. The Street railway journal . SECTION OF PNEUMATIC UNIT SWITCH. PUMP GOVERNOR INSTALLED UNDER ONE OF THE CROSS SEATS full multiple position. If by reason of a grounded armature orfor any other cause an abnormal current flows through the limit switch is connected in the circuit of No. imotor and when the current through it exceedsa predetermined amount, contact between wires8 and L is broken. As previously traced, cur-rent through L operates the unit switches, cut-ting out the resistance. When the circuit is brok-en the progressive lifting of these switches isstopped until the current decrease
. The Street railway journal . SECTION OF PNEUMATIC UNIT SWITCH. PUMP GOVERNOR INSTALLED UNDER ONE OF THE CROSS SEATS full multiple position. If by reason of a grounded armature orfor any other cause an abnormal current flows through the limit switch is connected in the circuit of No. imotor and when the current through it exceedsa predetermined amount, contact between wires8 and L is broken. As previously traced, cur-rent through L operates the unit switches, cut-ting out the resistance. When the circuit is brok-en the progressive lifting of these switches isstopped until the current decreases and the limitswitch drops. Those resistance switches thathave already lifted, however, do not drop, asthey are retained by current through wire 13. The batteries operating the controller arehoused in a box under the car. Two sets ofseven cells each are employed. The double-poledouble-throw battery switches are mounted ona board under a seat in the interior of the both switches are thrown in one direc-tion, one set is connected to the control system,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
