Improvements in Driving Pullies and Drums.
Year: 1885

page_text: COMPLETE SPECIFICATION.
Improvements in Driving Pullies and Drums.
We ALBERT HOUSE of 16 Port Street Openshaw, near Manchester in the
County of Lancaster, Engineer and ARTHUR COLLINGS WELLS of 4 Garden Street,
Withy Grove Manchester, aforesaid Engineer do hereby declare the nature of the
said Invention for "
IMPROVEMENTS IN DRIVING PULLIES AND DRUMS" and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement and accompanying drawings:-
Our said Invention relates to pullies and drums employed in the transmission of
rotatory motion and more particularly to the pullies used in rope driving. The
principal objects of our Invention are to produce light and strong rope pullies inade
of cast or wrought iron or steel and to render ordinary belt pullies capable of being
employed in rope driving. Our improved pulley is in the first instance made with
a plain rim as when intended for belt driving. To transform such a pulley into
a rope driving pulley we secure one or two or any greater number of rings of
suitable section upon its periphery so as to provide a groove or grooves for the
reception of the driving rope or ropes.
And in order that our Invention may be fully understood we have attached
hereto a sheet of drawings to which we will refer in this place. In the said
drawings Fig. 1 represents a side view and Fig. 2 a front view of a drum con-
structed in accordance with our Invention. In the said Figs. a is the wrought
iron or steel rim which is connected by means of wrought iron or steel spokes b.
with the cast metal hub c. which in the example is made in two halves which are
secured together by means of bolts d. d. Upon the rim a. are secured rings e. c.
which are made of cast iron or of wrought iron or steel as preferred. Each ring is
made with a groove to grip a rope and is either formed as a complete ring or is
made in sections, which fit together to form a ring. The ring or each section of the
ring is secured to the rim a. of the pulley by means of screws f. or by means of
bolts or rivets or by suitable means. Any required number of such rings may be
secured upon the pulley according to the requirements. The groove in each ring
may be formed in the operation of casting or by turning in a lathe or when made
of wrought iron or steel may be produced in the operation of rolling the bars,
or corrugated plates from which the ring is made. Instead of a wrought iron or
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page_text: built pulley as described the pulley to which the said grooved rings are applied
might be an ordinary cast iron belt pulley. In some instances half of the pulley
might be used for rope driving and the other half for a belt as shown in Figs. 1
and 2 or the rings could be made removable.
The sections shown in Figs. 3 to 7 illustrate several methods of forming these
grooved rings from wrought iron or steel plates or bars. In Fig. 3 a plate is
rolled or shaped into a corrugated form so as to produce three grooves. In Fig. 4
a ring having only one groove is formed in a similar manner. In Fig. 5 each ring
is made of a bar of wrought iron or steel rolled to the section which appears in the
drawing and bent into a ring or into sections to combine to form a ring. In Fig. 6
the bar of iron or steel is rolled of sufficient width to have three grooves. The
bar may be rolled with only two grooves or with more than three. In Fig. 7 the
ring is made by uniting two rings h. and . which are made from wrought iron or
steel bars or are produced by casting. The two rings meet at the centre line k.
and in the meeting faces are formed tee recesses to receive the heads of bolts l.
which enter partly into one ring and partly into the other the complete ring being
secured to the pulley by tightening the said bolts. In place of the bolts l. screws
or other suitable fastenings may be used and if preferred the two parts h. and i.
may be riveted together before being secured to the rim of the pulley. Separate
rings made as in Fig. 7 may also be secured to the rim by means of screws or
rivets instead of by tee headed bolts as shown.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
1. The pulley or drum provided with grooved rings attached to its periphery the
whole being constructed substantially as and for the purpose set forth and
indicated.
2. The grooved rings for application to the peripheries of cast iron or wrought
iron or steel pullies, drums or wheels substantially as and for the purpose set forth
and indicated.
3. The method of converting ordinary belt pullies or drums into rope pullies or
drums by the attachment of the grooved rings hereinbefore described and illustrated
in the drawings.