AN IMPROVEMENT OR IMPROVEMENTS ON THE INSTRUMENTS OR APPA- RATUS COMMONLY CALLED OR KNOWN BY THE NAME OP VICES
Year: 1836

page_text: LILEN AND UNHAMS ST
TION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
CHALKLEN and THOMAS BONHAM, of Oxford Street, in the County of Mid-
dlesex, Watercloset Manufacturers, send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Fourteenth day of March, in the sixth year of His reign,
did, for Himself, His heirs and successors, give and grant unto us, the said
John Chalklen and Thomas Bonham, His especial licence, full power, sole pri-
vilege and authority, that we, the said John Chalklen and Thomas Bonham,
our exors, adiñors, and assigns, or such others as we, the said John Chalklen
and Thomas Bonham, our exors, adiñiors, 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, our
Invention of "AN IMPROVEMENT OR IMPROVEMENTS ON THE INSTRUMENTS OR APPA-
RATUS COMMONLY CALLED OR KNOWN BY THE NAME OP VICES;" in which said Letters
Patent is contained a proviso, that we, the said John Chalklen and Thomas
Bonham, or one of us, shall cause a particular description of the nature of
our said Invention, and in what manner the same is to be performed, to be
inrolled in His 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, we, the said
John Chalklen and Thomas Bonham, do hereby declare the nature of our

page_text: said Invention, and the manner in which the same is to be performed, are fully
described and ascertained in and by the following description thereof, reference
being had to the Drawing hereunto annexed, and to the figures and letters
marked thereon, that is to say :-
Our Invention consists in the application of certain spherical surfaces to
vices, whereby the strain on the screws is more equally and advantageously
brought into action, as will be hereafter fully described.
DESCRIPTION OF THE DRAWING.
Figure 1 is a side view of a hand vice; Figure 2 is a side view of a bench
vice, having our improvement or improvements applied thereto; Figure 3 is
the screw of the hand vice, shewn separately; and Figure 4 is the washer for
the hand vice, shewn separately. This washer it will be seen, is of a portion
of a sphere, which, lying in a recess formed in the chap of the hand vice,
of the same figure as the washer, and it is the working of these two sphe-
rical surfaces, and the constant adjustment of the bearing thus formed, which
causes the strain to be equal all round the screw. Figure 5 is the screw
and screw box, shown separately, of a bench vice; and Figure 6 is the washer,
of a portion of a sphere, similar to that described for a hand vice. In each
of these Figures the same letters indicate similar parts.
a, a, are the chaps of the vices; b, b, the washers, which, as before stated, are
of a spherical form, and, consequently, whatever position the vices are open
to, the strain on the screws will be equal to all sides, and not on one part of
the circumference only, but all round, owing to the universal joints or bearing
obtained by the spherical figure of the washers 6 and the receiver. In the
chaps a, a, of the vices c, c, are heads or ends, of a portion of a sphere, to
the screw of a hand vice, and to the screw box of a bench vice; these spherical
surfaces also assist in allowing the screws of the vices to have movement, and
thus to adjust themselves to whatever degree the chaps a, a, are opened, and
still retain the parts in such a condition as to insure a direct strain on the
screws, and equally all round their circumference.
Having thus described our Invention, we would have it understood that
what we claim as our Invention is the application of tho spherical surfaces
to vices, as above described.
In witness whereof, we, the said John Chalklen and Thomas Bonham,
have hereunto set our hands and seals, this Thirteenth day of Sep-
tember, in the year of our Lord One thousand eight hundred and
THOMAS (L.S.) BONHAM.

page_text: AND BE IT REMEMBERED, that on the Thirteenth day of September,
in the year of our Lord 1836, the aforesaid Thomas Bonham 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
5 above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Fourteenth day of September, in the year of our Lord One
thousand eight hundred and thirty-six.