Improvements relating to Pullies.
Year: 1897

page_text: Date of Application, 16th July, 1897-Accepted, 21st Aug.,
1897
COMPLETE SPECIFICATION.
Improvements relating to Pullies.
I, EDWARD SCHMITZ, of 25, Schozen Strasse, München-Gladbach, in the Empire
of Germany, Manufacturer 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 has reference to pullies for use in transmitting motion by belting
or for other similar and other purposes, and has for its object to produce a pulley having
the qualities of strength and economy in production.
My invention consists in a pulley made as hereafter described.
The accompanying drawings illustrate the application of the invention in which
Figures 1 and 2 are elevation and part plan respectively of a small pulley made in
accordance with this invention.
Figures 3 and 4 show details upon a larger scale.
b
In carrying the invention into effect as illustrated in the drawings the pulley is
constructed in such a manner that the boss a and spokes 6 are made of iron, while
the rim c is provided from wood curved to a proper circular form. The connection
between the spokes and the rim is effected by cross-pieces d represented in detail
elevation and plan in Figure 3, having a boss e into which the extremity of the
spoke d is forced the connection being completed by means of counter sunk screws f
within holes f as illustrated.
It is obvious that the boss may be made of either wrought or cast iron and in
the case of larger pullies which are cast supplementary spoke rods are cast in the
boss, having their outer extremities at a determinate distance from the centre to
hold the rim in a circular position.
The boss a is formed in two equal segmental parts which have radial extensions
on either side, so that upon the parts of the boss being placed together the radial
extensions fall one upon the other and form the main spokes which serve by means
of suitably provided bracket pieces a¹, at their extremities to retain the extremities
The radial extensions forming the
of the segmental circularly curved wood rims c.
spokes are bolted together by means of the bolts h as illustrated, and firmly hold
the extremities of the wood rim c in tail recesses at their extremities a¹ the
connection being firmly and positively made by means of bolts g as illustrated.
For similar pullies the boss a and its extensions are made of malleable iron and
for light pullies tubes are used instead of bar iron for the main and supplementary
spokes.
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:-
1. A pulley having wooden rims in which the connection of the rims is effected
by means of recesses a¹ provided upon extensions of the boss, the rim being further
supported by supplementary spokes b connected thereto by cross pieces d and
screws f substantially as and for the purpose hereinbefore described,

page_text: 2. Improvements relating to pullies substantially as and for the purpose herein-
before described.
Dated this 15th day of July 1897
MARKS & CLERK,
18, Southampton Buildings, Chancery Lane, London, W.C., and
13, Temple Street, Birmingham, Agents.