Year: 1886

page_text: I ISAAC JACKSON of High Street Glossop in the County of Derby, Saddler do
hereby declare the nature of this invention to be as follows:-
This Invention relates to the construction and manufacture of hinged and
similar fasteners for driving bands or belts and these Improvements have for their
objects to prevent the fracture or breakage of the fastener when passing around a
small pulley, to give a more secure grip upon the belt, to preserve the points of
the teeth, to enable the ends of the belt to be secured to the fastener in such a
manner that they do not crush or overlap each other and to strengthen the knuckles
of the hinge.
These improvements consist in constructing the plates of the fastener of com-
paratively short linear dimensions in making the teeth with a triangular cross
section and so arranging or disposing them that the base or one side of the triangle
is parallel with the end of the belt, in casting distance pieces or gauges upon the
under or belt side of the knuckles against which the ends of the belt may abut
and in casting strengthening pieces upon the upper or outer sides of the plates in
such a manner that the knuckles and plates are thereby mutually strengthened.
In order to obtain an accurate fit between opposite knuckles of the hinge I cast
them a little larger than the finished size and shape them to the required dimen-
sions by means of rotary cutters or by other equivalent means. An accurate fit
for the pin or pivot is obtained by casting the holes through the knuckles of a
smaller size and cleaning or finishing them by a drill which renders the holes
smooth and reduces the friction.
4.

page_text: Improvements in Fasteners for Driving Bands and Belts.
I, ISAAC JACKSON of High Street, Glossop, in the County of Derby, Saddler 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:
This Invention relates to the construction and manufacture of hinged and
similar fasteners for driving bands or belts and these improvements have for their
objects to prevent the fracture or breakage of the fastener when passing around a
small pulley; to give a more secure grip upon the belt; to preserve the points of
the teeth; to enable the ends of the belt to be secured to the fastener in such a
manner that they do not crush or overlap each other; and to strengthen the
knuckles of the hinge.
These improvements consist in constructing the plates of the fastener of com-
paratively short linear dimensions; in making the teeth with a triangular cross
section and so arranging or disposing them that the base or one side of the triangle
is parallel with the end of the belt; in casting distance pieces or gauges upon the
under or belt side of the knuckles against which the ends of the belt may abut,
and in casting strengthening pieces upon the upper or outer sides of the plates in
such a manner that the knuckles and plates are thereby mutually strengthened.
In order to obtain an accurate fit between opposite knuckles of the hinge, I cast
them a little larger than the finished size, and shape them to the required dimen-
sions by means of rotary cutters or by other equivalent means. An accurate fit
for the pin or pivot is obtained by casting the holes through the knuckles of a
smaller size and cleaning or finishing them by a drill which renders the hole
smooth and reduces the friction.
These improvements are illustrated in the accompanying drawings in which
Bimilar letters are employed to denote similar parts, where they occur in the
various Figures, reference being hereinafter had thereto.
Fig. 1 represents a plan of the under or belt side-the fastener; Fig. 2 a longi-
tudinal section with the ends of a belt attached; Fig. 3 a longitudinal section of a
fastener with an additional plate or mid-piece; Fig. 4 a plan of the modification
illustrated in Fig. 3 the part to the left being represented as, seen from above and
the part to the right as viewed on the under side, and Fig. 5 is a plan as seen from
the upper or outer side.
A A are the plates of the fastener; B B the knuckles of the hinge; C C the
connecting pin; D D cone headed bolts for connecting the belt to the fastener;
EE coned or dished washers used with the bolts E E; F F alternative bolts
having fangs or projections on the under side of the head to penetrate and engage
the belts; G G the gauge or distance pieces against which the ends of the belt
abut; H H the triangular teeth or projections which enter and engage with the
belt; and II are the strengthening ribs.
To obtain greater security for the connection between the fastener and the belt
the plates of the fastener are dished from the under side around the bolt holes so
that the head of the bolt on being tightened up draws a portion of the belt within
"

page_text: the recessed part and the head of the bolt is kept out of contact with the pulley.
To enable the pull to be transmitted through the fastener more uniformly I dis-
tribute the knuckles of the hinge equally on each side of the centre as represented
in the drawings; that is to say an even number of knuckles is formed or cast on
one plate of the fastener and an odd number on the other plate.
I desire it to be understood that I do not make any general claim for hinged
fasteners nor for the formation of teeth thereon since these are already in use
nor do I make any claim for the connecting pins or bolts; these being ordinary
articles of commerce.
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 what
I claim is:-
(1.) In hinged fasteners for driving bands or belts, the gauge or distance
pieces GG, substantially as herein before described and as illustrated on the
accompanying sheet of drawings.
(2.) In hinged fasteners for driving bands or belts, teeth or projections H H
each tooth having a triangular cross section one side of which is at a right angle to
the length of the band or belt, substantially as hereinbefore set forth and as illus-
trated on the accompanying sheet of drawings.
(3.) In hinged fasteners for driving bands or belts, the thickened parts ribs
or strengthening pieces I I, substantially as and for the purpose herein before
described and as illustrated on the accompanying drawings.
(4.) The manufacture or construction of hinged fasteners for driving bands or
belts; having plates of short linear dimensions, provided with teeth or projections
to engage the band or belt, with gauge pieces, and with strengthening ribs;
substantially as hereinbefore set forth and described and as illustrated on the
accompanying drawings.
(5.) In the manufacture or construction of hinged fasteners for driving bands.
or belts, casting the holes through the knuckles of the hinge smaller than the
finished size and clearing or finishing them to the required diameter by drilling.
(6.) In the manufacture or construction of hinged fasteners for driving bands or
belts, casting or forming the knuckles of a greater length than the finished size and
cutting or reducing them to the desired length by rotary cutters or by equivalent
cutting devices.