Author Topic: Series ringer pic needed  (Read 351 times)

Offline RB

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  • Love old phones
Series ringer pic needed
« on: June 04, 2019, 05:57:49 PM »
can someone find a pic of the wiring of a series ringer in a wood phone?
I need a good picture example of how it is wired, variations accepted
Thanks

Online Jack Ryan

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Re: Series ringer pic needed
« Reply #1 on: June 04, 2019, 08:19:30 PM »
can someone find a pic of the wiring of a series ringer in a wood phone?
I need a good picture example of how it is wired, variations accepted
Thanks

From Kellogg Bulletin No 8 - Magneto Telephones, 1903

The ringer is a low impedance type - about 80 ohms.

Jack

Offline dsk

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Re: Series ringer pic needed
« Reply #2 on: June 05, 2019, 02:06:20 AM »
These extremely early telephones were made for several phones in series on the line, and the lo impedance of the ringer was a must due to the voice signal had to pass trough all the ringers of the phone except the 2 in use.  This system was left pretty early because the loss in the circuit was much higher than if they all were shunted on the same line, and the ringers was of high impedance type.

dsk

Online Jack Ryan

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Re: Series ringer pic needed
« Reply #3 on: June 05, 2019, 02:40:10 AM »
These extremely early telephones were made for several phones in series on the line, and the lo impedance of the ringer was a must due to the voice signal had to pass trough all the ringers of the phone except the 2 in use.  This system was left pretty early because the loss in the circuit was much higher than if they all were shunted on the same line, and the ringers was of high impedance type.

dsk

Although most telephones were bridged by this time, series telephones and parts were still listed in catalogues (including WE) in 1916 and were still in the field long after that.

There were versions of the WE 317 wall telephone and 300/315 magneto ringers made for series connection.

This configuration is not to be confused with series circuits where the transmitter and receiver were connected in series and there was no IC. It gets confusing when words get reused - early "automatic" telephones were those with a gravity operated hook switch.

Jack

Offline RB

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Re: Series ringer pic needed
« Reply #4 on: June 05, 2019, 07:23:28 AM »
Thanks Friends!
much appreciated!