Improvements in the Surfaces or Heads of Pulleys, Wheels, Brakes, and the like.
Year: 1891

page_text: Date of Application, 27th Nov.. 1891
Complete Specification Left, 25th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Surfaces or Heads of Pulleys, Wheels, Brakes,
and the like.
I, JOHN CARTER, of 41 Exeter Villas, Whateley Road, Handsworth in the
County of Stafford, Gentleman do hereby declare the nature of this invention to
be as follows:-
:-
This invention has reference more particularly to band pulleys, grooved pulleys,
and wheels with one flange.
In a band pulley round the periphery at equal distances apart I form dove-tail
pieces in one with the pulley casting and preferably of the width of the face of the
same, projecting a distance above the rim, the said dove-tail pieces forming grooves
round the periphery of the pulley.
Into each of the said grooves I drive a piece of wood, compressed or otherwise,
the face of which projects beyond the said dove-tail pieces and so forming alter-
nately a wood surface and a space round the pulley.
A pulley made according to my invention will prevent (as is now often the case)
the band from slipping and will be very applicable to those pulleys which are
driven at a great speed.
In applying my invention to a double flanged pulley suitable for cable or other
purposes I form a casting with inverted V shaped pieces round the periphery from
Hange to flange, between which I fix wood blocks (compressed or otherwise) by
means of pins or screw the joints of said wood blocks to be preferably opposite
each inverted V shaped piece, and so form a continuous wood surface on which the
cable bears when running. This will prevent much of the wear and friction as in
the case of metal pulleys and will also be comparatively free from noise when the
cable is in motion.
I also form if desired a pulley with a semi-circular or other shaped groove so as
to allow the cable or band to run therein.
My invention is also applicable to pulleys with one flange working on a vertical
or other spindle such as are used on cable tramways for carrying the cable round
sharp curves.
I also apply my invention to railway and like wheels and to brake blocks used
for same.
I can make the love tail manuae hereinhofare mentioned of different shanes
COMPLETE SPECIFICATION.
Improvements in the Surfaces or Heads of Pulleys, Wheels, Brakes,
and the like.
1, JOHN CARTER, of 41 Exeter Villas, Whateley Road Handsworth in the
County of Stafford Gentleman 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 more particularly to band pulleys and other wheels.
In a band pulley round the periphery at equal distances apart I form dove-tail
pieces in one with the pulley casting and preferably of the width of the face of the
same projecting a suitable distance above the rim the said dove-tail pieces forming
grooves round the periphery of the pulley.
Into each of the said grooves I drive a piece of wood (compressed or otherwise)

page_text: the face of which projects beyond the said dove-tail pieces and so forming
alternately a wood surface and a space round the pulley.
In applying my invention to a double flanged pulley suitable for cable or other
purposes I form a casting with inverted V shaped pieres round the periphery from
flange to flange between which I fix wood blocks by means of pins or screws the
joints of which to be preferably opposite cach, inverted V shaped piece and so form
a continuous wood surface on which the cable bears when running.
I also form a pulley if desired with a groove of a semicircular shape.
My invention is also applicable to pulleys with one flange working on a vertical
shaft, such as are used for carrying cables round corners.
1 can also apply my invention to railway and like wheels.
i
In referring to the accompanying drawing Fig. 1 shews a sectional side view of
a pulley, Fig. 2 is an end view of the same, Fig. 3 shews a section of a pulley
having two flanges and an end view of same, Fig. 4 shews a sectional side view of
a grooved pulley, Fig. 5 being a cross section of the same, and, Fig. 6 is a pulley
applicable to vertical shafts.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
Referring firstly more particularly to Figs. 1 and 2, A is the pulley casting
round the periphery of which are projections a preferably dove-tail shape and so
forming grooves into which I fix blocks of wood C (compressed or otherwise) and
projecting above the said dove-tail projections a and so forming spaces e between
each wood block C and thereby giving a better grip to the band when the pulley is
running at a slow or great speed.
In applying my invention to double flanged pulleys (see Fig. 3) the wheel
casting A is formed with flanges a a² and cast with the said flanges at certain
intervals are inverted V shaped pieces D, the same projecting about half way up
the inner side of the flanges a a². Into the grooves formed by said inverted
V shaped pieces D I fix blocks of wood E the ends of which butt together and
form a joint e thereby making a continuous rim of wood. The said blocks E are
fastened in place by bolts el passing through the said flanges a' a and blocks E, or
by means of screws as shown for instance in Fig. 6.
In a grooved pulley (see Figs. 4 and 5), the wood blocks G are fitted into similar
grooves to those shewn in Fig. 3, and are grooved out at to allow a rope or cable
to run therein. The said grooved block G being fitted in a flanged rim H and are
fastened in place by said bolts c³.
Fig. 6 shews a pulley for a vertical shaft, I being a rope or cable running round
the said pulley and resting on the flange a³. The said wood blocks E can also be
applied to railway and other wheels in which case they are made similar in shape
to those shewn in Fig. 3, but with only one flange.
I do not bind myself to the exact representations shewn on the accompanying
drawing.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1st. In a pulley a series of wood blocks, let into grooves round the periphery,
said grooves formed by dove-tail pieces and in combination with a series of spaces
substantially as herein described and illustrated by. Figs. 1 and 2 of the accom-
panying drawing.
2nd. A rim of wood blocks applicable to pulleys and other wheels fixed into
grooves between inverted V pieces round the periphery, and fastened by means of
bolts or screws substantially as herein described and. illustrated by Figs. 3, 4, 5
and 6 of the accompanying drawing.