NDLI: Some phases of railroad telegraph and telephone engineering

Content Provider	IEEE Xplore Digital Library
Author	Rhoads, Stanley
Copyright Year	1920
Abstract	Based upon the idea of a duplex being a three-wire circuit, successful use has been made of a real line instead of the usual artificial line resistance box and condensers which are standard equipment in duplex sets. This “real” balancing line balances the regular line almost perfectly under changing weather conditions, needs no additional balancing at such times and hence can be designated “self-balancing.” It also balances for inductive disturbances to which both line and balancing line are exposed and for line irregularities such as short lengths of cable. This assumes that the duplex line and its balancing lines are alike in characteristics; are on the same pole line; have the same length; kind of wire, and, in fact, are twins. The two sides of a composite are very good for this type of set-up, but the plan is also applicable to any two similar circuits, such as straight wires or simplexes provided they are reasonably alike in kind.
Starting Page	387
Ending Page	397
Page Count	11
File Size	6453036
File Format	PDF
ISSN	03606449
Volume Number	40
Issue Number	5
Language	English
Publisher	American Institute of Electrical Engineers
Publisher Date	1921-01-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Relays Wires Resistance Steady-state Repeaters Windings
Content Type	Text
Resource Type	Article

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Some phases of railroad telegraph and telephone engineering