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Патент USA US2406663

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-Al1g. 27, 1946.
R CASE
WIRE-TRANSPOSING DEVICE
Filed April 6.,'.1944
2 Sheets-Sheet 1
6
4
INVENTOR
' _Rogers Case
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Aug. 27,1946.
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R CASE
2,406,663
WIRE-TRANSPOS ING DEVICE
Filed April 6, 1944
2 Sheets-Sheet _2
'
INVENTOR
2,406,663
Patented Aug. 27, 1946
UNITED STATES PATENT OFFICE
2,406,663
WIRE-TRANSPOSING DEVICE
Rogers Case, Orange, N. J.
Application April 6, 1944, Serial No. 529,805
4 Claims. (C1. F14-@33)
1
This invention relates to a device for trans
posing the Wires of a communication line, and
constitutes a specialized improvement over the
transposition device disclosed in my co-pending
application Serial No. 475,286, ñled February
9, 1943, issued August 29, 1944 as Patent No.
2,356,750 of which this constitutes a continua
tion-impart.
A problem encountered in the erection of com
munication lines adapted to convey messages by
the “carrier” system, is that such system re
quires transposition oi the two paired line wires
at definite minimum intervals throughout each
section or division of the system. If, as is usual,
transposition brackets are mounted on the line '
2
generally satisfactory to eiïect the transposition
under straight line arrangement of the line wires,
whichV is most commonly encountered, serves ap
proximately to equalize the reaches off two paired
wires extending between poles under special cir
cumstances; namely, when two poles are placed
close together in a locality at which an abrupt
change in the direction oi the line is made.
Another object of my invention is to provide
for so doing by means of a transposition bracket
which is simple and sturdy in its structure, and
in which the arrangement of the insulators is
such as to space Vthe wires substantially from
each other in one plane when they are brought
close together in another plane for transposition.
In eiïecting this purpose, I place the insulators
poles which support between them reaches of the
of the bracket in symmetrical arrangement with
communication wires, it is necessary for satis
respect to the transverse central line of the
factory “carrier” communication that the poles
bracket; with two of the cooperative insulators
be spaced no further than the required minimum
distance. Such exact spacing of the poles is, in 20 mounted on opposite sides of the base element of
the bracket and widely spaced from each other
many localities, extremely diñicult or even im
along the base of the bracket, and with the
possible. In converting from the phantom sys
other two insulators mounted on' opposite sides
tem to the “carrier” system, the problem is even
of the base close to the transverse central line
greater because poles have already been set and
some oi them are always set throughout any ex 25 of the bracket, and preferably in> vertical axial
alignment with each other in a position offset
tended stretch of line in accommodation to local
from» a line passing through the axes of the first
conditions rather than to proper spacing. Ex
pair.
act spacing under such circumstances, there
In the accompanying drawings illustrative of
fore, would require withdrawing poles which have
already been set and replanting them in accord- ‘ my invention:
Fig. 1 is a plan View of my transposition de»i
ance with a requirement, which is of itself fre
vice, or bracket, showing two line wires transw
quently difficult or impossible to meet.
posed by the bracket.
The transposition device, or bracket, disclosed
_ Fig. II is a side elevational View of the bracket.
in my above-identiñed application, and which
Fig. III is a cross-sectional View through the
may be considered to be my standard form of
bracket taken in the plane of the section line
bracket, consists of a single frame element freni
III-_III of Fig. I.
each of the opposite sides of which project two
Fig. IV is a schematic view illustrating the
insulators, the four insulators of the bracket
use of a bracket as shown in Figs. I to III in
being mounted in approximately rectangular ar
elusive of the drawings.
rangement, and the two insulators on each side
Fig. V is a similar schematic view showing
of the frame, or base, element being arranged
the same bracket reversed in its mounting on
diagonally. The insulators may be of any suit
the line wires.
able spool form and made of porcelain, glass, or
Fig. VI is a schematic view analogous in its
other suitable insulating material.
general arrangement to the showing oi Fig. IV,
A transposition bracket, such as that disclosed
but showing a slightly modiñed form of bracket.
in my above-identiñed application, serves to
In the drawings, reference letter A designates
transpose the line wires in such manner as to
one wire of the pair forming a communication
preserve equal length and weight of copper in
line, and reference letter B designates the other
the reaches extending on both sides of the trans
position point, and is arranged to separate the 50 conductor wire' of the line. These wires are
shown uninsulated, as is usual in conductor wires
two wires, which normally are uninsulated, a sub
oi that sort. The bracket structure has a base,
stantial distance in their mounting on the
or frame element, designated generally by ref
bracket.
erence numeral I, which desirably is a flat steel
The primary object of my present invention
is to provide a transposition bracket which, While 55 or iron stamping of substantial thickness, but
i.
