Improvement in Buoyant Wire-ropes.
Year: 1895

page_text: Date of Application, 21st Nov., 1895
Complete Specification Left, 8th Aug., 1896-Accepted, 12th Sept., 1896
Improvement in Buoyant Wire-ropes.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) to be as follows:-
This invention relates to means applicable to buoyant wire-ropes (such for
example as those described in the Specifications to Letters Patent granted to me
and dated 13th March, 1894, No. 5275, and 26th March, 1895, No. 6282) for the
purpose of preserving the buoyant material against injury by water, mud, slime, &c.,
and of protecting the same against the attacks of marine and other insects, the
penetration of such tending to diminish and ultimately to destroy the buoyancy.
Reverting by way of illustration to the modes of construction described in my
Specification No. 6282 of the current year, wires or wire strands covered with
hemp, jute or the like are surrounded by hose-pipes charged with cork or other
buoyant material and covered with hemp, jute or the like; or, wires or wire
strands are enclosed within hose-pipes charged with cork and covered with hemp,
the several wires or strands so covered being laid up around a core formed of a
hose-pipe charged with cork, either in the form of rings or in a granular
condition.
According to the present invention, the hose-pipe containing the cork, reindeer
hair or other buoyant material, is enclosed within a hose-pipe of hemp, jute,
ramie or the like, and this latter is surrounded by an envelope of gutta-percha,
caoutchouc, india-rubber or the like; the latter covering securing for the rope the
advantage of greater durability above referred to.
With a view to protecting the whole against injury, a further outer protective
covering of hemp, jute or the like, may be added. The hose-pipe, composed of
hemp, jute, ramie or the like, enclosing the buoyant material, may in some
instances be omitted; the gutta-percha or like envelope being utilised to enclose
the buoyant material.
To increase the buoyancy, buoyant strands of the above description may be
laid round a core, consisting of a hose-pipe charged with buoyant material, and
enclosed within an envelope of gutta-percha or like protective covering.
Dated this 21st day of November 1895.
G G M HARDINGHAM
COMPLETE SPECIFICATION.
Improvement in Buoyant wire-ropes.
J, GEORGE GAtton Melhuish HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) 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 means applicable to buoyant wire-ropes (such, for
Improvement in Duvyaut
J, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) 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 means applicable to buoyant wire-ropes (such, for

page_text: example, as those described in the Specifications to Letters Patent granted
to me and dated 13th March, 1894, No. 5275, and 26th March, 1895, No. 6282,)
for the purpose of preventing the ingress of water, mud, slime, etc. to the
buoyant material, thereby preserving it against injury by such fluid or substances,
and of protecting the same from the attacks of marine and other insects, the
penetration of such into the said material tending to diminish and ultimately to
destroy the buoyancy of the rope.
Reverting to the modes of construction described in my Specification to my
Letters Patent No. 6282 of 1895, wires or wire strands covered with hemp,
jute or the like are surrounded by hose-pipes charged with cork or other
buoyant material and covered with hemp, jute or the like; or wires or wire
strands are enclosed within hose-pipes charged with cork and covered with
hemp, the several wires or strands so covered being laid up around a core
formed of a hose-pipe charged with cork, either in the form of rings or in a
granular condition.
The accompanying drawings represent, in transverse section, buoyant wire-ropes
embodying the present improvement. In Fig. 1, the wires or wire strands a are
enclosed in hose-pipes charged with cork c in the form of half-rings and laid
up round a core consisting of a hose-pipe b' charged with cork c¹. In Fig. 2 the
wires or wire strands a are surrounded by hose-pipes 6 charged with granulated
cork c.
In Fig. 3 the arrangement is similar to Fig. 1, granulated cork being
substituted for the cork half-rings.
According to the present invention, the hose-pipe b of hemp, jute, ramie or
the like containing the cork, reindeer-bair or other buoyant material " is
enclosed within or surrounded by an envelope d of gutta-percha, caoutchouc,
india-rubber or the like; the latter covering securing for the rope the advantage
of greater durability above referred to.
With a view to protecting the whole against injury, a further outer protective
covering e of hemp, jute or the like, may be added. The hose-pipe b composed
of hemp, jute, ramie or the like, enclosing the buoyant material c, may, in some
instances, be omitted; the gutta-percha or like waterproof envelope & being utilised
to enclose the buoyant material.
To increase the buoyancy, buoyant strands of the above description may be
laid round a core, consisting of a hose-pipe (6) charged with buoyant material (c¹),
and enclosed within an envelope (d) of gutta-percha or like protective covering.
Instead of employing cork, reindeer-hair or similar filling, the requisite buoyancy
may be imparted by means of inflated balls.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
1. A buoyant wire-rope having bose-pipes containing cork or other buoyant
material enclosed within waterproof envelopes of gutta-percha, caoutchouc, india-
rubber or the like, substantially as herein described.
2. A buoyant wire-rope having the cork or other buoyant material enclosed
within a waterproof envelope of gutta-percha, caoutchouc, india-rubber or the
like, substantially as herein described.
Dated this 23rd day of July 1896.
G. G. M. HARDINGHAM.