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Патент USA US2410921

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Nov. 12, 1946.
F. w. AVILA
’
2,410,921
POWER TRANSMISSION DEVICE
Filed Jan, 19, 1945
4 Sheets-Sheet 1
NW5 12, 1946.
I’
F, w, Av||_A
2,410,921 ‘
POWER TRANSMISS‘I'ON pnvxcm
Filed Jan. 19, 1945'
‘
4 Sheets-Sheet 2
Nov} 12, 1946.
F_ w. AWLA"
POWER TRANSMISSION DEVICE
Filed Jan. 19, 1945
2,410,972l _
v
4 Sheets-Sheet 3
129a
)6
‘ Nov. 12, 1946.
I
F, w, “ILA
POWER TRANSMISSION DEVICE
Filed Jan. 19, 1945
2,410,921
7
4 Shéets-Sheet 4
1%95
Patented Nov. 12, 1946
2,410,921
' UNITED "STATES PATENT forms l
lffimi?siiulfilo. ..
International Harvester :Qompany, a corpora,
' .tion of New Jersey
Application January 19, was.“ No. 573,550 ' I -v
10.0mm. v(cl. 14-30) _ , ,
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a,
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a
. condition of the gearing andother mechanism of '
. This invention relates to a power tron
device. ‘ More speci?cally it relates to ,a‘variable
speed transmission.
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the tron device.
.
v‘Referring to Figure 1,~the‘ casing structure,
.
Most automotive vehicles have used. change
which» in any automotive vehicle would ‘be ‘rigidly
speed transmissions of the sliding gear type. Re-. . secured to the engine structure extending rear
cently, considerable development work has been ,wardly therefrom, includes three housing sec
done with automatic or semi-automatic trans;
tions.~ A forward- housingseetion-ili-having a
missions which .81111',t_irom one speed to another J ‘front wall II is secured by a?ange l2 to a?ange
upon vattaining certain speed or load conditions.
I! on acenier housing section I‘. Said ‘section
'' Fluid drive couplings'hav'e also been usedito some 10 is secured to a?ange I! of the rear'housing
extent, said couplings giving a resiliency inthe
section It which provides a. casing for the change
drive mechanism which makes possible the use
speed mechanism; ‘ The rear end oi‘ the crank
of change-speed devices oi a positive ‘nature, the
shaft I1 is illustrated, as projecting into the for
?uid drive coupling taking up the shock‘ allow
by slippase.
.
-ward housing section i0.; Said crank-shaft'ds '
provided with a ?ange l8 which is secured to a
housing," which forms part v‘of a ?uid drive
mechanism. Said housing I! is connected by a n
\ t?ange 20 to a ?ange 2| formed on a second hous
'
The principal object or the present invention-7'
is to provide an improved transmission incorpo
‘rating a plurality of clutch and brake devices.
A more speci?c object is to provide a trans? " ing 22 which cooperates with the housing" to
mission in which speeds may be selected by the v20 provide a reservoir for a ?uid drive mechanism.
‘use oi'clutch and brake devices. 57 _
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A-?ansed sleeve 23 secured to the housing'22.
Another subsidiary object is vthe use" 01' ex
supports a ?anged sleeve 2lwhich is secured ‘by '
-panding coil spring clutches andbrakes in a
'cap screws 25 to a member 26 which is the driven
transmission device.
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Another principalobiect
typeotn transmission with metallic spring
and brake devices.
’
' portion of the ?uid drive coupling. vSaidmem
'
utilize aplanetary
her 2‘ carries a plurality of‘; radial veins 21 which
25
1 cooperate with radialveins 28. on the housing I!
clutch ‘
'
to torm a ?uid drive mechanism oi.’ a conventional
type such as is now. in extensive use on automo
Another'subsidiary object is to
clutch .
. and brake devices engageable in one relative di
tivevehicles.v
rection of _two cooperating members “between 30
a
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"_
The housing I! is'secured to the ?ange It or
> which the clutch is placed and overrunning-in
the ?ywheel oi the-crank-shaft H ‘by a plurality
the other relative direction of rotation of_ the
or bolts 29. 'Said bolts also secure a ?ange”
cooperative members.
