Year: 1887

page_text: Date of Application, 5th Dec., 1887
Complete Left, 12th Jan., 1888
Complete Accepted, 16th Mar., 1888
RESERV
We, WALTER JOSEPH BOSLEY and WILLIAM WALLACE DICKSON, both of
27 Watlington Street, Reading, in the County of Berks, Engineers, do hereby
declare the nature of this invention to be as follows:-
:
Our improved pulley is made of cast iron, and is formed in two halves, being divided
crossways at its centre, in the usual way.
The boss is self-fixing being formed with two tapering dovetail joints, of which one
tongue and one socket are on each of the split faces of the hub, and are so arranged
that on the dovetail joints being closed, the two halves of the pulley lie close and flush
together both at the boss and at the periphery.
Inside the periphery are two small flanges or ledges through which set-screws or
bolts and nuts are fixed so as to prevent any tendency to separate during revolution.
Our improved pulley can be made of various sizes and cored, keywayed, and keyed
on the shaft, in the usual way.
mind this 5th day of December 1887
S. S. BROMHEAD,
97, Newgate Street, London, E.C.,
Patent Agent.

page_text: We, WALTER JOSEPH BOSLEY and WILLIAM WALLACE DICKSON of 27 Watlington
Street Reading, in the County of Berks, both Engineers, 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 :-
This invention refers especially to pulleys of various sizes and kinds for conveying
power by belts.
The improvement lies in the novel mode of joining together the two halves or portions
of a boss or hub constructed in two different parts.
We will now describe the method of constructing the split boss of a pulley for
belting or rope.
The boss being divided equally, (or.if preferred unequally) in the direction of its
axis, is formed with two tapering dovetail joints so that when the two parts are fitted
together they are self fixing and form an entire and firmly attached boss. The dove-
tail joints are so arranged that each part of the boss has a tongue on one side of its
face and a socket on the other, the opposite part of the boss having a corresponding
socket and tongue to complete the dovetail joint. On the joints being closed the two
halves of the pulley lie close and flush together, both at the boss and periphery.
Inside the lines of section of the periphery are two small flanges or lugs through
which cotter-pins, keys, set-screws, or bolts and nuts are fixed so as to prevent any
tendency to separate during revolution. Similar lugs may if preferred be placed
on the lines of section of the boss or hub instead of, or in addition to those on
the periphery.
In the accompanying drawings :-
Fig. 1. Shows an elevation of a pulley with our improved boss joined together.
Fig. 2. Shows the same, in two parts, with the dovetail joint separated.
A. Shows the boss.
().
B.
line of section.
"
"
"3
"
tongue of the dovetail joint.
"
>>
socket of ditto.
"
lugs on the periphery.
D.
E.
F.
"}
22
screw in ditto.
Although we have styled our invention "an improved cast-iron split-boss pulley,"
yet it is obvious that it may be made of cast steel or brass or other metal capable of
being run in a mould, or the two parts of the boss might be stamped of wrought iron
or steel in a mould if preferred, without departing from the principle of the invention,
which refers chiefly to the employment of the dovetail joints in connecting the two
faces of the boss or lub, and not to the particular metal of which it is composed.
The invention is also applicable to other wheels the hubs of which are made in two
parts.

page_text: Our improved pulley can be made in various sizes and bored, keywayed and keyed
on the shaft, or fitted to run loose when so required, in the usual way.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A mode of attaching the two separate parts of the split boss or divided hub
of a pulley or wheel by means of dovetail joints, as herein described and set
forth.
2. The use of lugs or flanges and screws or keys in combination with the
said dovetail joints for preventing separation of parts, as herein described and set
forth.