Improvements in Furniture Castors.
Year: 1891

page_text: Date of Application, 27th Jan., 1891
Complete Specification Left, 21st Apr., 1891-Accepted, 23rd May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Furniture Castors.
We, MATTHEW HAYES, of 7, Bradford Lane, Foreman Pipe Layer, and
ALBERT GREGSON, of 42, Willow Street, Bookkeeper, both in Bradford, in
the County of York, do hereby declare the nature of this invention to be as
follows
This invention relates to an improved construction of furniture castor, more
especially applicable to the legs of tables, chairs, pianofortes and the like, the
object being to prevent the wearing loose of the castor.
It is well known that the fastening screws of castors having a cup or socket often
work loose and the castors consequently come off from the article of furniture; now
we obviate this defect, according to our invention, by providing the inner circum-
ference of the castor cup with a screw thread, the article to which it is to be applied
being correspondingly screw threaded. The thread may be formed in the cup by
means of a screw cutting lathe, or otherwise, and, if a sharp V form be given to.
the said thread, the threading of the article to which it is applied, if of wood, may
generally be dispensed with. We prefer to retain the old side screws in the cup to
give extra hold.
Dated thin 27th day of January 1201
CROSSLEY & Co.,
72, New Market Street, Bradford, Yorks, Agents.
COMPLETE SPECIFICATION.
Improvements in Furniture Castors.
We, MATTHEW HAYES, of 7, Bradford Lane, Foreman Pipe Layer, and
ALBERT GREGSON, of 42, Willow Street, Bookkeeper, both in Bradford, in the
County of York; do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to an improved construction of furniture castor more
especially applicable to the legs of tables, chairs, pianofortes, and the like, the
object being to prevent the wearing loose of the castors.
It is well known that the fastening screws of castors having a cup or socket often
work loose and the castors consequently come off from the article of furniture; now
we obviate this defect, according to our invention, by providing the inner circum-
ference of the castor cup with a screw-thread; the article to which it is to be applied
being correspondingly screw threaded. The thread may be formed in the cup by
means of a screw cutting lathe, or otherwise, and, if a sharp V form be given to the
said thread, the threading of the article to which it is applied, if of wood or similar
material, may generally be dispensed with. We prefer to retain the old side screws
in the cup to give extra hold.
In the drawings accompanying this specification,-Figs. 1 and 2 show, in elevation,
furniture castors constructed according to our invention, Fig. 2 being partly in
section. Figs. 3 and 4 are plans of two forms of cup or socket for same.
A is the cup or socket, and B represents the screw-thread, formed therein
preferably by turning in.a screw cutting lathe. The thread B, for the purpose of
this invention, should be of a sharp V form and need only be continued partly
down the socket, as shown on the drawings. A castor having a thread of this sort

page_text: :
may be screwed on by hand, if the article to which it is applied be of soft wood
for instance; or the article, if of harder material, may be correspondingly screw-
threaded we have, however, found. it more suitable, in practice, to apply the
castor to the article of furniture by means of a spanner, key, or like instrument,
without threading the article and, in order to facilitate the application, we construct
the socket with a suitable number of flat sides or parts, say six or eight, which
may be conveniently formed on the rim C, as shown. The spanner or other
instrument is allowed a firmer grip on the socket by these means, and at the same
time a more ornamental appearance is given to the rim or other part of the socket
on which the said sides may be arranged. One or more holes D'is or are provided
in the socket, for the reception of side screws, as an extra precaution against the
working loose of the screw B. As may be seen, from the above description, the
invention is adaptable to ordinary or existing cup castors.
According to a modification, we may construct the socket with an inner circum-
ferential rim or piece of a metal of different nature to that of the other portion of
the castor for example, the socket may be of brass or gun-metal and the inner
piece of iron or steel, joined together by any well known method. The screw
thread B may then be formed on this inner piece by turning, or the thread may
have been previously cast thereon.
In castors constructed according to our invention, from the extra rigidity given
to them by our mode of fixing, or strain on the horn or other part of the castor is
obviated, as they never work loose, but the weight of the article of furniture is
evenly distributed over each part of the castor.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :--
'The construction of furniture castors, substantially in the manner and for the
purposes described and as shown on the drawings.
Data: 0011
1
CROSSLEY & Co.,
72, New Market Street, Bradford, Yorkshire, Agents.