. Electric railway journal . o 1 for short wheel-basetrucks with outside hungmotors. 8. A 12 to 1 maximum total leverage is permissible whenbrake shoes are hung not more than 2 in. below the centerof the wheel. If brake shoes are hung lower than this itwill be necessary to reduce the maximum total leverageaccordingly, and if brake shoes are hung 5 in, or 6 in. belowthe center of the wheel a total leverage of 10 to 1 shouldbe the limit. 9. The standard M. C. B. recommendations for maximumstress in levers, rods and pins to be adopted as follows: (a) Maximum stress in levers—23,000 lb. per square
. Electric railway journal . o 1 for short wheel-basetrucks with outside hungmotors. 8. A 12 to 1 maximum total leverage is permissible whenbrake shoes are hung not more than 2 in. below the centerof the wheel. If brake shoes are hung lower than this itwill be necessary to reduce the maximum total leverageaccordingly, and if brake shoes are hung 5 in, or 6 in. belowthe center of the wheel a total leverage of 10 to 1 shouldbe the limit. 9. The standard M. C. B. recommendations for maximumstress in levers, rods and pins to be adopted as follows: (a) Maximum stress in levers—23,000 lb. per square inch. (b) Maximum stress in rods, except jaws—15,000 lb. per square inch, no rod to be less than % in. indiameter. (c) Maximum stress in jaws to be 10,000 lb. per square inch. (d) Maximum shear on pins—10,000 lb. per square inch single shear. (e) Diameter of pins to provide a bearing value not to exceed 13,000 lb. per square inch of projectedarea. 10. Safety valve adjustment to be 10 lb. above maximumgovernor Fig. 1—Location of ConnectorReceptacles *Presented at the June meeting of the Central Electric RailwayAssociation. St. Joseph, Mich., June 22, 1911. 32 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVIII, No. r. SIZEor CYL M N 8*12 58 2i 10x12 I Z5 12x12 J8 22 nM a 4 3 16x12 J4 3~
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