Improvements in or relating to the Mode of Connecting Parts of Castors and Affixing the same to Metallic Bedsteads and other Analogous Articles.
Year: 1887

page_text: Date of Application, 9th Dec.. 1887
Specification Accepted, 1st June, 1888
Improvements in or relating to the Mode of Connecting Parts of
Castors and Affixing the same to Metallic Bedsteads and other
Analogous Articles.
I, FREDERIC DAVIS, of 230 Great Lister Street, Birmingham, Brassfounder, do
hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:-
My invention has reference as herein after described for "Improvements in or
relating to the mode of connecting parts of castors and affixing the same to metallic
bedsteads, and other analogous purposes to which castors may be applied" by means of
which the aforesaid articles are much simplified in the processes of their manufacture
and the articles produced are stronger and more durable than those made by the
ordinary methods of manufacture.
Hitherto Castors of the following kinds (that is to say) that class of Castor known
as Ball Castors for furniture have been constructed in the following manner :-
The Frame or upper cup which receives the action either roller ball or cap or action
now being used and upon which the rotating ball of the castor finds its bearing, has
been connected to the open ended cup which contains the ball and holds it in position
by means of the said parts being screwed externally and internally and sometimes
by the employment of small screws from the outside and passing through both the
said parts are thus secured, and sometimes by soldering the said parts together; the
upper cup is provided with a screw peg when to be applied to bedsteads or articles
of wood and a jagged or rough peg if required to be applied to bedsteads of iron
by the process of chilling. In socket castors the socket has been connected to the
open ended cup by means above described.
The class of castor known in commerce as horn castors are of three kinds, viz. :
one in which the horn is connected to the socket by means of a pin or pivot upon
which the said horn rotates, the said socket being secured to the articles of furniture
by screws. 2nd. The horn is connected to a plate by means of a pin or pivot upon
which the said horn rotates; this plate is provided upon its surface with a screwed

page_text: Fig. 7 is a view in elevation of a Ball Castor complete to the leg of an Iron
bedstead the parts being connected together as taken from the chill or mould as
Fig. 2.
Fig. 8 is a view in elevation of a ball socket Castor complete the socket being
formed and the parts being connected together as taken from the chill or mould as
Fig. 4.
Fig. 9 is a plan view of one side of a mould or chill constructed according to
my Invention shewing the mode of forming the socket (as Fig. 3 No. 2 Sheet of
Drawings) but having the horn and bowl therein in place of the upper cup and
action and the open ended cup which receives the ball as before described and
illustrated.
I here propose to lay the bowl and the pin upon which it rotates and the pin or
pivot upon which the horn works in the said chill or mould and by pouring in the
molten metal from the socket, and permanently fasten it to the pin or pivot and also
form the horn upon the said pin or pivot so that it will work thereon and also secure
the pin upon which the bowl works to the horn.
The above description describes my Invention in forming the Castor if the plate
with screw is substituted for the socket.
In some cases I may prefer to form the parts detached by the use of the moulds or
chills and then connect them by the means as now employed.
The same letters of reference denote like or corresponding parts upon each figure
where they occur.
a is the mould or chill, b is the locks by means of which it is held together, when
in application.
c, is the frame or upper cup, d, the open ended cup holding the ball e, f the
projecting edge "g" the screwed or jagged peg, h the leg of an ordinary iron
bedstead, the socket j is the core or bearing laid in which forms the socket i,
hollow m is the horn, n the pin or pivot upon which m, works. o is the bowl,
and p, the pin upon which o, works, as hitherto.
When the parts shewn detached in Figs. 5 and 6 are placed together and laid in
the mould or chill as shewn respectively in Figs. 2 and 4 the two parts of the said
mould being placed together the molten metal is poured in at the gate, g, which
surrounds or covers the said parts and they are firmly held together the molten metal
as indicated in Figs. 2 and 4 by the cross lines.
I would observe in conclusion that I do not limit myself to the precise details
herein given and set forth as various modifications may be made without departing
essentially from the principle of this my said Invention.
Having now described and ascertained the nature of this my said Invention and
in what manner the same is to be performed, I declare that what 1 claim is :-
1st. The construction and application of a mould or chill in two or more parts
suitably locked together as Figs. 1 and 2 in which the parts of Castor as c. d. e. g.
and leg of bedstead as Fig. 5 has been placed as shewn in Fig. 2 the said mould or
chill having the gate q through which the molten metal is poured covering f, the
projecting edge (or its equivalent the pins or projections) and c. g. and end of h.
securely connecting them together as shewn in Fig. 2 in the mould or as Fig. 7,
when removed from the mould as herein before described and illustrated.
2nd. The construction and application of a mould or chill as described in the first
claim in which the parts of a Castor as c. d. e. Fig. 6 has been placed as shewn in
Fig. 4, the said mould or chill having a gate q through which the molten metal is
poured covering the projecting edge and c. casting or forming the socket i and
securely connecting them together as shewn in Fig. 4 in the mould, or as Fig. 8
when removed from the mould as herein before described and illustrated.

page_text: 3rd. The construction and application of a mould or chill as described in the first
claim. In this case I place or lay in the said mould the bowl o and the pin p, and
the pin or pivot and the core or bearing j, the molten metal is poured in at the gate
casting or forming the socket permanently to n, and the horn m loose upon n, and
loose upon p, so that both will work in the desired direction as herein before described
and illustrated.
4th. The construction of the said parts (as above described in the first claim but
detached or separate, and then connected together by rivetting in a well known
manner, as herein before described.
5th. The construction of the said Castors or parts forming Castors together as
above described by the employment of moulds of sand as an alternative to the metal
moulds or chills as herein before described.
6th. The construction, combination, and arrangement of parts the whole forming
Improvements in or relating to the mode of connecting parts of Castors and affixing
the same to metallic bedsteads and other analogous purposes to which Castors may be
applied."
THOMAS KENDRICK,
Agent.