Improvements in the Construction of Runners for Castors and other purposes.
Year: 1893

page_text: Date of Application, 29th Apr., 1893
Complete Specification Left, 29th Jan., 1894-Accepted, 21st Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Runners for Castors and other
purposes.
I MAURICE LACHMAN of St. Georges Club, Hanover Square in the County of
London, Gentleman, do hereby declare the nature of this invention to be .as
follows:
:-
This invention consists in a simple mode of constructing runners for furniture
castors and other purposes.
In carrying out this invention, the runner is formed in two parts, which are-
stamped out of a metal plate. One part consists of one side with the rim, and the
other part consists of the other side with an annular flange of such a diameter as to
fit tightly into the rim portion.
The rim portion is heated, so that it will open out by expansion; the flange of
the side portion is then inserted in the open rim portion, and the completed runner
is allowed to cool, when it will be found that the rim portion will have contracted.
onto the flange, and have gripped it firmly.
A spindle is then driven through the runner, and the runner is complete.
I prefer that the manufacture of these runners shall proceed automatically, for
which purpose the rim portions are placed with the open part upwards on a.
continuous travelling table, which passes through a suitable heating apparatus. On.
issuing from the heating apparatus, the rim portions are presented to a shoot con--
taining the flanged sides, one of which is released automatically, and drops into each
rim portion as it comes along.
The contact of the side with the heated rim will cause the side flange to expand
to such an extent as to hold the parts together, to permit of the runner being dropped
into a receptacle in which the runners are allowed to cool down, and the parts.
become firmly fixed together.
Dated this 20th day of April 1893.
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Runners for Castors and other
purposes.
1 MAURICE LACHMAN of St. George's Club, Hanover Square in the County of
London, Gentleman, 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 simple mode of constructing runners or wheels for
furniture castors and other purposes.
In carrying out this invention, the runner is formed in two parts, which are-
stamped out of a metal plate; one part consists of one side with the rim or running
surface, and the other part consists of the other side, with an annular flange of such
a diameter as to fit into the rim portion.
The rim portion is placed with its open side upwards; the flange of the side-
portion is then inserted in the open rim portion, and, by pressure, the flange is.
caused to expand outwards, and fix itself under the edge of the rim portion, which
will be caused to grip it firmly.

page_text: A spindle is then driven through the runner, and the runner is complete; or a
light split spring steel bush is driven through it to receive the spindle.
I prefer that the manufacture of these runners shall proceed automatically, for
which purpose the rim portions are placed with the open part upwards on a
continuous travelling table, and are successively presented to a shoot containing the
flanged sides, one of which is released at a time automatically, and drops into a rim
portion, as it comes along, and the two parts are presented to a die, which descends
and secures them together, after which the spindle or the bush, as the case may be,
is driven in.
In the accompanying drawing,
Fig. 1 shows a complete wheel constructed according to this invention.
Figs. 2 showing the respective parts separated,
Fig. 3 is a side elevation of the wheel; and
Figs. 4 show in side view and end view the split steel bush.
Fig. 5 illustrates the mode of securing the parts of the wheel together.
A is the rim portion, which is cup shaped, as shown, with a corrugated bottom,
in which the hole for the spindle is punched. B is the portion which forms the
other side of the wheel, & which is provided with a flange a to fit into the
rim portion A, and a hole for the spindle.
The flange a, it will be seen in Fig. 2, is vertical, so that it will enter the rim
portion, and the curved portion of the side which is eventually intended to
correspond with the corrugated bottom of the cup, is somewhat flat. When the
parts are put together, and pressure is applied by means of the apparatus shown at
Fig. 5, or in any other convenient manner, this curved portion is rounded to
correspond with the corrugation of the other side; the flange a is pressed outwards,
which causes it to fit tightly under the edge of the rim; and the edge of the rim
is pressed inwards to grip the flange, a perfect wheel being thus formed.
In Figure 5, C and D represent the top and bottom dies. When the die C is
raised after finishing the wheel, as it would carry with it the wheel, a loose
plunger E is provided, which strikes against a stop F, and forces the wheel out of
the die C.
In some castors, the axle rotates with the wheel, and for such a wheel it is only
necessary to drive in the axle, and the wheel is complete.
When the wheel is intended to rotate on the axle, I provide a split spring steel
bush, as shown at Figs. 4.
The bush is closed to be inserted in the wheel, and its natural springiness will
hold it secure in the wheel.
The use of the bush is necessary, because the metal of the wheel being com-
paratively soft and thin, the hole for the axle rapidly wears away and becomes oval,
thus rendering the wheel useless.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what ]
claim is :-
1. A wheel for castors consisting of two parts, one part comprising one side and
the whole of the curved running surface, and the other part the other side, the two
parts being secured together by pressure, which causes a flange on the side-to
spread out and catch under the rim or running surface of the main part, which, by
the same pressure, is caused to turn in and grip onto the flange, as set forth.
2. The use, in a wheel for castors constructed as shown and described, of a split
spring steel bush, as and for the purpose set forth.
Dated this 29th day of January 1894.