. The Street railway journal . vice on high-tension transmission systems and whereverprotection was desired within its range. The new type has thesame dimensions as the old type-C arrester, style No. 1383,and the arrester unit itself may be used as a repair part wher-ever this device has been employed. One improvement is themethod of securing the non-arcing cylinders to the porcelainsupports. These are firmly held in place by machine screwspassing through holes in the porcelain supports and screwed 890 STREET RAILWAY JOURNAL. [Vol. XXV. No. 19. in the line and ground contacts. Porcelain suppor
. The Street railway journal . vice on high-tension transmission systems and whereverprotection was desired within its range. The new type has thesame dimensions as the old type-C arrester, style No. 1383,and the arrester unit itself may be used as a repair part wher-ever this device has been employed. One improvement is themethod of securing the non-arcing cylinders to the porcelainsupports. These are firmly held in place by machine screwspassing through holes in the porcelain supports and screwed 890 STREET RAILWAY JOURNAL. [Vol. XXV. No. 19. in the line and ground contacts. Porcelain supports are moldedto shape with the cylinder centers exactly spaced, thus secur-ing a perfect air-gap adjustment. All the cylinders can beeasily turned through any angle to present new surfaces foraction. Line and ground leads are made in a very securemanner. The assembled porcelain supports and cylinders are separatedfrom the iron box by rubber-covered wire. This makes aneffective packing, which insures the porcelain from breakage. LINE ARRESTER FUR OVERHEAD FEEDERS AND CIRCUITS if the arrester be shaken or jarred, and the wire holds the pack-ing in place. The cover is screwed to the box, rubber gasketskeeping out all rain. The arrester is of the line type, designedfor connection to overhead feeders and circuits, the normalrating being from 500 volts to 1250 volts double pole and upto 2500 volts single pole. All the best electrical operating char-acteristics of the old type-C arrester are retained, the improve-ments consisting of improved mechanical construction, andconsequently longer life and ease of inspection and repair. ♦♦♦ THIRD-RAIL GUARD PATENTS Patents have recently been issued to L. B. Stillwell andF. R. Slater, of the electrical department of the InterboroughCompany, New York, for the invention of the type of third-railguard which is used in the New York Subway. The patentsare two in number, one referring to the arrangement of pro-tecting covering which is supporte
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
