Improvements in Ball and other Castors.
Year: 1889

page_text: Date of Application, 30th July, 1889
Complete Specification Left, 6th Mar., 1890-Accepted, 12th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Ball and other Castors.
İ, ROBERT JOHNSON, of 816 Ashton Old Road, Openshaw, in the county of
Lancaster, Agent, do hereby declare the nature of this Invention to be as follows:
It consists in drilling through the centre of the ball or other revolving part of the
castor, a hole of suitable shape which admits a suitable metal spindle the ends of
which are attached to suitable projections or bearings upon the body of the castor.
The ball or other revolving part of the castor revolves upon the spindle and the ends of
the perforation are enlarged into two conical cavities or to a shape approaching two
conical cavities, which narrow in the centre of the ball or other revolving part to the
diameter of the metal spindle. The effect of the enlargement of the ends of the
perforation is to allow sufficient play to the ball or other revolving part of the castor
to admit of its describing any part of the are of a circle upon any surface it is placed
upon while retaining all the leverage of an ordinary wheel castor.
11.
BOLL .
CTI 1000
JOHN HENRY. TOPHAM.
46ª, Market Street, Manchester, Agent to Applicant.
JOHN HENRY. TOPHAM.
46^, Market Street, Manchester, Agent to Applicant.
COMPLETE SPECIFICATION.
Improvements in Ball and other Castors.
ROBERT JOHNSON 816 Ashton Old Road Openshaw, Manchester Linen Thread
Manufacturer, and Agent, 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:—
It consists of being constructed on perpendicular lines and may be of castings or
sheet metals or other suitable material. The bottom part consists of a cup or bell-
shaped receptacle of various diameters to receive the spherical bowls, balls or rollers
and is so arranged as to allow of an internal circular groove being chased or formed
as shewn on Fig. 1 marked A A in which groove the spindle B B on which the balls
rotate and travels in all directions necessary for the purposes of a castor and thus
creating a new kind of an universal joint or motion. The balls rollers or bowls
marked CC on Fig. 1 are so bored or made as to form two cones and are shewn by
dotted lines marked D. D. and being in inverse positions.
The vertex of each cone being at centre of the bowl and marked E. The spindle
may be made of round steel or other material and is cut into suitable lengths so as to
allow it to travel round the internal groove A. A. On one side of the groove a small
hole is bored of suitable diameter for the spindle to enter and the bowls being put in
position and the spindle put through, then a small set-screw at F is introduced to
make up the hole so as to prevent the spindle working out of its position. This
castor also consists of being made in two or more parts or pieces and is so arranged
that the top and bottom parts may be put together with a small spindle rivetted or
screwed with a nut to hold them together and thus form the ordinary swivel joint as
shewn on Fig. 3 at Aa Aa and may be made for bedstead and other various purposes
like Fi

page_text: rock my invention Claim
A Double Universal Action on perpendicular lines and a new Horizontal Circular
Motion and new structural advantages necessary for a thoroughly effective Bowl Ball
or Roller Castor and reserve all rights incident to the making or designs so as to
cover the spirit of this Invention whether specified or not.
Dated this Fifth day of March Eighteen hundred and ninety.