IMPROVED MEANS FOR TRANSMITTING MOTION BETWEEN PULLEYS OR DRUMS.
Year: 1885

page_text: I JOHN KEMP STARLEY of the Meteor Works Coventry in the county of
Warwick, Velocipede Manufacturer do hereby declare the nature of my invention
for IMPROVED MEANS FOR TRANSMITTING MOTION BETWEEN PULLEYS OR DRUMS.
to be as follows:-
This invention is designed to provide a substitute for the usual pitch chain
(which from the frictional parts contained therein is liable to elongate in the pitch
and so get out of truth with the wheel), or for the metallic bands which are liable
to break, and which improved substitute is intended to avoid such defects.
I use steel or other suitable wires coiled in one or more coils at intervals and
arranged to enter corresponding recesses in the pulleys or drums.
The wire or wires can be continuous or be made in sections for the purpose of.
hardening the coils, such sections being coupled by, suitable connections such for
instance as pieces of sheet metal gripping the ends of each opposite coil, or pair or
set of coils and rivetted together.
To assist in driving, pegs or studs may pass through the coils or through the
couplings uniting them.
Suitable recesses are made on the perepheries of the pulleys or drums for the
coils and the wire or wires to enter, and where pegs or studs are used, transverse
recesses may be made across or between the wire and coil recesses according to the
position of the pegs.
The coils are made for the purpose of allowing the wires to twist or untwist
without breaking as the pulleys or drums revolve so that the wire or wires may
spring to the form of the pulleys or drums.
By this arrangement the wire can adapt itself when passing from the curve or
form of the pulleys or drums to the straight again and so relieve the strain.
Such improved means of transmission is specially applicable for driving veloci- .
pedes or like machinery.

page_text: Improved Means for Transmitting Motion between Pulleys
or Drums.
I, JOHN KEMP STARLEY, of the Meteor Works, Coventry, in the County of
Warwick, Velocipede 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 :-
This invention is designed to provide a substitute for the usual pitch chain
(which, from the frictional parts contained therein is liable to elongate in the pitch
and so get out of truth with the wheel) or for the ordinary metallic bands which
are liable to break and this improved substitute is intended to avoid such defects.
I use steel or other suitable wire or strips coiled in one or more coils at intervals
and arranged to enter corresponding recesses in the pulleys or drums.
The wire or strip or wires or strips can be continuous or made in sections for the
purpose of hardening the coils, such sections being coupled by suitable connections
such for instance as pieces of sheet metal gripping the ends of each opposite coil or
pair or set of coils and rivetted together.
To assist in driving, pega or studs may pass through the coils or through the
couplings uniting them. Suitable recesses are made on the peripheries of the
pulleys or drums for the coils and the wire or strip or wires or strips to enter and
where pegs or studs are used, transverse recesses may be made across or between
the wire or strip and coil recesses according to the position of the pegs or studs.
The coils are made for the purpose of allowing the wires or strips to twist or
untwist without breaking as the pulleys or drums revolve so that the wire or strip.
or wires or strips may spring to the form of the pulleys or drums.
By this arrangement the wire or strip can adapt itself when passing from the
curve or form of the pulleys or drums to the straight again and so relieve the
strain.
·
Such improved means of transmission is specially applicable for driving
velocipedes or like machinery.
And in order that my said invention may be understood and carried into
practical effect I have caused to be annexed to this specification the accompanying
two sheets of drawings and now refer to the figures and letters of reference marked
thereon.
Figure 1 is a sectional elevation on line a-b of Fig. 2 of a pulley fitted with the
simplest form of iny driving cable or connection.
Figure 2 is an end elevation of the same.
Figure 3 elevation of the coupling for the ends of the wires.
Figure 4 plan of same.
Figure 5 plan of a compound connection or cable for heavier work.
Figure 6 plan of an arrangement for coupling the ends of sections of the coiled
wires when they are made in sections for convenience in hardening the coils.
Figure 7, sectional side elevation Fig. 6 on line c-d.

