July 8, 1969
"
3,454,261
'J. S- NACHAZEL
‘COATED BARBED WIRE >
Filed April 20, 1967
INVENTOR
John S. Nochazel
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ORNEYF
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United States Patent Office
3,454,261
Patented July 8, 1969
1
2
3,454,261
ing against it can cause removal of the crimps by stretch
ing of the strand wire. In addition, the manufacture of
COATED BARBED WIRE
John S. Nachazel, Englewood, Colo., assignor to CF & I
Steel Corporation, Denver, Colo., a corporation of
Colorado
Filed Apr. 20, 1967, Ser. No. 632,409
Int. Cl. E04h 17/04, 17/06; B21f 25/00
US. Cl. 256-2
9 Claims
ABSTRACT OF THE DISCLOSURE
A barbed wire having a strand wire coated with a
resilient material and barbs wrapped around the strand
wire in compressive engagement with the coating.
such wire is complicated by the necessity of forming
these crimps. Not only is a separate operation required
to produce these crimps but the apparatus for attaching
the barbs must be speci?cally designed to take into ac
count that the wrapping of the barbs about the strand
wire will be at locations where the strand wire is not
uniform in shape as it would be if it were an uncrimped
10 wire.
Another type of single strand barbed wire speci?cally
designed for holding the barbs is manufactured with
spaced portions having non-circular cross-sectional shape
and the barbs are secured .to these portions. Because of
15 the non-circular design, the barbs are prevented from
rotating about the axis of the strand wire; and to also
BACKGROUND OF THE INVENTION
prevent longitudinal movement, each non-circular por
tion of strand wire is bounded at both ends with a por
Field of the invention
tion having a ‘different cross-sectional shape, usually the
This invention pertains to barbed wire and more par 20 normal circular shape of conventional wire. As with the
crimped barbed wire construction, this type of barbed
ticularly to a barbed wire construction having a single
wire requires special manufacturing equipment for pro
strand wire to which the barbs are secured against move
ment.
Description of the prior art
ducing the desired cross-sectional pattern; and since the
barbs must bepositioned at prescribed points along the
25 strand wire rather than at randomly spaced locations,
‘ The use of barbed wire has for many years been the
such apparatus must also be designed to so locate and
attach the barbs.
SUMMARY OF THE INVENTION
attached to the strand wire in such a way whereby they 30
In accordance with the teachings of the present inven—
are effectively ?xed and are not subject to being either
tion, a single strand barbed wire of simpli?ed construc
rotated about the strand wire or moved longitudinally
tion is provided in which the barbs thereof are securely
therealong. In the past,v this, requirement has been satis
anchored against both rotation and longitudinal move
?ed by constructing the barbed wire with double strand
ment. With applicant’s construction, not only are the
accepted way of fencing in land and providing a deter
rent against trespass especially by animals. To make ac
ceptable barbed wire, it is necessary that the barbs be
wires or by'using a'single strand wire which is speci?cally 35 barbs held securely in place; but in addition, the wire
designed to lock the barbs thereon. In either case, these
prior constructions possess certain disadvantages either
possesses other advantages such as resistance .to Weather
deterioration and enhanced insulation characteristics.
from the standpoint of effectiveness or cost.
Generally, applicant’s barbed ‘wire includes three ele
‘With the double strand wire construction, the barbs
ments, namely a strand wire, a coating of resilient ma
are ?rst secured to one of the strands by tightly wrapping 40 terial on the strand wire and a plurality of barbs wrapped
them therearound and then the two strands are twisted
about the strand wire in compressive engagement with
together. The twisting of the two strand wires securely
the coating.
fastens the barbs in place to prevent any movement
In manufacture, the strand wire is ?rst coated with the
thereof. Although barbed wire constructed in this manner
resilient material and then the coated wire is passed
has been found acceptable as far as its effectiveness is 45 through a conventional barbed wire machine in which
concerned, the cost of such wire is relatively high. This
the barbs are wrapped about the strand wire at desired
is due to the fact that two separate strand wires are re
locations in the usual manner as by producing a number
quired thus almost doubling the amount of material used
of tightly wrapped turns in the barbs. This wrapping
as compared to a single strand construction. In addition,
causes a compression of the underlying portion of the
the manufacture of such double strand wire requires ap 50 coating, and due to the fact that the coating is resilient
paratus for producing the twisting of the strands after
and continuously tends to return to its uncompressed
the bars have been secured thereby making its cost of
condition, this compression causes the underlying coating
manufacture greater than would be the case with single
to exert a pressure on the turns of the barb to hold them
strand barbed wire.