2,406,663
4
which may be made of any other metal or other
tical dimension is substantial. The closest hori
material formed in any suitable manner, pro
Zontal approach of the wires to each other is at
vided, however, that it has in the bracket a
the vertically aligned insulators 6 and 1, in
stiffness and tensile strength closely approxi
which region they are spaced in the vertical plane
mating that oi’ a substantial steel stamping.
by their position in the grooves of the insulators,
On the base are two wire-contacting and wire
and are insulated positively from each other by
training insulators 2 and 3, which are spaced
the insulator bodies in the grooves of which they
apart along the base and which project from op
lie.
,
posite sides thereof. These insulators may be
Assuming the particular condition for which
of any desired form to provide specialized in 10 the transposition bracket of my present inven
sulatine conditions in the assembly, but are shown
tion has speciñc utility, we will assume that the
as spool-form insulators of the simplest structure,
wire B is the inner and shorter wire leading
having wire-receiving grooves 4. They are
from a crossarm from which the paired wires
mounted by insulator pins 5 which are shown as
extend at a substantial angle to the adjacent
bolt-form. The spaced-apart wire-contacting
reach of the wires. In order, therefore, that the
and wire-training insulators 2 and 3 need not be
transposition be so made as to give approximately
rotatable on the base. Offset from the spaced
equal Weight and length in the individual reaches
apart insulators 2 and 3, there is a second pair
of the wires between poles, the surfaces of the
of wire-contacting and wire-training insulators
two vertically aligned insulators are mounted in
6 and l, which are mounted to project on oppo
line with this wire B.
site sides of the base l. As shown in Figs. I to V
This use of the bracket is shown in Figs. IV, V,
inclusive, these insulators 6 and 'l are arranged
and VI of the drawings, in each of which the wire
in vertical axial alignment by their mounting on
B is the shorter length of wire extended between
a common bolt-form insulator pin 8. The ver
two crossarms 9 and I0, one of which 9 is at less
tically aligned insulators 8 and 1 are, as shown,
than a right angle to the direction of the reach
of the same simple spool-form as the spaced
of paired wires; and A is the longer wire of the
apart insulators 2 and 3, and similarly need not
pair, In the arrangement of Figs. IV and V, both
be rotatably mounted.
the vertically aligned insualtors 6 and 1 of the
In their mounting, the insulators are relatively
bracket C lie in the line, or individual reach,
so placed that the substantially spaced-apart in
which normally would be composed wholly of
the shorter wire B. The training of the wires A
cally aligned pair of insulators 6 and 1, and the
and B around the insulators is as previously dis
last-named pair of insulators is spaced from a
closed with reference to Figs. I, II, and III. The
line passing through the axes of the mutually
substantially spaced-apart insulators 2 and 3 lie
spaced-apart insulators a distance equal to the
in the line which normally would be composed
standard or desired spacing between the line
wholly of the longer wire A. There being no wire
wires in their reaches from pole to pole. As
extended directly between the insulators 2 and 3,
shown, the insulators 2 and 3 have their adja
there is subtracted from that initially longer reach
cent surfaces at which the wires turn spaced
a length of wire equal to the distance between
approximately that distance. All the insulators, 40 the points on these insulators at which the wires
like those of my above-identified standard
A and B are turned away from and brought into
bracket, may be made of porcelain, glass, or any
line. If we assume that the angularly disposed
other suitable insulating material.
'
crossarm 9 is at an angle of from about 45° to
It being understood that the transportation
the crossarm I0, this deletion of wire from the
bracket is supported wholly by the line wires and
longer reach causes the actual wire in the two
serves additionally as a spacer and tightener for
reaches closely to approach equality, with the di
them, it may be worked into transposing position
mensioning of the bracket as shown. If the an
on the wires by manipulation and lateral inser
gularity of crossarm 9 be moderately greater or
tion. This may be done from a pole, and the
less than 45° (the same relative dimensions of
bracket then may be pulled into accurate trans 50 the bracket being retained) equality in the length
posing position by means of a “come-along”, or
of wire in the two individual reaches still will be
the like means for pulling the bracket along the
approximated. For angles much less than 45°,
wire. Referring to the drawings, it will be seen
a bracket in which the insulators 2 and 3 are
that the wire A is brought into contact with the
mounted closer together may be used, and for
uppermost insulator 6 of the vertically aligned
angles much greater than 45°, a bracket having
sulators 2 and 3 are equidistant from the verti
pair to lie in the wire-reeciving groove 4 thereof,
and is also trained around that one of the spaced
apart insulators, namely the insulator 2, which
30
those insulators spaced further apart is desirable.
