. American engineer and railroad journal . sion has already been cx-[ilaincd. On its upper edge the bar, S S, figs. 20 and ;, has an elon-gated notch, /, and a shorter notch,*. 3/is an electro mag-net located above the bar .< S. Below this magnet a vibrat-ing lever (; is jiivoted at r/ to a suitable support i. This levercarries an armature,/, which may be acted upon by the elec-tro-magnet M. Thelever fl also iiasa pendent latch, jr, pivot-ed to its outer end. This latch engages with the notches iand J whenever it is not held out of engagement therewith,either by the attraction of the m
. American engineer and railroad journal . sion has already been cx-[ilaincd. On its upper edge the bar, S S, figs. 20 and ;, has an elon-gated notch, /, and a shorter notch,*. 3/is an electro mag-net located above the bar .< S. Below this magnet a vibrat-ing lever (; is jiivoted at r/ to a suitable support i. This levercarries an armature,/, which may be acted upon by the elec-tro-magnet M. Thelever fl also iiasa pendent latch, jr, pivot-ed to its outer end. This latch engages with the notches iand J whenever it is not held out of engagement therewith,either by the attraction of the magnet acting on the armature,/, andthus raising the lever, or by being jwsitively hclil upby a catch k on the lower end of ;/. g depends from a T-sbapedlever,/( r,/17, which is jiivotally connected to a suitable sujiportat /, and iscounterbalanced by a weighty. The forwardly ex-tending arm h i of this lever is connected by a vertical rod,h h, with an arm n on the horizontal rock-shaft A Km the Vol. LXVII. No. 7.] AND RAILROAD JOURNAL. 323. upper part of the casing. This armis located at a iu flgs. 20 and 25, andis shown clearly in fig. 26. The shafthas an indicator plate li attached toits outer end. This indicator, and an-other on B, which will be referred topresently, occupy positions behindopenings 0 and 0 iu an opacjue plate,p p, iu the front of the casing. Theindicators may be seen through theseopenings, as shown in fig. 21, and theindicating words or symbols may beread when the operating mechanismhas been moved into the proper posi-tion to bring the indicating symbolsinto position. The plate ;/ p is cov-ered with a glass plate, (/, throughwhich the indicators may be seen. The shaft K K\% also provided witha counterweight, w, flgs. 20 and 26,to counterbalance the indicator plate,B, and thus leave the shaft K free tobe rocked by the movement of thelever h i j through the connecting-rodA h. The counterbalancing of thelever h i j and shaft K K is so ad-justed that the arm h i
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
