Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 21
ce forStraight-Line Movement 8 STEAM ENGINE INDICATORS and the guide roller is so placed on the pencil bar that the curve ofthe guide slot controls the pencil motion and absolutely compen-sates for the tendency of the pencil to move in a curve. Thereis a minimum of friction in this movement and… … Fig. 7. American Thompson Indicator other indicators, but a close comparison will show some differencein the details of construction. For.instance, it is evident that thearrangement of the levers, which make up the pencil motion, differslightly from that of the Crosby indicator. Each maker, of…
Indicators for steam-engines · Steam-engines
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