Improvements in or connected with Driving Pulleys or Drums.
Year: 1893

page_text: Date of Application, 28th Jan., 1898
Complete Specification Left, 28th Oct., 1893—Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Driving Pulleys or Drums.
I, GEORGE WILLIAM ELLIOTT, of Meersbrook Park Road, Heeley, Sheffield,
in the County of York, Mining and Mechanical Engineer, do hereby declare the
nature of this invention to be as follows:-
An improved method or manner of forming or constructing driving pulleys or
drums of steel, iron or other suitable metal or material.
In forming or making a pulley or drum according to this invention. I use a thin
sheet of iron, steel or other material, of the requisite diameter and thickness which
Baid disc or sheet is pressed, stamped, or by similar means dished to the con-
figuration, sectional or otherwise, required, and in such a manner that the outer
portion of disc or sheet is turned over to form half, or a portion, of the rim or face
of pulley or drum.
After the outer edges have been trued up, or similarly treated, and a hole or
opening in the centre of plate or disc of suitable size provided, I take two of tho
said discs or dished plates and place them with their outer edges together, the
two turned up or over portions or parts forming or constituting the rim or face.
These plates or discs are secured firmly to each other by rivets, bolts, annular
rings, or any approved mechanical device.
A centre boss or hub is provided, of suitable material and design, and having
the necessary flanges, lugs, or attachments for securing the boss or hub to the said
discs or plates.
B
When the drum or pulley is required to be in halves, the discs or plates are
formed of a semicircular shape and provided with a flange or other arrangement
for joining the same together. The boss or hub is also made in halves, and
connected by scraws, bolts, or their equivilent.
If considered advantageous, the boss or hub-may be made in four or more parts
or segments, the drum body being then formed of four semidisos suitably
attached.
On the rim or face of pulley there may be formed corrugations or serrations,
placed square across, diagonally or otherwise, the face of said pulley to give
additional adhesive or gripping power. These may be formed by and during the
pressing or stamping process, or by separate means, and may be continued any
width and depth.
Dated this 23rd day of January 1893.
COMPLETE SPECIFICATION.
Improvements in or connected with Driving Pulleys or Drums.
I, GEORGE WILLIAM ELLIOTT, of Meersbrook Park Road, Heeley, Sheffield,
in the County of York, Mining and Mechanical Engineer 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 :—
An improved method of forming or constructing driving pulleys or drums of
steel, iron or other suitable metal.
To illustrate and show the principle of my invention, I have annexed to this my
Specification a sheet of drawings and in which like letters of reference indionte
same or similar parts or details in the various figures.
It will be ascertained from the drawings that I form the pulley or drum.

page_text: preferably of two thin sheet discs A, of steel or iron which can be pressed or
stamped or formed by other means to the required configuration. The rim or
face B, of the pulley or drum is formed out of, by and is part of the same plates
which constitute the webs or discs A, of the said pulley.
The extreme outer edge or periphery C of the discs or plates A, thus stamped
or formed are joined or brought together forming a butt joint, and secured in that
position by a strip D, or detached pieces D of suitable metal, attached and
secured to the internal periphery of said face or rim B, by bolts, studs or rivets.
In pressing or stamping the discs A. I form on the face or rim B, corrugations,
serrations or ridges B, across the said face which adds to the gripping or adhesive
power. These corrugations or serrations can be dispensed with if considered
advantageous to do so, and the rim of pulley or drum made smooth or otherwise
as shewn by Figures 4 and 7, and rounded or square across face as may be
desired.
The disc plates A are provided in the centre with a hole or opening E, through
which is passed a boss or hub F, of suitable metal and size, and which is provided
with flanges or Ings G, around the outside of boss or hub F, and at suitable
distances apart, to which the said discs A, are attached or secured, by rivets, bolts
or their equivalents.
Figure 1, is a side elevation of the sectional view shewn by Figure 3, and the
disc plates A, are shown separate and detached by Figure 2.
In this case the disc plates A are secured together by means of rivets or bolts
through H, the webs or discs A, and instead of the annular ring D, being made
continuous, its equivalent can be formed of separate pieces Di, placed at any
required distances apart around the internal circumference.
Figures 4, 5 and 6 are modifications shewing how the pulley may be formed
when it is required to be made in halves. To do this I form the disc plates of
semicircular shape A' and A', and on the base of the semicircle I turn up the plate
or semidisc to form a lip or flange J. The boss or hub F being also made in
halves, the wholo can be secured together by bolts K, the flanges or lips G, on
boss or hub being firmly attached to semidiscs A' and A³.
The flanges J, are either bolted together or secured by ordinary mechanical
means.
Figure 7 is a side elevation of a drum having the sides or discs A. parallel
to each other the distance between being the width of the face or rim B. This
drum or pulley is shewn made in halves, but instead of the semidiscs A' and A³,
being flanged to make the joint, I placo and secure the same together by means
of an external or internal strip or strips L and form a butt joint. If preferred
the joint may be lapped over in the ordinary way. The semidiscs A³ and A'
are secured to boss or hub F, by rivets or bolts, through the plates to the flanges
or lugs G, formed on and around boss or hub F.
The joint between discs around face is made by the atrip D, being made con-
tinuous around the internal periphery, or may be made by detached pieces which
form lips as shewn by D' Figure 2.
The boss or hub F, can be made to divide and part in either direction, thus
enabling the drum to be made in four distinct parts.
This is a great advantage where large drums are concerned or where the
pulleys require fixing in confined and contracted positions.
Figure 8, shews the discs, composed of two semidises, forming the drum and
face or rin detached from boss or hub F, and separated from each other.
Openings or spaces M, may be made in the web or discplates when considered
of advantage or necessary to do so.
The corrugations or serrations B', across the face of pulloy or drum can be
applied to any other and various kinds of pulleys, where additional adhesive
power is required. These corrugations may be made the full depth from edge
to edge of pulley face, or they may be arranged to die out, diminish or disappear
towards the edges of face.

page_text: In making or constructing pulleys or drums according to my 'invention, the
corrugations are formed by the same process, and at the same time that the
discs are pressed or stamped, but if considered requisite to do so, they may be
formed by a separate and independent operation.
The accompanying sheet of drawings will shew the principle of my invention,
but I do not confine myself to all the minor details, or the configurations,
sectional or otherwise of the illustrations.
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;
1st. The use and manufacture of pulleys or drums formed of, or constructed of,
two pressed, stamped, or similarly formed dises or plates of thin sheet iron, steel
or other auitable niaterial, the said plates or discs forming or composing the rim or
face, and web or webs, having a boss or hub of suitablo material secured thereto,
substantially as shewn on drawings and described herein.
2nd. The use and manufacture of drums or pulleys, constructed substantially
as horein described and illustrated, and made of two circular discs of metal,
suitably attached or secured together, or in halves, or quarters, detachable or
otherwise.
•
3rd. The use and manufacture of pulleys or drums, constructed with, and having
corrugations or serrations formed across, on, and around the periphery of the face
or rim of the Enid pulley, and for the purpose herein described, and generally
illustrated on the accompanying sheet of drawings.
4th. The use and combination of any of the parts or configurations, herein
described and illustrated on accompanying sheet of drawings, in the manufacture
of, or the construction of pulleys or drums.
Dated this Twenty-third day of January 1893.