. Electric railway journal . TUNNEL WTith outriggers in hoist, 240,000 lb. at 17-ft. radius. 160,000 lb. at 20-ft. radius. With end outriggers onlyMain hoist, 140,000 lb. at 16-ft. hoist, 30,000 lb. at 25-ft. radius. Without outriggersMain hoist at right angles, 44,000 lb. at 16-ft. radius. 32,000 lb. at 20-ft. radius. Auxiliary hoist, 24,000 lb. at 25-ft. radius. Trolley Frogs for One Degree of Angle An addition to trolley frogs designed in only one de-gree of angle regardless of the degree of track curva-ture, necessitating the carrying of only one right-handan
. Electric railway journal . TUNNEL WTith outriggers in hoist, 240,000 lb. at 17-ft. radius. 160,000 lb. at 20-ft. radius. With end outriggers onlyMain hoist, 140,000 lb. at 16-ft. hoist, 30,000 lb. at 25-ft. radius. Without outriggersMain hoist at right angles, 44,000 lb. at 16-ft. radius. 32,000 lb. at 20-ft. radius. Auxiliary hoist, 24,000 lb. at 25-ft. radius. Trolley Frogs for One Degree of Angle An addition to trolley frogs designed in only one de-gree of angle regardless of the degree of track curva-ture, necessitating the carrying of only one right-handand one left-hand style, is the Westinghouse type is a trolley frog without movable parts that can beused at points where high speeds are obtained, the de-sign being such that the trolley wheel does not travelon its flanges. Therefore no bump, and consequent dis-placement, occurs when the bearing of the wheel istransferred from the groove to the flange. The typeBR is asserted to be the only trolley frog that will pre-. FROG DESIGNED FOR 15 DEG. ANGLE vent a wheel from traveling on its flanges without usingmechanical or electrical devices in connection with amovable tongue. The illustrations show this frog fora 15 deg. angle designed for city service, though thecompany is prepared to furnish this type of frog ineither an 8 deg. or 10 deg. angle for high-speed inter-urban service. The malleable iron frog has recently become popularon account of its long life as compared with the bronzefrog, although a great many operating men prefer thelatter on account of the longer life obtained from thetrolley wheels. This argument does not apply to thepresent malleable iron frog, as the resistance to thepassage of the trolley wheel is asserted to be less thanwith any design of bronze frog. This type can be placed almost directly over the trackswitch point, preventing the side wear of the wirecaused by the angular riding of the wheel before itenters the frog. When the frog is placed in i
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