. Electric railway journal . s operating in part as a repulsion motor,giving it good starting characteristics. This repulsion,or inverse connection, is used up to 15 and it per-mits an acceleration of the rate of onlevel track. From this point on to the full-voltage April 27, 1918 Electric Railway Journal 801 series, or doubly-fed, connection the acceleration s. Full speed is approximately 60 level track. In the earlier cars the air compressor and the blowerfor cooling motors, transformers and preventive coilswere driven from the same motors. In th
. Electric railway journal . s operating in part as a repulsion motor,giving it good starting characteristics. This repulsion,or inverse connection, is used up to 15 and it per-mits an acceleration of the rate of onlevel track. From this point on to the full-voltage April 27, 1918 Electric Railway Journal 801 series, or doubly-fed, connection the acceleration s. Full speed is approximately 60 level track. In the earlier cars the air compressor and the blowerfor cooling motors, transformers and preventive coilswere driven from the same motors. In the new carsthe drives are separate. The blower, which has a ca- ing effect of wind blowing across the track, connect thetwo messengers. The contact wire is hung from thesecondary messenger by means of bronze clamps. The messenger wire is supported on insulators fromoverhead structures of several types, depending uponthe characteristics of the respective parts of the , bracket, or special lattice-truss cross. CHESTNUT HILL, YARD SHOWING LATTICED POLES CHESTNUT HILL YARD AND MAIN TRACK LOOKING SUPPORTING CATENARY STRUCTURE TOWARD NORTH PHILADELPHIA pacity of 6000 of air per minute at 5i in. staticpressure, is driven by a 7 A-hp. motor. The compres-sor, which has a capacity of 25 per minuteagainst 100 lb. air pressure, is driven by a In connection with the control equipment, for the pur-pose of simplifying the interlock circuits which pre-vent the possibility of damage through incorrect oper-ation of switches, a drum-type interlocking switch isused rather than separate interlocks on operates in a manner similar to the standard PKcontrol and greatlv simplifies the unit-switch con-struction. These interlock circuits do not appear in thesimplified general wiring diagram printed below. All ofthe control apparatus is placed around the edge of thecar for case of inspection and maintenance. Practically no change supports are us
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