. Electric railway review . thewire for»the days traffic. During heavy storms cars equippedwith wheels should be run every 15 or 20 minutes. By the useof these simple devices much delay and annoyance may beavoided. These scrapers and wheels are made by the R. Company, Pittsburg, Pa. The scrapers are made intwo sizes, 4-inch and 6-inch. The wheels are made 4 inches indiameter, 1% inches through hubs and 5% inches in diameter,1%, 2 and 3 inches through hubs. A NEW OHIO BRASS SECTION INSULATOR. A new type of section insulator has recently been put onthe market by the Ohio Brass Company
. Electric railway review . thewire for»the days traffic. During heavy storms cars equippedwith wheels should be run every 15 or 20 minutes. By the useof these simple devices much delay and annoyance may beavoided. These scrapers and wheels are made by the R. Company, Pittsburg, Pa. The scrapers are made intwo sizes, 4-inch and 6-inch. The wheels are made 4 inches indiameter, 1% inches through hubs and 5% inches in diameter,1%, 2 and 3 inches through hubs. A NEW OHIO BRASS SECTION INSULATOR. A new type of section insulator has recently been put onthe market by the Ohio Brass Company of Mansfield, O. It isshown in the accompanying illustrations. The device consistsof two substantial end castings of bronze, with means for at-tachment of the ends of the trolley wire, wood members form-ing the insulating medium between the sections. Great mechanical strength is obtained from the fact thatthe direct pull exerted by the trolley wires is borne by twowood break strain insulators, one on each side of the sus-. Section Insulator—Figure 1, Top View. pension bar and runner piece, as shown in Figure 1. Thesewood break strains are similar in construction to the OhioBrass Companys regular wood break strain insulator, that is,the malleable iron cap castings are compressed over the endsof the wood member by hydraulic pressure, which distributesthe stresses evenly throughout the entire piece. The malleable iron cap castings of the wood breaks areprovided with internally threaded lugs and are fastened to theend castings of the section insulator by machine bolts whichpass through holes in the end castings and engage the threadsin the lugs. Lock washers prevent these bolts from beingloosened by vibration. Since each of the wood breaks has an approximate ulti-mate strength in tension of 7,000 pounds it is possible to
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
