Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1921-02-13
100000 FORD CARS
NOW IN ACTUAL USE
Transmission Used ON This Auto Is
known ns Planetary. because
All Gears in Same Plane.
THEY ARE NEVER SHIFTED
Purpose OF This Kind Of Transmits
sion Is Same aS Others. to Give
Engine leverage and Different
Speed Ratios.
LECTURE: No. Isl.
The Ford Transmission

as circumstances may arise. because
Of which many OF our readers may
at some time OWE :; Ford. in addition
." their present car, or alone. it is
well worth while 10 study the spec.
raj transmission used ON il
The transmission on the Ford car
: known rs Planetary Transmission.
because ths various SETS Of gears are
always ma utaincd in the same plane
ih'I never being shifted as are those
used on most oincr cars
On the Ford tho clutch and trans
mission are built together and IL
might also 10 said that lie foot or
service brake is built into tho trans.
mission. IN" brake. clutch a"d trans
'n.r.Sston Gears being in one unit
Til" uurncse of tho planetary trans
nilsson is exactly the same as that o.
either iransmissionS. namely 20 give
the engine - leverage and different
Sucod ratios, and Ia give q means for
driving the car backward.
Lot " So" how the plauotary trans
nisSion acc2mpl sizes us purpose.
SuppoS" "" wanted to move Il SAT"
which would require a pressure Of
400 pounds NJ th- point Il. fig l. lC
here Mere an obstruction. or fuicrun.
= crcwh"r and. hy using II as shown,
move the SAFE with but u 100 pound
pressure Oh its end. G Thus We have
Now study Fig. > lie, us take tho
teeth ., The stationary gear y IS the
obstruction OF fulcrum as above. ana
t"t US assume j!at lnt lcttN OF thr
movable gear are whore We want
tho prcssur" Is ut II OF the safe. Thcn
TO cSori pressure OF 500 pounds nj
T. only zoo VIII be needed a, g Nh"
gears { might be regarded AS u IA;
Crowbar.
|, is hut q stop to change the por-
ton of gears SHOWN in Fig = To full
sears. rs shown in Zig. ,and in
Fig. :, which is side view Tho
point We can CONVEX; into a pin and
NC can have this pin on the i!y-wheel
Gears, the same as the sliding gears
ere hrought into neutral. there VIII
have 10 BE- some means furnished TO
by attaching Il brake drum TO the
gear II. which is 10 hc held statiou-
"rH. ana having = tooi-op"ratcd band
stationary or be released AT will
Ky observing Fla {, YOU will notice
hat when The drum is held sta
wheel, and. therefore, engine is re-
NolNln@. ;hnt the gears t. and q Will
r"!l about u. and 80 drive the gear
L: which j. connected To The rear
wheels through ihe propeller shaft.
'tc. The gears i and u might be
regarded ms revolving Crowbar.
When. however. tn" band |. is freed
ihcn Jh. drum Is Will be freed. than
20 the gear u. the gear T. and t; Will
LON roll on + and so simply drive
The gear - and It's drum backward.
thus there will b. no tendency to
drive tho car by tac running engine
You will note that no gears arc
shifted. tn" connecting OF the cnSin"
20 the rear wheels being accomplished
~ the tightening OF the band on the
onrm. aS 10 hold IL from revolving:
pushed by the freeing OF this band.
u tn, gears - and q wcr" ten
inches in diameter. and IN" gear l.
iN inches. while + was four Inches,
then tn. Leverage of tho pin c would
Sd" 70 !. hut this will not Il" the
'ncnc leverage. TN" diameter of the
circle through which the crank re-
wolves Viii he lass than the diameter
OF the circle OF thc pin 6 and SO
ihc:" VIII hn resulting reverse
!"N"raE-. Were tin" crank circle six
inches, only slN-;-nths Of the pressure
~ 'hr crank would b" cXcrt,d on the
rn - rhuS the resulting lcvc;aG"
would bc nut siX-tcnihs Of nvc. or
have assumed the crank circle
10 stmalify ma,tsrs This VIII b"
:" - Ga,irad ' S,i me
'h" rear wheels. The calculations
viii r-solv" themselves to this
Now as 10 ~" speed ratio Ky re-
mai ii the gears - and q are OF The
snme diameter. or have the same
lnmhcr OF teeth (Which they must
when ,hc 9in G has mad" complete
revolution, the ecag g viii have made
/" C"nni"t" 'cN'if'tiO ION shout tn. pin.
nG tn" tooth.+> ~iiT again he in the
position shown Now. The gear J. has
hut forty teeth. while j. vii! have
siNiy, and 50 when il makes 4 com
around hut two-thirds OF T.. In other
Words the tooth Il viii lac in mesh
Win the tooth II OF. gear u. Now
10" gears T. and q are ono piece.
when gear . has made one rcvolU-
lion. gear + viii also nav. made one
revolution and the tooth T. win have
e -.
"cr therefore, FOR the tooth Il to be
mosh"d with the tooth II the gear
VII have had 20 travel SO that
~ comes TO IL. which viii bc one
'hird az q revolution. Thus for every
revolution Of tn" Hvwhcci the gear
}. VIII max" e ihird Of i revolution
nr expressing 10 differently. the en-
gt"" vii max" tire" revolutions for
IS mo zssr. Z ana Z are qronsh,
rre greater viii he the engine speed.
M ,ee,h. s~ar i: ~oaij moe for
CH'S ton Cf rs G(tv-lve ;.elh and the
engine speed "oud he o. 10
When the gears. that Is. al four.
arc OF the SAFE size shore will To-"
10 car speed. while L y is made
trail point, IN" car will revcrS. How
mis- principle is used for reversing
VII l." shown next.
q Abou, . wscG ago removed The
carbon from my six auto en-
ain" en- quite sure ! rensSemb!cd
hccr-n" noisy rho noise comes from
the pusd rods aud rcckcr arms. Have
adjusted rocker aims 10 permit; Do-
gauge 20 pass between rocker arms
ana Vaiy" stem. Could YOU tell ~"
TOW 20 eliminate the nUiSc%--E J.. y.
= o. s gu!,. pCseible that The
rocker arms rho noise of overhead
valve engines is NOR" often dU" TO