Year: 1885

page_text: We HENRY GREENE of 218 Upper Thames Street in the City of London,
Managing Director of the Patent Ball Castor Company. Limited of 28 Fenchurch
Street in the City of London, and WILLIAM WILLIAMS Box of Crayford in the
County of Kent, Director, of the said Company, and both. on behalf of the said
Company do hereby declare the nature of this invention to be as follows:-
•
According to this invention we rest the upper end of the ball on a rounded flat
or slightly hollowed out button or stud of steel, chilled cast iron or other hard
metal and we support the ball sideways against projections three or more in
number formed on the inside of a ring of steel, chilled cast iron or other hard.
metal, such ring being placed about interinediate between the top of the ball and
the centre of same. The ring is by preference stamped out of sheet steel and oil
hardened. The aforesaid stud and ring are both fixed in the bulb or case which
holds the ball and which is formed with a comparatively large cavity to ensure
perfect freedom of action of the ball under all circumstances. Or the stud and
ring or either of them might be made to drop into suitable recesses without being
fixed. Or the castor ball may have its lateral bearing against three or more hard
metal studs or round headed pins inserted in the bulb of the castor or against three
or more small hard metal balls. The bulb is provided with a ring cap which keeps
the ball from dropping out but does not touch it while in wear, or the bulb night
be spun over after the ball has been inserted, or we inay form it with claws or
leaves which are bent over after the ball has been inserted. The ball is made of
chilled cast iron. The socket or upper part of the bulb is made in any well known
form according to requirements. When the castor is to be a so-called screw or
cabriole castor we may make the screw and the aforesaid stud (against which the
top of the ball rests) in one; for instance the screw might be cast into the stud,
and we then form the latter with a square or with notches for taking hold of it
with a box spanner or forked screw driver respectively or it may be formed with a
hole through for inserting a tommy for screwing it into the leg or other part of
furniture. Or we may make the stud with a small flange which rests in a recess
in the bulb, and put it in its place after the screw has been screwed into the piece
of furniture.

page_text: :
Improvements in Ball Castors.
We, HENRY GREENE of 218 Upper Thames Street in the City of London,
Managing Director of the Patent Ball Castor Company Limited of 28 Fenchurch
Street in the City of London, and WILLIAM WILLIAMS Box of Crayford in the
County of Kent Director of the said Company and both on behalf of the said
Company 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:-
According to this invention and as shown in the accompanying drawings, in
which Figures 1, 2, 3, 4 and 5 are vertical sectional views of various modifications
and Figures 1° 2° 3° 4° and 5ª corresponding plan views and sections; we work the
upper end of the ball A against a rounded flat or slightly hollowed out button or
stud B as shown in Figures 1 and 2; or a ball B as shown in Figures 3, 4 and 5,
such button stud or ball being made of steel, chilled cast iron or other hard metal
and we support the ball A sideways against three or more balls C as shown in
Figures 1, 4 and 5 or against projections C as shown in Figures 2 and 3 three or
more in number formed on the inside of a ring of steel, chilled cast iron, or other
hard metal, such ring or such balls C being placed about intermediate between the
top of the ball A and the centre of same. The ring is by preference stamped out
of sheet steel and oil hardened. The aforesaid stud B and ring C are both fixed
in the bulb or case D or in case of the balls B and C these are allowed to turn
freely in their places in the case D which holds the ball A and which is formed
with a comparatively large cavity to ensure perfect freedom of action of the ball
under all circumstances. Or the stud and ring or either of them might be made
to drop into suitable recesses without being fixed. The bulb D is provided with a
ring cap E which keeps the ball A from dropping out but does not touch it while
in wear, or the bulb D might be made deeper and be spun over after the ball A has
been inserted or we may form the bulb D with claws or leaves which are bent
over after the ball A'has been inserted. The ball A is by preference made of
chilled cast iron and the balls C by preference also. The socket or upper part of
the bulb is made in any well known form according to requirements and the forms
shown are of course merely samples. When the castor is to be a so-called screw
or cabriole castor as in Figure 5 we may make the screw F and the aforesaid
stud B (against which the top of the ball A rests) in one, for instance the screw
might be cast into the stud, and we then form the latter with a square or with
notches for taking hold of it with a box spanner or forked screw driver respectively
or it may be formed with a hole through for inserting a tommy for screwing it
into the leg or other part of furniture. Or if in Figure 5 a stud is used instead
of a ball B we may make the stud with a small flange which rests in a recess in
the bulb, and put it in its place after the screw F has been screwed into the piece
of furniture. The ball B is in Figures 3 and 5 shown as working against a sinall
dish G inserted in the bulb D. In Figure 4 the ball B works against a disc G and
against the side of a recess in the bulb D. Or the ball B may work against the
head of the screw F Figure 5.

page_text: Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is:-
A ball castor in which the ball A works against a button, stud or friction, ball B
and against three or more studs projections or friction balls C, the whole being
arranged and constructed substantially as set forth.