. American engineer . running order at a labor cost of Cvlinder head on 750 lb. steam hammer: this hammer was SEPrKMBER, 1913. RAILWAY AGE GAZETTE. MECHANICAL EDITION. 491 out of commission almiit 20 hours, and ihc lalmr cost was $ we not had the acetylene gas plant we would have hadto send each of these pieces to the factory, causing a delay offrom ]2 111 15 clays for each nuichino. CASE HARDENING George Massar (C, N. O. & T. P., Ludlow, Ky.) :—We havedouble deck furnaces especially designed for our spring workand case hardening. We use cast iron boxes and lids. Thepieces to b
. American engineer . running order at a labor cost of Cvlinder head on 750 lb. steam hammer: this hammer was SEPrKMBER, 1913. RAILWAY AGE GAZETTE. MECHANICAL EDITION. 491 out of commission almiit 20 hours, and ihc lalmr cost was $ we not had the acetylene gas plant we would have hadto send each of these pieces to the factory, causing a delay offrom ]2 111 15 clays for each nuichino. CASE HARDENING George Massar (C, N. O. & T. P., Ludlow, Ky.) :—We havedouble deck furnaces especially designed for our spring workand case hardening. We use cast iron boxes and lids. Thepieces to bo hardened are packed in one of these boxes of asuitable si/e. Pack the box carefully with the article to behardened, so as to allow enough potash when dissolved to coverthe work to be hardened. Cover the edges of the lid with fireclay to make the box as nearly airtight as possible. Allow thebox to remain in the furnace from eight to ten hours at degrees 1. Good results cannot be obtained with a heat.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
