Improvement in Wheels, Pulleys, and Sheaves.
Year: 1888

page_text: Date of Application, 28th July, 1888
Complete Specification Left, 29th Apr., 1889-Accepted. 22nd June, 1899
PROVISIONAL SPECIFICATION.
Improvement in Wheels, Pulleys, and Sheaves.
I, JOSEPH STEAD of 23 Crawford Terrace Ashton under Lyne in the Connty of
Lancaster Agent do hereby declare the nature of this invention to be as follows:-
My invention relates to wheels, pulleys and sheaves, and consists in an improved
manufacture or construction of centres or discs for the same. I form the centres out
of one or more oblong sheets of metal which I corrugate without stretching them by
any ordinarily used means for instance by means of presses, with transverse corru-
gations having a varying width and depth.; said corrugations being wider and
shallower at one side of the sheet and narrowing and deepening gradually towards the
other side, in consequence of which the sheet assumes the form of a disc with a
circular hole in the centre or of a sectoral part of such disc. The width or pitch of
the corrugations at opposite sides of the sheet is made proportional to the radii these
sides are to have in the discs or sectors to be produced, the depth being such that the
length of sheet for one corrugation remains the same across the entire width of the
sheet. A complete disc may be formed out of a single sheet of sufficient length, or
be made in two or more parts, the ends of the sheets being riveted or otherwise
attached to one another.
For making complete pulleys, wheels or sheaves I cast the naves or bosses upon the
corrugated centre, and attach the rim or tyre in any suitable ordinary way used for
attaching rims or tyres to disc centres. In some cases I cut short radial slits into the
disc round the circumference and bend these alternately to opposite sides and utilise
the lugs thus formed for attaching the rim or tyre by rivets or bolts. The outer
corrugations of the centre or discs afford a better bearing surface to the rims or tyres
than flat discs, while the increasing depth of the corrugations towards the boss imparts
great, stiffness to the disc, so that it can be made light and out of comparatively thin
sheets.
Dated this 97th dox of July 1888
EMMOTT & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvement in Wheels, Pulleys, and Sheaves.
I, JOSEPH STEAD, of 23, Crawford Terrace, Ashton-under-Lyne, in the County of
Lancaster, Agent, 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 :-
My invention relates to wheels, pulleys, and sheaves and consists in an improved
manufacture or construction of centres or discs for the same.
On the Sheet of drawings appended hereunto fig. 1 shows a side view of a pulley
with my improved centre, fig. 2 a cross section, fig. 3 an edge view of the corrugations
of the centre at the outer circumference and fig. 4 a similar view at the inner circum--
ference of the centre.
I form the centre out of one or more oblong sheets of metal which I corrugate
transversely by any ordinarily used means, for instance by means of presses, without
stretching them. I make the corrugations with a varying width and depth, the
corrugations being wider and shallower on one side of the sheet and becoming
gradually narrower and deeper towards the other side, in consequence of which the
sheet assumes the form of a disc with a circular hole in the centre, or of a sectoral
part of such disc.

page_text: The width or pitch of the corrugations a and b, indicated on fig. 1 by their
centre line only, at opposite sides of the sheet is proportional to the radii R and r, the
depth being such that the length of sheet from one corrugation to the other remains
the same across the entire width of the sheet. A complete disc may be formed out of
a single sheet of sufficient length, or be made in two parts as shewn by fig. 1, or in
more parts, the ends of the sheets being rivetted or otherwise attached to one
another.
For making complete pulleys, wheels, or sheaves, I cast the nave or boss c upon
the corrugated centre as shown on the drawings and attach the rim or tyre in any
suitable ordinary way used for attaching rims or tyres to disc centres. In some cases
I cut short radial slits into the disc round the circumference and cut away the plate
alternately between the slits and bend the lugs thus formed alternately to opposite
sides as shewn by figs. 1 and 3 and attach the rim d or tyre to the lugs e e e thus
formed by rivets or bolts.
The outer corrugations of the centre or disc afford a better bearing surface to the
rim or tyre than a flat disc does, while the increasing depth of the corrugations
towards the boss imparts great stiffness to the disc, so that it can be made light and
out of comparatively thin sheets.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,
* Centres or discs for pulleys, wheels, and sheaves, formed of sheet metal corrugated
substantially as herein described and illustrated by the drawings.
Dated this 26th day of April 1889.
EMMOTT & Co.,
Agents for the Applicant.