AN IMPROVEMENT OR IMPROVEMENTS ON CASTORS
Year: 1816

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
BARRON, of Wells Street, Oxford Street, in the County of Middlesex, Brass
Founder, send greeting.
WHEREAS His most Excellent 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-third day of
January, in the fifty-sixth year of His reign, give and grant unto me, the
said James Barron, my exors, adñiors, and assigns, His especial licence, full.
power, sole privilege and authority, that I, the said James Barron, my exors,
adors, 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 "AN IMPROVEMENT
OR IMPROVEMENTS ON CASTORS;" in which said Letters Patent there is con-
tained a proviso obliging me, the said James Barron, by an instrument in
writing under my hand and seal, to cause a particular description of the
nature of my said Invention, and in what manner the same is to be per-
formed, to be inrolled in His Majesty's High Court of Chancery within two
calendar months next and immediately 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 compliance with the said proviso, I, the said
James Barron, do hereby declare that the nature of my said Invention consists
in the manner of more firmly than usual securing the fixing of the pivot to

page_text: the bottom of the socket box or plate of the castor, and in lessening the
friction between the horn or claw and the socket of socket castors, the
box of claw castors and the plate of plate castors of all descriptions which are
used for tables, chairs, and other furniture. To render more secure the
fastening of the pivot to the bottom of the socket box or plate of the castor, I
form the pivot with a projecting rim, against which rim the bottom is rivetted
or otherwise fastened.. The under side of this rim forms one of the bearings
against which the top of the horn acts. To lessen the friction I make a sunk
or hollow space between two distinct bearings or rims, the rim of the pivot
being one and the outer rim (either on the bottom of the socket box or plate,
or on the top of the horn or claw,) being the other. These two improvements
in the construction of castors are the whole of what I claim as my own
Invention.
The Drawings and descriptions annexed hereto are designed to shew
different ways in which those improvements. are applied in the construction of
castors, observing that if the top of the horn or claw is brass the parts at the
bottom of the plate socket or box, which the horn or claw works. against, I
make of iron or other metal which has not a tendency of adhering to brass;
and, on the contrary, if the bottom of the plate socket. or box is brass, the
parts on the horn or claw which work against the said plate socket or box I
make of the said contrary metal. The same letters denote the same parts in
each of the said Drawings or sections:
Fig: 1 shews a round' socket castor complete on my principle; a, a; the outer
rim of iron or steel; b, b, the liollow space; c, c, the rim of the pivot'; d, the
horn made in the usual manner: Fig. 2 shews the-section of Fig: ll without the
horn and roller, a, a; the-rim; b; b,, the hollow or groove; c, the rim of pivot.
Fig. 3; the pivot with a rim c; c. Fig. 4; the outer rim a, a, of iron or steel
to be fixed even; or nearly even, with the edge of the bottoni of the sockett.
Fig. 5; an iron or steel bottom with raised' rim, which may be used instead of
rim Fig: 4. Fig. 6: is a section of a socket differently made, with a pivot; a; a,
the outside rim of brass left raised in turning the bottom of the socket; b; b;
the hollow space between the above rim and the rim of the pivot. Fig: 7 is
the horn or claw, with a roller for socket Tig. 6; the top of the horn or claw
being of brass, with a rim or plate of iron or steel A let in and fixed even with
the brass part of the top of the horn or claw. Fig. 8 shews a common socket,
such as have been usually made, with a pivot on my principle fixed in it; b, b, is
the bottom of brass left level in turning; c, c, is the-rim of the pivot, which
rim is rivetted or otherwise fastened against the bottom of the socket.
shews the form of the top of the horn or claw for castor Fig. 8:
Fig. 9
asa; the

page_text: iron or steel rim or plate, fixed even, or nearly even, with the edge of the horn
or claw, of such thickness as to form a correspondent bearing with the rim of
the pivot. Fig. 10, the rim or plate before it is fixed on the top of the horn
or claw Fig. 9. Fig. 11, a plate of iron or steel with a raised rim. This may
be fixed on the top of the horn or claw, and used instead of rim Fig. 10. I also
make horn or claw of brass with a hollow or sunk space on the top between
the inner and outer bearings to suit a socket with a plain iron or steel bottom.
Fig. 12 shews the application of my improvements to a claw castor. By claw
castors I mean of all descriptions of plain or fancy patterns used for claws of
tables and other furniture. Fig. 13 shews the application of my improvements
to a square socket castor. My improvements are also applied in a similar
manner to plate castors.
In witness whereof, I, the said James Barron, have hereunto set my
hand and seal, the Twenty-second day of March, in the year of our
Lord One thousand eight hundred and sixteen.