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Operation and adjustments of the automatic three wire telephone (1915)

Decker, Benjamin Harrison · leaf 23

An illustration from Operation and adjustments of the automatic three wire telephone, 1915, leaf 23 — /3 r Fig. 1- Circuit jDiagram of Party Line Telephone. 1. - Marttiofiic T^/a^cr.2..- 2. CoficfQ.rfse.r. 3. 7! I^.F. Conde,nse.r.4 -Xndvcfion Coil. 5. ~Xmpo/s& Springsand Grovnd Post. 6, -Groc//7c/ cut-offQnd Tran^. Springs. 6.~ 7c//r//7y a^d Look-out 3f^rm^s.3 - Lock,- out J ay10.- Lock-out…

Telephone · Theses

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