Improvements in Belting or Power Transmitters.
Year: 1893

page_text: te of Application, 7th Mar., 1893-Accepted, 8th Apr., 1893
COMPLETE SPECIFICATION.
Improvements in Belting or Power Transmitters.
I, ELDORAS TODD, Lumberman, residing at Clavering, in the County of Grey,
and Province of Ontario, Canada, 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 :-
It is well known by those interested in leather belting that the middle portion
of the hide has the least comparative stretch and textile strength, and that the
edges of the hide have the greatest comparative stretch and textile strength, con-
sequently a belt constructed from the middle portion and the two sides of the
hide would be of unequal stretch and strength; it has also been found that one of
these belts after being put to work proceeds very rapidly to stretch and that in
the course of a few hours or a day or more becomes so slack that a large amount
of the power is lost in transmission between the driving and the driven pulleys;
it is also known that some portions of the hide will more readily crack or split than
others and that if one of these portions is used in the manufacture of the belt it
is more than possible that the destruction of the belt will rapidly follow, to say
nothing of the loss of its elasticity on account of the employment of this rapidly
destructible part. It has also been found that a leather belt when wet will stretch
to such an extent that it will slip upon the pulley and fail to transmit any power
whatever from the driving to the driven pulley. Again in regard to leather,
rubber, and fabric belting it might be stated that these beltings are apt to run off
the pulley and become wound upon the shaft or tangled in the spokes of the pulley
and destroy themselves, whilst in the event of breakage they have been known to
whirl through the surrounding space and seriously injure any object with which
they come in contact. These classes of belting are also destroyed by the friction
caused by the continuous travel of the belting over the pulleys, and also by the
action of fire; and the object of this invention is to devise a belt or power trans-
mitter all portions of which will have an equal textile strength and the stretching
properties of which will amount to nil when in comparison with the stretching of
the leather, rubber or fabric belting and one which also can be so evenly con-
structed that no danger of running off the pulley, by reason of an uneven surface
will ever occur, and consequently the accompanying danger of being wound on
the shaft or tangled in the pulley will be entirely avoided, and which also in the
event of breakage or from any unforeseen or unavoidable cause will drop from the
pulleys and remain motionless and thus prevent destruction or injury to life or
property by being whirled through the atmosphere, and which will also resist the
friction caused by its continuous travel over the pulleys and also the action of
fire; and the invention consists essentially of constructing the belt of flexible
metal, preferably steel,-nickel-steel,-or the like and fastening the meeting edges
together in such a manner that the strength of the pulley at that point will not be
impaired and the equilibrium of the belt will not be upset; the whole device being
constructed and arranged as hereinafter more fully set forth.
In the drawings:
Figure 1 is a perspective view of a piece of shafting showing two pulleys and
my belt passing over them.
Figure 2 is an enlarged perspective view of the joint.
Figure 3 is a perspective view of a portion of a three ply belt.
Figure 4 is a cross sectional view on the lines a-a Figure 3.
Like numerals of reference refer to like parts throughout the Specification and
drawings.
The belt 1 is constructed of a piece of flexible metal preferably steel or nickel

page_text: steel of the required length, width and thickness. The meeting edges 1° are evenly
tapered on their inner or adjacent sides b and overlap each other to the full extent
of the taper. These edges 1ª are then fastened together preferably by being
brazed or riveted and the thickness and weight of this part of the belt corresponds
to the thickness and weight of any other equal portion of the same belt and
consequently the equilibrium of the belt is in no ways effected by the union of the
ends. In place of tapering the adjacent surface of the meeting edges 1* I may if
I so desire it taper the inner or outer face of the belt, as most suitable, at or near
each edge and braze to the tapered ends of the belt a thin strip 2 of the same
metal correspondingly tapered, which construction is shown in Figure 2 of the
drawings.
In Figures 3 and 4 I have shown a belt constructed for heavy work, which
consists of three sheets of flexible metal 1, 1º, and 14, arranged one above the
other. In the lower strip 1° and intermediate strip 1 are formed a series of
longitudinal slots respectively 3 and 32 suitably spaced. The slots in the sheet 1°
are arranged vertically over the slots in the sheet 1 and through these slots passes
the stem 4 of a rivet, the enlarged head 5 of which entirely enters a counter sunk
hole 6 formed in the lowermost or inner ply 1b rendering it flush with the lower or
pulley surface of the said ply whilst the opposite end of the stem 4 is firmly
secured to the outermost ply 1°.
A belt of this description is particularly applicable for pulleys having over a
thirty inch width of face and requiring a high driving power and the object of the
arrangement of slots and rivets is to permit of any play on the part of the plys 1³, 1º,
and 14. A belt or power transmitter constructed of steel will outwear any leather
rubber or fabric belts, and it will save at least one-third of the power heretofore lost in
transmission. In the event of its running off the pulley the belt will hang
stationary upon the shafts and will not become entangled in the pulley-spokes. It
might here be stated that the belt when constructed of steel and having a polished
surface travels without presenting any resistance to the atmosphere and consequently
saves the power heretofore lost through that cause.
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 :-
1. The improved power transmitter hereinbefore described and illustrated in
Figures 1 and 2 of the accompanying drawings.
2. The improved power transmitter hereinbefore described and illustrated in
Figures 3 and 4 of the accompanying drawings.
3. The improved power transmitter consisting of a metallic belt the ends of
which overlap each other and are securely fastened together.
4. The improved power transmitter consisting of a metallic belt the ends of
which are evenly tapered and overlap each other.
5. The improved power transmitter consisting of a metallic belt comprising a
multiple number of sheets arranged one above the other in the lowermost and
intermediate sheets are formed a series of slots through which pass the rivets each
of which has an enlarged head to enter a counter sunk hole in the lowermost sheet
and the other end of which is secured to the outermost sheet, the ends of each of
the sheets being fastened together to form a continuous belt.
Dated this 7th day of March 1902
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.