US2356750A

US2356750A - Wire-transposing device

Info

Publication number: US2356750A
Application number: US475286A
Authority: US
Inventors: Case Rogers
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-02-09
Filing date: 1943-02-09
Publication date: 1944-08-29
Anticipated expiration: 1961-08-29
Also published as: GB570790A

Description

a ulllllgl'mm f2 inn-mm Aug. 29, 1944. R, CASE 2,356,750

WIRE-TRANSPOS ING DEVICE Filed Feb. 9, 1943 2 Sheets-Sheet 1 INVENTOR .W afs Ca/ss las @$701,147

A118- 29, 1944. R. CASE WIRE-TRAN'SPOS ING DEVICE Filed Feb. 9, 1943 2 Sheets-Sheet 2 Patented Aug. 29, 1944 UNITED STATES PATENT OFFICE WIRE-TRANSPOSING DEVICE ltogers Case, Orange, N. J. Application February 9, 1943, Serial No. 475,286 s claims( (ci. 17e-3a) This invention relates to wire-transposing and resistance-balancing devices applicable to parallel paired wires to change their positions relative to each other.

In the telephone art, the capacity of a pair of transmission wires for simultaneously transmitting multiple messages hasbeen greatly increased over previously used systems by development of the so-called. carrier system. Successful use of the said system, however, requires transposition and balancing of the paired transmission wires at uniform distances, whereas the older phantom system has been somewhat flexible, some variation in the'spacing of transposition points being permissible. This permissible variation in spacing of transposition points in the phantom system, together with the difiiculties in spacing telephone poles at equal distances; due to ground conditions, and the general practice of transposing wires at points of support on poles, has caused transmission wires that have been installed for use in "phantcm systems to be transposed at unequally spaced points and therefore to be unsuitable for conversion to carrier" systems.A Alteration of the transposition and resistance-balancing points to suit carrier transmission has heretofore involved such great expense, due to necessity for resetting poles, cutting and splicing wires, etc., as to render such conversion prohibitive.

'I'he object of this invention is to provide a device for transposing and balancing paired wires carried by the wires themselves so that it may be positioned at any point along a transmission line; which is capable of installation on wires that are already strung without cutting the wires or disassembling the device, and which is arranged to afford adequate resistance to the crushing strain exerted by the wires tensioned upon such a device.

In the accompanying drawings:

Fig. I'is a perspective view of the wire-transposing and balancing device.

Fig. II is an elevation thereof, partially broken.

Fig. III is a plan view showing the arrangement of two such wire-transposing devices with respect to a pair of wires.

Describing the drawings in detail, the transposition and balancing device includes a base in the form of a plate I, desirably open-centered for lightness and saving in material and preferably of square outline. A pair of insulators designated 2 is mounted upon one surface of the plate and;

a second pair designated 3 is mounted on the other surface of the plate, to project oppositely those upon one side of the plate are located at differently diagonally opposed angles of a rectangle at the corners of which the four .insulators are arranged. Thus the insulators 2 of the drawings are located at diagonallyopposed angles of the square at the corners of which they and the other insulators 3 are arranged, and the insulators 3 are located at the other diagonally opposed angles ofsuch square.

The

insulators

2 and 3 are advantageously of spool type as shown and are mounted with their ends seated against the surfaces of the plate l by header pins 4 that penetrate the plate and central bores of the insulators and are secured in assembly by transverse cotter pins 5.

In service, each of the respective transmission wires, designated 6 and 1, is trained around opposite outer regions 8 of the lateral surfaces of the insulators forming one of the pairs, and extended between them and diagonally of the rectangle at the corners of which they are located.

To resist the overturning strains imposed upon thc insulators and their pin fastenings by the wires, each insulator is braced. This is accomplished by a strap 9 one end of which overlies the outer end of the insulator and is penetrated by the pin thereof, the strap being angled inwardly toward the plate to which its end is suitably secured, as by a rivet I0. These straps 9 are so arranged relative to the system of

insulators

2 and 3 as to leave clear passages extended between the outer surface regions 8 of the paired

insulators

2 and 3, and thereby avoid structures blocking or interfering with lateral insertion of continuous wires to the positions shown in Fig. III. The straps 9 are also arranged compressively to oppose the thrust exerted upon the insulators by wires trained about them in the indicated manner. Thus the straps 9 oi' all of the insulators extend from such insulators in directions opposite to the regions 8 in the lateral surfaces of the insulators; the brace for each insulator of a pair being extended toward an insulator on the opposite side of the base which lies on a same side of the rectangle formed by the insulators, and to connection with the base plate I. For simplicity the ends of the straps are superposed and are secured to opposite surfaces of the plate by a single rivet I0. The arrangement is such that each insulator has but one brace, so that the bracing is on two oppOSite sides of the rectangle.

