. The practical telephone handbook and guide to the telephonic exchange . OiOOLOOOO HHOlMOt-OLOO1—< 1—1 CM ?H ■g -o 0 w © ri 2 0 1-3 ►3 CD02 -* JD -P I-5 O CO SB a g d .a CM ■or-|o J t^lOr-iO ~ o3 ft _J3 H |c« H M |d 0 02 CN O 4^ T3 CM CM tH -^ lO t- 00 CQ +2 02 0 .p •O lo lo lo IO m|iO •- n|o ~ c-IO H5 JH |w |e» |e» 02 CDftOCO Sh+302 c3 ® (X CM CM -* ^ O t- GO £ 1-1 02 50 d ft -J-= H3 lo „ |o lo lo 10 o £ H In |ph |d Is CD 60 0 S J2 02 CM CM CM CO CO O O t- O 02 ,§ H CD -d 10 lo 10 jo fe ftOCM 02 H P» H lis CD bC CM CM CO CO -* IO O O & 32 ■ss 7* 0 0 00 PI § OlM^-O^iOH io 0 00 0 i-i co 10
. The practical telephone handbook and guide to the telephonic exchange . OiOOLOOOO HHOlMOt-OLOO1—< 1—1 CM ?H ■g -o 0 w © ri 2 0 1-3 ►3 CD02 -* JD -P I-5 O CO SB a g d .a CM ■or-|o J t^lOr-iO ~ o3 ft _J3 H |c« H M |d 0 02 CN O 4^ T3 CM CM tH -^ lO t- 00 CQ +2 02 0 .p •O lo lo lo IO m|iO •- n|o ~ c-IO H5 JH |w |e» |e» 02 CDftOCO Sh+302 c3 ® (X CM CM -* ^ O t- GO £ 1-1 02 50 d ft -J-= H3 lo „ |o lo lo 10 o £ H In |ph |d Is CD 60 0 S J2 02 CM CM CM CO CO O O t- O 02 ,§ H CD -d 10 lo 10 jo fe ftOCM 02 H P» H lis CD bC CM CM CO CO -* IO O O & 32 ■ss 7* 0 0 00 PI § OlM^-O^iOH io 0 00 0 i-i co 10 K-S3 ,Lh ,Ih i^-l l^H HM So .^OfMOOHO E^ JpOOcMiOOiiOOl ^ ft -o 0 d cS £ft mh(M coirs i>0 1—1 362 PRACTICAL TELEPHONE HANDBOOK done by passing the suspender twice round the pole and thenclamping the end to the standing part by a special plate T~ Si Fig. 362.—Method of supporting Cable The span for lead-covered cables should seldom exceed 70yards, so as to keep the sag small, and thus prevent excessive swinging, which is injuri-ous to lead-covered it is necessary to havelonger spans than 70 yardsrubber-covered cableshould be used for the pur-pose, or the lead-coveredcable should be supportedon ridge-blocks fixedon intervening roofs. Sucha block is shown in 363.—Cable Sling. Scale \ The cable ig supportec} from the suspenders at every two feet by raw-hide slings, oneof which is shown in Fig. 363. The loop of the hide round the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttelephone, bookyear19
