IMPROVEMENTS IN BUSHES OR BEARINGS FOR BLOCKS AND PULLEY SHEAVES
Year: 1884

page_text: I GEORGE HUGHES of Temple Works, Temple Street, Wolverhampton in the
County of Stafford Wrought Iron Manufacturer, do hereby declare the nature of
my said Invention for IMPROVEMENTS IN BUSHES OR BEARINGS FOR BLOCKS AND
PULLEY SHEAVES, to be as follows:-
The object of my invention is to improve the bushes or bearings of blocks and
pulley sheaves.
In the bore of a metallic pulley sheave, and at about the middle of such bore,
I cut an internal annular groove of a semicircular section.
If the pulley sheave is formed of wood, or other nonmetallic substance, I bush
such pulley sheave with a metallic bush, the bore of which bush has a similar
annular groove of a semicircular section and such bush is usually formed in two
parts which are united in the pulley sheave by rivetting or screwing the same
together.
The pin or axle, which fits into the above described bush is in one case made
with an annular projecting ring (semicircular in section) which accurately and
easily fits into the annular recess cut in the bush; and, while allowing free rotary
motion, at the same time prevents lateral motion and retains the relative position
of the pulley sheave upon the axle. In another arrangement, instead of the ring or
flange being formed upon the axle to fit into the groove in the bush, I form an
annular groove in each: that is to say, a semicircular annular groove surrounding
the axle, and a similar groove in the bush, thus providing an annular chamber in
which I place steel bars to form a ball bearing, whereby the friction ordinarily
arising, is very much reduced.
By screwing or otherwise forcing the two portions of the bush together, the balls
are kept in contact with the bearing surfaces and adjusted.

page_text: I GEORGE HUGHES, of Temple Works, Temple Street, Wolverhampton, in the
County of Stafford, Wrought Iron Manufacturer, do hereby declare the nature of
my said Invention for "IMPROVEMENTS IN BUSHES OR BEARINGS FOR BLOCK AND
PULLEY SHEAVES," and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
The object of my invention is to improve the bushes or bearings of block and
pulley sheaves.
In the bore of a metallic pulley sheave, and at about the middle of such bore,
I cut an internal annular groove; of a semi-circular or other suitable section, or
I form an annular rib therein.
If the pulley sheave is formed of wood, or other non-metallic substance, I bush
such pulley sheave with a metallic bush, the bore of which bush has a similar
annular groove of a semi-circular or other suitable section, or an annular rib; such
bush is usually formed in two parts, which are united in the pulley sheave by
rivetting or screwing the same together.
The pin or axle, which fits into the above described bush, is, in one case made
with an annular projecting ring (of a semi-circular or other suitable section) which
accurately and easily fits into the annular recess cut in the bush; and, while
allowing free rotary motion, at the same time prevents lateral motion, and retains
the relative position of the pulley sheave upon the axle. In another arrangement,
instead of the ring or flange being formed upon the axle to fit into the groove in
the bush, I form an annular groove in each; that is to say, a semi-circular annular
groove surrounding the axle, and a similar groove in the bush, thus providing an
annular chamber, in which I place metallic or other balls to form a ball bearing,
whereby the friction ordinarily arising, is very much reduced.
By screwing or otherwise forcing the two portions of the bush together, the
balls are kept in contact with the bearing surfaces and adjusted.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar letters of reference indicate corresponding parts.
Fig. 1 is an elevation of a metal pulley sheave. Fig. 2 is a section on the
line 1-2 of Fig. 1. Fig. 3 is a similar section, shewing one modification of my
invention. a is the pulley sheave. b is a central web or rib. cc is the bush, or
axle made in two parts, and shewn in position in Fig. 3. In Fig. 4 is shewn my
improved method of fitting such sheaves with ball bearings; the two portions of
the bush c¹ c¹ retain the balls d d in a central position.
In fitting the aforesaid bearings to wooden sheaves I fit a metallic bush as
shewn in Figs. 5, 6 and 7. e is a plate forming part of the bush, shewn in
elevation in Fig. 5 and in section in Fig. 6. Fig. 7 is a section of the corresponding
half of the bush e¹. fff are holes to receive pins or screws for securing the bush
to the sheave. ggg are perforations in the plate to receive the projections g¹ g¹
(Fig. 7). These projections are passed through the holes ggg and rivetted, as
shown in Figs. 12 and 13.

page_text: Figs. 8 and 9 represent in elevation and section, one form of bearing, consisting
of a solid ring h, of the form shewn, which fits and runs freely in the bush shewn
in Figs. 5, 6 and 7; the complete bush and bearing being shewn in section in
Fig. 12. This form of bearing may be also applied to the metallic sheaves shewn
in Figs. 1, 2 and 3.
Instead of the solid ring bearing shewn in Figs. 8 and 9, the bearing k shewn in
Figs. 10 and 11 may be used, with ball bearings, as shewn together in Fig. 13.
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. The methods of mounting pulley sheaves with bearings, substantially as
herein before described and shewn on the drawings, Figs. 1, 2, 3, 5, 6, 7, 8, 9
and 12.
2. The methods of mounting pulley sheaves with ball bearings, substantially as
herein before described and shewn on the drawings, Figs. 4, 5, 6, 7, 10, 11 and 13.
3. The general construction, combination and arrangement of the several and
respective parts, together forming my improvements in bushes or bearings for block
and pulley sheaves, substantially as herein before described and shewn on the
drawings.