Year: 1897

page_text: We CHARLES ROCHOLL, Foreman, and THE WESTMINSTER MANUFACTURING,
COMPANY LIMITED, both of 29A Gillingham Street, Pimlico; London, S.W., do hereby
declare the nature of this invention to be as follows:-
This invention consists in a mode of forming the horn or wheel frames suitable for
pin castors from sheet metal.
In carrying out this invention, a blank of suitable shape is stamped from sheet
metal. This blank is then submitted to the action of dies, by which the following
forms are obtained.
First, the blank is struck up to a U shape; then the sides are driven in so as to
form a cylindrical socket at the bottom of the loop of the U, and the rest of the
blank is shaped to the width necessary to receive the wheel.
To prevent the socket opening, under the strain of the pin, rings or washers are
applied to each end of the cylinder, these rings being loose, or connected together
by a strip which will lie inside the frame and cover the joint.
The pin will be rivetted in the cylindrical socket in the usual way.
We CHARLES ROCHOLL, Foreman, and THE WESTMINSTER MANUFACTURING
COMPANY LIMITED, both of 29A Gillingham Street, Pimlico London S.W. 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 consists in a mode of forming the horn or wheel frames suitable
for pin castors from sheet metal.
In carrying out this invention a blank of suitable shape is stamped from sheet
metal, and is then submitted to the action of dies, by which the requisite form is
ultimately obtained.
In the accompanying drawings we show in the several Figures which will be more
fully described, the various operations through which the metal passes, to produce
the wheel frame according to this invention, thus:
This
Fig. 1 represents the blank A which is stamped from a sheet of metal.
blank is then placed in a suitably shaped die, and its two ends are bent up, so as to
form a U (not shown in the drawing). This U shaped piece is then placed in

page_text: another die, and the sides are driven in, so as to form a cylindrical socket B at the
bottom of the loop, as shown in side elevation and plan view in Figs. 2 and 3.
To prevent the socket opening out at the point a Fig. 3 under the strain due
to the weight of the article of furniture to which the castor will be applied, we adapt
rings Fig. 4 both at top and bottom of the socket, which will firmly hold it in
its proper shape. These rings 6 fit onto the projections c c¹ Fig. 1 which are formed
with the blank for the purpose. The bottom projection c¹ is formed by making
the notches d in the blank and the ring lies in these notches, as will be seen at
Fig. 4 which is a sectional view.
To further strengthen the socket we may employ a suitable metal bush ƒ also
shown at Fig. 4.
Instead of using two separate rings b, we may connect them together by a web g
as seen from the blank Fig. 5. This blank is bent to the U shape shown at Fig. 6.
The length of the part g will be the same as the depth of the socket. This
retaining piece is placed between the arms of the frame, so as to cover the point a,
and the rings are sprung over the ends of the socket B as shown in Fig. 7.
In some cases we may find it convenient to combine the rings and the bush, and
this we effect by having a bush f somewhat longer than the socket, and causing the
ends to curl over outwards and grip the edges of the socket, as shown in Fig. 8
this curling over being effected by dies in a manner similar to that described in the
specification of Letters Patent granted to John Alexander Kennedy McGregor dated
May 22nd 1895 No. 10127.
Fig. 9 shows the completed castor, C being the pin which carries the usual plate h.
The lower part of the pin is inserted in the socket, and the end is rivetted over in
the usual way..
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The mode herein shown and described of constructing the horn or wheel frame
for pin castors.
2. A horn or wheel, frame for pin castors constructed from sheet metal and having
the pin socket in one piece with the wheel supporting arms as set forth.
3. As a new article of manufacture a horn or wheel frame made of sheet metal
with a pin socket integral with the wheel arms, in combination with strengthening
rings or their equivalent, as set forth.
Dated this 10th down of Ontahan 1007