. Electric railway journal . twenty-five-cycle motors and unitswitch control. These locomotives each weigh 80 tonsand are able to exert a maximum tractive effort of DIFFERENTIAL STAFFLESS BRAKE FOR LOW-PLAT-FORM AND OTHER CARS The tendency toward more compact and lighter plat-form equipment is demonstrated anew by the differen-tial staffless brake which has just been brought out bythe Lord Manufacturing Company, Brooklyn, N. Y. Inaddition, this brake exerts powerful leverage with lit-tle effort so that it is available equally for the regularbraking of heavy cars and for the contingency braking
. Electric railway journal . twenty-five-cycle motors and unitswitch control. These locomotives each weigh 80 tonsand are able to exert a maximum tractive effort of DIFFERENTIAL STAFFLESS BRAKE FOR LOW-PLAT-FORM AND OTHER CARS The tendency toward more compact and lighter plat-form equipment is demonstrated anew by the differen-tial staffless brake which has just been brought out bythe Lord Manufacturing Company, Brooklyn, N. Y. Inaddition, this brake exerts powerful leverage with lit-tle effort so that it is available equally for the regularbraking of heavy cars and for the contingency brakingof air-brake cars. Besides its extreme compactness above and belowthe platform, as indicated by the dimensions on theaccompanying drawings, this brake has the advantageof a direct drive on the shaft of the brake wheel forthe application of power to the differentials. Theprinciple involved is that which has been successfullyutilized for years in connection with hoisting ma-chinery. It will readily be seen by reference to the. General Views and Drawings of Differential Type Staffless Brake 40,000 lb. with a clean dry rail. The following itemsas to hauling capacity may be of interest. The figures given for straight level track show theload which may be handled in infrequent switchingservice. The switching locomotives are guaranteed toexert a maximum tractive effort of 36,000 lb. for aboutthree minutes at speeds up to 6 and a continu-ous tractive effort of 14,800 lb. at a speed of IIV2 Rated Hauling Capacity* Number of Cars Each MaximumTrack Profile Weighing 45 Tons with Load Speed, Straight level track 67 y2 per cent grade 28 1 per cent grade 17 2 per cent grade 9 ♦On the average load, the load that can be handled is determinedby the maximum grade. In practice it has been found that an electricswitching locomotive can do the work of two steamlocomotives because it can be run day and night. It isnot expected that the maximum voltage on the mot
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