. American engineer . Blowers in Gas House. pyrometer. This step is in accordance with the suggestionsmade at the New York Railroad Club at the November meetmg,though the action was taken before the suggestions were is expected that the heating and cooling of the tool steel inaccordance with pyrometric indications will make it possible toentirely avoid all cracks in tnols because of faulty Iiardcning andtempering. The use of gas in the foundry core ovens is also satisfactory and results in somewliat more rapid drying tlian where coal wasused. For example the time required to dry a cyli
. American engineer . Blowers in Gas House. pyrometer. This step is in accordance with the suggestionsmade at the New York Railroad Club at the November meetmg,though the action was taken before the suggestions were is expected that the heating and cooling of the tool steel inaccordance with pyrometric indications will make it possible toentirely avoid all cracks in tnols because of faulty Iiardcning andtempering. The use of gas in the foundry core ovens is also satisfactory and results in somewliat more rapid drying tlian where coal wasused. For example the time required to dry a cylinder corewith coal was usually about 14 hours. With gas the work isalways done in 12 hours and has been done in 6 hours. Theaverage time required for the general run of cores was 6 hoursfor coal, while it is about 4>4 hours with gas, and that too with-out parching or drying so hastily as to cause the cores to Dry Scrubber. In the melting of brass there is but little difference betweenthe use of coal and gas with the present arrangements. Tests have been made to determine the gas consumption of theseveral furnaces when working to full capacity, and this is aboutas follows: Brass tilting furnace with 2 1,980 cu. ft. per hour Brass pit furnace with 2 burners 2,040 cu. ft. per hour Core oven with drawers (1 burner).... cu. ft. per hour Large core ovens (1 burner) cu. ft. per hour Large 6-burner heating furnaces 15,000 cu. ft. per hour Heating furnaces with 2 burners 2,400 cu. ft. per hour Miscellaneous furnaces with 2 4,020 cu. ft. per hour Case hardening furnace with 2 burners. 3,600 cu. ft. per hour From the evidence at hand it appears then that the use of gason this scale in the blacksmith shop and for niiscel-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
