. Electric railway journal . pset [run 4 1 ILihLer Lolt J4. 2 4 Jjx u,„i [,„, 12-;,:ii I: m Shoo Head Bolt 3a « 4 ■ Rel. Spring Short if W 1 EE Cotter Brake llanner T Bolt X 2 4 FF » Dead Lever E e Fin VlS X 1J4 1 Brake Lever Bolts 3 10 X 1^ Fig. 7—Truck and Car Alterations—Brake Rigging trucks. The average weight of these cars is 35,200 lb.(empty). It will be noted from the table that with a brake Electric Ry. Journal Assembly of the Peckham No. 25 Passenger Truck in the size and a change in the design of the brake hangerT-bolt. These alterations were made because of break- M rfuce K! va
. Electric railway journal . pset [run 4 1 ILihLer Lolt J4. 2 4 Jjx u,„i [,„, 12-;,:ii I: m Shoo Head Bolt 3a « 4 ■ Rel. Spring Short if W 1 EE Cotter Brake llanner T Bolt X 2 4 FF » Dead Lever E e Fin VlS X 1J4 1 Brake Lever Bolts 3 10 X 1^ Fig. 7—Truck and Car Alterations—Brake Rigging trucks. The average weight of these cars is 35,200 lb.(empty). It will be noted from the table that with a brake Electric Ry. Journal Assembly of the Peckham No. 25 Passenger Truck in the size and a change in the design of the brake hangerT-bolt. These alterations were made because of break- M rfuce K! vatuii 11 1 1 1 1 H — ! 1 ! ! 1 i in r—I 1 1 1 1 ! SECTION A-A fa 3 1 g*, O A Q •? fa S 1907 1908 1909 Electric Ry. Jui-rnal. Fig. 9—Truck and Car Alterations—Brake Shoe Costs-Per1000 Ton-Miles handle pressure of 59 lb. the pressure on the brake shoesequals 90 per cent of the weight of the car. The highesttensile stress in the brake rigging is 21,790 lb. per sq. in. Fig. 10.—Truck and Car Alterations—Vestibule for DoubleTruck Surface Cars ages of the old T-bolts, which caused the brake rigging todrop in the street. The T-bolt was increased from 1 in. toi}i in. It was strengthened by enlarging the bolt at the July io, 1909.] ELECTRIC RAILWAY JOURNAL. 67 point where it was fastened to the head and eliminatingthe square corners at the intersection of the head and head is also made oblong in shape, ij4 in- x 1V& m->instead of 1 in. round as before, thus allowing additionalwear. Changes similar to the foregoing are being madeon the Taylor hangers, also used on the elevated line, i The brake beams originally furnished with the PeckhamNo. 25 trucks were too weak and first gave trouble bybrea
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