Improvements in Rope-couplings.
Year: 1893

page_text: Date of Application, 27th Sept., 1893
Complete Specification Left, 6th Mar., 1894-Accepted, 5th May, 1894
Improvements in Rope-couplings.
I, BERNHARD KIRSCH, of Feldgasse 31 Vienna, XVIII, Austria, Imperial and
Royal Professor, do hereby declare the nature of this invention to be as follows:-
The invention relates to a rope-coupling which, while comprising only a small
number of parts, is such as to allow the ends of the rope to which it is connected
to be rotated relatively to each other for the purpose of shortening the rope, but
will prevent the turning or untwisting movement of the rope except when required.
According to this invention the rope-coupling comprises two hook bolts to which
the two ends of the rope are respectively fastened; one of these bolts is connected
with a female part which is threaded internally and in which one end of the other
bolt, which is provided with lateral projections or fingers, (hereinafter called
projections) is inserted and in which it is fixed (but so as to be capable of rotation),
by means of a two-part nut placed thereon. A tooth, radially morable in an
opening in the female part of the coupling, serves as a stop for the said projections,
this tooth being pressed outwards, when the rope is being tightened, by the said
projections and allowing the latter to move past it, whilst, when the rope is
tightened, it can be pressed inwards by hand, and, coming before one of the
projections will by the lateral pressure of said projection be fixed in position and
prevent the backward rotation of the projections and of the bolt carrying them
and consequently also of the rope. A rope coupling according to my invention is
illustrated in the accompanying drawings.
Figs. 1 and 2 are two side-views at right angles to each other of the complete
coupling, Fig. 1 being partly in section.
Fig. 3 is a vertical section through the rope-coupling shewing the position of the
parts during the tightening of the rope.
Fig. 4 is a plan of the two-part nut that serves to connect the two hook-bolts.
Fig. 5 is a vertical section through the rope-coupling shewing the position of
the parts after the rope has been tightened.
Fig. 6 is a vertical section shewing how the tooth can be prevented from falling
out during transit of the rope-coupling when taken to pieces.
Fig. 7 is a side-view of the tooth; and
Fig. 8 is a section through the part of one of the hook-bolts, which is formed
with straight sides for the application of a key as hereinafter explained.
Figs. 9 and 10 represent to a smaller scale keys usable when tightening up the
rope and when taking the coupling to pieces.
L is a bolt formed with or attached to a female part c, and R is another bolt
formed or provided with lateral projections e. Each bolt is provided at its outer
end with a number of hooks a, a about which are placed the looped ends of the
strands of the rope. The diameter of the rope-coupling is preferably smaller.
than that of the rope, in order that the rope-coupling may not strike against the
rope wheel or pulley and injure it.
The coupling is put together by inserting the projections e of the bolt R into
the female part c of the bolt L, after which the two-part nut is inserted and is
screwed into the part c by suitable means (such as the lower end of the key
illustrated in Fig. 10), which grasps its upper angular portion i. By this means a
rotatable connection between the two bolts (and the two rope-ends fixed thereon) is
made, which cannot be loosened by pulling.
The female part c is provided with a lateral opening in which a tooth d acting
as a stop is radially movable and which is inserted into the opening from the

page_text: interior of the part c before the insertion of the fingers e and the nut b; it is
prevented from falling out by its broadened inner end. This tooth can be pushed
inward by hand. To tighten the rope the bolt L is held fast by suitable means
such as the key shewn in Fig. 9 inserted into the notches f (Fig. 2) and the other
bolt R is turned in the direction of the arrow shown in Fig. 3 say by the upper
end of key (Fig. 10) placed on the part g, the projections e sliding past the tooth
and pressing it outwards, and the tooth being pushed back by hand each time
behind the projection that has just passed it (Fig. 5).
When the rope is sufficiently tightened and the hook bolts are liberated, the
tightened rope tends to rotate the projections e in the opposite direction, the result
being that one of them is firmly pressed against the tooth d so that this tooth iś
fixed movably in position and the further backward rotation of the bolt R is
prevented.
It is therefore always in a simple way, viz.: by turning the bolts-relatively to
each other, possible to turn and shorten the rope, whilst loosening of the rope by
its backward rotation is impossible except when required.
In order that the tooth d may not be lost during the transit of the rope couplings.
when in pieces, a pin is pushed through the tooth d, as shown in Fig. 6.
Dated this 27th day of September 1893.
"
B. KIRSCH,
By L. W., per. F. B.
20
Improvements in Rope-couplings.
I, BERNHARD KIRSCH, of Feldgasse 31, Vienna, XVIII, Austria, Imperial
and Royal 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 :-
The invention relates to a rope-coupling which, while comprising only a small
number of parts, will allow of the ends of the rope to which it is connected being
rotated relatively to each other for the purpose of shortening the rope, and will
prevent the ends of the tightened rope untwisting or turning in the opposite
direction until it is desired that such movement should take place.
A rope-coupling of this kind, according to this invention, comprises two sections,
or bolts provided with hooks to which the two ends of the rope are respectively
fastened, one of these bolts being connected with the female part or socket bearing
of the coupling, which is screw threaded internally and in which one end of the
other bolt, which is provided with lateral projections or cams, (hereinafter called
cams) is inserted, and in which it is fixed, (but so as to be capable of rotation),.
by means of a two-part nut placed thereon. A tooth, radially movable in an
opening in the female part or socket bearing of the coupling, serves as a stop.
for the said cams, this tooth being pressed outwards, when the rope is being
tightened, by the said cams so as to allow the latter to move past it, whilst, when
the rope is tightened, it can be pressed inwards by hand, and, by coming in the
path of one of the cams, will, by the pressure of the said cam upon it, become
fixed in position and prevent the backward rotation of the cams and of the bolt
carrying them and consequently also of the rope. A rope-coupling according to
Provisional Specification,
my invention is illustrated in the drawings filed with my
and wherein,
Figs. 1 and 2 are two side-views at right-angles to each other of the complete
coupling, Fig. 1 being partly in section..
Fig. 3' is a vertical cross-section through the rope-coupling shewing the position
of the parts during the tightening of the rope.

