. Locomotive engineering : a practical journal of railway motive power and rolling stock . ranged, by which it is madeimpossible to turn the levers that clearany two routes that may lead to a locking is of the improved Saxby &Farmer type, arranged in a manner similarto that shown with the mechanical ma-chine. As a still further check, there is placedat each signal and switch movement a cir-cuit breaker, from which wires are run tomagnets ])laced on the machine, the arma-tures of which are made to operate latchescontrolling the levers, so as to delay thecompletion of the movement
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ranged, by which it is madeimpossible to turn the levers that clearany two routes that may lead to a locking is of the improved Saxby &Farmer type, arranged in a manner similarto that shown with the mechanical ma-chine. As a still further check, there is placedat each signal and switch movement a cir-cuit breaker, from which wires are run tomagnets ])laced on the machine, the arma-tures of which are made to operate latchescontrolling the levers, so as to delay thecompletion of the movement until afterthe signal or switch has completed itsmovement, the object of this being toprevent any other lever from being moveduntil the switch or signal that is beingoperated has completed its movement; foruntil the lever has been moved to itsextreme position, the locking will not per-mit any other levers to be moved. Theelectric switch by which the indication issent to the machine, that the movement ofthe switch has been completed, is to beseen placed on top of the switch-and-lock. ELECTRICAL ANNXNCIATOR AND INDICATOR INSTRUMENTS IN P. R. R. quence of movements, by virtue of whicha clear signal cannot be given until theroute has been prepared for it by settingthe switches in their proper position, isabsolutely secured by the order in whichthe several electric circuits are this system, owing to the amount being the cost of the additional power ex-pended to provide the current used to workthe plant and for furnishing compressedair. Owing to there being no mechanical con-nections from the machine in the tower toeach of the different movements, this sys- 32 LOCOMOTIVE ENGINEERING. tem lends itself most readily to all applica-tions where there are many and compli-cated sets of switches, sharp curves, or toplaces where it woidd be almost impossibleto operate a mechanically connected ]) connections from the tower being ofwire only, the tower can always beplaced in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