In the modiñed bracket of Fig. VI, designated
D, the two insulators Ea and 'la are mounted on
opposite sides of the base I, and close to the trans
the line wire B, which, for distinction, is indi 60 verse center line of the bracket in symmetrical
cated in dot and dash lines in the drawings, is
relation thereto. The spacing between the axes of
trained around the insulator ‘I of the vertically
these insulators 5a and 1d is so close as compared
aligned pair, and around that one of the spaced
with the spacing between the axes of the insula
apart insulators, namely the insulator 3, which
tors 2a and 3d of this modiiîed bracket, that the
lies on the same side of the base I. Considera 65 lengths of wire extended between them and the
tion will show that this may be done wholly by
insulators 2d and 3a lie at a substantial angle to
lateral insertion, without cutting and splicing the
the transverse center line of the bracket. That
lies on the same side of the base l.
Similarly,
wires.
is, the wire A is, as shown -in Fig. VI, trained
around the insulator 2a, which is the upper mem
the two line wires are spaced vertically from each 70 ber of the pair of widely spaced insulators, and
other by being brought into upper and lower
over the nearest insulator 6a of the closely spaced
levels. One wire being trained wholly by the in
pair, which insulator also projects from the upper
sulators on one side of the base and the other
side of the base. Similarly, the wire B carries on
being trained wholly by the insulators on the
below insulator 6a to insulator la of the closely
other side of the base, this spacing in the ver 75 spaced pair and from it is trained around the in
It will be seen that as so trained on the bracket,
escasas
5
sulator 3a, which is the insulator of .the widely
spaced pair which lies closest to it, 'and also pro
6
tf and ‘l and providing anchorage for their brac
ing straps. In the modification of Fig. VI, the
jects from the under side of the base. It will be
central leg (d is made of increased width, to per
seen in Fig. VI that although each of the wires is
mit the slight horizontalr spacing of the insulators
extended between the nearest insulators o'f the
6a and la.
two pairs, without crossing the wires, the lengths
Having described a specific embodiment of a
of wire extended between the insulators lie at a
transposition bracket in accordance with my in~
substantial angle to the transverse center line of
vention, it is to be understood that the invention
the bracket, because of the relatively great dif
herein is not to be strictly limited t0 the specific
ference in the symmetrical spacing of the insula 10 structural
„ils as shown and described, but
tors composed of the two pairs with respect to the
that changes in structure and arrangement com
transverse center line of the bracket. Although
ing within the bounds of the appended claims may
this angularity is not so great as when the insu
be made without departing from the invention as
lators are brought directly into the transverse
deiined therein.
center- line, it is as shown adequate firmly to en 15
I claim as my invention:
gage the bracket in the line.
1. A transposition bracket for mounting on
The modified bracket of Fig. VI thus illustrates
paired line wires comprising a rigid insulator
that a moderate symmetrical separation of the
carrying base, and two pairs of wire-contacting
insulators oi one pair from the vertically aligned
and wire-training insulators mounted on said
arrangement of Figs. I to III inclusive is permis 20 base with the insulators of each pair arranged
sible. When arranged as shown, it suitably may
symmetrically with respect to the transverse cen
be used when the dimensions of the bracket are
ter line of the base to project oppositely from
altered by increased spacing of the more widely
the plane of the base; the insulators of one said
spaced insulators in accommodation to an in~
pair being widely spaced from the transverse
equality in the length of the reaches caused by
center line of the bracket, and the insulators of
an angularíty of one cross-arm substantially
the other pair being mounted in vertical align
greater than a 45° angle with a perpendicular to
ment in the transverse center line of the bracket,
the line. This modified form of bracket presents
so that with the bracket mounted by lateral in
advantage in its physical balance, but requires a
sertion »across the line to transpose the wires
more extended width of the base structure on
thereof the widely spaced pair of insulators lies
which to mount the closer insulators than if they
in one reach of the line and the vertically aligned
both are brought directly into the transverse cen
pair lies in the other reach thereof with the two
ter line of the bracket.
