Telephone; a manual of the design, construction, and operation of telephone exchanges .. by Abbott Arthur Vaughan 1854-1906

Author:Abbott, Arthur Vaughan, 1854-1906. [from old catalog]
Language: eng
Format: epub
Tags: Telephone, Telephone stations. [from old catalog]
Publisher: New York, McGraw publishing company
Published: 1903-03-25T05:00:00+00:00

TtJLlUPHONr,

SECTION 40.

Material Required.

Paper Sleeves,

of rolled paper, 3" long, J'' diameter, boiled in paraffine, one for each wire to be spliced.

Paraffine.

Best quality, of Standard Oil Company manufacture, free from moisture, acid, or any substance injurious to the cable; a sufficient quantity to fill a pot or pan in which the splice can be completely immersed.

Solder.

Fifty per cent tin, fifty per cent lead; enough to fill a solder pot.

Wickingr.

COTTON ; one large ball.

I#ead Sleeves.

Pure lead. One sleeve for each splice, sizes to be as per Table No. VI.

TABLE No. VI. Sizes of Lead Sleeves for Main Cable Splices.

Length. Diameteb. Thickness. Inches. Inches. Inches.

400 Pair Cable

360

300

250

200

150

120

100

50

30

25

16

10

40 38 36 34 32 30 28 28 28 26 25 24 20

X X X X X X X X X X X X X

4 4

n

I'

2|

^ 2

n

I'

1

X X X X X X X X X X X X X

i

i

A A A A A

While this table gives general dimensions for lead sleeves, they shall always be about |-inch larger than the sheaths of the cables to be spliced, from -^ to -^^ inch in thickness, and long enough to allow the splicing of all conductors without producing bunching sufficient to prevent the splice from entering the sleeve, and with sufficient lap to cover each cable sheath at least 1J inches.

SECTION 41. Operation.

Remove from 12 to 20 inches of each cable sheath, as shown in Fig. 43, bind the core at the end of each sheath tightly with wicking, packing the binding close to the end of each sheath, as shown, to prevent paraffine from following the core. Boil out each end by immersing it in melted paraffine, heated to from 225° to 250° F., till all bubbling ceases. Each end shall be immersed so that the cotton binding is thoroughly saturated with paraffine. Slip the lead sleeve over one cable, slip a paper sleeve over each wire in one cable, splice each wire of every pair in one cable to the correspondingly colored wire in a pair in the other cable, by stripping the paper from each wire for a distance of about one inch, and twisting the ends tightly together, as shown at B and (7, Fig. 43. After twisting bend the twist parallel with the wire, slip the paper sleeve over the twist as insulation as at 2>. Care shall be exercised not to nick or injure any wire in removing the paper. Each twist shall include about J-inch of paper-covered wire. No solder shall be used. The twisted wire joints shall be so distributed that the splice

shall be essentially uniform in diameter throughout its length. When all the wire joints are completed the splice shall be immersed in boiling paraffine for fifteen minutes, or until all bubbling ceases. The lead sleeve shall then be slipped over the splice, so that it may lap the lead of each cable sheath for 1\ to 2 inches. The ends of the sleeve shall then be dressed into close contact with the cable sheath and each end wiped to its respective cable sheath.

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