page_text: '
sections of wires and coils.
.
Figure 9 sectional side elevation of Fig. 8 on line e-f.
Figure 10, sectional side view (on line g-h of Fig. 11) showing a modification
wherein I substitute strips furnished with coils for the coils in the wire.
Figure 11, plan of same.
.
Figure 12, side elevation of a further modification of Figs. 1, 2, 3, 4 showing
studs substituted for pegs placed between the coils.
Figure 13, section and plan of such studs.
Referring, firstly to Figs. 1, 2, 3, 4, A is a pulley or drum, say for driving a
velocipede, B recesses in the periphery thereof. C. are spring coils formed at
suitable intervals in a wire D, the two ends E, F of which are connected by a
suitable coupling G, H. The form of coupling shown consists of two bosses G, H,
the lower edges being of the same diameter as the coils C so that this coupling can
enter and leave any of the recesses B. These bosses are secured by a pin I so that
one can oscillate thereon. The ends E, F of the wire D screw into the bosses G, H
respectively.
It will be seen that the coils C on the wire D and its coupling G, H can enter
the recesses B in the wheel A and spring to the wheel so that the coil can adapt
itself thereto when passing from the curve of the wheel to the straight again.
Fig. 5 shows a compound cable or connection having several wires with their
coils surrounding pegs J passing through each or every alternate set of coils or at
desired intervals through sets of coils.
These pegs may if desired enter corresponding grooves formed at right angles to
the coil recesses B in the drum or pulley and assist in driving. Such compound
cables or connections might be used for mill driving or for other heavy work and
the number of parallel wires and pegs and their strength must depend on the
nature of the work.
If desired to make the wires D and coils C in sections for greater convenience in
hardening them I may use a coupling device for joining the lengths as shewn in
Figures 6 to 9. I use plates K, L and after bending the ends of the wires D before
bariening, I harden them and then pass rivets or studs M through the plates K, L,
and so nip the wires D tightly between them, the bent ends of wires D abutting on
rivets or studs M.
To assist in driving I may if desired use pegs J¹ nipped between the plates K, L,
as in Figures 8 and 9, such pegs entering interdental recesses between the coil
recesses B.
I sometimes use spring strips D¹ with coils C¹ in place of wires D and coils C,
and I may couple the sections by securing the ends of the strips D' round square
or other bosses or lugs N on links O, the bosses or lugs N joining each pair of
links O.
The coils Center the recesses B, and several parallel strips and coils may be
used as in the preceding Figure 5, according to the work required and I may
further couple the links O side by side by pegs or bushes intermediate with the
coils C¹ like J in the preceding figures may also enter recesses in the wheels and
assist in driving.
If desired, I may substitute studs or bushes for pegs J and I may so make the
ends of the pegs or the studs of such a size as to alone enter the recesses in the
pulley or drum and allow the coils C, C¹ to clear the recesses, whereby they might
spring rather more freely.
As shown in Figs. 12 and 13 I use studs P which may be made in halves with
recesses into which the ends of the wires D may fit and the halves of the studs
may be then secured by rivets R.
As shewn in dotted lines on one of the links O, Figure 10, I may form studs on
the links or attached thereto so as to enter recesses in the pulley or drum, the
coils C not engaging in the recesses B, as in Figure 12.
°

page_text: The details of my invention can be considerably varied without departing from
the principle of the cable or connection formed by a spring wire or strip or parallel
wires or strips provided with coils at suitable intervals in the direction of its or
their length and arranged to spring to the peripheries of pulleys or, drums.
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:
Firstly. Transmitting motion between pulleys or drums by cables or connections
consisting of spring wires or strips having spring coils formed at intervals in the
direction of length of the cable or connection whereby the cable or connection can
spring to the pulleys or drums and adapt itself while passing from the curve to the.
straight again as described.
Secondly. The several arrangements of means or mechanism for transmitting
motion between pulleys or drums substantially as described and illustrated in the
accompanying drawings, or any mere modification thereof.
POPPLEWELL, COLTON & Co.,
Agents for the Applicant..