. The street railway review . carry the weight of the car without the aid of the equalizing liars, which are arranged in pairs, one each side oithe pedestals. To prevent the tilting of the top frame- the spring an ordinary Bourdon pressure gage mechansim with a special hand which makes contacts with the conducting stud at the position ofminimum pressure and allows current to flow through a magneticcoil which operates a plunger carrying contact pieces for the motorcircuit whereby the motor i-. started up. When the hand strikesthe maximum stud the current is reversed and the plunger pulledaway S
. The street railway review . carry the weight of the car without the aid of the equalizing liars, which are arranged in pairs, one each side oithe pedestals. To prevent the tilting of the top frame- the spring an ordinary Bourdon pressure gage mechansim with a special hand which makes contacts with the conducting stud at the position ofminimum pressure and allows current to flow through a magneticcoil which operates a plunger carrying contact pieces for the motorcircuit whereby the motor i-. started up. When the hand strikesthe maximum stud the current is reversed and the plunger pulledaway SO as to break the circuit and slop the motor. Ill,- cm- are operated with the General Electric type M controlsystem, which is adapted for running the cars separate or whentwo or more are coupled together in a train. When the car-, areoperated in a train the circuit connection- are so arranged thatthe motors on all of the cars may he controlled from either end ofany motor car. The type M system consists of two essentia] SIHE ELEVATION F PECKHAM M. C. H. 30 TRUCK. I the truck 1 springs each side of the journal l»\i- and supported from them by -addle-, [hesearry a sufficient portion of the load to prevent thetilting of the top frame-, the greater part of the load being carriedhy the equalizing bar -pring-. The side and end portions of the topframe are all in one piece, a forging. The transoms are bulb angles10 iii. deep, which extend full size with the side truss frame to which re very rigidly secured Gussets of sheet steel connect the the side frame- hold the frame- rigid and square. Thetruck- have Ieckliams patent -wing bolster; this i- constructed ofplates in form of a channel 10 in. deep and i- carried on four longcoil -pring- and one elliptic -pring which support the bolster froma- to hold it securely in a vertical transom and extending over tin bolsters pre-vent its being lifted out. The arrangement of bolster spring-, an elliptic in the cent i and name
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
