Improvements in Belt Fasteners
Year: 1889

page_text: Date of Application, 11th Dec., 1889
Complete Specification Left, 11th Sept., 1890-Accepted, 11th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Belt Fasteners,
I, ISAAC JACKSON of Glossop in the County of Derby, Belt Fastener Manufacturer
do hereby declare the nature of this invention to be as follows:-
This invention relates to a belt fastener which is intended to be employed in,
substitution for laces and other similar means for connecting the ends of belts and
bands and which is particularly applicable for use with quick running bands such as
are employed in driving dynamo-electric and other high speed machines.
In its most elementary form the belt fastener constructed according to these
improvements consists of a screwed bolt and a disc-nut. The inner sides of the bolt
head and of the disc-nut are respectively concave and convex, that is to say if the inner
side of the disc-nut is concave the inner side of the bolt head is convex and the reverse.
The outer side of the bolt head or of the disc-nut, whichever is arranged to be next to
the pulley in work, is flat, and the outer side of the bolt head or disc-nut whichever
may be outside the band is rounded or smooth so as to prevent its possible engagement
or entanglement with any near object and to prevent accidental injury to the
operatives.
In addition to the bolt and disc-nut a cupped washer also may be employed and
this washer may or may not be provided with teeth or similar projections to engage
with the belt.
When the washer is used it is preferred to make the stem of the bolt oval or non-
circular and to make the hole in the washer of a corresponding shape so as to prevent
the turning of the washer on the bolt stem.
When the washer is not used, teeth or similar projections may be formed on the
inner side of the bolt head.
Dated this 10th day of December AD 1889.
WILLIAM E. HEYS,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Belt Fasteners.
I, ISAAC JACKSON of Glossop, in the County of Derby, Belt Fastener Manufacturer'
do hereby declare the nature of this invention, and in what manner the same is to
be perforined, to be particularly described and ascertained in and by the following
statement:-
This invention relates to a belt fastener which is intended to be employed in
substitution for laces and other similar means for flexibly connecting the ends of belts
and bands and which is particularly applicable for use with quick running bands such
as are for example employed in driving dynamo-electric and other high speed
machines.
In its most elementary form, the belt fastener constructed according to these
improvements consists of a screwed bolt and a disc-nut fitting thereon. The inner
sides of the bolt head and of the disc-nut are respectively concave and convex, that is
to say, if the inner side of the disc-nut is concave, the inner side of the bolt head is
convex, and the reverse. It is preferred to connect the ends of the band or belt by
means of the fastener in such a manner that the disc-nut is on the outer side of the con-
nected ends but if desired it may be on the inner side. The outer side of the bolt head
or of the disc-nut, whichever is arranged to be inside the belt or next to the pulley, is
flattened, and the outer side of the bolt head or of the disc-nut, whichever is arranged

