. The Street railway journal . oove on the sec-ond drum is one-eighth inch less in circum-ference than the first groove on the firstdrum, and all other grooves are reducedsuccessively in the same ratio. Each pair make two or three wraps, then pass to thetension wheel, which is on a car, and tra-verses a track in the rear of the driving ma-chinery, then is carried out into the streetagain. With cables about four miles inlength, they give a movement to the ten-sion car of from four to five feet, makingfrom eight to ten feet of rope to be disposedof every few minutes, thus continually mov-ing the
. The Street railway journal . oove on the sec-ond drum is one-eighth inch less in circum-ference than the first groove on the firstdrum, and all other grooves are reducedsuccessively in the same ratio. Each pair make two or three wraps, then pass to thetension wheel, which is on a car, and tra-verses a track in the rear of the driving ma-chinery, then is carried out into the streetagain. With cables about four miles inlength, they give a movement to the ten-sion car of from four to five feet, makingfrom eight to ten feet of rope to be disposedof every few minutes, thus continually mov-ing the tension car back and forth. As the car with the wheel is quite heavy,its movement is not easily checked, and aquantity of rope is usually payed out andreceived into the building, which wouldnot be the case if car were properly gov-erned. This duplicate system has beenprovided with an automatic variable ten-sion, decreasing or increasiug the tensilestrain on the traction rope as the circum-stances may require. Cast Iron FIG, 2. for guiding the outer and lower rope (whenin use) down to its proper line after thegri}) has passed. These wheels are placedevery 4 feet on sharp curves of, say, 40 or50 feet radius, and at 8, 12 or 16 feet wherethere is less curvature. The cast-iron riser of the yoke supportsthe street from the central slot to the con-crete wall, a distance of 15inches from theinner rail. Cast brackets are placed im-mediately above the risers aforementioned,and support the cast-iron grating of thestreet, which extends the length of curve,presenting a uniform surface far superiorto the usual paving. MOTIVE POWER. Thebuildiugcontainmgthe motive powerof the Tenth avenue cable road is situatedon the east side of Tenth avenue, having afrontage of one block (200 feet). Theplant consists of two twenty-eight by forty-eight Wright engines, arranged to be oper-ated together or independently, as may be of driving drums has an independent trainof driving gears, and in the c
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
