Improvements in the Construction of Pullies.
Year: 1894

page_text: Date of Application, 16th June, 1894-Accepted, 21st July, 1894
COMPLETE SPECIFICATION.
Improvements in the Construction of Pullies.
I, JOHN PARTINGTON, of Water Lane Boiler Works, Thornton Road, Bradford,.
in the County of York, Boiler Maker, 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 certain improvements in driving pullies, and has for its
object, the construction of same in such a manner, that, while retaining the
necessary required strength according to the power to be transmitted, the weight
of the pulley is considerably reduced, and consequently a great saving in material,
and the cost of manufacture.
I accomplish my object by dispensing with the ordinary heavy arms, and
construct the pulley out of rolled sheet metal, which I corrugate, or emboss in any
suitable manner, for the purpose of obtaining increased strength in proportion to
the reduction in weight.
In order that my invention may be fully understood I will describe the same in
detail by making reference to the accompanying sheet of drawings in which
Fig. 1 represents a side view of my improved pulley.
Fig. 2 is an end view of same partly in section.
In all the figures similar letters indicate similar parts where they appear.
The boss A. of the pulley, may be of cast or wrought metal, and is formed and
secured on the shaft B. in any convenient manner. In Figures 1 and 2, I shew the
rim C. connected to the boss A. by two metal discs D. D. which are embossed
at D' for the purpose of obtaining increased strength. The rim C. is also formed
of rolled plate, having the edges bent round at C' for the purpose of adding
strength, and also prevents the belt from being cut, when in the act of being
removed from, or placed on the pulley. The said rim C. may be embossed in any
suitable manner, for example, as shewn at C' by Figs 2, and 3. which will
considerably add to the strength of such rim.
In Fig. 3 the rim C. is supported by a single corrugated, or embossed, disc D.
the rim C. being rivetted or secured to the disc D. in any suitable manner.
Fig. 4 illustrates one of my improved pullies in which one disc D. and part of
rim C. are stamped or rolled out of one plate, and embossed as at D'. The two
sections are connected together at the rim, by strip E. or in any other convenient
manner, and secured to the boss in the manner as before described.
Fig. 5 is a similar arrangement but with the two discs D. D. rivetted together.
Figs. 6, 7, 8 and 9 are modifications shewing how the plates may be bent for
constructing pullies in accordance with my invention.
In pullies of great width, I insert furrels or stays F. between the discs D. D.,
and secure same therein by a bolt, or rivet passing through same somewhat as shewn
by Fig. 7 thus attaching the two discs together and giving solidity to the same.
It will be easily understood that the corrugated or embossed discs D. forming
the support between the boss A. and rim C. may be formed in halves, or segments,
and connected together in any convenient manner by strips and bolts or screws.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is,
The construction of pullies out of rolled sheet metal having embossed discs in
lieu of arms and plain or embossed rims or peripheries formed from the same plate

page_text: as the disc, or discs, or of a separate plate, or plates, all arranged substantially in
the manner as shown and described.
Dated this 13th day of June 1894.
JOHN WAUGH,
Agent for Applicant.