securely in place and thus prevent both rotation and longi
With a single strand barbed wire, the barbs are at 55 tudinal movement along the strand wire.
tached by wrapping a number of turns of the barbs about
BRIEF DESCRIPTION OF THE DRAWINGS
the Wire with the securement of the barbs in place being
dependent on the tightness of such wrapping. It is ap
FIG. 1 is a plan view of a section of barbed wire con
structed in accordance with the teachings of the inven
parent, however, that this type of construction does not
provide a positive locking of the barbs in place and that 60 tion;
any looseness in the wrapping of the turns will produce
'FIG. 2 is a cross-sectional view of the portion of the
an unsatisfactory condition.
barbed wire at which one of the barbs is attached, drawn
Attempts have been made in the past to produce single
on a slightly enlarged scale; and
strand barbed wire having some special structure or de
FIG. 3 is a cross-sectional view taken along lines 3-—3
sign whereby the barbs are held against movement. With 65 of FIG. 1 and drawn on a slightly enlarged scale.
one type of single strand barbed wire, the strand wire
DESCRIPTION OF THE PREFERRED
is constructed with a continuously crimped contour with
EMBODIMENT
the crimps being small in length as measured along the
As
shown
in
the
drawings, the bar-bed wire comprises
wire so as to provide some degree of restraint against
shifting of the barbs. Barbed wires of this construction 70 a strand wire 1, a coating of resilient material 2 and a
plurality of barbs 3 Wrapped ‘about the coating. The
are not, however, completely satisfactory since there is
strand wire is preferably a steel wire and the barbs are
the possibility that when the wire is used, animals press
3
3,454,261
made of aluminum wire or a galvanized or aluminized
steel wire; however, it is to be understood that other
similar materials can be used for these members.
The coating applied to the strand wire is, in accord
ance with the teachings of the present invention, a re
silient material as for example, a suitable rubber or
4
in the ?eld. Also, electrical impulses may be sent through
the strand wire for purposes of telephonic communica
tion if desired.
With applicant’s construction, as described above, the
cost of manufacture is considerably reduced over double
strand barbed wire due to the elimination of nearly half
plastic such as polyvinyl chloride. The coating is applied
of the material used to make the product. Applicant’s
to the strand wire to provide a substantial thickness as
construction is also less expensive and easier to manu
facture than the single strand constructions that are
shown in FIG. 1 so that the portion underlying the turns
4 of the barbs can be su?iciently compressed against the
underlying portion of the strand wire to produce the
presently available due to the fact that conventional
barbed Wire machinery need not be modi?ed; and in
desired pressure acting against these turns and locking
stead, it is only necessary to initially coat the strand wire
them in place.
with the resilient material before feeding it through the
machine.
The above description of the present invention has
The coating may be applied to the strand wire by any
suitable means such as spraying, extruding or dipping.
If the coating is applied by extruding, the base wire is
been made with reference to the presently preferred em
bodiment; however, it is to be understood that various
or aluminizing it so as to prevent rusting of the strand
changes may be made thereto without departing from the
Wire as might otherwise occur when used out in the ?eld.
scope of the invention as set forth in the following claims.
An extruded coating simply envelops the strand wire 20
I claim:
and consequently moisture can creep in between the coat
1. A barbed wire comprising:
ing and the strand Wire at its out ends. In addition, mois
(a) a single strand wire;
ture can also creep through the extruded coating due
(b) a coating of resilient material on said single strand
?rst provided with a rust preventative as by galvanizing
to the microscopic porosity. With the underlying rust
preventative, contact of this moisture with the bare steel 25
wire will be prevented.
