IMPROVE- MENTS IN AND APPLICABLE TO PULLEYS, RIGGERS, DISCS OR WHEELS to be as follows:
Year: 1885

page_text: We, GEORGE SMITH, EDWIN SMITH, and NATHANIEL SMITH, the younger, all of
Nene Side Iron Works, Thrapston, in the county of Northampton, Engineers and
Ironfounders do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN AND APPLICABLE TO PULLEYS, RIGGERS, DISCS OR WHEELS to be as
follows:-
:-
"
The object of this invention is to provide simple means for applying and fixing
pulleys, riggers, discs, or wheels securely to shafting and spindles.
In carrying out the invention we bore the centre hole of the pulleys, riggers,
discs or wheels conical and screw the said holes internally with either a V or
square thread-We provide a bush or socket turned and screwed externally and
adapted to fit into the hole in the pulley, rigger, disc or wheel; the said bush or
socket is bored internally and split on one or more sides and when the pulley,
rigger, disc or wheel is screwed into the said bush or socket the latter firmly
grips the shafting or spindle and by this means the pulley, rigger, disc or wheel
is firmly fastened and secured on to the shafting or spindle.
By this arrangement it will be obvious that a pulley or wheel can be adapted to
and fixed on shafts or spindles of different diameters by employing a suitably
sized bush.

page_text: We GEORGE SMITH, EDWIN SMITH and NATHANIEL SMITH the younger all of
Nene Side Iron Works, Thrapston, in the county of Northampton, Engineers and
Ironfounders 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:-
The object of this invention is to provide simple means for applying and fixing
pulleys, riggers, discs or wheels securely to shafting and spindles.
In carrying out the invention we bore the centre hole of the pulleys, riggers,
discs or wheels conical and screw the said holes internally with either a V or
square thread.
We provide a bush or socket turned and screwed externally and
adapted to fit into the hole in the pulley, rigger, disc or wheel; the said bush
or socket is bored internally and split on one or more sides.
In order that our invention may be fully understood we will describe the same
by reference to the accompanying drawing in which figure 1, is a section of a
pulley having a conical and screw threaded centre hole according to our invention;
figure 2, is a longitudinal section of the screw bush or socket; figure 3 is an end
view of the bush or socket in position ready to be placed on a shaft which is
represented in cross section; figure 4, is a similar view to figure 3, but shewing the
bush or socket placed on the shaft; figure 5, is a perspective view shewing a shaft
with the bush or socket thereon and the pulley in position to be passed onto the
same. Similar letters in all the figures represent similar parts.
a, is an ordinary pulley the centre hole b, of which is bored conical and is
provided internally with a screw thread as shewn in figure 1; c, is the bush or
socket turned conical and screw threaded externally as shewn in figure 2 and
adapted to screw into the hole b, in the pulley a, the bush or socket c, being bored
internally; dd, d, d, show the places at which the sides of the bush or socket are
divided; e, is a liuing in the interior of the bush or socket c, which lining is formed
of suitable material such as emery cloth rivetted or otherwise suitably attached to
the parts of the bush c, and serving to connect together the segments of the bush
or socket so as to allow them to be opened as shewn in figure 3.-The said lining
also serves to prevent the bush or socket from slipping or turning on the shaft f
tvben screwed into the centre hole b, of the pulley a.
To secure a pulley (or a rigger, disc or wheel) to a shaft by these improved
means it is simply necessary, the pulley a, being placed upon the shaft f, as in
figure 5, to open the divided and screw threaded bush or socket c, as shewn in
figure 3, when it can be placed on the shaft f, as shewn in figures 4 and 5 and the
pulley a, being rotated so as to screw its conical centre hole b, over the conical
bush or socket c, the latter will be caused to firmly grip the shaft f, and the
pulley a, will be securely fixed on the bush or socket c.
By this arrangement it will be obvious that a pulley or wheel can be adapted
to and fixed on shafts or spindles of different diameters by employing a suitably
sized bush,

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
1. The combination with a pulley, rigger, disc, or wheel having a conical and
screw threaded centre hole, of a hollow divided bush or socket adapted to screw
into the said centre hole of the pulley or the like substantially as and for the
purpose herein before described and represented in the accompanying drawing.
2. The manufacture and use of a divided, hollow bush or socket such as c, screw
threaded on its exterior and having a lining e, of suitable material substantially as
and for the purposes herein before described and represented in the accompanying
drawing.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.