. The locomotive engineer . a lover from cab if desired; this eccentric has athrow equal to lap of valve, and fully controls can be applied lo any engine with case, and theonly objection which has yet been thrown at it isthat it 18 not desirable that t!ie lend may be inhands of the runner, that is, if lever from cab isused. Some of our oldest engineers say that thesame objection was made to link motions. Theremedy is simple. A gib fastening the movableblock in lower arm iif rocker will overcome this,and. besides, can be moved up so as to take up forlost motion, and always keep engine w
. The locomotive engineer . a lover from cab if desired; this eccentric has athrow equal to lap of valve, and fully controls can be applied lo any engine with case, and theonly objection which has yet been thrown at it isthat it 18 not desirable that t!ie lend may be inhands of the runner, that is, if lever from cab isused. Some of our oldest engineers say that thesame objection was made to link motions. Theremedy is simple. A gib fastening the movableblock in lower arm iif rocker will overcome this,and. besides, can be moved up so as to take up forlost motion, and always keep engine wiuare. evenafter long and hard wear. This valve gear is composed of two separatemotions, which can be operated independently ortogether. Fig. 1 shows valve gear in side eleva-tion, in full gear ahead; Fig. 2 shows front view ofcut-off shaft, 59, and arms 61 and 63; Fig, 8 showsside view of Fig. 2, making more plain slot 63 andblock C4 in arm 63; eccentrics arc sot as follows:Cut-off eccentric 56 is set with main pin 76, and. Now with the two motions working together itwill he seen that the radial center line of link ia atright angles, or nearly so, with the center line of ad-jusTablc lend or cut-off eccentric motion, and it willoperate engines with single valve, forward or back,in a more efficient manner than link motion as or-dinarily used, with the udvanlageit heretoforenamed; also a point in its favor, should eccentric,hook, or link, or any part of either motion bebroken on road, take off broken part or parts, andthe other motion will help the engine along, avoidlonp delays, and not making it nece*«ary to blockup or disconnect on broken side. This valve gear givesquicker opening and closingof ports, and a point of rest when open, and bsfpiare at all points of cut-off, forward or gear can be applied to any locomotive with-out any change, except the motion itself. H- L. Hoi,MES,Locomotive Engineer B. & A. R. R,Boston, MaM. [It is not our custom to show up untriod de
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1888
