Improvements in Rope Couplings.
Year: 1892

page_text: Date of Application, 13th Aug., 1892-Accepted, 24th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in Rope Couplings.
I, BERNHARD KIRSCH, of Währingerstrasse 42, Vienna. IX, Austria, Professor,
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 has reference to an improved construction of rope coupling having
a much greater load-carrying capacity than rope couplings as heretofore constructed
and by means of which a rope can be more quickly and easily tightened up than
heretofore, the diameter moreover of the coupling being such that it cannot come
in contact with the rope pulley or pulleys over which the rope passes.
A rope coupling according to this invention comprises two bolts secured to each
other in a rotary manner and each provided with a number of hooks with which the
looped ends of the strands of a rope can be readily engaged, the arrangement being
that by rotating the two hook-bolts relatively to each other, the rope can, by
reason of its becoming shortened when twisted, be readily tightened to the required
extent, after which the bolts can be fixed in their relative positions to prevent the
rope untwisting.
In the accompanying drawings,
Fig. 1 is an elevation of a rope coupling constructed according to this invention.
Fig. 2 a sectional elevation of a part of such coupling.
Fig. 3 is a cross section on the line of Fig. 2.
Fig. 4 illustrates a pin wrench for tightening up the rope coupling.
Fig. 5 shows approximately the external appearance of a rope connected by
such a coupling.
The rope coupling comprises two bolts a a' each formed or provided at one end
with a number of hooks, for the purpose hereinbefore mentioned.
The other and adjacent ends of the said bolts are secured in a case b, in such a
manner that they can when desired be rotated relatively to each other, but cannot
be separated from each other. A suitable construction for this purpose is as
follows:
One of the bolts (a) provided with a collar c that bears against one end of the
case b, is formed with a screw threaded portion a' upon which is fitted a nut d
capable of freely entering the case band which is recessed at one end to receive
an inwardly projecting flange 6 of the case as shown. A pin or set screw f
inserted in a suitable recess made partly in the nut and partly in the bolt a serves
to prevent the bolt from screwing out of the nut.
The other bolt (a') is by means of its enlarged and externally screw threaded
end a³, screwed into the case b to which it is fixed by means of a set screw f
By this construction the hook-bolt a¹ together with the case b can be rotated
relatively to the hook-bolt a, without causing movement of the two bolts relatively
to each other in an axial direction.
In order to fix the hook-bolt a within the case after the two have been rotated
relatively to each other, a set screw is screwed through the latter so that its
plain end will enter a recess in the nut d as shown.
To tighten a rope with such a coupling, the looped ends of the strands com-
posing the rope, are connected to the hooks of the bolts a a¹, after which the bolts
are rotated relatively to each other with the aid of two keys or wrenches such as g
formed with projections g' that are caused to enter suitably arranged notches or
holes h h', in the case b and collar c respectively, after which the bolt a is fixed to
the case 6 by means of the set screw f.
Since the external diameter of the case bis smaller than that of the rope, the

page_text: rope coupling cannot bear upon the rope pulleys over which it passes, whereby all
wear of these parts that would otherwise take place is obviated.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. A rope coupling comprising two hook-bolts a a jointed or connected together
in such a manner that they can be rotated relatively to each other and then fixed
together and to the hooks of which the loop-shaped ends of the strands of a rope
can be secured, substantially as herein described for the purpose specified.
2. A rope coupling of the kind referred to in the preceding claim, in which one of
the hook-bolts (a') is fixed to a case b, and the other a to a nut d that is capable
of being freely rotated within the said case, means, such as a set screw capable of
being passed through the case and into the nut d, being provided for fixing the
bolt a and case b together when desired substantially as herein described for the
purpose specified.
Dated this 13th dex of August 1809
W. LLOYD WISE,
Per W. Cross,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.