Improvements in Rope and Cable Grips. securing a , or for mooring and other purposes.
Year: 1892

page_text: Date of Application, 3rd May, 1-92-Accepted, 4th June, 1892
COMPLETE SPECIFICATION.
Improvements in Rope and Cable Grips.
We, WILLIAM THOMPSON, of 58 Frederick Street, Sunderland, in the County
Durham, Merchant, and DAVID DISHART, of 10 Lilburn Street, Sunderland,
foresaid, Engineer, do hereby declare the nature of this invention and in what
anner the same is to be performed, to be particularly described and ascertained
and by the following statement :-
Our invention relates to the construction of an improved apparatus, or holdfast,
r securing a rope, or chain for mooring and other purposes.
In the accompanying two sheets of drawings.
We, WILLIAM THOчrson, of 58 Frederick Street, Sunderland, in the County
of Durham, Merchant, and DAVID DISHART, of 10 Lilburn Street, Sunderland,
aforesaid, Engineer, 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:—
Our invention relates to the construction of an improved apparatus, or holdfast,
for securing a rope, or chain for mooring and other purposes.
In the accompanying two sheets of drawings,
Fig. 1 is a side elevation,
Fig. 2 is a plan, and
Fig. 3 a cross-section through A A in Fig. 2, of an apparatus constructed in
accordance with our invention.
Fig. 4 is a plan,
Fig. 5 is a longitudinal section through a a in Fig. 4, and
Fig. 6 is a cross-section through 6b in Fig. 5, shewing a modified form of the
apparatus.
Similar letters of reference denote similar parts throughout the drawings
--
The apparatus, as shewn in Figs. 1 to. 3, consists of a casting or forging B,
forming a base and provided with two fixed jaws C, C.,
An indentation C is formed in each of these jaws, in which the rope D, to be
secured, is laid. A movable jaw E, formed with a similar indentation E¹, fitting
over the rope is pivoted between the jaws C, C at F.
It is forced down by means of a uut H, on a bolt J, pivoted to the casting B
at J', and entering a slot E in the end of the jaw.
By tightening the nut H, the rope D can be held with great force, while it can
be instantly released by merely slackening the nut, and when the nut is slackened,
the bolt J can be swung forward out of the slot E³, and the jaw E thrown back,
as shewn by dotted lines in Fig. 1, without removing the nut from the bolt.
Any suitable form of lever can be employed to operate the nut, and such lever
may be loose, or may be fixed to, or made in one piece with the nut.
A convenient arrangement consists of a nut with two handles H', H', forged in
one piece therewith, as shewn.
Ratchet teeth K are formed upon the lower part of the peripheral surface of the
nut, or a separate ratchet wheel may be affixed to the nut; a pawl lever L
fulcrummed at L' between the lugs C³ C³, engages with the said teeth and locks
the nut when screwed down, and prevents its release until the pawl is disengaged
by pressing the foot upon the flattened extension L' of its lower end.
This pawl may be arranged to engage with the teeth K by the action of gravity,
or a suitable spring may be provided for this purpose.
A curved spring M is fixed by its longer end within a groove in the casting B,
by a key N. It presses against the bolt J and serves to hold it normally in the
position shewn by the full lines in Fig. 1, but will yield sufficiently to allow the
bolt to be moved forward to permit the jaw E to be thrown back, as shewn by
the dotted lines.
Holes, as shewn at P, are provided in the base B to receive bolts for attaching
the apparatus.
In the modified arrangement shewn in Figs. 4, 5 and 6, the jaws C are
independent of the base B. A large circular opening with coned sides Q, is
formed in the base, and a circular projection R. of similar form, is provided on the
underside of the said jaws, to fit within it. These jaws may be of similar pattern
Prine d

page_text: to those shewn in the previous figures, and they have hinged to them a similar
movable jaw E forced down on the rope by a bolt and nut in the same manner as
before described. This bolt and nut are not shewn in Figs. 4, 5 and 6. The
effect of this arrangement is that the jaws are able to turn in any direction, and
automatically adjust themselves to the direct line of pull on the rope, and thus
avoid any injurious cross strains on either the rope or the apparatus.
A gap S is provided in the base to enable the jaws C C to be inserted in position
from the underside, and when they are in place, the said gap is fitted with a piece T
of the correct shape to fill up the opening.
Our apparatus can be fixed on board a vessel, on a dock or wharf, or in any other
required place or position.
The multiplication of power obtained by the handles H'H', the screw J, and
the leverage of the jaw E, enable great force with small expenditure of strength
to be exerted upon the rope, which, as will be seen from the cross-section Fig. 3, is
indented by the jaw E between the jaws C C, and can thus be held, when so
required, without the possibility of slipping.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is :-
1. In an apparatus for securing ropes for mooring and other purposes, the com-
bination of a base B with fixed jaws C C having indentations C¹ C₁, a movable
jaw E having an indention E' and slot. E³, a pivoted bolt J and nut H, substantially
as set forth.
2. In an apparatus for securing ropes for mooring and other purposes, the com-
bination of a base B with fixed jaws C C, having indentations C₁ C', a movable
jaw E having an indentation E' and slot E³, a pivoted bolt J and nut H having
ratchet teeth K and a pawl L, substantially as set forth.
3. In an apparatus for securing ropes for mooring and other purposes, the com-
bination of a base B with fixed jaws CC having indentations C₁ C', a movable
jaw E having an indentation E' and slot E, a pivoted bolt J and nut H having
ratchet teeth K and a pawl I, and a spring M applied to the bolt J, substantially
as set forth.
4. In an apparatus for securing ropes for mooring and other purposes, a base B
with circular opening therein, and jaws C C and E to hold the rope provided with
a circular projection fitting said opening, so that the jaws can turn upon the base in
any direction, substantially as set forth.
5. In an apparatus for securing ropes for mooring and other purposes, a base B
with circular opening, and jaws C C and E to hold the rope provided with a
circular projection fitting said opening, so that the jaws can turn upon the base in
any direction, the jaws being furnished with a pivoted bolt, supported by a spring
and having a nut with ratchet teeth and a pawl, substantially as set forth.
Dated this 3rd day of May 1892.
AMBROSE MYALL,
21, Cockspur Street, London, S.W., Agent for the Applicants.