.~ Using line or loop condition detection (e.g., line circuit) {7}
380
.~.~ By bridge circuit
DEFINITION
Classification: 379/380
By bridge circuit:
(under subclass 377) Subject matter including a network arranged so that, when an electromotive force is present across one branch, the response of a suitable detecting device in another branch may be zeroed by suitable adjustment of the electrical consistents of still other branches.
