Improvements in the Manufacture of Fencing Wire.
Year: 1892

page_text: Date of Application, 8th July, 1892
Complete Specification Left. 10th Apr., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Fencing Wire.
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 and
Guilleaume, of Mülheim on the Rhine, in the German Empire, Cable Manufacturers,)
to be as follows:-
This invention relates to the manufacture of twisted fencing wire, and consists
in the employment of two wires each of which is triangular in cross section, and
when laid together base to base present a cross section of diamond shape.
Fencing wire formed of two triangular wires in comparison with fencing wire
formed of cylindrical wires of equal sectional area presents a larger superficial
area and is therefore more readily visible. Owing moreover to its sharp edges, it
has a deterrent effect on human beings (children) and animals.
Twisted bipart diamond wire of the kind above described may be employed as
the body wire in the manufacture of barb-wire for fencing purposes.
Under such
circumstances, instead of laying one member of the main or body wire outside
the coils of the barb-wire (in order to prevent the latter turning and sliding on the
other member of the main or body wire, about which they are twisted) the barb-
wire coils envelop both parts of the body wire; but, owing to the sectional form of
the latter, are prevented turning and sliding thereon. The process of manufacture
is moreover both simplified and cheapened; inasmuch as the barb-wire coils are
applied to the already-twisted main wire, instead of the twisting process being
carried out after the barb-wire coils have been applied.
My foreign correspondents are aware that the employment of a single spirally-
twisted wire of triangular, square or other regular or irregular section, for use as
the main or body wire of barb-wire fencing, has been proposed by Glidden, Haish
and others; but, as compared with any such mode of manufacture, the present
invention presents distinct advantages, inasmuch as the hereinbefore-described
improved barb-wire fencing can be manufactured in greater lengths free from joint,
is more elastic and therefore more readily accommodates itself to the effects of
heat and cold, and, in the course of manufacture, is more easily twisted than a
diamond-shaped wire of the same cross section, but solid instead of in two parts.
Dated this 8th day of July 1899
G. G. M. HARDINGHAM.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Fencing Wire.
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 Mulheim on the Rhine, in the German Empire, Cable Manufacturers,)
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 the manufacture of twisted fencing wire, and consists
in the employment of two wires, each of which is triangular in cross-section, and
when laid together base to base present a cross section of diamond shape.
In the accompanying drawings, which serve to illustrate this invention,
Fig. 1 is a side elevation of a piece of the improved twisted fencing wire

page_text: furnished with barbs; Fig. 2 being a section on the line xx in Fig. 1, and
Fig. 3 a side view showing the barb in section on the line y y in Fig. 2.
A and A' are the two triangular wires twisted together; C being the barbed
coils, which may be formed of triangular wire as shown, or may be of cylindrical,
half-round or other wire, if preferred.
Fencing wire composed of two triangular wires in comparison with fencing wire
formed of cylindrical wires of equal sectional area presents a larger superficial
area and is therefore more readily visible. Owing moreover to its sharp edges, it
has a deterrent effect on human beings (children) and animals.
Twisted bipart diamond wire of the kind above described may, as shown in the
drawings, be employed as the body wire in the manufacture of barb-wire for fencing
purposes. Under such circumstances, instead of laying one member of the main
or body wire outside the coils of the barb-wire (in order to prevent the latter
turning and sliding on the other member of the main or body wire, about which
they are twisted), the coils of each barb C envelop both parts A and A of the
body wire; but, owing to the sectional form of the latter, are prevented turning
and sliding thereon. The process of manufacture is moreover both simplified and
cheapened; inasmuch as the barb-wire coils are applied to the already-twisted
main wire, instead of the twisting process being carried out after the barbs have
been applied.
In a four-pointed barb made of triangular wire, the barb-wires, when coiled
round the body-wire, are pressed together, under the strain exerted by the machine,
so closely that they overlie one another; the two wires thus keeping each other in
position, so that the barbs are less liable to become loose. It results that a barb
made of triangular wire is tightly fixed when given fewer turns round the body-
wire than would be necessary with cylindrical wire. In the drawings, each of the
wires c and c¹ makes only one complete turn round the body-wire.
My foreign correspondents are aware that the employment of a single twisted or
spiral wire of triangular, square or other regular or irregular section, for use as
the main or body wire of barb-wire fencing, has been proposed by Glidden, Haish
and others; but, as compared with any such mode of manufacture, this invention
presents distinct advantages, inasmuch as the herein before-described improved barb-
wire fencing can be manufactured in greater lengths free from joint, is more elastic
and therefore more readily accommodates itself to the effects of heat and cold, and,
in the course of manufacture, is more easily twisted than a diamond-shaped wire of
the same cross-section, but solid instead of in two parts.
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. The improved fencing-wire consisting of two triangular wires A and A' laid
base to base and twisted together, substantially as herein described.
2. The improved fencing wire consisting of two triangular wires laid base to
base and twisted together, and furnished with barbed coils, substantially as herein
described.
3. In fencing wire, the combination, with two triangular wires laid base to base
and twisted together, of barbed wires coiled about both the main wires, substantially
as herein set forth.
Dated the 8th day of April 1893.
G. G. M. HARDINGHAM.