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Show A NEW INSULATOR PIN. M One Recently Devised Which Haa H Many Advantages Over the H In tho description of the trnnsmln- slnn line nnd third-rail system or tho H Long Island railroad, published in a H recent Issue, tho Scientific Amor lean mentioned a new typo of Iron H lusulntor pin employed. This pin, which Is n radical ileparturu from H previous practice In plu design, Is the Invention of Mr. W. N Smith, of Westlughouse, Church, Kerr & Co., H who has applied for n patent on tho H tlovlco. The new pin combines sev- oral Important advantages, as tol- H lows: It does away with thu ncccs slty or boring In the crossnrms, thoro- H by conserving the whole strength of the arm nnd lengthening Its life; tho metal composing It Is distributed in tho most cnVethu manner possible, H mS Its cross section Is greatest next to tho arm where the greatest resist- unco to bending Is required; nnd finally, tho shrinkage of thu arm ran H more effectively be tnken enro of by tho Uliolt and strap than any of tho other forms or pin fastening In com- nion use, ns there Is no tendency to distort the boll, nnd. consequently, ,H there Is no possibility of tho plu H standing crooked upon tho arm after thu shrinkage tins been taken up. i . f .'Mar"S-w 4i H Tilt: NUW INHULATOtt PIN, iiH Furthermore, It Is practically Indo- ' structlblo, nnd Instead of being ono or the weakest rectors In lino con- structlon, this pin is expected to bt H tho strongest. M More than 8,000 or tho pins, as H orlglnnlly designed and shown in thu M accompanying Illustration, wore usot M In tho transmission lino construction , H of thu Long Island railroad, carrying H 2S0.000 circular mil cables In Bpans M avnraulnir lf.ll feet In Iniu-ili mH aaaaafl no failures bnvu yot been reported ' H after over n year of scrvlco. A M dozen or more standard sizes of tho improved design are being worke.il up H to lit several sizes or rrossarms nnd H polo tops, and to carry Insulators ol M varying sizes up to thu highest .volt M ages lu practical use. Thu pins will H be mndo of wither cast or mnllcabla Iron to suit different conditions, and H will, It Is believed, fill a long foil H want for a plu which combines at H a reasonable cost the maximum ol M strength and durability Isith in Itsoll M and In the crossurm to which It is (.--av fastened. Whllo It la deslgnud par- feJ tlcularly for uso with wooden cross- B arms, It can readily bo adapted to M steel crossnrms, nnd to such special M fixtures as are often necessary In M heavy transmission lino construction M On account of Its superior mechnii' M leal design, It will also without doubt M find n place In heavy catenary trol M ley construction, which Is now being M actively developed for thu olectrlllra- M Hon of railways by tho slnglo phase M |