Improvements in and connected with Pulleys."
Year: 1897

page_text: Date of Application, 4th Feb., 1897
Complete Specification Left, 4th Nov., 1897-Accepted, 4th Dec.,
1897
$6
Improvements in and connected with Pulleys."
I, THOMAS FREDERICK EDWARDS, of 69, Sherrard Road, Forest Gate, in tho
county of Essex, Manager and Secretary, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in and connected with split pulleys,
the object of the improvements being to facilitate their. attachment to and
removal from shafting.
In carrying out my invention as applied to a metal pulley I form the pulley
in two halves as hitherto but I connect the two halves hingewise so that they
can be opened to allow the pulley to be placed over a shaft. The periphery of
the boss on each side of the pulley is cut with a screw thread and when adjusted
in position the pulley is fixed to the shaft by means of a split screwed collar, the
two halves of which may be hinged or otherwise suitably connected together. The
screw thread on the boss or in the collar is slightly tapered in order to obtain
the requisito pressure to cause the boss to grip the shaft.
In the case of wooden pulleys I provide them with metal half bosses which I secure
to the shaft by means of my split screwed collars.
It will be obvious that my split screwed collars can be employed for securing
split pulleys the halves of which are not hinged but which are provided with my
screwed bosses.
1
13
L00
1, THOMAS FREDERICK EDWARDS, of 69, Sherrard Road, Forest Gate, in the
county of Essex, Manager and Secretary, 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 relates to improvements in and connected with split pulleys,
the obiect of the improvements being to facilitate their attachment to and
removal from shafting.
In carrying out my invention as applied to a metal pulley I form the pulley
in halves as hitherto but I connect. the said halves hingewise so that they
can be opened to allow the pulley to be placed over a shaft. The periphery of
... 01

page_text: the boss on each side of the pulley is cut with a screw thread and when adjusted
in position the pulley is fixed to the shaft by means of a split screwed collar, the
halves of which may be hinged or otherwise suitably connected together. The
screw thread on the boss or in the collar is slightly tapered in order to obtain
the requisite pressure to cause the bass to grip the shaft.
In the case of wooden pulleys I provide them with metal half bosses which I secure
to the shaft by means of my split screwed collars.
It will be obvious that my split screwed collars can be employed for securing
split pulloys the halves of which are not hinged but which are provided with my
screwed bosses.
To enable my invention to be fully understood I will describe it by referenco
to the accompanying drawing, in which :-
Figure 1 is an elevation of a metal pulley constructed according to my inven-
tion:
Figure 2 is a section on the line 2-2 figure 1:
Figure 3 is an elevation of my split collar:
Figure 4 is a plan thereof; and,
Figure 5 is a section on the line 5-5 figure 3.
a, a are the halves of the pulley, the said halves being hinged together at b and
provided at the opposite ends with lugs c, e having holes which are in alignment
with one another when the halves of the pulley are closed together over a shaft
so that they can be secured together by a bolt d. e, e are the two half bossed
upon the half pulleys a, a the said half bosses 'being 'provided with screw
threads f, upon their peripheries as shewn in Figure 2.
9, are my split collars, the halves of each collar being advantageously hinged
together at h, as shewn in figure 3, and their other ends being respectively grooved
and tongued so that they can be held together by a pin or screw which passes
through the grooved and tongued portions. The inner periphery of the collar
is screw-threaded as shown in figure 5 so that the said collars can be screwed.
upon the two sides of the screw-threaded boss e, e which are made to taper slightly
so as to obtain the requisite pressure to cause the said boss to grip the shaft.
Having now particularly described and ascertained the nature of my said inven-
11on and in what manner the same is to be performed, I declare that what [
claim is: -
1. A pulley made in halves and having its boss externally screw-threaded, the
said halves of the pulley being held together upon the shaft by internally screw-
threaded split collars which are screwed upon the two sides of the boss, sub-
stantially as described and illustrated.
2. In a pulley of the kind described in claim 1 hinging the halves of the pulley
together and also the halves of the split collars, substantially as described and
illustrated.
3. The improved pulley, hereinbefore described and illustrated in the accom-
panying drawing.
D... 001
100%
1008
UL VULL JOST
G. F. REDFERN & Co.
4, South Street, Finsbury, London. Agents for the Applicant.
G. F. REDFERN & Co.
4, South Street, Finsbury, London. Agents for the Applicant.