Improvements in and relating to Machinery Driving Belts..
Year: 1890

page_text: Date of Application, 18th Dec., 1890
Complete Specification Left, 17th Sept., 1891-Accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in and relating to Machinery Driving Belts..
I, ROBERT DICK, of Greenhead, Glasgow, Lanarkshire, Manufacturer, do
hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises improvements in and relating to
the manufacture of machinery driving belts.
"The improvements consist first, in treating textile belts which are at once woven
in the loom out of warp and weft spun yarns, either from cotton, linen, wool or
hair, or a mixture of these, to the breadths and thicknesses desired; as also belts
which are woven out of cotton or linen canvas and folded up into the breadths and
thicknesses desired, and then sewn together with rows of thread in the sewing
machine. The new treatment of these consists in heating the belts so far woven
and made, and then saturating them on one or both sides with a solution of gutta-
percha, balata, or a mixture of these with rubber in the clean raw state dissolved
in carbon disulphide or strong naphtha spirits or other equivalent solvent. And
afterwards coating these belts on one or both sides with a second coating of these
substances after the naphtha or solvents have been evaporated, from the first
coating which has sunk into the fibrous material. These belts would be so saturated
and coated with the solutions while being passed over a heating chamber, preferably
by brushing the solution into the fibres, and then passing the belts so coated up
before a strong fire, or through a heated chamber to evaporate the material and
deposit the gums well into the fibre. By a further improvement after the solvents
or spirits have been evaporated from the material by passing through heated air
chambers, a thick coating or thin layer of pure selected gutta percha, or a mixture.
of this with balata or rubber in the raw state after being highly cleaned and mixed,
would be spread on the gripping side of these belts by passing them through
between rollers while in a heated plastic state and while the solutionized surface of
the belt was also heated by previously passing in front of a fire, or through a hot
air chamber; and at the same time putting a thick strong edge of gutta-percha,
the full thickness of the belt along the edges to give wearing strength to these
parts for the action of their shifting forks, and preventing the binding selvedge
wefts of these belts from being cut, which causes them to fray out and soon give
way when not so protected. By a further improvement, I also in some cases
attach a strip of solutionized canvas round or along the side edges of these belts
so coated with the layer of gutta-percha, and attach transverse gripping strips
between these edges of canvas, leather, wool, or cork of any desired breadth to
give great gripping effect on the surface of the driving pulleys with either gutta-
percha or air spaces between them, and enable the belts to bend better over smaller
sized pulleys.
These gripping surfaces of compressed cork, leather, or wool may
also be solutionized on to the gripping surfaces of other constructions of belts,
such as canvas belts made in layers secured together by gutta-percha solution and
to leather belts.
This new treatment of these woven and textile belts unites the fibres and allows
them to bend without friction, and gives great additional strength, durability and
gripping power to the belts so treated.
Dated the 17th December 1890.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating-to Machinery Driving-Belts.
I, ROBERT DICK, of Greenhead, Glasgow, Lanarkshire, Manufacturer, do
hereby declare the nature of my invention, and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement in writing, that is to say :-
This invention has reference to and comprises improvements in and relating to
the manufacture of machinery driving belts.
The improvements consist, first, in treating textile belts which are at once.
woven in the loom.out of warp. and weft spun yarns, either from cotton, linen, wool
or hair, or a mixture of these, to the breadths and thicknesses desired; as also
belts which are woven out of cotton or linen canvas and folded up into the breadths.
and thicknesses desired, and then sewn together with rows. of thread in the sewing
machine. The new treatment of these consist in heating the belts so far woven
and made, and then saturating them on one or both sides with a solution of gutta-
percha, or balata, or a mixture of these with rubber, in the raw but cleaned state,
dissolved in carbon disulphide or strong naphtha spirits or other equivalent solvent.
And afterwards coating these belts on one or both sides with a second coating of
these substances, after the naphtha or solvents have been evaporated from the first
coating, which has sunk into the fibrous material. These belts would be so
saturated and coated with the solutions_while_or. just after being-passed-over.a.
heating chamber, preferably by passing the belt through a vessel containing the
solution and brushing it into the fibres, and then passing the belt through between
röllers, brushes, or scrapers to take any superfluous material away which would run
back into the vessel. The belts so coated are then passed before a strong fire, or
through a heated chamber to evaporate the solvent material and deposit the gums
well into the fibre.
By a further improvement after the solvents or spirits have been thus evaporated
from the belting material and the gums deposited in it. by passing through heated
air chambers, a thick coating_or_thin layer of purc_selected gutta-percha, or a
mixture of this with balata or rubber in the raw state after being hightly cleaned
and mixed, would be spread while in a heated plastic state on the gripping side of
these belts while both are being passed through between rollers and while the
solutionized surface of the belt was also heated by previously passing in front of a
fire, or through a hot air chamber; and at the same time putting a thick strong
edge of gutta-percha or gutta percha compound, the full thickness of the belt,.
along the edges which would be regulated by the rollers or edge plates between
them to give wearing strength to these parts for the action of their shifting forks,
and prevent the binding selvage wefts of these belts from being cut, which causes
them to fray out and soon give way when not so protected.
By a further improvement, I also in some cases attach a strip of one or more
thicknesses of solutionized canvas or other woven fabric round or along the side
edges of these belts so coated with the layer of gutta-percha by solutionizing one
surface of the strips and passing both between rollers while in a heated state, and
afterwards attach in an equivalent manner their transverse or diagonal gripping
strips between these edges, of canvas, leather, wool, or cork of the same thickness
as the longitudinal edge strips and of any desired breadth to give great gripping
effect on the surface of the driving pulleys with either gutta-percha or air spaces
between them, and enable the belts to bend better over smaller sized pulleys.
These gripping surfaces of compressed cork, leather, or wool, may also be
solutionized on to the gripping surfaces of other constructions of belts, such as
canvas belts made in layers secured together by gutta-percha solution and also to
leather belts.
This new treatment of these woven and textile belts unites the fibres and allows

page_text: them to bend without friction, and gives great additional strength, durability and
gripping power to the said belts so treated.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
First. The hercin described method of manufacturing machinery driving belts
consisting in saturating textile fabric belts, whether woven to the desired width
and thickness or sewn together in layers, with one or more coatings of gutta-
percha or gutta-percha compounds on one or both surfaces, substantially as and
in the manner set forth.
Second. Machinery driving belts formed from textile fabrics, whether woven to
the desired width and thickness or sewn together in layers, saturated on one or
both surfaces with one or more coatings of gutta-percha or gutta-percha compounds,
substantially as set forth.
Third. The manufacturing of machinery driving belts by saturating textile
fabric belts with gutta-percha or gutta-percha compounds and subsequently coating
or spreading a layer of these compounds over the gripping surface, and attaching
a layer or thickness of these compounds along the edges of the belt, substantially
as. and in the manner set forth.
Fourth. The manufacturing of machinery driving belts by attaching longitudinal
strips of solutionized canvas or equivalent material along the gripping side edges
of the belts and then attaching transverse pieces of fabric or material between said
edge strips, substantially as and in the manner set forth.
Dated the 16th Sentember 1891.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.