Improvements in Sheave Mountings for Aerial Ropeways.
Year: 1896

page_text: Date of Application, 10th June, 1896
Improvements in Sheave Mountings for Aerial Ropeways.
We, JOHN PEARCE ROE and THE ROPEWAYS SYNDICATE LIMITED, both of
150 Leadenhall Street, in the City of London, Engineers, do hereby declare the
nature of this invention to be as follows:-
This invention has reference to a construction of sheave mounting for aerial
ropeways designed to afford greater facilities for renewal and lubrication of the
sheave and its bearing than the sheave mountings heretofore in use and which,
whilst giving as effective a support for the sheave as the earlier arrangements,
obviates the necessity of dishing the centre of the sheave in order to bring its
main bearing under the tread of the sheave and thus under the cable working
thereon.
According thereto the sheave mounting comprises a pedestal or bracket adapted
to receive one end of a pin the other end of which projects outward and serves as a
fixed beating for the rotary sheave which is held endways in place thereon and is
of ordinary plain form, that is to say without a dished centre, the bore in the
pedestal or bracket being larger in diameter than the pin and provided at two
points around its circumference with narrow bearing surfaces against which the pin
is held by suitable tightening up devices, the arrangement being such that normally
the pin is firmly fixed at three points around its circumference, but upon releasing
the tightening up devices, it is immediately released even though it may have
become rusted, and can be easily removed with the sheave thereon and be replaced
if necessary, by another pin and sheave. The lubrication of the bearing is effected
through a passage which serves to conduct semi-solid or liquid lubricant to the
lower side of the pin which is not subjected to pressure.
In one arrangement of this kind, the pedestal or bracket is provided at or near
each end of its bore with two bearing surfaces for the pin which is fixed in place
thereon by two set screws, one of which is adapted to enter a conical or other
suitably shaped recess in the pin and so hold the same in proper position both in an
endways and circumferential direction. The pin is provided at its central portion
with a collar or enlargement that bears at one side against the pedestal or bracket.
The sheave is mounted to rotate upon the outwardly projecting portion of the pin
between the said collar or enlargement thereon and a removable collar which is
secured by a split pin or other suitable means to the bearing pin.
To the central collar or enlargement of the bearing pin is secured a suitable
lubricator that communicates with the upper end of a lubricant passage that extends
in an outward and downward direction in the outer portion of the pin and
communicates at its lower end with one or more lubricant distributing grooves
which may communicate with an annular recess around the pin.
Sheave mountings of the kind described can be applied direct to the trestles used
in aerial ropeways, and also to the balance or compensating beams or levers used in
such ropeways.

page_text: We, JOHN PEARCE ROE and THE ROPEWAYS SYNDICATE LIMITED, both of
150 Leadenhall Street, in the City of London, Engineers, 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 has reference to a construction of sheave mounting for aerial
ropeways designed to afford greater facilities for renewal and lubrication of the
sheave and its bearing than the sheave mountings heretofore in use, and which,
whilst giving as effective a support for the sheave as the earlier arrangements,
obviates the necessity of dishing the centre of the sheave in order to bring its main
bearing under the tread of the sheave and thus under the cable working thereon.
According thereto the sheave mounting comprises a pedestal or bracket adapted
to receive one end of a piu the other end of which projects outward and serves as a
fixed bearing for the rotary sheave which is held end ways in place thereon and is of
ordinary plain form, that is to say without a dished centre, the bore in the pedestal
or bracket being larger in diameter than the pin and provided at two points around
its circumference at each end with narrow bearing surfaces against which the pin is
held by suitable tightening up devices, the arrangement being such that normally
the pin is firmly fixed at three points around its circumference at each end, but
upou releasing the tightening up devices, it is immediately released even though it
may have become rusted, and can be easily removed with the sheave thereon and
be replaced if necessary, by another pin and sheave. The lubrication of the
bearing is effected through a passage which serves to conduct semi-solid or liquid
lubricant to the lower side of the pin which is not subjected to pressure.
Fig. 1 of the accompanying drawings shows partly in side elevation and partly
in longitudinal section one construction of sheave mounting according to this
invention part of a sheave carried by such mounting being indicated in
dotted lines.
Fig. 2 shows the sheave mounting in end elevation.
In this arrangement 1 is the pedestal or bracket provided at or near each end of
its bore 2 with two bearing surfaces 3 for the sheave or bearing pin 4 which is fixed
in place on the two pairs of bearing surfaces by two set screws 5, 5, one of
which viz. 5, is adapted at its inner end to enter a conical or it may be other
suitably shaped recess 6 in the pin and so hold the same in proper position both in
an end ways and circumferential direction. The pin 4 is provided at its central
portion with a collar or enlargement 7 that bears at one side against the pedestal
or bracket 1. The sheave 8 is mounted to rotate upon the outwardly projecting
portion of the pin 4 between the said collar or enlargement 7 and a removable
collar 9 which is secured by a split pin 10 or other suitable means to the
bearing pin.
To the central collar or enlargement 7 is secured a suitable lubricator 11 that
communicates with the upper end of a lubricant passage 12 which extends in an
outward and downward direction in the outer portion of the pin and communicates
at its lower end with a lubricant distributing groove 13, or there may be more than
one such groove, in the lower surface of the pin and which groove or grooves, may
communicate with an annular recess not shown, around the pin.
Sheave mountings constructed as described can be applied direct to the trestles
used in aerial ropeways, and also to the balance or compensating beams or levers
used in such ropeways. Fig. 3 is an end elevation showing one end of such a beam
or lever constructed to form a sheave mounting of the kind hereinbefore described,

page_text: the pedestal or bracket 1 being cast in one piece with the end of the beam or
lever 14.
Having now particularly described and ascertained the nature of the said inven-.
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A sheave mounting for aerial ropeways, comprising a pedestal, bracket or
beam end and a pin carried by and projecting therefrom, the bore of the pedestal
or bracket being made larger in diameter than the pin and provided at points
around its circumference with narrow bearing surfaces against which the pin is held
by tightening up devices, the arrangement being such that normally the pin is fixed
at separate points around its circumference but that upon releasing the tightening
up devices it will be immediately released and can be readily removed and replaced,.
substantially as herein described for the purposes specified.
2. Sheave mountings for aerial ropeways, constructed substantially as described
and shown.