Arrangement of switches and valves makes it possible to compare any piece of equipment with another already tested; complete switchboard for testing General Railway Signal, auto-manual train stop apparatus, has been developed in Springfield, Mass., shop of Boston and Albany; moving-track element; power supply; switches; other electrical apparatus.
Train control test board
Ry. Elec. Engr
Railway Electrical Engineer ; 19 , n 6
1928
2 pages
1 Fig.
Aufsatz (Zeitschrift)
Englisch
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