. Locomotive engineering : a practical journal of railway motive power and rolling stock . nt. Notrouble at all was experienced with or onaccount of the novel patch. LOCOMOTIVE ENGINEERING. 157 Early Engineering Appliances. We reproduce from the Practical Me-chanics and Engineers Magazine, Glas-gow, 1842, a steam-engine indicator andan oil-testing machine, designed by These devices bring us to arealization of the fact that we of to-daycannot lay claim to everything in sight inthe way of original engineering thought,and they are interesting when comparedwith our present methods of
. Locomotive engineering : a practical journal of railway motive power and rolling stock . nt. Notrouble at all was experienced with or onaccount of the novel patch. LOCOMOTIVE ENGINEERING. 157 Early Engineering Appliances. We reproduce from the Practical Me-chanics and Engineers Magazine, Glas-gow, 1842, a steam-engine indicator andan oil-testing machine, designed by These devices bring us to arealization of the fact that we of to-daycannot lay claim to everything in sight inthe way of original engineering thought,and they are interesting when comparedwith our present methods of reaching thesame results. The indicator, it will be seen by thescale attached to the cylinder, was made toregister low pressures; it is not so greatlydifferent from the later indicators, exceptin the absence of a multiplying and parallelmotion for the mechanism actuating thepencil. The other essentials are there,crude maybe; but they made a start in thedevelopment of the steam-engine indicator,rough as they were. We quote from the magazine referred to,the description of the oil-tester:. when in 1 again 1 the mn «ill 1 ome in contact with the pin /, and endeavor tocarry it forward toward thi StOside next the cramp. The stops are toprevent its being carried too far out of theperpendicular. /( is a sliding weight. 1>ing kept steady in any situation by a smallspring. ( is the center upon which thelever turns, being supported in the upperpart of the brass frame; the lever is di-vided into 150 equal parts. B is a coun-terweight. When the mark upon thecounterweight corresponds with 0, thegraduated lee, ol the lever will be hori-zontal; and the leg P will be perpendicu-lar, plunging freely between the stopswithout touching either of them, and isthen in equilibrium. V is a pulley with nd at 30, the other at 60; thenthe medium is 40. This will be the casetures have been equal; however, itwill be sufficiently near to show thioil cannot be mixed with good withoutbeing detected. As oils
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Keywords: ., bookcentury1800, bookdecade1890, bookidlocomotiveen, bookyear1892
