The Lake County times. [volume] (Hammond, Ind.) 1906-1933, 1920-08-23

iof furnishing the spark at the plugs
! The vibrator coil has an arrangement
whereby incessant sparkling is produced
at one plug at a time as long as the
points OF the timer or distributor are
( IN contact. with the non-ylbrator coil
and tho magnetic. high tension current
- generated 90 produce single spark
just when the timer contacts separate
breaking the primary circuit. The
quicker this circuit is broken the more
powerful spark is produced at the spark
plug
> Valve clearance varies from two
! 60 thirty 1--we thousands OF an inch ac-
coTding to tho make of the motor. Each
manufacturing concern specifies the cor
/ rect amount of clearance necessary for
! efficient operation Of its motors and
such clearance should be maintained at
/ ah times TO obtain the most mileage
( from fuel aud power during operation.
=. In many cases the exhaust valve IS
made 10 open tribe more than he in
/ OF valve. but in no case should the in
! let open further than the exhaust.
| j. II an automobile is continuously
| equipped with some approved locking
/ device for spare tires an allowance OF
( , percent IS usually made in theft prem
/ iums providing The lock is always used
/ correctly and that it is kept IN efficient
/ working condition.
/ g. To remove an old valve stem and
/ replace IT with a new one. first make a
/ original place OF the stem. push the old
| stem into the tube md withdraw f.
! through the second hole that is made.
> he hat
! and draw ii up tight in its proper place.
I Vulcsnize the second opening. In this
way the valve stem opening in the tube
Is not injured or enlarged. insurins "A
more alright fitting for the new stem.
/ 6. Because of the fact that the mo-
tor is operating at greater speed VIXEN
I or high car speed, the car vii vibrate
more when low gears are engaged than
II will on high gear
s. According 70 reports Of the Ma
tional Automobile Chamber of Com
merce in June. more than $1,000 auto
mobiles and motor trucks were deliver
ed 20 dealers from factories over roads
and highways TO that month
7. IF ieaks are occurring al tbe seats
/ Of valves in a motor. the spark plugs
will have an oily or sooty appearance.
/ This indicates poor combustion and re-
/ qulres regrinding of the valves.
| s The kind or weight NJ luhricatinE
/ oil for motor should be determined by
mileage and not model of the motor. II
! the motor is new or has an entire new
fitting Of bearings. rings or ptstons the
lighter grades of oil should be used.
After three to FIVE thousand miles trav-
cling a medium grade is required Ex-
tensive use after fifteen to eighteen
thousand miles calls for heavy oil.
! 2. The first patent on rubber vul-
canization was secured by Charles Good
year in 1884. He discovered the vul-
canizing process in 1889. Robert W.
Thompson took out the first pneumatic
tire patent IN England in 1s4S
10. Distributor troubles which will
cause poor engine operation such as
knocking or mishring are worn brushes
broken. worn or pitted points. the pres
ence OF grease oil or water within or
outside Of the distributor case and
wrong placing Of terminal wires leading
TO the spark plugs water or oil even
on the outside % the housing may
cause a short circuit and consequent
skipping Of the engine. poor condition Of
while misplacing of spark plug wires
will produce the wrong firing order In
the engine. resulting in serious Knock
ing or total stopping OF its operation.
THIS WEEKS QUEsTIoNs7
/ What is a practical test for an
ignition coil?
2 How is a roller bearing in a front
wheel hub adjusted
3. What types OF brakes are In pres
ent use on automobiles?
a. How can radiator be painted
easily and quickly without the use Of
a brush?
8 What IS the cause OF vibration in
speedometer pointers?
g. What are two methods for timing
OF valves should the present timing be
incorrect, or on reassembling a motor?
J. What Is the firing order Of multi
pie cylinder engines? Is IT possible for
cylinders 10 fire in consecutive order,
as they are numbered from front TO rear
Of the engine
S. Is all of the gasoline vapor which
is drawn into the cylinders consumed
by the ignition of the charge at the be
ginning Of the power strokes
9. What IS the difference in results
from using low gravity gasoline as
fuel or that of high gravity When is
each used to most advantage
10. What magnetic trouble will cause