Improvements in Pulley Wheels and in the Manufacture of the same.
Year: 1899

page_text: Date of Application, 1st Aug., 1899
PL
=
1000
Date of Application, 1st Aug., 1899
Complete Specification Left, 18th Feb., 1900-Accepted, 24th Mar, 1900
PROVISIONAL SPECIFICATION.
Improvements in Pulley Wheels and in the Manufacture of the same.
I, ARCHIBALD PRENTICE, of The Cable Depot, Hockley, Birmingham, in the
County of Warwick, Engineer, do hereby declare the nature of my invention to
be as follows;
My invention has for its object improvements in pulley wheels and in the
manufacture of the same which will be found to run smoothly and silently and
are easier to fix or take to pieces for removing the outer part or wearing surface
than those as at present constructed.
In carrying my invention into practice I construct the inner portion or boss
of my pulleys preferably from cast steel with an inclined or taper surface or
cone shaped. I then construct the outer shell or wearing surface with a corre-
sponding incline or tapering on its inner circumference or surface so that when
fitted on the inner portion or boss the two parts wedge together. Holes are formed
parallel with the surface of the pulley passing partly through the wedge shaped
portion of the outer shell and partly through the wedge shaped portion of the boss
or inner part of the pulley so that the parts can be firmly secured together by
bolts or the like. In some cases the outer surface of the shell may be extended
so as to increase the width of the pulley and the pulleys may be either plain or
with a single or double flange.
41.
14
L
1000
ARCHIBALD PRENTICE.
Fellow of the Chartered Institute of Patent Agents,
By George Barker,
Agent for Applicant, 77, Colmore Row, Birmingham.
Improvements in Pulley Wheels and in the Manufacture of the same.
I, ARCHIBALD PRENTICE, of The Cable Depot, Hockley, Birmingham, in the
County of Warwick, Engineer, do hereby declare the nature of my said invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement: --
My invention has for its object improvements in pulley wheels and in the
manufacture of the same which will be found to run smoothly and silently and
are easier to fix or take to pieces for renewing the outer part or wearing surface
than those as at present constructed.
In carrying my invention into practice I construct the inner portion or boss or
hub of my pulleys preferably from cast steel with an inclined or taper surface or

page_text: cone shaped. I then construct the outer shell or renewable wearing surface with a
corresponding incline or tapering on its inner circumference or surface so that
when fitted on to the inner portion or boss the two parts wedge together. Holes are
formed parallel with the surface of the pulley passing partly through the wedge
shaped portion of the boss or inner part of the pulley so that the parts can be firmly
secured together by bolts or the like. In some cases the outer surface of the shelt
may be extended so as to increase the width of the pulley and the pulleys may be
either plain or with a single or double flange.
In order that my invention may be more clearly understood and easily carried
into practical effect I have appended hereunto two double sized sheets of drawings
upon which I have illustrated examples of my pulley wheel.
Figure 1 is an end elevation of, my improved pulley wheel..
Figure 2 is a part sectional side elevation of Figure 1 taken on the line x―y.
Figure 3 is a side elevation of the inner portion or boss with the outer shell or
wearing surface removed.
Figure 4 is a similar view to Figure 1 shewing a slightly modified form of my
pulley.
Figure 5 is a sectional side elevation of Figure 4, taken on the line 1-2:
In carrying my invention into practice I construct the inner portion or boss or
hub of my pulley preferably from cast steel with the three arms p² the ends or
bearing surfaces 2 of each being slightly enlarged and tapered or inclined as
clearly shewn at Figures 2 and 3. I then construct the outer shell or renewable
wearing surface P of the pulley 'with the three lugs or projections p the outer
surface or face of each lug being tapered or inclined to correspond to the tapering
surface 3 of the arms p so that when the inner portion P₁ is fitted into the outer
shell P these arms på become wedged against the tapering surfaces of the lugs or
projections pas clearly shewn at Figure 2. Holes are formed partly in the lugs
or projections and partly in the inclined surfaces of the arms p² preferably
parallel with the outer surface of the pulley so that the parts and P can be
firmly secured together by the bolts B the heads of which bear upon the
arms and the nuts which screw onto the opposite ends of the bolts bear upon
the ends of the lugs as clearly shewn at Figures 1 and 2. By this means it will
be seen that when the pulley is mounted upon the shaft S and the nuts 63 tight-
ened up the outer shell I will be firmly wedged and securely locked onto the inner
part P any lateral movement being impossible.
At Figures 4 and 5 I have shewn a slightly modified form of my pulley. In
this case instead of forming lugs or projections on the inner circumference of the
outer shell P I form the inner circumference inclined or tapering to correspond
to the taper or inclination of the ends 23 of the arms of the inner portion 1 as
clearly shewn at 26 Figure 5. Formed around that end of the outer shell where
the inner circumference decreases is the rebate or ledge p' so that when the outer
shell is fitted onto the inner portion 1" this rebate or ledge forms a bearing of the
nuts the heads 6' of the bolts B resting upon the ends of the arms p² as clearly
shewn on the drawings.
The
In some cases the outer. surface of the shell P may be extended or lengthened
so as to increase the width of the pulley and the pulleys may be formed with the
single flange p as shewn on the drawings or with a double flange or plain.
inner portion P1 may also if desired be formed cone shape instead of having arms
the outer circumference being tapered to correspond to the taper of the inner cir-
cumference of the outer shell P a hole being formed in the centre of the inner
conical portion P¹ for mounting the pulley on the shaft or axle S.
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:
CLAIMS.

page_text: consisting essentially of the outer renewable wearing shell such as P and the inner
portion or hub such as " the meeting surfaces of each being tapered or inclined
and forced together in the manner and for the purpose substantially as herein
set forth and as shewn upon the accompanying sheets of drawings.
Second-In pulley wheels fixing or securing the renewable wearing shell or
part such as P to the inner part or boss such as P" by forming lugs on the inner
circumference of the part P having inclined or tapered ends or bearing surfaces
which fit over or onto the corresponding tapered or inclined ends or bearing sur-
faces of the arms of the inner part or boss such as 11 the two parts being forced
together by bolts and nuts fitting into slots or holes formed partly in the lugs on
the outer shell P and partly in the ends of the arms of the inner part or boss P
in the manner and for the purpose substantially as herein set forth and as shewn
by Figures 1, 2 and 3.
Third: In pulley wheels fixing or securing the renewable wearing shell or
part such as P to the inner part or boss such as P by forming the inner circum-
ference of the outer shell P tapered or inclined and the ends or bearing surfaces
of the arms of the inner part or boss 1" with a corresponding incline or taper the
said parts being forced together by bolts and nuts passing through holes formed
partly in the inner inclined circumference of the outer shell P and partly in the
inclined surfaces of the arms of the inner part or boss P¹ in the manner and for
the purpose substantially as herein set forth and as shewn upon the accompanying
drawings by Figures 4 and 5.
Dated this 19th day of February 1900
GEORGE BARKER,
Fellow of the Chartered Institute of Patent Agenta,
Agent for Applicant,
77, Colmore Row, Birmingham.
GEORGE BARKER,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant,
77, Colmore Row, Birmingham.