It will be understood from the above that the device is readily applicable to paired wires, already strung in a transmission system, whether the system be old or new. slack which exists in all extended reaches of wires no matter how tightly they are strung, is collected in the region in which the transposition device is to be inserted. This collection is made in any suitable manner, as by the use of a come-along. Without disturbing the assembly organization of the device, it is then placed between the slackened wires, and by manipulation of ther wires and the device one of the conductors A is caused laterally to enter the clear space between the insulators of one diagonal pair to bear against the outer surface region of both insulators of that pair, so that the slack in the wire is used to form a diagonal reach a extended in contact with the outer surface regions of the insulators. Similarly the slack of the other conductor wire B is caused to bear against the outer surfaces of the insulators of the other diagonal pair, being extended between them in a diagonal reach b.

After being mounted in such manner, each transposition device may be adjusted along the wires to correct any slight lack of uniformity of the reaches of wires which it defines with the reaches between other points of transposition and resistance balancing established by other similar devices. When mounted the transposition device is held securely by the additional tensioning of the wires caused by the deflection incident to their transposition.

It will be noted that the installation of my transposition device involves neither cutting the wires, nor a disassernbiing and reassembling of the device to place it in proper position with respect to the wires. Cutting and splicing long continuous lengths of wireA is well known to be undesirable. In the eld, and in an operation like the operation of mounting a series of transposition devices in accurately spaced., relation with the other along two conductor wires, the operation of reassembling the device on the wires is awkward and presents considerable difficulty. The transposition and resistance-balancing device of my invention thus presents substantial advantage over prior devices, such as the transposition device disclosed n United States Patent No. '110,206 to OBrien et al.. in which insulators are so engaged between two frame elements that it is necessary either to cut the wires or disassemble the devices in order to install them.

It is apparent that, although the base plate of my device, from which the insulators oppositely project, is shown as itself of rectangular form and as having" an open center, that detail structure is not essential to a desirable embodiment of my invention. Many other changes in form and arrangement may be made Within the bounds of my invention as defined by the appended claims.

I claim as my invention:

1. A position-transposing and balancing device In installation the for paired wires comprising a base, pairs of spaced insulators mounted on opposite sides of the base in approximately rectangular arrangement, the said pairs of insulators on each side of the base respectivehr being located at diagonally opposed angles of the approximately rectangle formed by their arrangement cooperatively to receive by lateral insertion a continuous strung conductor wire trained thereon.

2. A position-transposing and balancing device for paired wires comprising a, base, pairs of insulators mounted on opposite sides of the base, the insulators of each of the said pairs being located at the different diagonally opposed angles of an approximate rectangle, and braces for the said insulators extended therefrom to connection with the base, the said braces being arranged to provide clear space diagonally extended between opposite outer surfaces of the respective insulators upon each side of the base for lateral insertion of continuous wires trained around the said opposite sides of the pairs of insulators.

3. A position-transposing and balancing device for paired wires comprising a base, pairs of spaced insulators mounted on opposite sides of the base and projecting therefrqm, the said pairs of insulators being located at the different diagonally opposed angles of an approximate rectangle formed by the arrangement of the said insulators for reception by lateral insertion of diagonally crossed continuous strung 4wires contacting the outer surfaces of the insulators of the respective pairs.

4. A position-transposing and balancing device for paired wires comprising a base, pairs of spool-form insulators mounted on opposite sides of the base and projecting therefrom, the said pairs of insulators being located at the different diagonally opposed angles of an approximate rectangle formed by the arrangement of the said insulators, and bracing straps extended from the free ends of the insulators to connection with the baseI the braces for the two cooperative insulators on each side of the base being extended in directions to oppose the thrust of wires upon the respective insulators by wires trained around their opposite outer side and extended between them diagonally of the approximate rectangle formed by the arrangement of the said insulators.

lators against the thrust of wires bearing thereagainst.

B OGERS CASE.