The Morning Tulsa daily world. [volume] (Tulsa, Okla.) 1919-1927, 1921-02-06

Wunlug current through poor con
meet IONS ur lnnky WIRING
The function ~ the intcrfuptcr t.
probably the nOW Important pa't ot
tup sutlic system HA fat as H"curlng
good tgultipn is concerned. Regard
less ~ what fnhkv 81 Bys'ern w ein
pIoy ed. the efficiency ot the soc
undaty current induced depends on
the tharpncW and timing OF the
breaking ~ tho intcrrupter points.
WHOM luterruptnr points ara closed
tnt G.VoIi circuit is flowing htough
thcm AZ soon as they are brok-
on open tho 6-vult current ~
interrupted and u counter current OF
nigh voltage ~ Induced In m" op-
pvsire dircctlon IN tho secondary
winding.
ordinarily Rovoft arc or flame
would Ic drawn horoHs the inter
ruptw points when IN" circuit Wns
hrultsu uui the point would bo rap
ldlv burned away Thia IL prevent
od however. by connecting Httl"
oIcrtrlc mechanism known ne SON
irusrr across thcsc points. This
condenser HlworbH the Cutront Which
would 40 into the creation ~ the arc
between the iutnrrupt"r points ana
thus prevents tho points from bnins
burned away and lncrchDos their Ire.
Ia spite Of th.s condenser, after
certain lanRth uf timn tho contact
points need attention
In the first place. the plug itself
muat be ln good condition and It
pays TO buy the beet of plugs. the
sparkling points must bc at tn"
proper dis'uuO, apart In order 10 hc
cure the maximum efficiency, II tho
pluv points are too far apart the
spitk win be drawn out thin and
. tho nnlntn 100
! close together Inc spark VIII he 10
short that IT will not have the do.
sired volume. The proper distance
is about .0Gb in which Il Just about
/ hnIf way between 1-82 and 1-6t In.
Great care must hc exercised in
removing ana replacing spark pluEa
! II is very easy 10 bronx the porcelain
on spark plug u the wrench B'~
of whilc tightening e.. u is MOI
ne'oasary 80 put very severe pres
suro on plug whiln tightening 81
~. owing to the shape OF the thread
IL should mako a. very good efficient
seal when brought home with me-
dunn pressure. Good baskets, how
ever, should be employed TO guard
against leakage.
When all Of the uuita Of the ig
nitiou system are in good order ant
rendering efficient service, the fina
/ fnNll'' u tllffN w ~ wv AAi'f'ps
Practically 90 Per cent OF our cars
nru SO TIMED that whon the spark
lcNrr IN IN full retnrd position the
apnrk will occur on upper deac
center. A. least. tho setting Is sucf
that the iutcrruptcr points Will sepa'
rate Just as the piston ~ on upper
dead center in the cylinders. Tm'
lmakos the spark occur lust a little
later than dead c"nter, owing &c
what electricians call Lax There are
two kinds ~ Lag IN an electrical Ts'
Item, ono Of those being mechanica
land tho other electrical. The word
Ian simply Expresses the time re-
puircd between the breaking OF th'
intetrup,cr points and the spark a
the plug. Naturally II takes littl'
! time for tho electrical phenomena tt
occur and I'm snmr systems there ID
also "a certain amount or meChanica
lag.
In timing tho ignition. therefor"
tho spark. advance lever ~ genera
set To It's fun rctnrd position and m
adjustments. then mndo 80 that IN
. Intrrrupter poius separate them
, selves when the piston reaches up
per dcnd Contrr This position o
the piston can generally he de
termined nv the markings on IN
flvwheel with the advance lovc
connected ny by tho usual linknge q
tho distributor head. the desired al
vance can be given in operation
w. A. Warren In Motor,