IMPROVEMENTS IN BOSSES FOR PULLIES, DRUMS, WHEELS, AND THE LIKE
Year: 1886

page_text: Date of Application, 10th Mar., 1886:
Complete Left, 10th Dec., 1886.
Complete Accepted, 21st Jan., 1887.
GEORGE TOLSON, Wool Extractor Prospect House Wakefield Rd Dewsbury Yorks
do hereby declare the nature of my invention for IMPROVEMENTS IN BOSSES FOR
PULLIES, DRUMS, WHEELS, AND THE LIKE to be as follows:-
The object of my Invention is to make the Bosses of Pullies, Drums, Wheels, and the
like, adaptable to various sizes of shafts. To obtain my object.-In-small Pullies, Drums,
Wheels, and the like-I have the hole in centre of Boss made Taper & large enough to
allow two three or moore wedges, made on one side to correspond with hole in Boss
& on the other side rounded out to saddle or grip the shaft, when the wedges are
placed in the Boss I leave a space between each wedge to allow Bolts to go through
the Boss with heads large enough to catch two wedges on one side, and nuts on the
other side of Boss, by Tightening the Bolts it will cause the wedges to grip the shaft by
being drawn into the Boss.
For large Pullies, Drums, Wheels, and the like I have the hole in the Boss made
Taper from each side to centre and wedges placed in from both sides with Bolts as
mentioned before.

page_text: COMPLETE SPECIFICATION.
Improvements in Bosses for Pullies, Drums, Wheels, and the like.
I, GEORGE TOLSON, Prospect House Wakefield Road, Dewsbury, Yorkshire, Wool
Extractor 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 my invention is to make the boss of a pulley, drum, wheel, and the
like adaptable to various sizes of shafts; To attain my object in small pulleys, drums,
wheels, and the like, I make the hole of the boss taper and large enough to receive
two, three, or more wedges made on one side to correspond with holes in hoss, and on
the other side concave or rounded out to saddle or grip the shaft when the wedges are
placed into the boss, a space is left between each wedge to allow bolts to pass through
the said boss, having beads large enough to catch onto two wedges on one side and
washers and nuts on the other side of boss, which bolts on being tightened will cause
the wedges to grip the shaft. For large pulleys, drums, wheels, and the like, I have
the hole in the boss made taper from each side to centre and wedges placed in from
both sides with bolts as before mentioned.
Such being the nature and object of my invention I will now proceed to describe
the same more fully and for that purpose make reference to the accompanying sheet
of Drawings which illustrate the manner of carrying out my invention, Fig. 1 is end
view, and Fig. 2 section of the hoss of the wheel, having my improvements applied
thereto, A is the boss of wheel which may or may not be in two parts, and B. is a
shaft upon which the wheel is to be fastened. The boss is made with a suitably sized
hole, of much larger diameter than the shaft, the hole in such boss being made taper.
at each end and also made with hexagon sides to receive wedges O, Fig. 3 is end view
of boss without wedges. These wedges C, of which in this case there are six in
number, three, for each end, are inserted into the boss endwise, with their bottom
surface in contact with the shaft, and their opposite surfaces in contact with the
tapering holes in boss. After these wedges are put into their places bolts D, are passed
between and through the wedges and through spaces a made in the boss, see-Fig. 3.
and after the nuts are placed on the bolts and screwed up, the wedges are drawn
nearer together and forced against the conical holes and against the shaft, in such
manner as to securely hold the pulley in position. Fig. 4 is detail of a wedge, and
Fig. 5. end view of same.
By means of my invention it will be seen that the wheels can be fastened upon a
shaft of different diameters, consequently wheels can now be removed from one shaft
to another which has not hitherto been possible. Although I have shown the wedges

page_text: in sections; but where the shaft permits they may be made all in one piece and
pushed into shafts into each end of the boss, and for small wheels the insertion of
wedges at each end would not be necessary, as long taper wedges inserted into one
end of the boss will be sufficient.
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 :-―
The means of fastening wheels upon shafts by means of inclined surfaces sub-
stantially as shewn and described.