Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-04-25
.SIMPL|F|ED. LEssONs IN.
CARE OF AUTOMOBILE
Engineer GucrrIich Explains Mys-
teries and Actions OF In
duCtiOn Coil.
BY RREDERICI< q. GuERRLICK,
NJ. L.,
lecture No. 100.

w.
;. In the last lecture told you OF the
laws and actions of an electric cur
rent. and magnet. which are used I'm
me design OF the Induction coil.
am giving you here the way<my own
imagination let's me picture this ac-
iron In my minds eye.
First, / must again tell you OF a
simple experiment. IL we laid n mag
m ,t,r on on table. and put q piece of pa.
some iron filings on The paper. these
hllngs upon tapping the paper would
FORM themselves in definite lines. as
shown In Fig. !. Thus proving that
There are certain lines OF force rum
hlns from one pole to the other and
taking the course shown by tile III
inEs. Electricians call these mag
Will be millions, depending on the
strength OF the magnet.
Let us imagine that when the soft
lton core is not magnet. these lines
are ~ the iron Itself AZ shown in
Fig. 2. and that when the core is
magnctized. they are sort Of blown
out from the core, much the same as
Toy balloon acts when being blown
mp II their ends be fastened TO ends
1.-THE core. the result would he that
these iines would then bulge out
from the side OF the core unit! they
took the form OF Fig. l.
Now. suppose a wire were wrapped
around tho core. Then these wires
out. and the lines would then first
AXE the form shown In Fig. 3. until
the strain became SO srcut that they
snapped In snappns; the lines
would coil. or whip lash. about the
wires. There being. however. mil
lions OF these lines. more OF them
he held on it. and they will. there
fore. be forced 10 travel along the
wire Thus the magnetic lines will
haze been converted into electric
lines. or electricity.
Let us assume that after the lines
have snapped nhou: the wires they
succeed in join!np their ends and
mus take the form shown In Fig. 4.
INA NV when the core Is ds len ins.
form shown in Fig. .. Az they NEE;
ne wires while contracting. they will
snap about the wires and thus send a
current OF electricity through the
wires. much the same az in the pre-
vtons case. bu, in the opposite d.
Las, lecture YOU were told tina, i:
sof, iron core have n coil OF wire
wound about H., it wlll he n magnec
through the wire, and that this uc-
ton Will work in the opposite dircc-
tion that IL. IL core be suddenly
magnetizsd or d"maenetized. cur.
rcnt Will flow in the wirns co!lcd
about iD: and that the voltage OF
this current viii he dependent on the
number OF turns OF wire.
Let US now see how we can use tho
above ?ctinas 10 transform the low
voltage current Ito give which we
cap conveniently carry sufficient bat
ier!cs or larg" enough geuerator)
into the high voltage current which
we must have in order that II can
bus, or, jump across the air gap OF
Referring 20 Fig. G. this shows a
core. ~" with n single coil Of wire.
"B," wound about one end OF II. From
he above. Figs. : and g. We learn
hat II we could suddenly magnetizc
the core. "a" a shot OF current would
fiow through the wire. CO. How can
we magnetic this core Why by
sinplv winding about the oihcr end
another coll Of wiz" and letting n
crrren; pass Through this from a
battery or other source ana having 4
switch In the circuit for controlling
the flow OF IN. current.
LIZ shows what re now have
~ being the core: b the coil in
which we want TO make Il cIrrcn
How: -" tho coil In which current.