Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1918-07-07
bHaPL|F|ED LESSONS IN
CARE OF AUTOMOBILE
planetary Transmission Described by
e Expert In Language Easily
- Understood.
SOME QUESTIONS AND ANSWERS
Problems OF Machine Owners Solved
v by Guerrlic!l. Who Explains the
rsWorkings OF MANY of the Simple
Devices Which Often Prove Puzzle. |
ALTO LESSON 40. DJ.

s. In studying the forwaCd-drivc gears
ssbt the planetary transmission. we saw
sthat as the diameter and number OF
i the teeth in the gear approached one
another that the speed ratio increased
Until finally, when all the gears are
Che same size the ratio would be in
n Unity to one. or, in other words. the
driven gear would not be moved at all.
M THE size of the driven gear be row
made smaller than its driving gear
Z syou will remember it was larger than
z Ats forward drivel then the driven gear
: will be driven Backward or reverse,
Z Like. for the forward drive. the more
y nearly the gears are OF tbs same
diameter the greater viii be the speed
ratio and the greater the leverage.
All that is necessary. then, /" nave
a. reverse drive. is to add another
drum with gear larger than the
Eriven gear, so that we viii get Il
construction a shown IN Fig. > Here
The driven Scar-that is. the gear
which is connected to the rear wheels
by the propeller shaft. djffcrcntial. etc.
sis shown in black. The gear VI is the
reverse gear, while / is ITS drum. and
the gear is the iuw-specd gear. IL be-
Ing its drum
In studying how the low-speed for
ward drive was accomplished We saw
that when the band Of the drum was
loose. so that there was no resistance
TO revolving Of either the drum OF its
gear, that then the gears T.. q and -
OF Fig. :, would roll around the gear
ID, without moving IL. The low .s',r.d
gear l.. and its drum revolving back
ward. When. however. the band Of
the drum is tighicncd by means of
the foot pedal. the drum, and its gear
f will be stationary and now the
nd a ~ y
gear f. ami in doing 50 viii drive the
gear d. and thus the rear wheels, in
forward direction
81 The reverse drive y obtained in the
same way. only now the reverse pedal
is used. which viii tighten the band
on the reverse drum i. so that the
gears r. g and Wi iuI around the
now stationary gear NJ, and because
this gear is greater IN diameter thai.
y, the latter vii! he driven backward
and SO the car viii he driven backward
: The gears. +. i and -. watch are of
one piece, and are on = pin on the an
CINE fywheel are called triple Gears
There are three sets 20! these triple
gears.
The slow speed ana e-cr>s dram are
placed side ~ Ste IN. gears are at
tached TO III, yruut, ny means OF
tubular sleeves. 're slows speed gear
and sleeve pas ~ .h:ouGh the sleeve
OF the reverse gear This l. shown in
8 FiEj :. Her The l.a,ahrA portion Is
represents til lcy-sr.cI gear and
& drum, and thu hAtch-i portion = The
reverse gear eu. h-uu
In the Ford transmission tie driver,
gear. instead %. being connected ;'irec,-
Il lS 10 the propeller shaft : attached 70
4 q third drum. this third drum with it-
brake band heius used as tn. foot ar
= service brake of the car. it is shown
IN black.
When the car is standing s:il while
the. engine is running tn, slow-spced
drum VIII revolye backward aMG re-
verse drum forward Should these
drums be even slightly held n. ar
Will have tendency to move For
This reason 1t is common thing TO
see Ford cars move the instant the en-
CINE is started. even with the e,ncr-
Gency brake set. the driver rushing into
the car and applying the foot brake.
or having some on" apply this brake
Whtle he cranks. The cause OF this is
mat the drums are not free as they
maS. have dragging bands while dir,
or gummed oil may also he ho!diu.
them in some way
y AS explained IN -.r.,,, i.s-r .rss
trouble may also he du" 20 the adjust.
ment of the Gluten
Having the three 'ripl. gears mesh.
ING with single SET Of center ... d.
makes it necessary th4i the gears b.
mark is mad - ,ht.t. s,5 ,, f,i'" p
sembling the;t i'nncn marx. ,ny.. ~
SO placed that jhey come IN tn. mann.
on the ccnter gear. Unless ANS he
gone, the gears Viii not e. together
some plan tar. 'raus,'i-s lois no
mark will be lDUnd on inc e.ritr- -.,-s
When this is The ctsr the oun,.f, r,,rl,s
on the triple M tis mus. =, r,l...t
that lines dra "n 'hrou%h tn, ulari,e
anu the center OF tho gears wi. meet
In the center Of the rs wheel