. American engineer and railroad journal . arc shownin Fig. 2. The contact making apparatus is insulated from theengine frame. In the engine cab. Fig. 3, on the left, is a visible indication,and on the right a bell and switch. Below the bell by the sideof the reverse lever is a battery box. An enlarged view of theindicator is given in Fig. 4. The miniature arm gives two in-dications—danger and clear. The route indicator below showswhether, at a junction, the road is set to the left or right atplaces other than junctions the indicator inclines to the left andis deflected for every signal. The o
. American engineer and railroad journal . arc shownin Fig. 2. The contact making apparatus is insulated from theengine frame. In the engine cab. Fig. 3, on the left, is a visible indication,and on the right a bell and switch. Below the bell by the sideof the reverse lever is a battery box. An enlarged view of theindicator is given in Fig. 4. The miniature arm gives two in-dications—danger and clear. The route indicator below showswhether, at a junction, the road is set to the left or right atplaces other than junctions the indicator inclines to the left andis deflected for every signal. The operation of the system is as follows: The first bar 468 Ueckmukk, AAiKRlCAN AND RAlLRi )AJ) JOURNAL 469 passed over sets the engine apparatus, raises the bar and startsthe bell ringing, whether the line be clear or not. In 150 yardsor so the second bar is reached. While traveling over this barthe bell ceases, bnt slionld the line not be clear the bell startsagain as soon as the shoe is ofT tlic bar. It, howcvc-r, the sig-. FIG. 3. nals are clear the bell does not resume and the miniature armfalls to the safety or proceed position, and the route indicator isdeflected. Should, however, the signals still be in the dangerposition, the engineer would continue slowly on his way, thebell ringing all the while, until he got to the home signal. Hewould know his position by the bell ceasing when on the bar atthe signal, and if the miniature arm still remained at dangerhe would come to a stop, taking care that his engine was onthe bar. Should he overrun the latter the bell would start again,and would not stop until he backed up. If, however, the homeand starting signals had meanwhile been lowered the bell wouldnot only cease ringing at the home signal bar, but the ministurearm would go to the safety position and the indicator be de-flected. Another condition is. of course, possible, which is that thetrain may be delayed waiting for the section ahead to he so, t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
