Year: 1886

page_text: Articles.
I, WILLIAM BRADLEY of 53 Greek St. Stockport in the County of Chester
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:-
The object of this invention is to relieve the centre pin from the great strain
and friction to which it is ordinarily subject and facilitate thereby an easy
swivelling of the horn or wheel carriage around its centre, moving the articles to
which castors are applied, thus preventing damage to floors, carpets, oil-cloth, etc.
And in order that my invention may be better understood I have caused to be
appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Figs. 1, 4 and 5 are side elevations, Figs. 2. 3 and 8 vertical sections, and Figs. 6
and 7 plans of my improved castor.
In carrying out my invention I form the castor in two distinct parts, the socket a
and horn or carriage b.
The lower portion or face of the socket a I form with an annular groove c of
suitable diameter and depth either in the manner shown in Figs. 1. 24 and 6,
projecting around, as shown in Figs. 3, 5, 7 and 8, or flush with the exterior of
the socket a for giving sufficient support in proportion to the weight of the
furniture, etc.
The upper portion or face of the horn or wheel carriage b I form with a
corresponding annular groove d.
The horn or wheel carriage b I arrange to rotate on the centre pin e, which is
made stationary and may be riveted or screwed into the socket a see Figs. 2 & 3,
or be cast with it as shown in Fig. 8, in such a manner as to be vertically
adjustable against the lower portion or face of the socket a by means of a set
screw f which is screwed into the lower end of the centre pin e, a washer g being
placed between the head of the setscrew f and the horn or carriage b.
Between the faces and in the grooves c of the socket a and horn 6 I employ two
sets of anti-friction balls h and i made of any suitable material the balls h being
larger than the balls i and serving to prevent the great strain on the centre pin 6,
[Price fid

page_text: and friction between the socket a and horn or carriage b, the small balls i
serving to keep the large anti-friction balls h at equal distances apart from each
other.
In order to reduce friction the depth of the grooves c & the size of the large
anti-friction balls h are so proportioned as to leave an annular open space between
the faces of the socket a and horn or carriage b. which open space can be made
slightly larger or smaller by means of the set screw f, and so regulated as to give
the large anti-friction balls h the required play.
For the purpose of having the horn or carriage b, which is as usual, provided
with a wheel j, and rotating on the centre pin e, always well lubricated, I form the
horn or carriage b around the pin e with an annular recess ke see Figs. 2 and 3, or
I form such annular recess k in the pin e itself see Fig. 6.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
The combination of the socket a and horn or carriage b between which are
employed in sets anti-friction balls h and i in the manner substantially as described
and illustrated in annexed drawing and for the purpose specified.
Pro WILLIAM BRADLEY,
Bosshardt & Grant,
Agents to the Applicant.
Pro WILLIAM BRADLEY,
Bosshardt & Grant,
Agents to the Applicant.