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Патент USA US3091671

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May 28, 1963
R. w. HARMON
3,091,658
CONDUCTOR SPACERS
Filed Feb. 15, 1961
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26 37 2O 24 35
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INVENTOR.
ROBERT W. HARMON.
mam
ATTORNEY
United, States Patent 0’ "ice
1
3,091,658
3,091,658
Patented May 28, 1963
2
from the interior face thereof, the two studs being op
posed to form a pivot for the spacer bar ‘13.
CONDUCTOR SPACERS
Robert W. Harmon, Doylestown, Ohio, assignor to The
The body part 16 complements the body part 17 along
the portion thereof transversely outward from the pieces
()hio Brass Company, Mans?eld, Ohio, a corporation
of New Jersey
Filed Feb. 13, 1961, Ser. No. 88,870
20 and 21. The body part -16 is secured to the body part
'
'
'7 Claims.
(Cl. 174-428)
17 by two cap screws 26 which are suitably recessed in
openings in the top of the body part ‘16 and threaded into
openings in the body part 17. In circumstances where
it is desirable to limit the compressive forces on the cable
This invention relates to high voltage transmission lines
and, more particularly, to conductor spacers for transmis 10 14 and the parts 16 and 17, the ledge 27 on the body part
17 may be utilized as a stop for the body part 116 and
sion lines incorporating multiple conductors.
insures
that the parts engage the cable at a predetermined
The general purpose of the invention is to simplify
pressure when the set screws 24 are tightened.
the design and reduce the cost of transmission line spacers
The body part 16 is formed with an inwardly extending
while increasing the reliability and ease of installation
15 tongue or keeper 28‘ which extends downwardly and away
thereof.
from the body part 16 and between the pieces '20 and 21
Certain problems which arise in connection with the
design and construction of high voltage transmission lines
incorporating bundle conductors may be conveniently
solved by the employment of conductor spacers in which
the conductor cables are restrained against independent
rotational movement in a plane perpendicular to the con
ductors. Such independent rotational movements arise
because of the torsional forces in the conductors and spac
ers which are designed to prevent such movement are
and the studs 24 and 25 of the body part 117. The keeper
28 performs two functions, ?rst in pivoting upon the stud
23 to provide-an advantageous lever ratio, and thereby
improve the clamping action of the body part 16 against
the body part 17, and in closing the space between the
studs 24 and 25 to act as a retainer for the spacer bar 13.
The spacer bar ‘13 is constituted by two ?at metal pieces
29 and 30 which have the outer ends separated to form
arms 31 and 32 for the conductor clamp 11 and arms 33
designated as torsionally restrained spacers. Certain types
and 34 for the conductor clamp 12. Each pair of arms
of spacers embodying structures useful for providing
has aligned openings for receiving the studs of the associ
torsional restraint and possessing other advantages are
ated conductor clamp, as e.g. openings 35 and 36 in the
disclosed, for example, in United States Patent No. 2,97 3,
402, issued February 28, 19611, to John J. Taylor. The 80 arms 31 and 32 for the studs 24 and 25.
The bifuracte relation of the pieces of the spacer bar
present invention is concerned with improvements in
is such that the arms 31 and 32 are elastically compressed
one form of the transmission line spacers disclosed in
between the pieces 20 and 21 of the conductor clamp 11
the above referred to John J. Taylor application.
and engage the interior surfaces 37 and 38 thereof. Simi
The invention, together with the features and advantages
larly, the arms 33 and 34 are elastically compressed be
thereof, will be more understood by reference to the fol
tween spaced pieces of the lower body part of the con
lowing detailed speci?cation and claims, taken in con
ductor clamp 12. The elastic forces exerted between the
nection with the appended drawings, in which:
arms of the spacer bar serve to hold the spacer bar in
FIG. 1 is a plan view of a torsionally restrained spacer
place over the studs 24 and 25; provide a measure of
in accordance with the invention;
energy dissipating friction between the contacting sur
FIG. 2 is an elevation view, partly in section, of the 40 faces
of the arm and the conductor clamp, useful during
spacer of FIG. 1;
out-of-phase longitudinal motions; and insure a good
FIG. 3 is a section view of the conductor clamp taken
electrical connection between the spacer bar and the con
in the direction 3——3‘ in FIG. 2; and
ductor clamps. The two pieces 29 and 30 may be held
FIG. 4 is a section view of another embodiment of
together along the central part of the pieces by frictional
the conductor clamp of the invention.
