Railroad Signal Relays
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Railroad signal relays play a crucial role in both
the past and present of railroad signaling. In previous years,
railroads wired signals
with entirely relay-based systems. These systems were very robust,
and can often be found still in operation. However a price must
be payed, the relay bungalows and relay rooms in interlocking
towers had to be massive to fit all the equipment inside. This
made
them a prime target for much smaller and far more powerful microprocessor
based technoligies, which have began to take
over the job of the relay.
Union Switch and Signal Co. Relays
General Railway Signal Co. Relays
