. The steam engine indicator and its appliances. Being a comprehensive treatise for the use of constructing, erecting and operating engineers, superintendents, master mechanics, and students ... with many illustrations, rules, tables, and examples for obtaining the best results in the economical operation of all classes of steam, gas and ammonia engines ... Its correct use, management and care, derived from the author's practical and professional experience .. . fir Fig. 112. cuum lines, and erect perpendiculars at the two extremes of the combination diagram, one of which is the clearance line
. The steam engine indicator and its appliances. Being a comprehensive treatise for the use of constructing, erecting and operating engineers, superintendents, master mechanics, and students ... with many illustrations, rules, tables, and examples for obtaining the best results in the economical operation of all classes of steam, gas and ammonia engines ... Its correct use, management and care, derived from the author's practical and professional experience .. . fir Fig. 112. cuum lines, and erect perpendiculars at the two extremes of the combination diagram, one of which is the clearance line. All measurements of distance should be made from the clearance line, and all measurements of pressure from the And Its Appliances. 23r atmospheric line. Now divide each original diagram into anydesired number of equal parts, 10 being a good number. Find the volume of the piston displacement of the lowpressure cylinder, to which add the volume of the clearance;the total length of the diagram represents this total volume. Divide the clearance by the total volume, and the quotientwill be the percentage this clearance bears to the whole length. Jj*JJjM frt-tiui-. Fig. 113. Set off this distance from the clearance line, and dividethe remainder (representing the piston displacement) into thesame number of parts that the original diagram is divided into. If the scale selected is the same as that of the original dia-gram, simply transfer the pressures directly with a pair of di-viders from the lines on the original diagram to the corres*-ponding lines on the combination ; then draw in the connecting 232 Steam Engine Indicator portions of the diagram, and the result will be an elongateddiagram from the low pressure cylinder or as if it had beentaken with the same spring as before, but with a proportion-ately enlarged paper drum. Now find the total volume of the high pressure cylinder,and divide it by the total volume of the low pressure cylinder,and the quotient is the percentage of l
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidsteamengineindic00houg