45 forces (as shown); by interengaging projections and re
Referring now to FIGS. 1 and 2, the spacer 10 com
prises two conductor clamps 11 and 12 and a spacer bar
13. The conductor clamps 11 and 12 are attached to two
conductor cables 14 and 15 to hold the cables in trans
cesses; or by a screw fastener.
In FIG. 4 the arms 40 and 41 of the spacer bar are
compressively received between the pieces 42 and 43 of
lower body part 44 and pivotally carried on a pin 45
versely spaced relation and to permit independent move 50 the
which
extends through the pieces 42 and 43, the arms 40
ment of the cables only in the longitudinal direction. Ad
and 41 and the tongue 46. The tongue 46 is held centrally
ditionally, the spacer 10 forms an electrically conductive
between the arms of the spacer bar by means of bushings
path between the two cables 14 and 15 so that the cables
47 and 48 to prevent binding engagement of the tongue
function electrically as a single conductor of a transmis
with the arms of the spacer bar. The opening in the
55
sion line.
tongue through which the pin 45 is received and the length
The two clamps 11 and 12 are of the same construc
of the bushings 47 and 48 is such that the upper body
tion, shown in the sectional views of FIG. 2 and FIG.
part 49 may move freely with respect to the lower body
3. The clamp 11 comprises two metal body parts 16 and
part to permit insertion of the conductor cable in the
17, each formed as an integral cast piece. The body mem
cable grooves. The construction of FIG. 4 is useful in
bers are formed toward the transversely outward extrem 60 circumstances where the upper body part 49 must be
ity thereof with two longitudinally extending grooves '18
retained whether or not the clamping screws are in place.
and 19 in which the cable 14 is received.
The following claims are directed to combinations of
The lower body part 17 is formed along the transversely
elements which embody the invention or inventions of
inward extremity thereof into two pieces 20 and 21 which
this application.
are spaced in the perpendicular direction from the plane 65
I claim:
'1. A spacer for holding two conductor cables in spaced
determined by the cables 14 and 15. The piece 20' is
lateral disposition while preventing separate rotational
supported in spaced relation from the piece 21 by two
movement thereof, comprising a spacer bar and two con
columnar pieces 22 and 23 which are formed integrally
ductor clamps, one at one end and one at the remaining
with the body of the part. The piece 21} has an inwardly
end of the bar, each for connection to one of the cables
directed stud 24 projecting from the interior face there
and each conductor clamp comprising two body parts
of and the piece 21 has a stud 25 projecting inwardly
3,091,658
with opposed longitudinal cable receiving grooves ad
jacent the transversely outward extremity thereof, a ?rst
one of the body parts having a central part extending
transversely inward and having pieces thereof spaced apart
perpendicular to the plane of the cables, the spacer bar
having bifurcate end parts thereof received between the
two spaced pieces of the ?rst body part, pivot means for
the spacer bar comprising means carried by the ?rst body
part and extending at least through each of the bifurcate
4
the pivot means comprises opposed inwardly directed studs
having the adjacent ends thereof spaced apart perpendicu
lar to the plane of the ‘cables and in which a tongue ex
tends from the second one of the two body parts between
the studs, the tongue comprising a keeper for the second
body part and spacer bar.
5. The invention in accordance with claim 1, in which
the pivot means comprises a pin extending through open
ings in the spaced pieces of the one body part and through
end parts of the spacer bar, and screw fastener means 10 openings in the arms of the spacer bar.
extending between the two body parts for clamping the
6. The invention in accordance with ‘claim 5, in which
body parts together and upon a cable.
a tongue extends from the second one of the two body
2. The invention in accordance with claim 1 in which
parts between the end parts of the spacer bar and in
the ?rst body part is ‘formed with a longitudinally extend
which the pin extends through an opening in the tongue.
ing shoulder between the cable groove and the two pieces 15
7. The invention in accordance with claim 1, in which
and in which the screw means extends through the second
the bifurcate end parts of the spacer bar are elastically
one of the two body parts and into the shoulder for draw
compressed between the spaced pieces of the ?rst body
ing the second one of the two body parts toward the ?rst
part.
body part.
3. The invention in accordance with claim 2, in which 20
a tongue extends from the second body part to between the
end parts of the spacer bar.
4. The invention in accordance with claim 1, in which
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,973,402
Taylor ....__\ ________ __'__ Feb. 28, 1961
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