3 ms·
You can probably add "magnets RR signals" (a reference to remotely operated railroad switches) to the list of things that he could have done with amplification.
by LV8 10y ago
You can probably add "magnets RR signals" (a reference to remotely operated railroad switches) to the list of things that he could have done with amplification.
- Animats 10y agoProbably train detection or train stop there, not switch operation. Edison never did much with railroad switches and signals, though.