Improvements in Pulleys, Drums, and Surfaces for Driving Purposes.
Year: 1884

page_text: Improvements in Pulleys, Drums, and Surfaces for Driving
Purposes.
I WILLIAM NEEDHAM WILKINSON of 17 St John's Road Longsight Manchester
in the County of Lancaster Agent do hereby declare the nature of my invention
for IMPROVEMENTS IN PULLEYS DRUMS AND SURFACES FOR DRIVING PURPOSES
to be as follows:-
To obtain a maximum of speed and power with a minimum of loss I attach to
the face or periphery of the pulleys drums, or surfaces from which and to
which power is conveyed, by means of belts, bands, ropes, or straps, one or more
pieces of perforated metal, such as zinc, brass, copper, tin or any alloy or material
in any number of folds or pieces I fasten them by means of solder, rivits or bolts
& nuts in such a manner as to secure them firmly to the surfaces and so as to
allow the air which is carried in between the faces of the straps, ropes, or bands
and pulleys or surfaces to freely escape through the perforations, by that means a
better purchase is obtained by the transmitters and the slipping of them reduced
thereby gaining both power and speed. The perforations may vary in size number
or shape. I cover the whole or any part only of the surfaces as I may think best
under varying circumstances.
I do not perforate the faces of the pulleys or drums as in a patent Nod 3932/84.
My plan strengthens the pulleys or drums and provides at the same time a
means for the escape of air.

page_text: Furposes.
I, WILLIAM NEEDHAM WILKINSON of 10 St John's Road, Longsight, Manchester
in the County of Lancaster Agent do hereby declare the nature of my invention
for IMPROVEMENTS IN DRUMS, PULLEYS AND SURFACES FOR DRIVING PURPOSES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in the form of the exterior surface or
face of pulleys, drums, or shafts, from which and to which power is conveyed by
means of belt, band, rope or strap, by the addition or attachment of one or more
metallic bands or rings, to the face or periphery of such pulleys, drums, or shafts:
these said metallic bands or rings being either perforated with boles, slotted
grooved, or otherwise indented in order to obtain a maximum of speed with a
minimum of loss of power resulting from the belt slipping on the face of pulleys of
ordinary construction, and also as a means of strengthening such pulleys or drums,
particularly those that may have been some time in use, and exhibit signs of
weakness, or a mirror like surface.
In applying my invention for the purpose as herein before described I construct
metallic bands or rings either endless or in segments, of any suitable thickness and
material.
The internal diameter of these bands or rings are equal, or nearly equal to the
external diameter of the drum or pulley to which they are required to be
attached.
•
These rings or bands, I form of perforated metal, or I groove, indent or otherwise
produce an irregular surface on the face of the said ring or band, or they may be
made of woven or plaited wire.
I attach these metallic rings or bands to a drum or pulley either by ordinary
screws, screw bolts, rivets, solder, or other suitable means or if endless bands are
employed, such bands or rings may be shrunk on the pulley by the ring or band
being first heated, and allowed to cool when placed on the pulley, as is the usual
practice in attaching tyres to wheels; I do not groove, drill or perforate in any
way the face or periphery of the drum or pulley, except in such places as may be
necessary for the purpose of inserting bolts, screws or rivets, when preference is
given to such means of attaching the said rings or bands to the pulley.
In employing the metallic rings or bands as herein before described, and in
attaching them to drums, pulleys or other driving surfaces; I cover the whole or
part of the face or periphery of the drum or pulley with a metallic ring or band,
of any or equal width, or the required width may be obtained by two or more rings
or bands of different widths.
When a curved form of face is required, I first secure to the drum or pulley a
narrower ring or band in the centre of the face or exterior driving surface, and
place outside this, one or more broader rings or bands.

page_text: In order that my invention may be fully understood, I now describe the
accompanying sheet of drawings reference being made to the figures and letters
marked thereon. Similar letters refer to similar parts through the several views.
Fig. 1 represents a pulley of an ordinary description, the face or periphery a
being formed with a plain or smooth surface.
Fig. 2 is a metallic ring or band made of any perforated material, or if preferred
of metal having grooves or other indentations in lieu of holes.
Fig. 3 is a combination of Figs. 1 and 2 the ring or band b shown in Fig. 2,
being attached to the drum or pulley a in Fig. 1. The inner surface of the
pulley a, is shown perfect and entire and not weakened with holes c or any sort of
perforation. The outer surface which is formed by the addition or attachment of
the perforated or otherwise indented metallic ring or band, or with a woven wire
ring or band, constitutes the friction or driving surface for the belt band rope or
strap.
Fig. 4 shows a pulley constructed so as to form a coned surface, by first placing
a narrower band in the centre of the face of the pulley and covering the same with
one or more broader bands.
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 I am
aware of the existence of the Specification of Letters Patent granted to James
Shepherd No. 3932 of 1884 and also that the said Specification has been twice
amended, and I wish it to be understood that I do not claim as my Invention the
perforation, spacing, or grooving of the face or periphery of pulleys and drums as
therein claimed, but what I claim is
1st To the surfaces or faces of pulleys, drums, or shafts, from which and to
which power is conveyed by means of belt, band, rope or strap, the addition or
attachment to such surfaces, of one or more metallic rings or bands, either endless
or in segments, such bands or rings being formed either of perforated metal,
or metal having grooves or other indentations on the exterior surface, or of
woven or plaited wire, for the purpose of obtaining a maximum of speed with a
minimum of loss of power resulting from the belt slipping on the face of pulleys of
ordinary construction, substantially as herein before set forth and described.
Dated this 8th day of September 1885.

