. Operation of trains and station work and telegraphy . faiO STATION WORK Al^D TELEtiRAPHY 593 The clock mechanism at each way station is equippedwith a small commutator having two contacts locateddiametrically opposite for the twenty-eight station system,while one contact only is required for the fifty-six stationsystem. This commutator revolves as the second hand of. Fig. 16. a clock and as it brings the contact point under the brusha circuit is completed through a reJay, provided the dis-patcher has operated the key associated with this par-ticular station. This relay is so wired that when
. Operation of trains and station work and telegraphy . faiO STATION WORK Al^D TELEtiRAPHY 593 The clock mechanism at each way station is equippedwith a small commutator having two contacts locateddiametrically opposite for the twenty-eight station system,while one contact only is required for the fifty-six stationsystem. This commutator revolves as the second hand of. Fig. 16. a clock and as it brings the contact point under the brusha circuit is completed through a reJay, provided the dis-patcher has operated the key associated with this par-ticular station. This relay is so wired that when onceenergized it remains in the operated position until re-leased by the station agent in charge. The operation of 594 TELEPHONES IN RAILROAD WORK
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1919
