Technical World Magazine, Volume 12Technical World Company, 1909 |
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Page 176
... rail and a copper brush on the locomotive . Normally the line circuit is closed and the opening of a switch , the breaking of a rail or the presence of a train , or even a handcar , in the block opens the circuit which sets off the cab ...
... rail and a copper brush on the locomotive . Normally the line circuit is closed and the opening of a switch , the breaking of a rail or the presence of a train , or even a handcar , in the block opens the circuit which sets off the cab ...
Page 179
... rail and the line wires , so that the ' phone can be used only when the engine is over section a of third rail . A current of only half an am- pere is used on the line wire so that , according to Mr. La Croix , snow and ice do not af ...
... rail and the line wires , so that the ' phone can be used only when the engine is over section a of third rail . A current of only half an am- pere is used on the line wire so that , according to Mr. La Croix , snow and ice do not af ...
Page 181
... rail and a contact brush on the engine . If the block signal is in the stop position a current is switched into the third rail which on being picked up by the contact brush opens an electro- pneumatic valve and blows a whistle in the ...
... rail and a contact brush on the engine . If the block signal is in the stop position a current is switched into the third rail which on being picked up by the contact brush opens an electro- pneumatic valve and blows a whistle in the ...
Contents
MAGAZINE | 586 |
The Rule of the Roustabout | 591 |
In the Stranger Peoples | 605 |
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