Year: 1896

page_text: I, CHARLES HOSKINS, of West Street, Erith, Kent, Gentleman, do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in sheaves or pulleys, the object being
to provide a ball bearing sheave or pulley of simple construction and one which
shall be sufficiently strong for general use.
In carrying my invention into practical effect, my improved sheave or pulley
comprises an outer rim or ring furnished centrally with a hole or perforation
within which I arrange a centre or boss.
The outer periphery of the centre or boss and the inner periphery of the afore-
said hole or perforation are each furnished with a groove or recess of suitable
shape, the two grooves or recesses when brought together forming a ball race for
the bearing balls. In order to insert the balls, a suitable hole or passage is
drilled through the outer ring or rim into the aforesaid grooves or recesses forming
the ball race and through which the said balls are passes, the hole or passage
being then closed by means of a suitable screw plug, the head of which is
arranged so as to be flush with the outer edge or periphery of the pulley.
I do not restrict myself to the number of rows of bearing balls I use, as two
or more rows may be employed as found necessary, a corresponding number of
holes or passages being drilled through the outer ring or rim to allow of the said
balls being inserted.
D
DL1000
I, CHARLES HOSKINS, of West Street, Erith, Kent, Gentleman, do hereby declare
the nature of this invention and in what manner the same is to be performed,
0 to be particularly described and ascertained in and by the following statement:-
My invention relates to improvements in sheaves or pulleys, the object being

page_text: to provide a ball bearing sheave or pulley of simple construction and one which
shall be sufficiently strong for general use.
In carrying my invention into practical effect, my improved sheave or pulley
comprises an outer rim or ring furnished centrally with a hole or perforation
within which I arrange a centre or boss..
The outer periphery of the centre or boss and the inner periphery of the afore-
said rim or ring are each furnished with a groove or recess of suitable shape,
the two grooves or recosses when brought together forming a ball race for
the bearing balls. In order to insert the balls, a suitable hole or passage is
drilled through the outer ring or riminto the aforesaid grooves or recesses forming
the ball race, and through which the said balls are passed, the hole or passage
being then closed by means of a suitable screw plug or jambed screw, the head
of which is arranged so as to be flush with the outer edge or periphery of the
pulley.
I do not restrict myself to the number of rows of bearing balls I use, as two
or more rows may be employed as found necessary, a corresponding number of
holes or passages being drilled through the outer ring or rim to allow of the said
balls being inserted.
..
In order that my invention may be more fully understood; I will now proceed
to describe same with reference to the accompanying drawings in which Fig. 1
is a side elevation of my improved, pulley, Fig. 2 being a sectional elevation of
same. Fig. 3 is a cross section of a pulley and Fig. 4 is a similar view of a
double pulley having two rows of steel balls..
My improved, pulley comprises essentially an outer rim or ring à having a
separate and detachable centre or boss U. The outer periphery of the central
boss and the inner periphery of the rim or ring a are both furnished with
suitable grooves or recesses d, e, in such a manner that a suitable ball race is
formed, containing the steel balls f which are passed into position through a
suitable opening formed in the outer rim. or ring a, and which is closed by a
suitable screw plug g, or a jambed screw may be employed for this purpose and
which would not be liable to turn when the pulley was in use.
An ordinary pulley is preferably provided with one row of centrally arranged
steel balls as shown at Fig. 3, but where larger pulleys are employed or where
it may be found advantageous to do so, two rows or more of steel balls may be
used as shown at Fig. 4, access being had to each, ball race by a separate hole
or passage drilled through the outer rim or ring a and closed by means of a
separate screw plug g (Fig. 4).
&
My improved pulley may be made of any suitable material or of a combination
of suitable materials, and I wish it to be understood. that, I do not restrict myself
to the number of rows of steel balls employed in connection with each pulley,
neither do I restrict myself to the shape of the grooves or recesses forming the
ball race, as they may be V-shaped or of other suitable form as found most
suitable for the purpose in view:
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. A ball bearing pulley comprising essentially an outer rim or ring a, a centre
or boss b, a ball race formed by recesses d and e upon the inner periphery of the
outer rim or ring a and the boss or centre 6 respectively, and a hole or perfora-
tion formed through the outer rim or ring closed by means of a screw plug or
jambed screw g, and through which the steel balls f may be passed to the ball
race, the whole combined and arranged, substantially as: herein described and
shown and for the purposes specified.
2. A ball bearing pulley having one, two, or more rows of steel balls or the
like, substantially as herein described and shown, and for the purposes specified.
1 2

page_text: 3. The improvements in sheaves or pulleys, substantially as herein described
and shown, and for the purposes specified.
Dated this 19th day of August 1897.
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.