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American Electric Wood Phone with Ringer on the inside

Started by ahah64, February 04, 2017, 06:20:45 PM

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Jack Ryan

Quote from: unbeldi on February 06, 2017, 08:24:51 PM
I think that would be a good exercise to start mastering a push button code-signaling magneto phone.

Yes, that's what I thought.

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Divided ringing is of course a possible scenario as well, just as metallic ringing is.   That provides some (semi-) selectivity of stations signaled by code ringing.

Not much of that on railway lines and a lot of telephone subscribers didn't like the idea. Calls via the operator cost money, direct calls to same party line subscribers did not.

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Attached is possible schematic for the metallic ringing variety with ground-return AC signaling to the operator only.
When the subscriber cranks the generator without pushing the button, all ringers on the line sound, but when the button is pushed, the line wires are shorted, and generator return is switched to ground which completes the drop circuit in the exchange, so that the drop triggers when cranking the magneto.

This diagram also shows the sure ring condenser installed.

I hope the OP will post something that will indicate what is actually implemented - probably not much different.

Regards
Jack