. Electric railway journal . 3-O-m—O-uv-j |6,b -L 1 ^HA^L_o_^!_o-(tt—O-UH I + ctb L—J j-o-Wr-L-OW—0~%^-0-%-x i * Itt Running Lw^J rQ_^L_Q_^._Q_^L-Q-^ Electric Pittsburgh Car—Diagram Showing Con-trol Connections 810 ELECTRIC RAILWAY JOURNAL [Vol. XLIII, No. motors, has been developed and patented by P. N. Jones,general manager Pittsburgh Railways. It operates byusing a permanent series connection between all of themotors in a four-motor equipment without the use ofany resistance. The operation is shown in the accompanying dia-gram. There are seven notches on the controller, ofwhi
. Electric railway journal . 3-O-m—O-uv-j |6,b -L 1 ^HA^L_o_^!_o-(tt—O-UH I + ctb L—J j-o-Wr-L-OW—0~%^-0-%-x i * Itt Running Lw^J rQ_^L_Q_^._Q_^L-Q-^ Electric Pittsburgh Car—Diagram Showing Con-trol Connections 810 ELECTRIC RAILWAY JOURNAL [Vol. XLIII, No. motors, has been developed and patented by P. N. Jones,general manager Pittsburgh Railways. It operates byusing a permanent series connection between all of themotors in a four-motor equipment without the use ofany resistance. The operation is shown in the accompanying dia-gram. There are seven notches on the controller, ofwhich three are running positions. On the first notchthe four motors are connected in series through a smallresistance which is used only to avoid the jar of start-ing when the gears and pinions are worn so that backlash exists between the teeth. The second notch ofthe controller leaves all motors in series, but cuts outthe resistance, and this is a running position. Theresistance remains cut out on all subsequent notches. The third controller notch connects two motors inseries, leaving the other two to run idle, thus givingan easy transition to the fourth controller notch inwhich the motors are connected in series-parallel. Thisis a running notch. In the fifth posi
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
