. Electric railway journal . 8 in., and maximumcenter-pin load, 27,000 lb. These trucks are used under cars which have a seat-ing capacity of fifty passengers, but in which 200 pas-sengers may at times be carried. The difficulties in pre-paring a design suitable for meeting these extremevariations in load were increased by the fact that an un-usually light truck was required. The Baldwin ClassL plate truck was selected to meet these is extremely light in proportion to its carrying capa-city. The side frame, end reinforcements, pedestals,pedestal ties and frame gusset are all form
. Electric railway journal . 8 in., and maximumcenter-pin load, 27,000 lb. These trucks are used under cars which have a seat-ing capacity of fifty passengers, but in which 200 pas-sengers may at times be carried. The difficulties in pre-paring a design suitable for meeting these extremevariations in load were increased by the fact that an un-usually light truck was required. The Baldwin ClassL plate truck was selected to meet these is extremely light in proportion to its carrying capa-city. The side frame, end reinforcements, pedestals,pedestal ties and frame gusset are all formed from asingle piece of flanged steel. The transoms and endframes consist of angle irons. While the resultingstructure is light it provides both horizontal and verticalstrength and rigidity. The motors are outside hung,with suspension bars supported by the end frames. This truck is of the pedestal type, and the frames aresupported by coiled springs which are mounted over theboxes. The pedestals have removable shoes against. Latest Motor Truck for San Francisco Municipal Railways which the boxes bear. The bolster is a steel casting andis carried at each end by a half-elliptic spring. Thespring hangers are allowed a limited amount of lateralswing. The brakes are inside hung, and the brake shoesare suspended from the transoms. Renewable chafingplates are applied to the bolster and transoms. The con-struction is simple throughout, and the truck can beeasily maintained in any shop with ordinary facilities. TESTS OF CAR COUPLERS AT THE UNIVERSITY OFILLINOIS A series of tests is being conducted by the Universityof Illinois for the Scullin-Gallagher Iron & Steel Com-pany of St. Louis, on a new style of car coupler. Thenew coupler eliminates the likelihood of fracture at theface by having a solid face and a new type of tailknuckle. A former test made by the university,showed that when failure of the new style coupler oc-curred, it was generally at the knuckle. After the firsttests, the
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