125 STANDARD ELECTRICAL DICTIONARY.

Circuit, Loop.

A minor circuit introduced in series into another circuit by a cut-out,

or other device, so as to become a portion of the main circuit.

Circuit Loop Break.

A supporter or bracket with two arms for carrying insulators. Its use is

to enable a loop connection to be introduced into a line which is cut,

so as to enable the connection of the ends of the loop to be made, one

to each end of the through wire, which ends are attached, one to each of

the two insulators.

Circuit, Main.

The circuit including the main line and apparatus supplied by the main

battery, as distinguished from the local circuit. (See Circuit, Local.)

Circuit, Main Battery.

The main circuit, including the main or principal battery in its course.

Circuit, Metallic.

A circuit in which the current outside the generator, or similar parts,

is carried on a metallic conductor; a circuit without any ground

circuit. The including of a galvanic battery or electro plating bath

would not prevent the application of the term; its essential meaning is

the omission of the earth as the return circuit.

Circuit, Negative Side of.

The side of a circuit opposite to the positive side. (See Circuit,

Positive Side of) It is defined as the half of a circuit leading to the

positive terminal of the generator.

Circuit, Open.

A circuit with its continuity broken, as by disconnecting a wire from

the battery, or opening a switch; a broken circuit is its synonym. To

open a switch or disconnect or cut the wire is termed opening or

breaking the circuit.

Synonyms--Incomplete Circuit--Broken Circuit.

Circuit, Positive Side of.

This side is such that an observer standing girdled by the current with

his head in the positive side or region, would see the current pass

around him from his right toward his left hand. It is also defined as

the half of the circuit leading to the negative terminal of the

generator.

Circuit, Recoil.

The portion of a parallel circuit presenting an alternative path, q. v.,

for a disruptive discharge.

Circuit, Return.

(a) The part of a circuit extending from the generator to the extreme

point in general, upon which no apparatus is placed. In telegraph

systems the ground generally forms the return circuit. The distinction

of return and working circuit cannot always be made.

(b) It may also be defined as the portion of a circuit leading to the

negative terminal of the generator.

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