Improvements in the Manufacture of Wire-ropes.
Year: 1896

page_text: Date of Application, 2nd June, 1890
Complete Specification Left. 1st Mar.. 1897-Accepted, 3rd Apr., 1897
Date of Application, 2nd June, 1890
Complete Specification Left. 1st Mar., 1897-Accepted, 3rd Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of 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, ot Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) to be as follows:-
The object of this invention is to afford a smooth support or foundation for the
covering wires of wire-ropes or strands, with a view to enabling the covering wires
to be in contact with this foundation over their whole length. If the foundation
be composed of round wires, the covering wires touch them only at certain points,
with the result that when the rope is in use or under strain the covering wires are
apt to bend. This defect is especially noticeable in the case of guide ropes for
aerial purposes, their premature deterioration resulting.
To secure a smooth foundation, one or more layers of locked or shaped wires,
preferably of annular segmental section are used; these being laid up about a core
of any desired character. About the smooth foundation so formed the covering
wires are laid. The covering may be composed of round wires, or of round wires
having one side flattened, or of wires of semi-circular cross section, the flattened
side being arranged in contact with the smooth surface of the foundation.
By this mode of manufacture, ropes are obtained in which the outer points of the
covering wires lie in a circle; that is to say, the crowns of the covering wires are
equidistant from the centre of the rope.
Dated this 2nd day of June 1896.
G. G. M. HARDINGHAM.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of 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,) 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 this invention is to afford a smooth support or foundation for the
covering wires of wire-ropes or strands, with a view to enabling the covering wires to
If the foundation be
be in contact with this foundation over their whole length.
composed of round wires, the covering wires touch them only at certain points,
with the result that when the rope is in use or under strain the covering wires are
apt to bend. This defect is specially noticeable in the case of guide ropes for
aërial purposes, their premature deterioration resulting.

page_text: The accompanying drawings illustrate, in transverse section, wire-ropes
constructed in accordance with this invention.
Fig. 1 represents a rope wherein covering wires of circular cross section are
used;
Fig. 2 a wire rope wherein the covering wires are formed with a slightly flattened
side, and
Fig. 3 a wire-rope wherein the covering wires are of semi-circular cross section,
and wherein the core is composed of wires of wedge- or V-section.
To secure a smooth foundation, one or more layers of locked or shaped wires a,
preferably of annular segmental section are used; these heing laid up about a
core of any desired character, such, for example, as a single wire, a strand of
wires, or a strand of wires having an inner core of hemp. About the smooth
foundation a so formed the covering wires (c) are laid. The covering may be
composed of wires of any suitable cross section; as for example round
wires (c, Fig. 1) or round wires having one side flattened (ex, Fig. 2) or wires of
semicircular cross section (co, Fig. 3); the flattened side, when used, being
arranged in contact with the smooth surface of the foundation.
By this mode of manufacture, ropes are obtained in which the outer points of the
covering wires lie in a circumferential line or circle; that is to say, the crowns of
the covering wires are equidistant from the centre of the rope.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
1. A wire-rope or strand having a core enclosed within an envelope composed of
locked or shaped wires which present a smooth surface for the support of the
covering wires.
2. A wire-rope or strand wherein the covering wires (c, ex or c°) are supported
upon a foundation of locked or shaped wires (a) which present a smooth surface,
substantially as herein described.
Dated this 26th day of February 1897.
G. G. M. HARDINGHAM.