Improvements in Castors, and in the Manufacture of the same.
Year: 1894

page_text: Date of Application, 18th Dec., 1894
Complete Specification Left, 8th Aug., 1895-Accepted, 14th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Castors, and in the Manufacture of the same.
We WILLIAM HENRY JOHNSON of back of 118 Tower Street Birmingham
Fitter and ARTHUR HUGH ADCOCK of 21 Aston Lane Birmingham Solicitor
do hereby declare the nature of this invention to be as follows:-
Our invention has for its object improvements in castors and in the manufacture
of the same whereby the castors are more cheaply manufactured and last much
longer than the present ones.
The present mode of making castors is to cast the jaws which form the portion
between which the roller is placed and has its axis the screwed stem which attaches
the castor to the article to which it is intended being placed loosely through an
aperture & to allow the castor to revolve and to keep the jaws and the screwed
stem together a washer is placed upon the bottom extremity of the stem after which
this extrematy is flattened by blows which widens it and so prevents the washer
from coming off, this necessitates two or three processes, and very often owing to
defective washers they break or the striker striking too hard breaks the washers.
Now by our invention we do away with these different processes in the following
manner instead of a clear hole being formed in the jaw we form either by casting
or otherwise a projection upon the underneath part of the jaw piece this is hollow
and answers the same purpose as the present hole but is closed at the extremity,
the screwed stem is made much like the present one but has a knob formed on the
end which when inserted in the beforementioned hollow rests upon the bottom.
When the stem is thus inserted the whole is placed in a press which would be
adjusted to just the right gauge to give the pressure needed to tightly nip the
outward side of the projection containing the knob of the stem and so causing the
metal to clip around the knob of the screwed stem thus holding it in the same
loose way as the washers in the present case but more securely but as will be seen
only one process is required and there is no liability of any breakage whilst so
made will last a considerably longer time in actual wear.
Dated this 17th day of December 1894.
WILLIAM HENRY JOHNSON.
ARTHUR HUGH ADCOCK.
COMPLETE SPECIFICATION.
Improvements in Castors, and in the Manufacture of the same.
We, WILLIAM HENRY JOHNSON, of back of 118 Tower Street, Birmingham,
Fitter, and ARTHUR HUGH ADCOCK, of 21 Aston Lane, Birmingham, Solicitor,
do hereby declare the nature of our said invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement :—.
Our invention has for its object improvements in castors and in the manufacture
of the same whereby such castors are better adapted to their work and are more
easily manufactured and they are more enduring.

page_text: In order that our invention may be better understood we have appended hereto
a sheet of drawings upon which two examples of the application of our invention
are illustrated.
Figure 1., shows the leg E of any piece of furniture with one of our castors fixed
to the same.
Figure 2., is a vertical sectional elevation of the same.
Figure 3., is a back elevation of Figure 1.
Figure 4., is a part section and part elevation of a castor applied to the metal
leg E of a bedstend.
Figure 5., is an enlarged section and part elevation of a similar castor to that
shown by Figure 4 but separated from the leg E.
Figure 6., is a part section and part elevation of a modification of castor of
suitable design to be made from cast iron or steel.
The pivot portion A of the castor is fastened to the leg E by any suitable
screw a terminating with the flange or collar a³ or the well known socket may be
formed to receive the leg E. The pivot portion A terminates at a with a curved
or extended bottom and a little above this termination the narrowed neck part a*.
The castor frame B which carries the usual roller Ris formed with the extension b²
upon the internal portion of which extension the lower portion a' of the pivot
piece A rests. The upper part of the pivot A also takes a good bearing against
the inner portion of B at 6' which maintains the entire frame B very steadily and
firm. Before the portion B is placed upon the pivot A there are not indentations 4*
as these are formed after the two parts A and B are brought together by means of
a suitable tool pressing the external portion of B at so making either one two or
more indentations 6 or a continuous indentation. This indentation 63 is principally
for the purpose of maintaining the portion B on the bearing A when the piece of
furniture is lifted. Figures 1, 2 and 3 illustrate the part B as made or cast from
such like metal as brass which allows the indentation 6 to be bent after casting.
In commoner castors such for instance as would be used for common iron bedsteads
the part B may be of cast iron or steel as shown at Figure 6 and the boss of
enlargement b'is provided in which a screw or peg S is inserted the point of which
enters the groove in the pivot part A or instead of this a bush K may be used of
flexible metal such as brass in the cast iron part B which will allow of the inden-
tation being formed in it after the parts are brought together. We have thus
no rivet or washer or loose portions as in ordinary castors and we obtain a long
and substantial bearing surface thus lessening the leverage on the pivot part A
and frame B without complication of parts. It will be obvious that we do not
confine ourselves to the particular design of castor shown as this may be greatly
varied without departing from the principal of our invention.
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 improvements in castors and in the manufacture of the same of the part B
surrounding and containing the pivot A and closed at upon the neck a¹ or its
equivalent S substantially as and for the purpose herein set forth and as illustrated
by all the figures on the drawings.
Deted this 6th day of Angust. 1895