Improvements in the Construction of Split Loose Pulleys.
Year: 1894

page_text: Date of Application, 6th Apr., 1894
Complete Specification Left, 28th Dec., 1894-Accepted, 2nd Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Split Loose Pulleys.
I, SAMUEL EASTHOPE of 29 Rushby Street, Pitsmoor in the City of Sheffield,
Fitter, do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction of what are commonly called loose
pulleys, or those pulleys which are intended to revolve loosely upon their shafts,
such for example as the pulleys upon the countershafts of lathes, planers and
the like.
The object of my invention is to enable such pulleys to be removed and replaced
upon a shaft without removing the outside pulleys, such for example as to renew
the bush when it is worn.
I propose to construct a split or divided pulley and to bore out the boss to a
much larger diameter than the shaft for which it is intended, I then bore a hole in
the concave face of each half of the bore of the pulley to receive a stud upon the
outside of each half bush.
I make a bush of suitable metal divided into two equal parts longitudinally, each
part having on its convex side a stud or projection to fit into the holes before
mentioned as being made in the inside of the boss. These studs are to prevent
any rotary or longitudinal movement of the bush in the boss but I do not confine
myself to the precise details as described. The two parts of the pulley may be
secured together by screws or like means.
Dated the 4th day of April 1894.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
Improvements in the Construction of Split Loose Pulleys.
I SAMUEL EASTHOPE of 29 Rushby Street, Pitsmoor in the City of Sheffield,
Fitter, do hereby declare the nature of this invention and in what manner the
same has to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to the construction of what are commonly called loose
pulleys, namely those pulleys which revolve loosely upon their shafts, such for
example as the pulleys upon the countershafts of machine tools, upon which the
driving belt is moved when the machine is to be stationary.
The object of my invention is to enable such pulleys to be removed from and be
replaced upon a shaft without removing the outside pulleys, for the purpose of
renewing the bush when worn, or for other purpose.
The invention is illustrated in the annexed sheet of drawings, in which
Fig. 1, is an elevation of a split loose pulley constructed with my improvement.
Fig. 2, side view of the two parts of the bush.
Fig. 3, end view of same.
Similar letters of wafemanne indieste similar wants in any of the fouras

page_text: In carrying out my invention I construct a split or divided pulley A, of any
width or diameter, and either of cast metal or built up in parts such as that shown
in the Fig. 1, or of other suitable construction that is divided through the centre
boss B.
The two halves being held together I bore out the boss B, to a larger diameter
than the size of the shaft it is intended for. I then bore a hole C, in the centre of
the concave face of centre hole H, to receive a stud or projection D, either formed
upon or attached to the outside of the corresponding half of the bush E.
I make a bush of suitable metal divided into two parts E, E, longitudinally, each
part having upon its outer or convex side, a stud or projection D, before mentioned
which fits into the hole C, made in the boss.
These studs are to prevent any rotary or longitudinal movement of the parts of
the bush E, within the boss B, but I do not bind myself to the precise form of
these details as shown on the drawings, as equivalent means may be used and the
studs be dispensed with.
The parts of the pulleys may be secured together to form a complete pulley by
any of the means at present in use for such purposes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A split loose-pulley fitted with a divided bush, constructed and arranged in
the manner as hereinbefore described and substantially as shown in the drawings.
2. Constructing a split or divided pulley whether cast in two parts, or built up,
with a divided bush, so that it can be used as a loose pulley, and can be removed
from the shafting without disturbing other pulleys or pedestals, substantially as
described.
Dond the 21st do of December 1894
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.