Belting and in Belts therefor.
Year: 1885

page_text: "
Belting and in Belts therefor.
I, JOHN GLADWYN JEBB, of 1 and 5 Austin Friars in the city of London,
Merchant do hereby declare the nature of my invention for "IMPROVEMENTS IN
WHEELS OR PULLEYS FOR USE WITH CORRUGATED BELTING AND IN BELTS THEREFOR,"
to be as follows:-
In the provisional specification of an invention for "A construction of driving
belts and wheels therefor" No. 6642, filed in the Patent Office by Patrick Adie of
Westminster and dated the first day of June 1885 is described a novel form of
mechanism for the transmission of power consisting of an endless metallic driving
belt transversely corrugated and adapted to be run on "ordinary toothed wheels
or on wheels on the peripheries of which "thin teeth may be formed by fixing
corrugated strips" of the said belting.
Now, my invention relates, firstly, to an improvement whereby I am enabled to
adapt the above-mentioned corrugated belting with greater ease and economy to
existing plant. Thus, instead of replacing the smooth pulleys, generally in use
with leather cotton, and other flexible belting, by "toothed wheels," or attaching
'thin strips” of the corrugated metallic belting to the peripheries of the said
pulleys, I employ a tire of india-rubber or equivalent elastic or yielding material
and cause it to be stretched over the pulley or rigger or properly cemented thereto.
This tire may be either plain or, preferably, corrugated to suit the belting and
slightly convex.
By this construction I gain decisive advantages:-(1) a diminution of wear and
consequently a great increase in the life of the belt; (2) silence in action; (3) less
tendency for the belt to run off the pulley; (4) easy and cheap adaptibility to
existing plant.
Secondly, I also for some purposes modify and improve the form of the belt.
Thus I make the belt V- or U-shaped, instead of flat, by a gradual increase in
the depth of the corrugations from the middle of the belt outwards, whereby
I adapt it to be run in V- or U-shaped grooves, or, when required, on the convex
periphery of a pulley. By this device the tendency of the belt to run off the
pulley is greatly diminished, while the increased flexibility of the edges renders
the belt less rigid laterally, without causing it to be too extensile; for the central

page_text: part of the belt may, from the shallowness of its corrugations, be thus made
practically unstretchable.
It will be noted that on this point I differ materially from Adie, who suggests
that "The corrugations instead of extending over the whole width of the strip may
be formed only along its middle, having on each side a plain border "-a construction
which tends to increase inconveniently the lateral rigidity of the belt, although it
serves its special object of making the belt relatively inextensile.
For high speeds I prefer to make the corrugated belt with perforations at
suitable intervals to facilitate the escape of the air carried in between the belt and
the pulley. When the belts are narrow and running on corrugated india-rubber
tires this perforation is of less consequence than when the belts are broad and the
tires plain.
In some cases I prefer to make my belt of corrugated steel, or phosphor bronze
in combination with canvas, india-rubber, or other suitable material-This may
either be placed between layers of the metallic belting, or where only one thickness
of metal is used, a strip of the canvas, or other equivalent material may be wrapped
round or superposed upon the metal belt and attached thereto-I thus secure the
strength and other advantages of the corrugated metallic belting with the safety of
a cotton or leather strap.

