A brief description, with plan, elevation and cross-section of a standard distant semaphore signal, being introduced on the Pennsylvania Railroad.
Switch railroad signal
RR Gaz
1887
Aufsatz (Zeitschrift)
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
RAILROAD SWITCH DEVICE FOR MOVING RAILROAD SWITCH POINTS
Europäisches Patentamt | 2022
|Railroad switch device for moving railroad switch points
Europäisches Patentamt | 2025
|RAILROAD SWITCH DEVICE FOR MOVING RAILROAD SWITCH POINTS
Europäisches Patentamt | 2023
|