Improvements in Driving Belts and Pulleys.
Year: 1887

page_text: Date of Application, 21st Jan., 1887
Complete Left, 17th Nov., 1887
Complete Accepted, 20th Dec., 1887
Improvements in Driving Belts and Pulleys.
I, WILLIAM LAIDLAW PURVES, of Hardwicke Cottage, The Common, Wimbledon,
Doctor of Medicine, do hereby declare the nature of this invention to be as
follows
―:
It consists in
(1) The use of belting consisting of a single wire or a combination of wires with
projections corrugations or apertures on its surface or surfaces.
(2) The application theroof to pulleys having corresponding indentations, corru-
gations, or projections, either on the surfaces of the peripheries, or on the surfaces of
a straight, sinuous, or wedgeshaped groovo or grooves on the peripheries.
(3) The application of belting consisting of a wire, or a combination of wires,
having flat, rounded, V or U shaped surfaces to pulleys having a sinuous or wodge-
shaped groove or grooves on the pulley peripheries.
(4) The application of belting consisting of a strip or strips of metal having
projections, corrugations, or apertures on the surface or surfaces to pulleys having on
their peripheries a straight, sinuous, or wedgeshaped groove or grooves with
corresponding indentations, corrugations or projections on their surface or surfaces.
(5) The application of belting consisting of a strip or strips of metal with or
without projections or corrugations to pulleys having a sinuous or wedgeshaped
groove or grooves on the peripheries.
(6) The application of belting made of leather, gut, dermatine, India-rubber, gutta
percha, rope, or other such like material, and having projections or corrugations on
its surface or surfaces to pulleys having corresponding indentations or corrugations
on the surface or surfaces of a straight, sinuous, or wedgeshaped groove or grooves
on the peripheries.
(7) The application of belting as described in paragraph (6) to pulleys having a
sinuous groove or grooves on the peripheries.
(8) The use of belting consisting of a combination of a wire or wires of metal with
a strip or strips of metal, and with or without projections, corrugations, or apertures
on the surface or surfaces.

page_text: (9) The use of belting consisting of a combination of the above described wire
belts with non-metallic materials, such as leather, hemp, India rubber, gut, gutta
percha, and with or without projections, corrugations, or apertures, on its surface
or surfaces.
(10) The application of such combined belting as described in paragraphs (8)
and (9) to pulleys having corresponding indentations, corrugations, or projections,
either on the surfaces of the peripheries, or on the surface or surfaces of a straight,
sinuous, or wedgeshaped groove or grooves on the peripheries, or to a plain sinuous,
or wedgeshaped groove or grooves on the peripheries.
(11) The use of pulleys which have for the purpose of deadening sound vibrations
a layer or layers of non-metallic substance, such as leather, paper, felt, canvas,
Indiarubber placed between the peripheries of the pulleys and the layer of corrugations
or projections attached to the pulleys.
(12) The application of yielding material, India rubber, leather, or such like, to
the groove or grooves on the pulleys.
(13) The projections or corrugations on the belts are either parts of the belts
themselves, or consist of metallic or non-metallic materials attached to them, and
extend over the whole length and breadth of the belt, or over a portion or
portions only.
(14) The indentations, corrugations, or projections on the pulley peripheries are
parts of the wheels themselves, or morticed to them, or consist of strips of material
attached to the pulleys. They extend over the whole length or breadth of the
periphery, or ovor a portion or portions only.
(15) The metallic materials may be galvanised or not.