page_text: Freys 10 086 WICH COrugated
Belting and in Belts therefor.
I, JOHN GLADWYN JEBB, formerly of 1 and 5, Austin Friars, in the City of
London, and now of Palace Chambers, Westminster in the County of Middlesex,
Merchant, 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 :-
In the Specification of an Invention for "A construction of Driving Belts and
Wheels therefor," No. 6,642, for which Letters Patent have been granted to
Patrick Adie, of Westminster, and dated the 1st day of June, 1885, is described a
novel form of mechanism for the transmission of power, consisting of an endless
metallic belt, transversely corrugated, and adapted to be run on "ordinary toothed
wheels" or on wheels on the peripheries of which "thin teeth may be formed by
fixing corrugated strips" of the said belting.
Now, my invention relates, firstly, to an improvement whereby I am enabled to
adapt the above-mentioned corrugated belting with greater ease and economy to
existing plant. Thus, instead of replacing the smooth pulleys generally in use
with leather, cotton, and other flexible belting, by "toothed wheels," or attaching
thin strips" of the corrugated metallic belting to the peripheries of the said
pulleys, I employ a tyre of india-rubber, or equivalent elastic, or yielding material,
and cause it to be stretched over the pulley or rigger or properly cemented thereto.
This tyre may be either plain or if desired, corrugated to suit the belting and
slightly convex. By this construction I gain decisive advantages:-(1) A diminution
of wear, and consequently a great increase in the life of the belt; (2) Silence in
action; (3) Less tendency for the belt to run off the pulley; (4) Easy and cheap
adaptability to existing plant.
.
Secondly, I also for some purposes modify and improve the form of the belt.
Thus I make the belt V or U shaped instead of flat, by a gradual variation in the
depth of the corrugations from the middle of the belt outwards, whereby I adapt
it to be run in V or U shaped grooves, or when required on the convex periphery
of a pulley. By this device the tendency of the belt to run off the pulley is greatly
diminished, while the increased flexibility of the edges renders the belt less rigid
laterally, without causing it to be too extensile; for one part of the belt may from
the shallowness of its corrugations be thus made practically unstretchable. It will
be noted that on this point I differ materally from Adie, who suggests that,
"The corrugations instead of extending over the whole width of the strip, may be
formed only along its middle, having on each side a plain border a construction
which tends to increase inconveniently the lateral rigidity of the belt, although it
serves its special object of making the belt relatively inextensile.
For high speeds, I prefer to make the corrugated belt with perforations at
suitable intervals to facilitate the escape of the air carried in between the belt and
the pulley. When the belts are narrow and running on corrugated india-rubber
tyres, this perforation is of less consequence than when the belts are broad and the
tyres plain.

page_text: In some cases I prefer to make my belt of corrugated steel or phosphor bronze
in combination with canvas, india rubber, or other suitable material.
This may
either be placed between layers of the metallic belting or, where only one thickness
of metal is used, a strip of canvas or other equivalent material may be wrapped
round or superposed upon the metal belt and attached thereto by india-rubber or
equivalent cement, or by rivets. I thus secure the strength and other advantages
of the corrugated metallic belting with the safety of a cotton or leather strap.
To make my invention clear reference is made to the accompanying sheet of
drawings.
Fig. 1 is a side elevation of a pulley, 1, provided on its periphery with a plain
tyre, 2, of india-rubber or equivalent elastic or yielding material. This, if india-
rubber, may be stretched over the pulley and lightly cemented thereto, or,
preferably, a band of canvas may be wrapped round several times with layers of
cement interposed.
"
Fig. 2. is a similar view to Fig. 1, showing a flexible or yielding tyre, 2, with a
.corrugated periphery, which corresponds more or less with the corrugations of the
belting used therewith.
Figs. 3 and 4 are respectively a plan and a transverse section of a V-shaped belt
according to this invention. The corrugations of the belt are of gradually
increasing depth from the centre of the belt to the sides. Fig. 5 is a transverse
section of a U-shaped belt similar in many respects to Fig. 4. These V- and
U-shaped belts may vary considerably in acuteness so as to suit the pulley on
which they run, and adapt themselves to the purposes hereinabove mentioned.
Fig. 6 is a longitudinal section of one form of my improved compound driving
belt, it comprises two layers of corrugated metallic belting 3, 3, with a strip of
belt, 4, of canvas, india-rubber or other suitable material interposed between; the
whole being cemented or rivetted together.
Fig. 7 is a longitudinal section showing the belt, 3, with a superposed layer, 4,
of leather, canvas or india-rubber.
In lieu of placing the canvas or its equivalent between the metallic belting or on
one side thereof, it may be wrapped round the belt in strips, with suitable cement,
as will be readily understood.
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 do
not claim as my invention the construction of transversely corrugated belting
per se, or the apparatus consisting of such belting in combination with corrugated
wheels or pulleys adapted thereto; but what I claim is :-
(1.) In the construction of apparatus for the transmission of motive power by
means of corrugated belting, the use and employment of a pulley having a tyre of
india-rubber, or other flexible soft or yielding material, substantially as and for the
purposes.herein set forth.
(2.) The special V- or U-shaped. construction of corrugated metallic belting
substantially as described herein.
(3.) In apparatus for the transmission of motive power by means of corrugated
belting and pulleys therefor, the use and employment of a compound driving belt
constructed of corrugated metallic belting in combination with india-rubber or
other flexible soft or yielding material, substantially as described herein.
)