An Improved Roller Sledge.
Year: 1890

page_text: Date of Application, 3rd June, 1890
Complete Specification Left, 18th Nov., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
An Improved Roller Sledge.
I ERNEST RICHARD DOLBY of 8 Princes Street Westminster in the County of
Middlesex Civil Engineer do hereby declare the nature of this invention to be as
follows: :-
My invention consists in so making a sledge that it can be used upon a skating rink,
for this purpose I construct a sledge with a suitable seat or seats and provided with
the usual runners in the same manner as for ice but the said runners are kept
slightly clear of the surface of the rink and the sledge is supported upon rollers one
or more of which may be provided with steering mechanism. The sledge is intended
to carry one or more persons and to be pushed or pulled by other persons who may
or may not be skating upon roller skates. The sledge may be made so that the
rollers can be removed thus enabling it to be used on ice.
Dated this 2nd of June 1890
COMPLETE SPECIFICATION.
An Improved Roller Sledge.
I ERNEST RICHARD DOLBY of 8 Princes Street Westminster in the County
of Middlesex Civil Engineer 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 :-
My invention consists in so making a sledge that it can be used on a skating
rink. For this purpose I construct a sledge with a suitable seat or seats and
provided with the usual runners, the said runners are kept slightly clear of the
surface of the rink and the sledge is supported on rollers one or more of which may
be provided with steering mechanism. It is obvious that the sledge may be either
pushed or pulled.
-
In order that my invention may be more readily understood and carried into
effect I will describe the drawings hereunto annexed. The same letters refer to
the same parts or substitutes therefor in the several figures of the drawings:-
Figure 1 of the accompanying drawings represents the roller sledge in elevation
and Figure 2 the same in plan. Figure 3 represents a front elevation of the
leading castor or roller. Figures 4 and 5 represent rings of balls used in
the bearings of the castor. Figure 6 a side elevation in section and Figure 7 a
plan. Figure 8 is an end elevation of one of the hind rollers, Figure 9 a plan of
the underneath side of the same, Figure 10 an elevation in section. Figure 11 a
plan of the ball bearing and Figure 12 an end elevation of the roller.
In Figures 1 and 2 a is the front castor, bb the hind rollers, ee are the sledge
runners which stand clear of the surface of the rink. The sledge may be provided
with steering mechanism by any of the known means.
I do not confine myself to the use of three rollers or castors for it is obvious that
more can be used if desired. In Figures 3, 6 and 7, a is the roller which is precisely
similar to that marked b in Figures 9 and 10, hereinafter described. It is carried
upon balls preferably of steel, y, is a support preferably of steel. The support
has a tubular end which enters the bracket i, the weight of the sledge is borne upon
the balls j and the side strain taken on the balls & and the support g is held up to
the bracket i by the bolt and nuts m. The bracket i is fixed to the base of the
sledge by screws passing through holes n.

page_text: In Figures 9 and 10 is the roller carried on two rings of balls o preferably of
steel which run upon a spindle p shaped as shown at 7 to afford a path for the balls,
the end play being taken up with the nut .
The spindle is carried by the bracket s fixed to the underside of the sledge by
screws passing through the holes t, the spindle p is prevented from rotating by the
feather pin and the nut r is prevented from slacking back by the screw v.
I am aware that the construction of ball bearings as described is not new, I do not
therefore claim it broadly, but what I do claim is :-
An improved sledge for use on rinks as illustrated in Figures 1 to 12 of the
drawings inclusive, substantially as described.
Dated this 18th day of November 1890.
JOHN P. O'DONNELL,
2 Great George Street, Westminster, London, S.W.,
Agent for the said Applicant.