Dictionary.net

• A current which, though too feeble to blow the usual fuse or to injure at once telegraph or telephone instruments, will in time burn them out.

2010 - New Age Dictionary Database
By Oddity Software

• A current which, though too feeble to blow the usual fuse or to injure at once telegraph or telephone instruments, will in time burn them out.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.