Improvements in Ball Castors for Furniture.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Ball Castors for Furniture.
.12
I, GEORG FRIEDMANN,, of Bahnhofstrasse 20, Augsburg in the Empire of
Germany, Factory Manager do hereby declare the nature of this invention to be
as follows:-
The improvements are as follows:-The ball castor is made of steel or hard
glass and the like and runs or is guided in a ball bearing cup fastened on to the
leg or socket of the furniture. The extremity of said leg is provided with one
or more grooves to receive either a single smaller anti-friction ball or a series of
balls as desired. The ball castor when in function rests on or has contact with
said ball or balls and at the same time serves as an anti-friction ball bearing-
support for balls placed vertically above each other, the latter being arranged in.
the socket in a convenient manner.
Dated this 28th day of June 1895.
HERBERT HADDAN & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Ball Castors for Furniture.
I, GEORG FRIEDMANN, of Bahnhofstrasse 20, Augsburg, in the Empire of
Germany, Manufacturer 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 is well known that in the use of castors applied to furniture of all kinds.
considerable trouble and inconvenience have been met with, and it has been the
constant endeavour of persons interested to obviate such disadvantages by finding
a substitute for the rollers, such as castor balls which necessarily required to be of
light construction.
Such constructions although possible to execute never had the advantage of
imparting to the furniture or to the ball that facility or ease of movement which.
appeared to be desirable.
The improvements are as follows, referring to the annexed drawing which.
represents in vertical section my new form of construction.
The
A is the ball castor made of steel or hard glass and the like and runs or is guided.
in a ball bearing cup B fastened on to the leg or socket of the furniture.
extremity of said leg D is hollowed out to receive either a single small antifriction
ball C or a series of balls C, C, in addition as desired. The ball castor A, when
in function, rests on or has contact with said balls C, C¹, balls C¹ and C³ being-
placed vertically one above the other and arranged in the leg or socket D in a
convenient manner. It is manifest from the foregoing description that on account
of its novel arrangement the castor ball A is capable of an extremely sensitive-
movement, as by means of the anti-friction ball devices the free motion with very-
slight friction is assured.

page_text: Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Improvements in balls castors for furniture comprising a castor ball A mounted
in a ball bearing cup B screwed or otherwise fastened on to the leg or socket D
combined with one or more systems of antifriction balls C, C₁, C', free to revolve
in such socket and serve as ball bearings for the castor ball A, all substantially as
illustrated and described.
Dated this 21st day of February 1896.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, WC,
Agents for the Applicant.