Fig. 203 shows a device known as a "saw-tooth" arrester because of its metal plates being provided with teeth.
If you use a loop antenna, of course, no arrester is needed.
If this connection is poor it may render the arrester useless so far as protection from lightning is concerned.
This feature is not essential in an arrester intended solely to divert lightning discharges.
The passage of current to ground at the arrester, however, will be over a path containing nothing but wire and the arrester.
All currents above this critical amount will operate the arrester; the larger the current, the shorter the time of operating.
A form of Western Electric arrester particularly adapted for outside use on railway lines is shown with its cover in Fig. 210.
Diamond special spark arrester is used except in straw burners.
So, too, an increase of inductance in a circuit adds to the work of an arrester in breaking an arc.
He is the properest shape wherein they fancy Satan; for he is at most but an arrester, and hell a dungeon.