. The Street railway journal . onnection with this instrument there is a device for test-ing commutators for open or short circuits. Its value can bereadily appreciated by electric railway men, as it is a well-known fact that many armatures have become burned out fromthe solder short-circuiting the bars in the back of the com-mutator or from copper being drawn across the mica whenthe commutator is being trued up in the lathe. THE LYNCHBURG TROLLEY EAR For the last eight months the Lynchburg (Va.) Traction &Light Company has been using, with very satisfactory results,the new type of trolley ear
. The Street railway journal . onnection with this instrument there is a device for test-ing commutators for open or short circuits. Its value can bereadily appreciated by electric railway men, as it is a well-known fact that many armatures have become burned out fromthe solder short-circuiting the bars in the back of the com-mutator or from copper being drawn across the mica whenthe commutator is being trued up in the lathe. THE LYNCHBURG TROLLEY EAR For the last eight months the Lynchburg (Va.) Traction &Light Company has been using, with very satisfactory results,the new type of trolley ear shown in the accompanying illustra-tion. This ear is adapted for both round and grooved wire,and can be employed with any of the hangers now in use. Thisdevice is the joint invention of S. H. Cochran and A. E. Ander-son, both of Lynchburg, Va. The cap of this ear is provided with a depending post havinga wedge-shaped slot cut through it near its lower end. Asshown in Fig. 2, the lower end of this post is cut away and pro-. FIGS. 1, 2 AND 3.—NEW TROLLEY EAR vided with a rounded shoulder, and the extreme lower end isalso cut away to provide a shoulder and a downwardly project-ing lip. The ear is substantially U-shaped in cross-section,and upon its lower face is straight from end to end, but theinner bottom face of the ear is convex, as indicated by thedotted lines in Fig 1. The ear is provided with an arm ex-tending upward and terminating in a tubular-shaped portion,which is provided with a beveled bearing face. The bottom ofthe bore of the tubular division is rounded to form the seatshown in the sectional view, Fig. 2. Both the tubular exten-sion and the post are furnished with slots arranged to coincideand permit the insertion of the key shown in Fig. 1. This keyis provided with a set of perforations, through any of whichthe key can be locked by the insertion of a cotter-pin. Fig. 2also shows a wedging piece formed in substantially the samearc as the convex face of the ear.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
