Improvements in Belt-fasteners.
Year: 1893

page_text: Date of Application, 11th Nov., 1893-Accepted, 16th Dec., 1893
COMPLETE SPECIFICATION.
Improvements in Belt-fasteners.
I, JAMES WALKER of 748 Coventry Road, Birmingham, in the County of
Warwick, Commercial Traveller, 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 in writing that is to say :-
This invention has reference to improvements in the "butt" form of joints used
in machinery driving belts, and whereby an increased grip and greater flexibility
will be obtained as compared with the fasteners heretofore in use.
The improvements essentially consist in constructing the butt joint fasteners in
the form of metal plates having three corrugations, a central one, and two side
corrugations, the plates being secured over the two joint ends of the belt by bolts
passed through the side corrugations and having screw nuts outside.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings in which the same reference letters are
used to indicate corresponding parts in all the figures where shown. Figure 1 is
a side elevation partly in section, Figure 2 a plan view, and Figure 3 an edge view,
at right angles to that shown in Figure 1 of the butt joint of a driving belt as
fitted in the transverse direction with two of my improved belt fasteners in
accordance with one arrangement of my improvements. And Figures 4 and 5 arc
views corresponding to Figures 2 and 3, showing the belt fastener as formed all in
one transverse piece across the width of the belt in accordance with a slightly
modified arrangement of my improvements, Figure 5 also showing the contour of
the driving pulley P.
Referring to these drawings:-The butt joint is formed by taking the two
ends α, a' of the belt and drawing them nearly close together, and then in placing
a narrow transverse strip a² preferably of the same material but thinner than that
of the belt a, a, to cover the top surface and overlap the centre junction butt joint
part a¹¹.
My improved corrugated plates B are fitted over the top layer a², two of these
plates B being used in the arrangement shown in Figures 1 to 3 and one long
transverse plate B in the arrangement shown in Figures 4 and 5. These corrugated
plates B are formed with two side corrugations or ridges 6' 6' and one large or
extended intermediate corrugation or bridge b directly over the centre al of the
butt joint and the undulating parts 63 bear on the top of the strip a² on each side
of the ridges. These plates B are attached to the belt by passing screwed bolts ċ
with heads c through holes in the ends a a¹ of the belt, and through the inter-
inediate strip a and side corrugations at suitable distances apart, and these
bolts are secured by screwed nuts c¹ on the upper side, and by countersunk headed
washers on the underside of belt a, a', prougs c³ on the bolt heads c¹ entering
end slits in the heads of washers, and these washers have preferably projecting
prongs on their inner side to more effectually grip the undersurface of the
belt and prevent both the bolt c and washer c³ from turning in screwing on the
nuts".
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 :-
First. The constructing of the butt joints of driving belts with corrugated metal
fasteners secured by bolts and nuts over the ends of belt, substantially as herein

page_text: Second. The construction and use of metal plate belt fasteners with two side
corrugations or ridges secured to the belt and an intermediate free corrugation or
bridge to overlap the two joint ends of belt and form a butt-joint, substantially as
herein described in reference to and shown in the accompanying drawings.
Dated the 0th November 1802
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.