. The Street railway journal . hp, and the General Electric 69,of 200 hp, such as construction of bearings for oil lubrication,ventilation and gear case suspension, have been chiefly confinedto motors of large capacity, but in the General Electric 74-motor these advantages are embodied in the split frame con-struction and in the smaller sizes. The axle-bearing liningsare supported within axle caps, bolted to vertical planed sur- 1 September 5, 1903.] faces in the lower frame. The axle caps are also cored forlarge oil wells and oil waste lubrication. The provisions for ventilation and the easy
. The Street railway journal . hp, and the General Electric 69,of 200 hp, such as construction of bearings for oil lubrication,ventilation and gear case suspension, have been chiefly confinedto motors of large capacity, but in the General Electric 74-motor these advantages are embodied in the split frame con-struction and in the smaller sizes. The axle-bearing liningsare supported within axle caps, bolted to vertical planed sur- 1 September 5, 1903.] faces in the lower frame. The axle caps are also cored forlarge oil wells and oil waste lubrication. The provisions for ventilation and the easy inspection of theinterior of the motor are quite complete. Besides the openingover the commutator the frame is provided with liberal open-ings at the top and bottom of each end of the motor. Theseopenings are closed by malleable iron covers, which may beremoved to secure perfect ventilation and circulation of airwithin the motor whenever the service conditions will reduce to a minimum the tendency to flash all short-. MOTOR, OPEN circuiting devices around the pole pieces have been carefullyavoided. In general, the details of electrical and mechanical construc-tion follow the well-known practices of the General ElectricCompany, but with some added improvements which have beenthought desirable. Among these improvements is the moreliberal surface given the armature bearings and the gears. Incomparison with the General Electric 57, which is slightlysmaller, the General Electric 74 has a pinion-end armaturebearing 3^ ins. in diameter by 8^4 ins. long, as against 3>4ins. x 8% his. The commutator-end bearing is 3^ ins. in
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
