Improvements in Driving Belts for Machinery.
Year: 1894

page_text: Date of Application, 14th Dec., 1894
Complete Specification Left, 14th Sept., 1895-Accepted, 9th Nov., 1895
IRUVIDIONAL DEMOTIVATION
Improvements in Driving Belts for Machinery.
I, THOMAS CRAWFORD DENNISON, of Oamaru, in the Colony of New
Zealand, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
My present invention relates to belts or bands used for driving machinery, and,
more especially to belts to be used as a substitute for the pitch chains now
ordinarily used in combination with suitable corresponding chain wheels, for driving
bicycles and other velocipedes.
It has for its object a novel method of construction of such driving belts by
which they are made very light, but at the same time strong, flexible, and durable,
whilst they cannot stretch and are not liable to slip, and are very much more cleanly
than chains, no oil being required.
In order to put my invention in operation I use a thin endless strip of steel or
other suitable metal, of the necessary width and thickness, and of such length that'
it will fit, with the proper degree of tightness, round the wheels or pullies upon
which it is to be placed.
I coat this metal strip all over, with one or more coatings of vulcanized india-
rubber, in the usual way, by which such coating becomes firmly and permanently
attached to the metal strip.
Upon the pedal or other driving axle of the bicycle or other velocipede, and'
upon the axle of the wheel which is to be driven, such as the driving wheel of a
bicycle, I firmly fix pullies of the requisite proportional diameters, and round
these pullies, the peripheries of which are without teeth, I place the endless band'
prepared as described. The peripheries of these pullies may also, if desired, be
coated with indiarubber or the like.
Provision is preferably made for adjusting the distance between the two pullies,
and where this is properly done, the adhesion of the indiarubber covered band to
the pullies is sufficient to prevent any slipping during the propulsion of the'
machine, whilst the movement is extremely easy, silent, and smooth.
It is evident that instead of indiarubber a coating of other like material
sufficiently soft and elastic and capable of being firmly attached to the metal band'
may be used.
My invention may be applied not only to bicycles and other forms of
velocipedes, but to light machinery of any other kind, and by its use weight is
considerably reduced and from the absence of friction and jar, the power required
is also reduced.
1004

page_text: Improvements in Driving Belts for Machinery.
I, THOMAS CRAWFORD DENNISON, of Oamaru, in the Colony of New
Zealand, Civil Engineer, 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, that is to say:
now
My present invention relates to belts or bands used for driving machinery, and
moře especially to belts to be used as a substitute for the "pitch chains
ordinarily used in combination with suitable corresponding chain wheels, for driving
bicycles and other velocipedes.
It has for its object a, novel method of construction of such driving belts, by
which they are made very light but at the same time strong, flexible, and durable,
whilst they cannot stretch and are not liable to slip, and are very much more
cleanly than chains, no oil being required. In order to put my invention in
operation I use a thin endless strip of steel or other suitable metal, of the necessary
width and thickness, and of such length that it will fit, with the proper degree of
tightness, round the wheels or pullies upon which it is to be placed. I coat this
metal strip all over, with one or more coatings of vulcanized indiarubber, in the
usual way, by which such coating becomes firmly and permanently attached to the
metal strip.
Upon the pedal or other driving axle of the bicycle or other velocipede, and
upon the axle of the wheel which is to be 'driven, such as the driving wheel of a
bicycle, I firmly fix pullies of the requisite proportional diameter, and round these
pullies, the peripheries of which are without teeth, I place the endless band
prepared as described. The peripheries of these pullies may also, if desired, be
coated with indiarubber or the like..
I make these pullies or wheels round which the endless band is to pass, with an
angular recess or groove round their circumference within which the indiarubber
coating of the endless band fits sufficiently tightly, and in order to increase the
grip of the latter the groove may be coated with enamel.
Provision is preferably made for adjusting the distance between the two pullies,
and where this is properly done, the adhesion of the indiarubber covered band to
the pullies is sufficient to prevent any slipping during the propulsion of the machine,
whilst the movement is extremely easy, silent, and smooth.
It is evident that instead of indiarubber a coating of other like material,
sufficiently soft and elastic and capable of being firmly attached to the metal band,
may be used.
My invention may be applied not only to bicycles and other forms of
velocipedes, but to light machinery of any other kind, and by its use weight is
considerably reduced, and from the absence of friction and jar, the power required
is also reduced.
I do not confine myself to the precise details of construction and material,
which may be varied more or less as may be found desirable in different
circumstances.
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 1
claim is:
1. The driving belt or band consisting of an endless metallic band, coated with
indiarubber, substantially as described.
2. In the driving belt or band described, the use of other like soft and elastic
material instead of indiarubber.

page_text: 3. In combination with the driving belt or band described and claimed in
Claims 1, and 2, pullies having circumferential grooves coated with enamel
substantially as, and for the purpose, described.
Dated this 14th day of September 1895.
EDWARDS & Co.,
65 and 66 Chancery Lane, London, Agents for the Applicant.