. The Street railway journal . rket. An Improved Self-Oiling Trolley Harp During the three years that the trolley harp shown in the accom-panying engraving has been on the market the manufacturers havemade many improvements in its construction. It is now one of themost efficient and durable of the self-oiling harps, and is so simplethat its operation is practically perfect. It is made in both brass andaluminum, the latter metal giving most satisfactory results and al-lowing the use of weaker springs than the heavier metal. As shown by the illustration, there are two chambers to receive Novembe
. The Street railway journal . rket. An Improved Self-Oiling Trolley Harp During the three years that the trolley harp shown in the accom-panying engraving has been on the market the manufacturers havemade many improvements in its construction. It is now one of themost efficient and durable of the self-oiling harps, and is so simplethat its operation is practically perfect. It is made in both brass andaluminum, the latter metal giving most satisfactory results and al-lowing the use of weaker springs than the heavier metal. As shown by the illustration, there are two chambers to receive November 3, 1900.] STREET RAILWAY JOURNAL. the oil, the one around the axle being much the smaller. The largerreservoir contains the supply of oil, which is fed to the auxiliaryreservoir every time the trolley is lowered. From there it flowsthrough the central passage that is bored in the axle or spindle onwhich the wheel revolves. A piece of felt in a slot on the axleprevents too free a flow and gives a good distribution of the SELF-OILING TROLLEY HARP There is sufficient oil placed in the harp at each filling to last fromten to thirty days. The long bearing of the trolley wheel gives a true and even run-ning, and thus reduces the wear. All the oil is used in lubrication,and the ordinary trolley oiler at the end of the road is dispensedwith. The wheel running smoothly and with perfect lubrication,there is much less noise than with ordinary wheels, and the deviceis less liable to leave the trolley wire. For this reason it has beenin use on some of the large heavy traffic, high-speed roads of thecountry with great success. The self-oiling trolley harp above described is known as theExcelsior, and is manufactured by the International SpecialtyCompany. Two Large Engines at the Paris Expositson Prominent in the British section of the foreign power house atthe Paris Exposition is the combined exhibit of Willans & Robinson,of Rugby, England, and Siemens Brothers & Co., of London. Thee
Size: 1917px × 1303px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