line wires transposed by the training of each on
It will be clear that either form of my trans
two insulators which project from the same side
position bracket will serve the paired wires of a
of the base.
communication line in the absence of any change
2. A transposition bracket for mounting on
paired line wires comprising a rigid insulator-.
in direction, by placing the brackets in closely
spaced relation in the line and by reversing the
carrying base, and two pairs of wire-contacting
mounted position of adjacent brackets, For this
and wire-training insulators mounted on said
base with the insulators of each pair arranged
purpose, however, it is to be considered in meas
symmetrically with respect to the transverse cens
ure less desirable than my standard form of
ter line of the base to project oppositely from the
transposition bracket, for the reason that (even in
the mcdiiied form of Fig. VI) the physical strain
plane of the base; the insulators of one said pair
being widely spaced from the transverse center
on the bracket caused by the pull of the wires is
not so well balanced as in my previous structure,
line of the bracket, and the insulators of the
and because a greater number of brackets desir
other pair being mounted each `at least so close
ably is used.
to the transverse center line of the bracket that
The transposition bracket as so far described
with the bracket mounted by lateral insertion
across the line with the widely spaced pair of
may be used satisfactorily provided the insulator
pins are made of high-carbon heat-treated steel 50 insulators in one reach of the line and the other
to sustain the pull of the wires. Desirably, how
pair in the other reach thereof and with the two
line wires transposed by the training of each on
ever, the insulators are, as shown, reinforcingly
supported as by bracing straps. Each such strap
two insulators which project from the same side
H is Shown in the drawings as an angular mem
of the base, the wires extended in uncrossed re
ber having a pe forate foot Ila, which extends 55 lation between the insulators lie at substantial
over the top of its associated insulator t0 lie under
angles to the transverse center line of th
bracket.
'
the head of the insulator pin; and a perforate
foot i ib, which is secured to the base I as by riv
3. A transposition bracket for mounting on
eting. It will be noted that the several straps II
paired line wires comprising a rigid insulator
extend opposite those surfaces of their associated
carrying base, two pairs of wire-contacting and
insulators which contact the line wires, so that
wire-training insulators mounted on said base
they do not interfere with the positioning of the
with the insulators of each pair arranged sym
bracket, and do oppose the pressure of the wires
metrically with respect t0 the transverse center
on the insulators. The provision of the described
line of the base to project oppositely from the
braking straps is equally desirable in the modi
plane of the base; the insulators of one said pair
iied form of bracket shown in Fig, VI as in the
being widely spaced from the transverse center
preferred form shown in Figs. I to III inclusive.
line of the bracket, and the insulators of the
Desirably, for purposes of lightness and econ
other pair being mounted in vertical alignment
omy but not essentially, the base l of the bracket
in the transverse center line of the bracket, so
is so cut away that it is of an approximate E
that with the bracket mounted by lateral inser
shape, with the spaced-apart insulators 2 and 3
tion across the line to transpose the wires there~
mounted on the base portion la of the “EL” with
of the widely spaced pair of insulators lies in one
relatively short legs ib and lc arranged to mount
lreach of the line and the vertically aligned pair
the bracing straps li; and with a longer central
lies in the other reach thereof with the two line
leg ld carrying the vertically aligned insulators 75 wires transposed by the training of each on two
2,406,663
8
insulators which project from the same side of
the base, and bracing members organized with
the said insulators in mounted position to resist
the thrust of the line Wires thereagainst.
4. A transposition bracket for mounting on
to the transverse center line lof the bracket that
with the bracket mounted by lateral insertion
across the line with the Widely spaced pair of in
sulators in one reach of the line and the other
pair in the other reach thereof and with the two
line wires transposed by the training of each on
two insulators which project from the same side
of the base, the Wires extended in uncrossed re
Wire-training insulators mounted on said base
lation between the insulators lie at substantial
with the insulators of each pair arranged sym
metrically with respect to the transverse center 10 angles to the transverse center line of the brack
et, and bracing members organized with the said
line of the base to project oppositely from the
insulators in mounted position to resist the
plane of the base; the insulators of one said pair
thrust of the line wires thereagainst.
being Widely spaced from the transverse center
line of the bracket, and the insulators of the
ROGERS CASE.
other pair being mounted each at least so close 15
paired line wires comprising a rigid insulator
carrying base, two pairs of wire-contacting and
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