page_text: I, WILLIAM LAIDLAW PURVES of Hardwicke Cottage, Wimbledon Common,
Doctor of Medicine 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 for the purpose of obtaining an extended toothed gearing, so that
a short belt may be obtained, with a lessening of friction and slipping, uniformity of
action, and economy of space.
It consists in
1. The use of belting consisting of a single wire or a combination of wires with
projections, corrugations or apertures on its surface or surfaces.
2. The application thereof to pulleys having corresponding indentations corrugations
or projections, either on the surfaces of the peripheries, or on the surfaces of a straight
sinuous, or wedgeshaped groove or grooves on the peripheries.
If several wires be used they are platted, or bound, or woven together, and so
arranged that if applied to pulleys with projections on its surfaces, the apertures in
the belt act on these projections.
The corrugations on the belt are formed by crimping the wire or wires of
the bolt.
The wires may consist of various metals, but hard steel wire is preferred.
The projections are made by weaving or platting the wires so that the edges of the
belt project more widely at some parts than others, or consist of materials woven into
the belt, as by passing one or more wires through a metallic or non-inetallic ball or
balls, and so arranging them that they act as cogs on the corresponding projections
or indentations, on the pulley side checks or surfaces to which they are applied.
3. The application of belting consisting of a wire or a combination of wires, having
flat, rounded, V, or U shaped, surfaces to pulleys having a sinuous or wedgeshaped
groove or grooves on the pulley peripheries.
4. The application of a belting consisting of a strip or strips of metal, having
projections, corrugations or apertures on the surface or surfaces, to pulleys having on
their peripheries a straight, sinuous, or wedgeshaped groove or grooves with
corresponding indentations, corrugations, or projections on their surface or surfaces.
The metal belt may be of tempered steel with projections on its sides, which act
upon projections on the side cheeks of the pulleys; or with transverse or oblique
corrugations acting on corresponding corrugations on the pulley surfaces; or having
apertures which act upon projections or teeth formed in, or placed upon, the pulley
surfaces.
5. The application of belting consisting of a strip or strips of metal with or without
projections or corrugations to pulleys having a sinuous or wedgeshaped groove or
grooves on the peripheries.
6. The application of belting made of leather, gut, dermatine, India-rubber, gutta-
percha, rope or other such like material, and having projections or corrugations on
its surface or surfaces to pulleys having corresponding indentations or corrugations
on the surface or surfaces of a straight, sinuous, or wedgoshaped groove or grooves
on the peripheries.

page_text: 7. The application of belting as described in paragraph 6 to pulleys having a sinuous
groove or grooves on the peripheries.
8. The use of belting consisting of a combination of a wire or wires of metal with
a strip or strips of metal, and with or without projections, corrugations or apertures
on the surface or surfaces.
By this means additional strength is given to the steel belt.
9. The use of belting consisting of a combination of the above described wire bolts
with non-metallic materials such as leather, hemp, Indiarubber, gut, guttapercha, and
with or without projections, corrugations, or apertures on its surface or surfaces.
This gives strength and elasticity. The metallic parts may be embedded in the
non-metallic parts, or applied and fixed to their surfaces.
10. The application of such combined belting as described in paragraphs 8 and 9
to pulleys having corresponding indentations, corrugations or projections, either on
the surfaces of the peripheries, or on the surface or surfaces of a straight, sinuous,
or wedgeshaped groove or grooves on the peripheries, or to a plain, sinuous, or
wedgeshaped, groove or grooves on the peripheries.
11. The use of pulleys which have, for the purpose of deadening sound vibrations,
a layer or layers of non-metallic substance, such as leather, paper, felt, canvas, or
India-rubber placed between the peripheries of the pulleys, and the layer of corru-
gations or projections attached to the pulleys.
12. The application of yielding material, India-rubber, leather or such like to the
groove or grooves on the pulleys..
13. The projections or corrugations on the belts are either parts of the belts
themselves, or consist of metallic or non-metallic materials attached to them,
and extend over the whole length or breadth of the belt, or over a portion or
portions only.
The projections or corrugations on the belting described in paragraphs 6 and 9
are formed by causing a thickening of the belt substance at intervals along its surface;
or by embedding soine hard material such as a round bar of steel or wood in the
substance, or between the layers of the belt; or fixing it to the surface or surfaces
of the belt, and so causing projections on its flat surfaces or edges. If the belt be
round in form, as when a rope is used, simple knotting may be used.
14. The indentations, corrugations, or projections on the pulley peripheries are
parts of the wheels themselves, or morticed to them, or consist of strips of materials
attached to the pulleys, such as wire, wood, rope, steel &c. They extend over the
whole length or breadth of the periphery, or over a portion or portions only.
The projections on the belts or pulleys may have a variety of configurations
and shapes.
15. The metallic materials may be galvanised or not.
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. The use and application for transmitting motion between pulleys or drums
of belting, plain or toothed,-other than Starleys spring coil belting, vide
Specification No. 6283, 1885, and Adie's corrugated steel belting, vide Specification
No. 6642, 1885, to pulleys having indentations, corrugations or projections on their
peripheries, and with or without grooves, substantially as described above in
paragraphs 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, or any mere modification thereof.
Secondly. The use of pulleys as above described in paragraphs 11 and 12, for the
purpose of deadening sound vibrations, or any mere modification thereof.
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