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Battery Ringing Telephones RAILWAY TYPE N 1181 shown in the right
The hardwood case is semi-matt polished and the exterior metal fittings are black and bronze. Instruments with one, two or four plunger keys can be supplied, the illustration showing a 4-key set modified for 2-key working, the inner ones being shrouded. Key springs are wired in the set to terminals which can be strapped to suit various operating requirements. A high, medium or low tone dome, as specified on order, is fitted on the 100 ohm DC bell which, in the N1183 type sets, is directly operated and in other sets is actuated via the contacts of a 5000 ohm polarised or non-polarised relay. A differential relay can be fitted, if necessary, an extra wire being included for this purpose. The instruments contain a 2mf condenser for the receiver circuit, anti-side-tone induction coil, hook switch and terminals for wiring a remote bell if required. The Bakelite micro-telephone can be supplied with or without a transmitter cut-off switch in the handle, as indicated in the table below. Overall dimensions 9 x 11 x 5 inches.
Click here for a blue print picture of the N1181 - Click here for the Diagram N68765 Click here for a blue print picture of the N1182 - Click here for the Diagram N68766 Click here for a blue print picture of the N1183 - Click here for the Diagram N68767
Click here for an article from the
Ericsson Bulletin The model N1182F2 contained a rectifier fitted to the right of the relay on the front cover. Additional Pictures
Advert for railways telephones
N1181
N1181
N1181
N1182B5
N1182B5
N1182B5
N1183A2
N1183A2
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Last revised: May 24, 2024FM2 |