Improvements in Ball-castors.
Year: 1894

page_text: Date of Application, 7th June, 1894-Accepted, 7th July, 1894
COMPLETE SPECIFICATION.
Improvements in Ball-castors.
I JOHN BEWLEY, "Tertius," Chartered Accountant, of 82, Littledale Road,
Seacombe, near Birkenhead, Cheshire, 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 relates to Improvements in Ball-castors, and has for its object to
provide a castor of this class that shall be easy of running, simple in construction
and inexpensive of manufacture.
In order that the said invention may be the more readily understood, reference
is made to the accompanying sheet of illustrative drawings, in which:
Fig. 1 is an elevation of one form of my invention.
Fig. 2 being a section thereof, while
Figs. 3 and 4 are a section and a plan, respectively, of a modified form of castor,
the outer casing or cup being removed.
Referring to the drawings, in which like letters of reference indicate corre-
sponding parts throughout the figures, a, a¹ (Figs. 1 and 2) is a cup or socket, in
which fits the ball 6 formed of metal, porcelain or any other suitable material
which ball is of such a size as to be capable of revolving freely within the said cup
or socket.
The latter is diminished or tapered toward the lower part of mouth for the
purpose of preventing the ball 6 dropping or working out of same.
The cup or socket a, a' is formed in two portions, the upper one a' of which is
tapped at a³ so as to be capable of screwing upon the threaded rim a² of the lower
portion a. A dome-shaped bottom a' is provided in the upper portion a¹, against
which the ball babuts. The upper opening of the lower portion a is of such a size
as to be capable of allowing the ball b being inserted therein, or removed from the
cup or socket thereby.
Referring to Figs. 3 and 4 in which I have shewn the modified form of castor,
c is a plate, having a central opening c¹ around which are formed, by stamping or
in any other suitable manner, three circular recesses or sockets designed to
receive three small balls b¹.
The said plate c is fixed within the outer case or cup (not shown) in a horizontal
position, above the travelling ball b, (the upper portion of which projects slightly
through the opening c) so that the balls b will be in contact with the said ball 6,
and will, by reason of being able to revolve freely within their sockets, cause the
ball 6 to revolve more freely than in the first described form and without
encountering as much friction.
I do not wish to confine myself to the use of three balls b¹ but may employ
any desirable number, also if found convenient I may so arrange the sockets c
that the peripheries of such balls will be capable of being in contact with each
other.
The ball b is maintained within the outer case or cap in the manner described
with reference to Figs. 1 and 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. The improvements in ball-castors, substantially as described with reference
to Fies 1 and 2 of the accompanying drawings.

page_text: 2. The improvements in ball-castors, substantially as specified, and illustrated
by Figs. 2 and 3 of the drawings.
Dated this 7th day of June 1894.
HUGHES & YOUNG,
12, Basinghall Street, London, Agents for the Applicant.