Improvements in Rope-grips or Lashing Devices.
Year: 1888

page_text: Date of Application, 7th Dec., 1888
Complete Specification Left, 9th Mar., 1889-Accepted, 22nd June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Rope-grips or Lashing Devices.
A communication from ARTHUR KELLY EVANS, of the City of Toronto, in the
County of York, in the Province of Ontario, Canada, Civil Engineer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. do hereby declare the nature of this invention to be as follows:-
The object of the present invention is to provide an improved device whereby an
extremely firm grip can be secured on a rope, wire or spar so as to avoid the
possibility of any slipping of the gripping strand over the material clutched when a
strain is put on; and it consists, essentially, in so locating holes pierced in a metal
plate having hook-shaped horns, and through which the gripping strand passing from
a straining piece is threaded with reference to the bed on the hook-shaped horns
over which the gripping strand is designed to pass, that the gripping strand forms
nearly perfect loops, thus almost encircling the material to be gripped, and at the
same time when the article to be gripped is a rope follows the strands of rope
and imbeds itself when a strain is put on, between such strands; it also consists in
forming on said metal plate and between said holes, where very small rope, covered
wire or other unstranded smooth material is to be gripped, projections or detents
which, when a strain is put on the gripping strand, imbed themselves slightly in such
rope, covered wire or other unstranded smooth material, and also where wire rope or
other stranded hard material is to be gripped, detents so formed as to follow and
imbed themselves for some distance around between the strands of such wire rope or
other stranded hard material when a strain is put on gripping strand.
Dated this 7th day of December 1888.
COMPLETE SPECIFICATION.
Improvements in Rope-grips or Lashing Devices.
A communication from ARTHUR KELLY EVANS, of the City of Toronto, in the
County of York, in the Province of Ontario, Canada, Civil Engineer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 object of the present invention is to provide an improved device whereby an
extremely firm grip can be secured on a rope, wire or spar so as to avoid the
possibility of any slipping of the straining strand over the material clutched when a
strain is put on; and it consists essentially in so locating the holes pierced in the
metal plate having the hook-shaped horns and through which the gripping strand
passing from the straining piece is threaded with reference to the bed on the hook-
shaped horns over which the straining strand is designed to pass, that the gripping
strand forms nearly perfect loops, thus almost encircling the material to be gripped
and at the same time follows the strands of rope and imbeds itself when a strain is
put on, between such strands; it also consists in forming on said metal plate and
between said holes, where very small rope, covered wire or other unstranded smooth
material is to be gripped, projections or detents which when a strain is put on the
gripping strand, imbed themselves slightly in such rope, covered wire or other
unstranded smooth material and also where wire rope or other stranded hard material

page_text: is to be gripped, detents so formed as to follow and imbed themselves for some
distance around between the strands of such wire rope or other stranded hard
material when a strain is put on gripping strand, substantially as hereinafter
described.
Fig. 1 is a perspective view of this improved device before a strain is put on.
Fig. 2 is a view of this improved device after a strain is put on, showing detents
for unstranded material.
Fig. 3 is a detail of metal plate with hook-shaped horns and detents for stranded
hard material.
Fig. 4 is a view of this device gripping a hawser.
Fig 5 is an alternative form with chain straining strand.
In the drawings like letters of reference indicate similar parts in the different
figures.
In figure 1, A is the straining strand which has been passed round the rope B;
this straining strand having been threaded through the holes c in the straining
piece C as well as through the holes d in the metal plate D and is attached at each
end to the straining piece C. e are the hook shaped horns formed on the metal
plate which form beds for the straining strand after it has been passed round the rope
to be gripped. In this figure 1 the straining strand is shown loosely encircling the
rope B which being of small size, the straining strand may be passed over bed 1 of
the upper hook-shaped horn and so on over the successive horns.
In large-sized ropes the straining strand passing from the upper holo on the metal
plate D may pass over projection 2 and so on over the successive horns thus giving
the loops of the straining strand a more diagonal direction. It will be noticed that
the holes d pierced in the metal plate D and through which the straining strand is
threaded are located close up to the beds on the hook-shaped horns and at regular
distances above and below said beds so as to admit of nearly perfect loops being
formed round the material to be gripped and minimizing the amount of metal in the
metal plate D...
In figure 2 the hook-shaped projections e are formed on the side of the metal
plate D opposite to that shown in figure 1; and the straining piece Cand metal plate D
are shown partly broken away the method of encircling the rope with loops passing
round it in a diagonal direction is better adapted for large-sized ropes. In this view
a strain has been put on the straining strand A. F. are the detents with rounded
tops formed on the metal plate D which bite into the rope which has been gripped and
still further prevent any tendency to slip.
In figure 3 a detail of the metal plate D is shown with detents F formed thereon
having a grooved surface adapted to form a bed for the strands of a wire rope when
it is gripped.
Fig. 4. shows an alternative form of this improved device gripping a large sized
rope or hawser B. In this view the hook-shaped horns e. of the metal plate D are
bent so as to project outwardly from the material gripped. The straining piece C
through which the straining strand A is threaded is not shown the rope being broken
away. The loops of the straining strand A are shown taut and imbedded on one
side of the hawser between its strands.
Fig. 5 shows another form in which the straining strand A' is formed of pieces of
chain attached at one end to the metal plate D by eyelets g then encircling the
spar B₁ or material gripped, and passed over one of the hook-shaped horns e to
the straining piece C. as shown. For gripping large-sized rope or wire rope the
straining strand A may be composed of flexible steel cable wire or other suitable
material which may be covered with leather, canvas or other material to prevent
injury to rope.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to, me by
foreign correspondent, I declare that what I claim is :-
1. In a rope grip a strip of rigid material with holes pierced therein and having

page_text: hook-shaped horns formed on one side thereof a straining strand connected at each
end to a straining piece and threaded through holes formed therein as well as through
holes located in said strip close to the bed formed by said hook-shaped horns and at
regular distances above and below said beds and designed to be passed round the
rope or material to be gripped and over the hook-shaped horns so as to form loops
which imbed themselves between the strands of the rope when a strain is put on
substantially as specified.
2. In a rope-grip a strip of rigid material with hook-shaped horns formed on one
side thereof holes pierced therein above and below the bed formed by the hook-
shaped horns and close up to said bed and detents formed on said strip between said
holes a series of loops formed by a straining strand designed to be passed round the
material gripped and over the hook-shaped horns and threaded through said holes
and through holes formed on a straining piece to which it is rigidly attached at each
end substantially as described and for the purpose specified.
3. The combination with the rope B of strip D having hook-shaped horns e and
holes located close to the bed formed by the hook-shaped horns the straining
piece C. with holes the straining strand A threaded through said holes c and d
and secured to said straining piece C. substantially as described and for the purpose
specified.
4. The combination with the rope B of strip D having hook-shaped horns e and
holes d located close to the bed formed by the hook-shaped horns and detents F
and the straining strand A threaded through said holes c and d and secured to said
straining piece substantially as described and for the purpose specified.
5. The combination with the spar B₁ of the metal strip D having hook-shaped
horns the chain A' secured to the said strip D and straining piece C substantially
as specified.
Dated this 9th day of March 1880