Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-05-09
|s|MPL|F|ED LESSONS IN !
CARE OF AUTOMOBILE
Fsnginccr Gucrrlich Continues DIS.
cussiOn Of Cars Switch or
Distributor.
BY FIRED. &. GUERRLICH, II. Il.
Lecture No. 1872.

- RANED. ~ w fhItIlCH, n. L..
Lecture No. 1872.
Last lecture We saw how tho hiph
voltage current was induced into the"
secondary wire. but found that, to
ai airs four spa, spark plugs which fire at
from which but Il single wire comes,
difficulty arose.
We can overcome this difficulty by
will switch or distribute the current
10 tho plugs In the required firing
order: Such Il switch or distributes.
rs II Us termed, Is shown in the draw
This Is a drum, the shell. III" OF
Fhich ~ made OF an insulating ma i
,eriai. but which has inserted In II
AZ regular Intervals metal pieces,
haVinS binding posts for wire. Re-
Voivims inside the drum Is n Rotor.
made OF good conducting material.
winch VIII come in contact with the
metal pieces above seferred to (they
other
II the main secondary wire. ~"
DC CONNECTED to the center OF tho
Rotor. r. as this rotntes. It will
order in which the wires nre con-
neeted to the segments. In the draw
tng segment "a" ~ Connected to the
wire n,m, Of nlgE l. 10" to the wire Of
plug 3. Thus the current will go TO
The plugs In this order and the
cylinders will be fired in this order.
Method OF interruption.
NThe distributor Is usually placed
Immediately above the interrupter.
butter rotor being on the same shaft.
but insulated one from the other.
They are 30 set that the rotor is In
contact with ono Of tho segments
he interrupted hits the piece. &C."
pr the arm. IN" or In other words.
,very time the primary current is
Interrupted. -. /.
TO again trace the secondary cur
TENT. we find now that 1t starts at
he coil. then goes to the distributor.
where 1t Is distributed to the plugs.
the firing order. and must now
feturn to the coil so AS to complete
he circuit. Instead OF running
wire buck from each plug to the coil.
be plugs are screwed into the cylin-
lers and tho current is allowed to
fcturn through the metal Of the
+ngine to single wire which comes
rom the coll and Is somewhere con
hected TO the engine. or, as we saw
previous lesson, through the
sround
In most systems the primary cur
fent Is also allowed to return
trough the ground. Thus. in tho
lrawinG. one wire from the battery
grounded. and the arm. ~" Is
rounded. SO tina; the current goes
trough the ground. There viii.
however, be no wire from "P," as
hown. The pin up" being OF metal.
thus. unless insulated. grounded.
we want TO start the engine. we
lone the switch. thus nm electric
urrcnt Will How from the battery
hrSush the switch. the .,ooii. tho
ntcrrupter and then through the
Fround back to the battery.
IT We now crank the engine we
viii also make the shaft, *" on
which both the interrupter cam. "E."
astcned. with the result that one
the hammers. B." will hit the
o!nt &C." and thus interrupt the
Urinary circuit, and there Will he Il
hot OF high voltage cur.en,
he Rotor. IF" and out through that
sgment. &C." with WHICH the rotor
In contact; this current VIII then
through the wire fastened 10 1t
the plug. where 1t will jump
cross the points. giving spark as
The engine and distributor shaft
re- coupled together. or timed. in
ich . way that the cylinder IN which
ic spark comes. viii have the piston
p, just ready to start on the power
roke. Thus the engine will now
'ch time a piston is up and ready
pr the spark. the primary will be in
rruptcd and the Rotor. #" so set
10 send the current to the correct
Finder.
In the drawing condenser is
iowr, the purpose of which is to
event tho burning out OF the In
rruptcr. or. as they are often
iown. platinum points. This will
explained later.
he Distrlbutor System Instrument.
Figs, l. . and 3 OF the Illustration
ow the parts OF the Distributor Sys-
m instrument. Fig. being the bot
M portion containing the Inter