Where the coating is applied by spraying or dipping
the strand is initially primed so as to obtain a good bond
between the coating material and the underlying wire.
When the coating is bonded to the strand wire, no mois 30
ture can creep in between the coating and the wire; and
therefore, the application of any rust preventative is not
necessary.
In manufacturing the barbed wire, the coated strand
wire is fed, through a conventionally constructed barbed 35
wire machine and the barbs are attached thereto in the
conventional manner. Such machines are constructed to
wrap the barbs tightly around the strand wire; and with
the coating already having been applied to the strand
wire, this operation will cause the turns of the bards to 40
compress the coating as clearly shown in FIGS. 2 and 3
of the drawings. Conventional barbed wire machines are
also constructed for producing tension curves in the
strand wire as it is fed through the machine and such
curves may be produced in the applicant’s coated wire 45
without requiring any modi?cation of the machinery.
These tension curves consist of very shallow deforma
tions in the Wire spaced at intervals therealong and they
enable the resulting wire to contract and expand ‘with
variations in temperature without causing breakage of the 50
wire.
A speci?c example of the barbed wire constructed in
accordance with the teachings of the present invention in
cludes a steel strand wire having a diameter of 0.103”, a
coating of polyvinyl chloride plastic material having a 55
thickness of 0.0105" and a plurality of two~pointed barbs
made of number 14 round aluminum wire having a
diameter of 0.080".
With applicant’s coated barbed wire construction, not
only are the barbs held securely against rotation and
longitudinal movement along the strand wire; but in
addition, the coating acts as a protective cover prohibiting
wire; and
(c) barbs connected to said coated strand wire, said
barbs including at least one turn wrapped around
said strand wire in compressive engagement with the
underlying coating on said strand wire to reduce the
thickness of the underlying coating and with said
coating exerting pressure on the turns of said barbs
to hold them in place.
2. A barbed wire according to claim 1 wherein:
(a) said underlying coating is reduced to a thickness
less than the thickness of the remaining portion of
the coating by the turns of said barbs.
3. A barbed wire according to claim 2 wherein:
(a) said strand wire includes a continuous coating of
said resilient material.
4. A barbed wire according to claim 3 wherein:
(a) said strand wire and barbs are constructed of wire
having a circular cross-sectional shape.
5. A barbed wire according to claim 4 wherein:
(a) said coating is bonded to said strand wire.
‘6. A barbed wire according to claim 5 wherein:
(a) said coating is polyvinyl chloride plastic.
7. A barbed wire according to claim 6 wherein:
(a) said strand wire is a steel wire; and
(b) said barbs are constructed of aluminum wire.
8. A barbed wire according to claim 7 wherein:
- (a) the thickness of said coating is about 1A0 the diam
eter of said strand wire.
9. A barbed wire according to claim 8 wherein:
(a) said strand wire has a diameter of about 0.103
inch;
(b) said coating is about .0105 inch in thickness; and
(c) said barbs have a diameter of about 0.080 inch.
References Cited
UNITED STATES PATENTS
943,413
2,310,668
12/1909
2/1943
Hoxie ______________ __ 256-7
Nelson _____________ __ 256-6
weather deterioration and ‘as an insulation for the wire
DENNIS L. TAYLOR, Primary Examiner.
so that it may be used as a conductor of electricity. An
advantage of this is that the strand wire can be con 65
US. Cl. X.R.
nected into a closed electrical circuit and thus provide
a means for detecting breakage after it has been placed
I40—58; 256—-7
PO-1050
/
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UNITED STATES PATENT OFFICE
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CERTIFICATE OF CORRECTION
Patent ‘No.
3, 454 , 261
Dated
Inventor(s)
John S .‘ Nachazel
Julv 8L 1969
’
It is certified that error appears in the above-identified patent
and that said Letters Patent are hereby corrected as shown below:
I...
Page 1, Column -l ,_ li_ne S2 — "bars" should read ——barbs——
Page 2 , Column 3 ,
line 40' — "bards" should read ——barbs--_
_
SEALED
.
FEB 171970
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WILLIAM’ l. m. m.
Aues?ng Office}
commissioner of Patents
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