page_text: Fig. 4 is a plan of the two-part nut that serves to connect the two hook-bolts.
Fig. 5. is a vertical cross-section through the rope-coupling shewing the position
of the parts after the rope has been tightened.
Fig. 6 is a vertical cross-section shewing how the tooth can be prevented from
falling out during transit of the rope-coupling and when the two parts of the
coupling are detached from each other.
Fig. 7 is a side-view of the tooth; and
Fig. 8 is a section through the part of one of the hook-bolts, which is formed
with straight sides for the application of a key as hereinafter explained..
Figs. 9 and 10 represent, to a smaller scale, keys suitable for use when
tightening up the rope and for taking the coupling to pieces.
L is a bolt formed with or attached 'to a female part or socket. bearing c, and R is
another bolt formed or provided with lateral projections or cams e. Each bolt is
provided at its outer end with a number of hooks a, a, about which are placed the
looped ends of the strands of the rope to be connected. The diameter of the rope-
coupling is preferably smaller than that of the rope, in order that the rope-coupling
may not when in use, strike against and injure the rope-wheels or pulley over
which the rope works.
C
The coupling is put together by inserting the cams e of the bolt R in the female
part of the bolt L, after which the two-part nut bis screwed into the part by
suitable means, (such as the lower end of the key illustrated in Fig. 10) which
engages the upper angular portion of the nut. By this means a rotatable
connection is made between the two bolts and the two rope-ends fixed thereon,
which connection cannot be loosened by pulling on the two bolts.
The female part c is provided with a lateral opening in which a tooth d, acting
as a stop, is radially movable. This tooth is inserted into the opening, from the
interior of the part c before the insertion of the cams and the nut b, and is
prevented from falling out of the opening by its broadened inner end. This tooth
can be pushed inward by hand. To tighten the rope, the bolt L is held fast by
suitable means such as the key shewn in Fig. 9, which is inserted into the notches f
(Fig. 2) of the female part c, and the other bolt R is turned in the direction of the
arrow shown in Fig. 3, say hy the upper end of the key (Fig. 10) which for this
purpose is placed on the squared part y, the cams e sliding past the tooth d and
pressing it outwards, and the tooth being pushed back by hand each time behind
the cam that has just passed it (Fig. 5).
When the rope is sufficiently tightened and the hook-bolts are liberated, the
tightened rope tends to rotate the cams e in the opposite direction, the result being
that one of them is firmly pressed against the tooth d which has been pushed
inward, so that this tooth is fixed firmly in position and the further backward
rotation of the bolt R prevented.
It is therefore always in a simple way, viz. by turning the bolts relatively to each
other, possible to turn and shorten the rope, whilst loosening of the rope by its
backward rotation is impossible except when this is required, which is effected by
releasing the tooth and drawing it out of the path of the cams e.
In order that the tooth d may not be lost during transit of the rope-coupling,
when the latter is in pieces, a pin ½ is pushed through its outer end, as shown in
Fig. 6.
Having now particularly described and ascertained-the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. A rope-coupling comprising two parts, adapted to be secured to the ends of a
rope and having their adjacent ends rotatably connected one within the other, the
female part of the one bolt being provided with a radially movable tooth and the
male part of the other bolt being provided with lateral projections or cams
arranged to rotate in the female part and to press back and slide past the tooth
when the two bolts are turned relatively to each other in a direction to shorten the

page_text: rope to which they are attached, relative rotation of the two bolts in the opposite
direction, and consequent untwisting or lengthening of the said rope," being pre-
vented until this is required, by the said tooth, which is pressed inward into the
path of each projection in turn during the shortening of the rope, substantially as
herein described.
j
2. The improved rope-coupling constructed substantially as described and
shown.