George Westinghouse: Fabulous InventorDodd, Mead, 1943 - 235 halaman |
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Halaman 100
... signal man in charge of a signal station set at every junction of two blocks . It was the duty of the signalman to set a danger signal against com- ing trains until the man at the station next ahead telegraphed him " All clear . " Then ...
... signal man in charge of a signal station set at every junction of two blocks . It was the duty of the signalman to set a danger signal against com- ing trains until the man at the station next ahead telegraphed him " All clear . " Then ...
Halaman 126
... signal , all changed . A workman's finger pressed the key and in an instant Menlo Park was in darkness . Ap- plause broke involuntarily from the onlookers . Before it had subsided , the finger was applied again , and the landscape was ...
... signal , all changed . A workman's finger pressed the key and in an instant Menlo Park was in darkness . Ap- plause broke involuntarily from the onlookers . Before it had subsided , the finger was applied again , and the landscape was ...
Halaman 229
... Signal Apparatus . Air - Brake Strainer Attachment . Air - Brake Cut - Off and Relief Valve . Automatic Electric Current Regulator . Combined Electric and Fluid - Pressure Mechanism . Interlocking Switch and Signal Apparatus . Pipe ...
... Signal Apparatus . Air - Brake Strainer Attachment . Air - Brake Cut - Off and Relief Valve . Automatic Electric Current Regulator . Combined Electric and Fluid - Pressure Mechanism . Interlocking Switch and Signal Apparatus . Pipe ...
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A VISIONARY IN SHORT PANTS | 1 |
HE CAN WHO THINKS HE | 2 |
A NURSLING OF IMMORTALITY | 3 |
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