Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-05-23
=slMPL|F|ED LESSONS IN
CARE OF AUTOMOBILE
Gucrrlich Explains Vikrntor Coil.
4. Questions Of Car Owners

By FREDERICK G. GUERRLICH,
Nm M.


In this lesson we will study the
coil used in the ignition on the Ford
cars. and also in combination with n
. magnetic, on some OF the best and
/. hiEhest-priced cars. This coil is
known as vibrator coil.
LAS in the distributor system, this
system must have in the primary
circuit. a source of current. a switch
J for stopping the flow OF current when
!. the engine is 10 be stopped. a coil,
( Il device for interrupting the cur
rent when the spark is to conc and
n device for timing the interruptions
so that the spark will come in the
cylinder when the piston is in the
proper position.
The great difference between the
vibrator coil and the distributor
operates. In the latter system this
is done mechanically, while. nthc
former, IL is doEo maGnctically.
The vibrator.
Let US study this magnetic inter-
: rupter. We saw when We studied
: the coil. how, when a soft iron core
: has a coil of insulated wire wrapped
about il, and Il current of electricity
is allowed to flow through tins con.
piece OF steel to it. Ii We had a
device as shown in Fig. tin which
piece Of steel is fastened to the
: spring, 20" the Oter end of which
closed the switch. a current OF cleo
tricity would flow through the wire
A from the battery, then through
the switch. then the wire Is" and
and back TO the battery through the
wire D. AS this current flows the
core Wi! become magnet and the
steel Will be drawn toward it. thus
bending the spring. %" If we open
Inc switch the core will be demaS-
netized and the steel will spring back
TO It's original position.
Instead of connecting the wire
b dierctly 10 the spring as above
let us make an indirect connection.
or one as shown IN Fig > Here the
wire, %" is connected TO the brass
arm. W. so that tn. current will
now flow through this arm. then
me screw, o. then the point "p"
then point @" and along the spring
u" as before.
when switch Is Closed.
Let US see what VIII now happen
current flows the core Will become a
magnet and thus draw down the steel
DOCK, making IL take the position
sba, the in noj tGs + rCu viii notice
separated. This means tina, the ,iow
or the current; has been INTERRUPTED
SO mat the core viii become dcmac-
netized What VIII now happen Ia
~, Al
the points, p and O." VIII again
come tigcther, thus again the current
VIII flow and the core be magnet,
mus again separating the points. Up"
ana g. thus stopping the flow OF
The current and SO dcmIEnctizing the
core. when the steel will again spring
up and bring the points together
again. Thus. you Will notice that the
steel Is constantly being drawn down
ana sprinEing uD, or in other words
vibrating. Each time the steel is
drawn down the current is intcrrupt-
ed. and you viii note tina; this Is
done magnet!cal.y. Thus. wc\ have
magnetic intcrruptcr.
You have vibrator coil such as
this in your home. study your elec-
trio door bell or buzzcr. You will no.
.tIce that IL operates exactly as de-
scribed above. there simply being an
arm on the vibrating spring with
clapper on one end which strikes the
bell
What has this to do with tho Civ
ing OF the spark? We know that IL
we have core with a wire coiled
about IL. that every time the core is
magnet!zed or dcmaGnctizcd in some
way there Will be a shot OF current
through the wire. The above shows a
way TO magnetic or dcmisnetizc the
core. so that IL we We're to wind
around the vibrator coil explained
above. another coil having about n
thousand more turns OF wire than
there arc in the vibrator coil. there
would be shot of very high voltage
current every time the points "P''
and c." are separated. and thus We
would get a spark a, the spark plug