Inductor.
(a) In a current generator a mass of iron, generally laminated, which is
moved past a magnet pole to increase the number of lines of force
issuing therefrom. It is used in inductor dynamos. (See Dynamo
Inductor.) In the cut Fig. 202, of an inductor dynamo i, i, are the
laminated inductors.
(b) In influence machines the paper or tinfoil armatures on which the
electrification is induced.
Inertia.
A force in virtue of which every body persists in its state of motion or
rest except so far as it is acted on by some force.
Inertia, Electro-magnetic.
This term is sometimes applied to the phenomena of self-induction, or
rather to the cause of these phenomena.
Infinity Plug.
A plug in a resistance box, which on being pulled out of its seat opens
the circuit or makes it of infinite resistance. The plug seats itself
between two brass plates which are not connected with each other in any
way. The other plates are connected by resistance coils of varying
resistance.
Influence, Electric.
Electric induction, which may be either electrostatic, current, or
electro-magnetic.
Insolation, Electric.
Exposure to powerful arc-light produces effects resembling those of
sun-stroke. The above term or the term "electric sun-stroke" has been
applied to them.
[Transcriber's note: Operators of arc welders are prone to skin cancer
from ultra violet rays if not properly protected.]
Installation.
The entire apparatus, buildings and appurtenances of a technical or
manufacturing establishment. An electric light installation, for
instance, would include the generating plant, any special buildings, the
mains and lamps.
Insulating Stool.
A support for a person, used in experiments with static generators. It
has ordinarily a wooden top and glass legs. It separates one standing on
it from the earth and enables his surface to receive an electrostatic
charge. This tends to make his hair stand on end, and anyone on the
floor who touches him will receive a shock.
Insulating Tape.
Prepared tape used in covering the ends of wire where stripped for
making joints. After the stripped ends of two pieces are twisted
together, and if necessary soldered and carefully cleaned of soldering
fluid, they may be insulated by being wound with insulating tape.
The tape is variously prepared. It may be common cotton or other tape
saturated with any insulating compound, or may be a strip of gutta
percha or of some flexible cement-like composition.