Improvements in Pulleys.
Year: 1892

page_text: e of Application, 8th July. 1892-Accepted, 13th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in Pulleys.
I, JOSEPH WALTER PARKIN, of No. 1630 N. Fifth Street, Philadelphia,
Pennsylvania, United States of America, 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 consists of a pulley formed with a central sleeve, between which
and the body of the pulley is a series of anti-friction balls, whereby the pulling
is adapted to rotate with ease and uniformity.
It also consists in forming the sleeve of two parts whereby the balls may be
readily located, said parts being provided with flanges, which inclose the balls, the
parts being connected, whereby the displacement of the same and of the balls is
prevented.
In the accompanying drawing :-
Figure 1 represents a side elevation of a pulley embodying my invention and
Figure 2 is a section thereof.
Similar letters of reference indicate corresponding parts in both the figures.
A designates the body of a pulley, in the centre of which is a transverse opening,
which is occupied by a sleeve or bushing B, formed of metal or other suitable
material and independent of said body. The sides of the body A are channelled
or grooved, and the ends of the sleeve are flanged, thus producing the two circular
chambers C, which are occupied by the loose antifriction balls D, it being seen
that the body A has its bearings on said balls, by which provision, as the balls
revolve, said body runs with ease and uniformity.
The bushing B is formed of two sleeves E and F, one fitted on the other,
the outer ends of each sleeve having flanges G, H respectively, which fully inclose
the balls D and constitute portions of the chambers C, as above stated.
The inner end of the sleeve F abuts against a shoulder F', formed on the face
of the sleeve E, and the outer surface of each at the joint thus formed is flush, so
as to prevent a smooth surface for the anti-frictional balls D.
The end of the sleeve E opposite to the flange G is turned over the adjacent
end of the sleeve F forming the lip G', by which provision the two sleeves are
connected as one, and separation of the same is prevented, the bushing B thus
retaining its position within the body A, and the balls being accordingly confined
in the chamber C.
Should it be desired to remove the sleeve B, the lip G¹ is bent outwardly, so
that it is disconnected from the end of the sleeve F, whereby the sleeves E and F
may be slipped off of each other, thus separating the same, and consequently
permitting the displacement of the sleeve B.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, declare that what I
claim is :-
A pulley having a body with grooved sides and a sectional bushing with flanged
ends, said flanges and grooved sides forming circular chambers, and anti-frictional
balls in said chambers, said bushing consisting of inner and outer sleeves, the inner
having a shoulder and a lip thereon and said parts being combined substantially
as described.
HASELTINE, LAKE & Co.,
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45, Southampton Buildings, London, W.C., Agents for the Applicant.