS
Year: 1848

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CARTWRIGHT, of Sheffield, in the County of York, Joiners' Tool Manufacturer,
send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of
Great Britain and Ireland, bearing date at Westminster, the Sixteenth day of
December, One thousand eight hundred and forty-eight, in the twelfth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said John Cartwright, my exors, admors, and assigns, Her
especial licence, full power, sole privilege and authority, that I, the said
John Cartwright, my exors, adññors, and assigns, or such others as I, the
said John Cartwright, my exors, adññors, 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, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed,
my Invention of "AN IMPROVED BRACE FOR THE USE OF CARPENTERS AND
OTHERS;" in which said Letters Patent is contained a proviso that I, the
said John Cartwright, should cause a particular description of the nature of
my said Invention, and in what manner the same is to be performed, by au

page_text: instrument in writing under my hand and seal, to be inrolled in Her said
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.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Cartwright, do hereby declare that the nature of my said Invention,
and the manner in which the same is to be performed, are fully described
and ascertained in and by the following statement thereof, reference being had
to the Drawings hereunto annexed, and to the figures and letters marked
thereon, that is to say:-
My Invention consists of an Improved Brace for the Use of Carpenters
and Others, in which certain parts are cast in metals, and in such manner as
to allow of a moveable handle of horn or other suitable material being used,
and also having a more convenient mode of applying the revolving head, and
a more convenient arrangement for releasing the bits from the spring catch in
the pad. And in order that the Invention may be most fully understood and
readily carried into effect, I will describe the construction of the improved
brace as made according to my Invention.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a side view of a brace made according to my Invention.
Figure 2 shews a section thereof. Figure 3 shews an end view, looking from
below upwards. Figure 4 shews the lower part or pad. Figure 5 a section
of such lower part or pad. The other Figures separate views of some of the
details, and in all the Figures the same letters are used to indicate similar
parts. a, b, c, constitute the metal frame or skeleton of the brace. The
crank parts a and c of the brace are cast, and are connected by the spindle b
which receives the handle of horn or other suitable material. The casting a
constitutes the upper part of the crank of the brace, and the casting c con-
stitutes the lower part of the crank of the brace, having at its lower.part the
pad for receiving the bits. The spindle 6 is square at its upper end, and
has cast upon it the upper part of the skeleton a, the square. part. being
properly prepared, as is well understood, for retaining the square end
secure in the casting. The other end of the spindle I also prefer to have
square where the lower portion c of the crank is cast on it, but in casting on
that end the square is to be prepared properly, as is well understood, for allow-
ing the part c of the brace to be removed, and the spindle is prepared with a
screw and nut to hold all parts together when the brace is complete. The

page_text: parts e, e, which constitute the filling of the frame, may be of horn, gutta
percha, wood, or other suitable material. If of horn or gutta percha these
parts may be accurately made by pressing on the moulds, as is well under-
stood, when moulding articles of these materials. f is the head of the
brace, the lower end of the stem of which enters a bush let into the upper
part of the brace, as is shewn, and the parts are combined together, as is
clearly shewn in the Drawing, so that the stem of the head f may rotate
freely. The head I prefer to make of horn, the application of which material
in making heads for braces being an important improvement in this manu-
facture, but other material may be employed. The bits used with this brace
are retained in the pad by a spring catch g, as is shewn, and in order to move
the spring back so that a bit may be removed, the cap or nozel h is so made
and attached as to move laterally. The handle b¹ I prefer to be of horn,
though other material may be employed. I would state that the details of
the construction may be varied, and I have by Figures 6, 7, 8, 9, and 10
shewn a somewhat different construction, though in substance the same
principle of construction is retained. The upper and lower parts a and b
are castings connected by a stem or spindle for a handle, the chief difference
being that the screw at the end of the spindle b has the part a cast thereon,
the screw being properly prepared to allow of its being unscrewed when
applying the handle b¹. When this arrangement is preferred the screw may
be secured in the part a by a pin driven through. The skeleton frame of this
brace, like the former one, may be filled, and I would state that it is not
essential to the construction that the parts a and c should be open; they may
be solid, as shewn at Figure 11, and the arrangements for holding the bits in
the pad may be as heretofore, or as shewn in this Figure, and in any con-
venient manner.
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 described so long as the peculiar character of my
Invention be retained; but what I claim is the casting of the parts a and c,
and connecting them with a stem or spindle b, for receiving a separate and
moveable handle.
I also claim the mode of constructing and applying the heads as shewn
in Figures 1, 2, & 11.
I also claim the application of horn in the manufacture of heads for braces.
And I also claim the mode of acting on the spring catch by the lateral
movement of the nozel as described.
I also claim the making of the parts e, e, of horn or gutta percha.