page_text: I WILLIAM NEEDHAM WILKINSON of 17 St John's Road Longsight Manchester
in the County of Lancaster Agent do hereby declare the nature of my invention
for IMPROVEMENTS IN PULLEYS DRUMS AND SURFACES FOR DRIVING PURPOSES
to be as follows:-
To obtain a maximum of speed and power with a minimum of loss I attach to
the face or periphery of the pulleys drums, or surfaces from which and to
which power is conveyed, by means of belts, bands, ropes, or straps, one or more
pieces of perforated metal, such as zinc, brass, copper, tin or any alloy or material
in any number of folds or pieces I fasten them by means of solder, rivits or bolts
& nuts in such a manner as to secure them firmly to the surfaces and so as to
allow the air which is carried in between the faces of the straps, ropes, or bands
and pulleys or surfaces to freely escape through the perforations, by that means &
better purchase is obtained by the transmitters and the slipping of them reduced.
thereby gaining both power and speed. The perforations may vary in size number
or shape, I cover the whole or any part only of the surfaces as I may think best
under varying circumstances.
I do not perforate the faces of the pulleys or drums as in a patent Nod 3932/84.
My plan strengthens the pulleys or drums and provides at the same time a
means for the escape of air,

page_text: COMPLETE SPECIFICATION.
Improvements in Pulleys, Drums, and Surfaces for Driving
Purposes.
I, WILLIAM NEEDHAM WILKINSON of 10 St John's Road, Longsight, Manchester
in the County of Lancaster Agent do hereby declare the nature of my invention
for IMPROVEMENTS IN DRUMS, PULLEYS AND SURFACES FOR DRIVING PURPOSES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in the form of the exterior surface or
face of pulleys, drums, or shafts, from which and to which power is conveyed by
micans of belt, band, rope or strap, by the addition or attachment of one or more
metallic bands or rings, to the face or periphery of such pulleys, drums, or shafts:
these said metallic bands or rings being either perforated with holes, slotted
grooved, or otherwise indented in order to obtain a maximum of speed with a
minimum of loss of power resulting from the belt slipping on the face of pulleys of
ordinary construction, and also as a means of strengthening such pulleys or drums,
particularly those that may have been some time in use, and exhibit signs of
weakness, or a mirror like surface.
In applying my invention for the purpose as herein before described I construct
metallic bands or rings either endless or in segments, of any suitable thickness and
material,
The internal diameter of these bands or rings are equal, or nearly equal to the
external diameter of the drum or pulley to which they are required to be
attached.
These rings or bands, I form of perforated metal, or I groove, indent or otherwise
produce an irregular surface on the face of the said ring or band, or they may be
made of woven or plaited wire.
I attach these metallic rings or bands to a drum or pulley either by ordinary
screws, screw bolts, rivets, solder, or other suitable means or if endless bands are
employed, such bands or rings may be shrunk on the pulley by the ring or band
being first heated, and allowed to cool when placed on the pulley, as is the usual
1ractice in attaching tyres to wheels; I do not groove, drill or perforate in any
way the face or periphery of the drum or pulley, except in such places as may be
necessary for the purpose of inserting bolts, screws or rivets, when preference is
given to such means of attaching the said rings or bands to the pulley.
In employing the metallic rings or bands as herein before described, and in
attaching them to drums, pulleys or other driving surfaces, I cover the whole or
part of the face or periphery of the drum or pulley with a metallic ring or band,
of any or equal width, or the required width may be obtained by two or more rings
or bands of different widths.
When a curved form of face is required, I first secure to the drum or pulley a
narrower ring or band in the centre of the face or exterior driving surface, and
place outside this, one or more broader rings or banda,

page_text: In order that my invention may be fully understood, I now describe the
accompanying sheet of drawings reference being made to the figures and letters
marked thereon. Similar letters refer to similar parts through the several views.
Fig. 1 represents a pulley of an ordinary description, the face or periphery a
being formed with a plain or smooth surface.
Fig. 2 is a metallic ring or band made of any perforated material, or if preferred
of metal having grooves or other indentations in lieu of holes.
Fig. 3 is a combination of Figs. 1 and 2 the ring or band 6 shown in Fig. 2,
being attached to the drum or pulley a in Fig. 1. The inner surface of the
pulley a, is shown perfect and entire and not weakened with holes c or any sort of
perforation. The outer surface which is formed by the addition or attachment of
the perforated or otherwise indented metallic ring or band, or with a woven wire
ring or band, constitutes the friction or driving surface for the belt band rope or
strap.
Fig. 4 shows a pulley constructed so as to form a coned surface, by first placing
a narrower band in the centre of the face of the pulley and covering the same with
one or more broader hands..
•
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
1st To the surfaces or faces of pulleys, drums, or shafts, from which and to
which power is conveyed by means of belt, band, rope or strap, the addition or
attachment to such surfaces, of one or more metallic rings or bands, either endless
or in segments, such bands or rings being formed either of perforated metal,
or metal having grooves or other indentations on the exterior surface, or of
woven or plaited wire, for the purpose of obtaining a maximum of speed with a
minimum of loss of power resulting from the belt slipping on the face of pulleys of
ordinary construction, substantially as herein before set forth and described.
Dated this 8th day of September 1885.