page_text: to be on the outer side of the belt, is rounded or so formed as to prevent its possible
engagement in running, with any near article, and to prevent accidental injury to the
attendants or operatives.
In addition to the bolt and disc-nut, a cupped washer also may be employed, and
this washer may or may not be provided with teeth or similar projections to engage
with the belt.
When the washer is used it is preferred to make the stem of the bolt oval or non-
circular in cross section, and to produce a hole of a corresponding shape in the washer,
.or alternatively to form a nib or projection on either the bolt or the washer engaging
with a recess or notch in the washer or bolt, the object in either case being to prevent
the turning of the washer on the bolt stem.
Teeth or similar projections may be formed on the face of the washer, or when the
washer is not used, on the inner side of the bolt head.
I will more particularly describe my invention with reference to the accompanying
drawings in which different modifications of a fastener constructed according to these
iinprovements are illustrated. In each of the figures similar parts are indicated by
similar letters of reference.
A is the disc-nut; B is the bolt stem; C is the bolt head %3B D is the washer;
E E are points or projections on the washer; bolt head or nut, arranged to engage
with the substance of the belt; G is a nib which fits into a nick or recess formed
in the bolt head and thus prevents the rotation of the washer on the bolt stem;
H is an oval hole formed in the washer and fitting upon an oval part H' of the bolt
stem for a similar purpose; and I is a square formed upon the bolt head or upon
the disc-nut to facilitate its being screwed up and unscrowed by means of a spanner.
It is sometimes desirable to employ an oval disc-nut or its equivalent instead of
á round one, in order to obtain a greater surface of contact between the fastener
and the bolt, but unless some precaution is taken in construction, it will be found
impossible to turn the nut for tightening the fastener after the nut has come into
contact with the surface of the belt. To avoid this difficulty, when using a non-
circular nut, I construct it in two parts as shewn in Figures 1, 2, and 3, of which
Figure 1 is a vertical section through the fastener when in position; Figure 2 a plan
of the fastener alone viewed from above; and Figure 3'an inverted plan. The central
part A of the disc-nut is made separately with a prolongation or boss passing
through a hole pierced through the centre of the disc part of the nut and this
prolongation is preferably burred up under the disc to secure it thereon. This part
of the fastener resembles the corresponding part of the fastener described with
reference to Figures 8 and 9 in the Specification of the Letters Patent granted to me
No. 11,065 and dated the 13th day of August A.D. 1887, and it will be understood
'therefore that I do not now make any claim for a nut and a cupped washer under
the nut.
The face of the washer next to the belt has preferably formed upon it two or more
points to prevent its turning with respect to the belt. The washer is recessed on the
under side to receive the head of the bolt so that it may lie about flush therein, and is
constructed with a nib G within the recess fitting into a nick formed in the head of
the bolt, so that the bolt will be incapable of turning in the washer, and consequently
also in the belt to which the washer is secured by the points E E.
A commonly useful form of the washer is illustrated by the Figures 4, 5, 6, and 7,
of which Figure 4 is an elevation; Figure 5 a vertical section; Figure 6 a plan and
elevation respectively of the washer; and Figure 7, an inverted plan and vertical
section respectively of the washer. The construction of this form of the washer is,
except in regard to the disc-nut, and to the shape of the washer, similar to that
represented in Figure 1.
1
Figures 8 and 9 are respectively an elevation and a vertical section of a modified
form in which the washer is dispensed with. The points E E, if employed, are formed
on the inner face of the bolt head, and the nut is provided with a prolongation around
the inner side of the eye so as to give a greater length to the screwed part. The

page_text: prolongation of the nut will enter the substance of the belt through a suitable ho
formed therein as illustrated by Figure 1. This form of nut may be employed wit
modifications of the fastener illustrated by Figures 4 and 12.
A further modification is represented in elevation by Figure 10 and in vertical
section by Figure 11. This is simply an inversion of the form shewn by Figures 8
and 9, that is to say the nut is flattened on the outside face to lie under the belt, and
the bolt head is formed to lie outside the belt and to be removed by a spanner or by
similar means.
Figure 12 shews in elevation and Figure 13 in vertical section a slight modification
of the form represented in Figures 4 and 5. The stem of the bolt has an oval part
instead of the nick in its head, and the washer has an oval hole instead of a nib within
its recess for the purpose of securing the non-rotation of the bolt within the washer.
Figure 14 is a plan of the washer shewn in Figures 12 and 13; and Figure 15 is a
plan of the disc-nut.
A belt fastener having a washer with an oval or non-circular hole fitting upon the
oval or non-circular stem of a bolt is described in the Specification of the Letters
Patent No. 11,065 of A.D. 1887, and therefore, although the construction of the washer
and bolt stem is conveniently applicable to a fastener manufactured according to these
improvements, it will be understood that I do not now make any claim for it.
In narrow belts, one only of the washers may be used, but in wider belts as many
as may be required, arranged in one or more rows across the belt. When two or
more rows of the fasteners are employed, it is preferred that they should not be in
longitudinal lines so that the connection shall be as far as possible distributed.
In making turned up joints, a special flange may be formed upon the disc-nut, and
upon the washer or head of the bolt, somewhat as represented in Figure 3 of the
Specification of Letters Patent No. 11,065 of 1887 hereinbefore referred to.
One of the objects of this invention is to simplify the construction of the fastener
by reducing the number of its parts, and I therefore prefer not to employ washers
except in the case of the points E E being required, in which case it is easier to form
them upon the washer than upon the head of the bolt.
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). A belt fastener consisting of a screwed bolt having the inner surface of its head
convex and a disc-nut having its inner surface concave, substantially as hereinbefore
described, and as illustrated by the accompanying drawings.
(2). A belt fastener consisting of a screwed bolt having the inner surface of its head
concave and a disc-nut having its inner surface convex, substantially as hereinbefore
described and as illustrated by the accompanying drawings.
Dated this 10th day of September Å D 1890
WILLIAM E. HEYS,
Agent for the Applicant.