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Around 1900, many grade crossings had installed a relay-activated warning bell. This was an actual bell-shaped bell mounted atop a wooden post. Does anybody know what the warning bell sounded like? 1) clang clang clang like a train pulling into a station 2) ding ding ding like today's grade crossing signals, or 3) r-r-r-r-ring like an alarm bell. Does anyone know where a working example of such a grade crossing bell might exist? Thanks.
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