Improvements in and connected with Bolt Belt-fasteners.
Year: 1896

page_text: Date of Application, 27th Feb., 1896-Accepted, 4th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in and connected with Bolt 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 performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to bolt belt-fasteners, and more particularly to the nuts
washers and plates of such fasteners and to the means for connecting bolts upon
opposite sides of a butt joint.
A nut for a belt fastener bolt constructed according to these improvements may
be simple or multiple, that is to say either one only or two or more connected nuts
may be formed in the same blank. The blank consists of sheet metal, preferably
steel, formed to a suitable shape and dimensions, on the under side of which a
"pipe" or tubular extension or a plurality of such extensions is or are formed as
hereinafter described, the pipe being internally screwed for the reception of the
bolt or set screw. The nuts thus formed may be used in coinbination with.
suitable washers plates and links hereinafter described and project only very
slightly above the surface of the belt, so that risks of accident are reduced by
their use.
I will further describe my said invention with reference to the accompanying
drawings.
In Figure 1 representing a side elevation, A is the blank, preferably formed of
mild steel. This is laid upon a suitable die, and is perforated by the blind
punch B, which has a conoidal point and a parallel cylindrical shaft. The punch
and blank are shewn at the completion of the operation and before the withdrawal
of the punch, by Figure 2, the pipe C having been completely formed. Figure 3.
shews the blank as left by the punch, before tapping, and Figure 4 shews the same
blank after tapping, and with the addition of a washer hereinafter described, and
which may or may not be used in combination with it.
The blank may be of any desired form. Thus, Figure 5 shews a circular nut
produced from a similar blank, two small boles being punched through it to enable
it to be rotated by a forked screw driver. Figure 6 shews a nut formed from a
hexagonal blank which may be turned by a thin screw key. Figure 7 shews two
nuts produced in a single blank. In the case represented, the blank is flat, but it
may be, and preferably is, generally cupped or curved as shewn by Figure 9, the
concave side being that in which the pipes are produced.
I prefer to strengthen the pipe part of the nut by means of a washer D,
Figure 4. This washer is preferably rather smaller than the blank and has a
corresponding shape. Its opening is flanged as shewn, and it is fitted upon the
pipe part of the nut so that the Hange closely surrounds the pipe and thus
strengthens it.
In the case of the fasteners being used for making a butt joint, I may use one
or more bolts in each end of the belt, and connect the bolts on the opposite sides
by means of flat or curved links L, Figure 8, which may be stamped out of sheet
steel. With these links, bolts having nuts similar to those shewn by Figures 5
and 6 may be employed, with washers similar to that shewn in Figure 4, and the
head of the bolt is preferred to have a conical underside, so that the outside surface
of the bolt head may lie flush with the surface of the belt. Its turning may be
prevented by projections from the bolt head as is well understood.

page_text: Two links are represented in Figure 8. In the lower one the bolts and nuts are
in place, whilst in the upper the nuts are removed to shew the link.
In the modification of the connecting plate for a butt joint illustrated in plan
and longitudinal section by Figure 9, a nut similar to that shewn by Figure is
used for each bolt. This mut is removably arranged in a hole in the plate formed
as described with reference to Figures 1, 2, and 3, so that the hole has a tubular
extension on the inner side of the plate. This extension e surrounds the nut and
greatly increases the strength of the fastener.
It is desirable in some cases to employ a collar, such as that shewn by Figure 10
in vertical section, as for example in or as a liner for, the hole in the belt through
which the bolt passes, the collar being flared at j, for the reception of the bolt hend
or a suitably shaped nut. This collar may be formed by flaring one end of a short
length of steel tube, or it may be produced by taking the untapped blank,
Figure 3, and closing in its flange upon a conical mandrel or die..
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
claim is :-
1. Nuts for belt-fastener bolts, constructed substantially as hereinbefore described
and as illustrated by the accompanying drawings.
2. Plates, washers, and the like for use with bolt belt fasteners, and having
tubular extensions within which the nuts or bolt hends are arranged, constructed
substantially as and for the purpose hereinbefore described and as illustrated by
the accompanying drawings, Figures 4, 9, and 10.
3. Links for use in combination with bolts and nuts for making butt joints for
belts, constructed and arranged substantially as hereinbefore described and as
illustrated by Figure 6 of the accompanying drawings.
Dated this 26th day of February AD 1896
W. E. HEYS & SON.