. Operation of trains and station work and telegraphy . the Southern Pacific, de-signed a neat and compact disc signal suitable for thisparticular condition. The general arrangement of tracks and signals at eachof the staff stations is shown on Plate 19. All signalsin the horizontal position indicates take siding. Upperblade of two-arm signal clear and independent distantclear indicates stop at staff station/ staff not signals clear indicates proceed, staff ready and incrane. The circuits controlling the signals in the above de-scribed movements are clearly shown on Plates Nos. 20,21
. Operation of trains and station work and telegraphy . the Southern Pacific, de-signed a neat and compact disc signal suitable for thisparticular condition. The general arrangement of tracks and signals at eachof the staff stations is shown on Plate 19. All signalsin the horizontal position indicates take siding. Upperblade of two-arm signal clear and independent distantclear indicates stop at staff station/ staff not signals clear indicates proceed, staff ready and incrane. The circuits controlling the signals in the above de-scribed movements are clearly shown on Plates Nos. 20,21 and 22. On Plate 20 B has staff circuits closed, re-leasing a staff at both A and C. Upon the arrivalof these trains at B/ the one from A will take thesiding and the one from C the main track, the latterstopping at the staff station (see Plate 21). If the trainfrom A should get into siding at B in time to enableoperator to put the staff into the instrument and get an-other released and put in the crane, the signals for the STATION AND TRAIN WORK 417. / <fc ^ t ^ SECTION OF HEAD SHOWING CIRCUIT CONTROLLER FIG. 132. CRANE STAFF DELIVERER. 418 RULES FOR MOVEMENT OF TRAINS train from C could be cleared as shown on Plate 22,thus preventing its stopping. The home and independent distant signals can becleared at any time by moving the handle of the circuitcontroller attachment from the normal or first position tothe middle or second position, allowing trains to approachthe staff station, but the staff distant signal on the twoarm post cannot be cleared until the circuit controllerattachment has been released by a staff, when the han-dle can be removed from the middle or second positionto the reverse or third position, thereby closing one pointin the circuit of the aforesaid staff distant signal, theother point in the circuit being closed by putting the staffin the crane ready for the train to take as it passes. Two opposing signals cannot be given at the same time,circuits of each
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadtrains, booky
