. Electric railway journal . FIVE-PIECE C A T E •NARY HANGER May 5, 1917] ELECTRIC RAILWAY JOURNAL 837 New Contact Spring for Trolley Harps The accompanying illustration shows the Kalamazootrolley harp and the new design of springs with whichthey are being equipped by the makers, the Star BrassWorks, Kalamazoo, Mich. Since the springs are not. CONTACT SPRING FOR TROLLEY HARPS riveted to the harp, renewals can be readily made with-out removing the pole from the car. The contact sur-faces are large, thus giving a good current capacity andadding to the life of the pins and bushings. Oxy-Acetylene
. Electric railway journal . FIVE-PIECE C A T E •NARY HANGER May 5, 1917] ELECTRIC RAILWAY JOURNAL 837 New Contact Spring for Trolley Harps The accompanying illustration shows the Kalamazootrolley harp and the new design of springs with whichthey are being equipped by the makers, the Star BrassWorks, Kalamazoo, Mich. Since the springs are not. CONTACT SPRING FOR TROLLEY HARPS riveted to the harp, renewals can be readily made with-out removing the pole from the car. The contact sur-faces are large, thus giving a good current capacity andadding to the life of the pins and bushings. Oxy-Acetylene Welding Practice inDes Moines Shop Different uses to which oxy-acetylene gas can be putin an electric railway shop are constantly being dis-covered by M. M. Lloyd, master mechanic Des Moines(Iowa) City Railway. On the new low-floor cars inDes Moines the gear cases have a clearance of only2 11/16 in., and hence they often strike a stone orother obstruction on the roadway. This may make adent in the case, and then the gear teeth cut a accompanying illustration shows a gear case withsuch a hole in it and one in which a similar hole hasbeen quickly and easily repaired by welding a patchover the hole. Worn center bearings on Westinghouse D2EG andD3EG air compressors are built up by the weldingprocess. The babbitt is first taken ou
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