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Another object; is to provide an- automatic
formed ‘on a‘stub shaft 3| rigldlv to the crank
shaft !or‘ rotation therewith. ' By means of‘ a
change-speed device utilizing spring type clutches 35 ball-bearing assembly 32 the'mem'ber 26 and the
and brakes operable by applying pressure to a
iree' end of a coil spring clutch element.
are rotatably mounted concentric with the'axis
The above objects and others which will be
apparent ‘from the detail description to follow,
are attained by a construction as shown ‘in the
drawings, in which:
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structure secured thereto including thesleeve 24 -
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Figure _l is a side elevation of a transmission
device particularly adapted for automotive ve
hicles, with a portion broken away in a vertical
oithecranlt-shaft.
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-» The sleeve 24 is'splined onto a transmission
40 power input shaft 32 which extends‘rearwardly
from the ?uid drive coupling, as shown in'Figure
v1, to the change-"speed portion oi‘ the device, as
shown in Figure‘ 2.
1
>
. The rear section or'casing ll o?the housing
v45 structure cooperates with a verticalwall 34, as
section to show a ?uid coupling device;
'
Figure 2 is a vertical longitudinal section -' shown in Figure 2,- vto provide a lubricant com
through the change-speed portion. oi’ the trans_-_.
partment ior- thechange-speed portion of the
mission device shown in Figure 1;._- i.
transmission. - The wall 24 is an inte'gral‘portion '
v
.
Figure 3 is a simpli?ed showing 0!’ the con
or the center section l4.
outwardly extend:
struction of Figure 2 with bearings and othervv 50 ing ?ange. 26 :formedon the wall 3| provides
constructional units omitted so that the opera- . I means. in cooperation with a cap 36, tosupport
7 'tion of the functional parts‘can’bebetter ‘de
‘
scribed and understood.
. Figures 4, 5, and 6 are similar
'
Figure 3,- each
oi these four ?gures showing a di?'erent speed
' a ball-bearing assembly 31 in which the shaft 38
is rotatably mounted.
. ;
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The wall it. in'addition’ to
an integrally extendingu ?angewhich
the is‘ formed
as, as,
2,410,921
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a sleeve 0 concentric with respect to the shaft 83.
The inner cylindrical face of the sleeve 0 is ?n
ished to provide an engaging face for a coiled
a ball-bearing assembly 52 in the sleeve P of the
planet carrier 39.
spring brake B. Said brake is carried by a sleeve
entirety by the reference character 53, is ,mount
A rotatable drum structure, designated in its
- N which is an integral extension of one member 5 ed in the casing concentric with respect to the
88 of a planet carrier designated in its entirety
by the reference character 39. Said planet car
output shaft R and the input shaft 38. Said
drum structure includes a substantially flat an
rier includes a plurality of short shafts 48, one
nular wall 54 and a ?ange 85 extending from the
end of each of which is anchored in the member
said'wall. Said ?ange carries a?lxed thereto an
88, the other end of each being anchored in a 10 internal gear I in mesh with the planets H. The
similar member 4|. Between the members 88
drum structure 53 also includes asleeve S over
and 4| the shafts 40 carry ball-bearing assem- .
lapping the sleeve P and radially spaced there
blies 42 each of which rotatably supports a planet
from to provide an annular chamber in which a
gear H. The member 89 has a sleeve P formed '
coil spring clutch C is mounted. The end coil of
integrally therewith extending in- a direction op 15 said clutch atone end abuts a step 68 formed on
posite to the sleeve end. Said sleeve is ?nished
a collar 61 rigidly secured by suitable means to
on both its inner and outer faces to provide for
the sleeve P. The other end of the spring clutch
engagement therewith of coil spring clutch and
is provided with a right-angle extension 88 which
brake devices as will be hereinafter described. ,
is secured to or otherwise engaged by a ?oating
The shaft 33 extends integrally being rotatably 20 collar 58" rotatably mounted‘ on the sleeve P.
Said collar is engageable by a plurality‘of balls
89 freely mounted for outward movement in di
agonal bores 10 extending into the face of the
bearing assembly“ carried by the member 4|.
Between said ball-bearing assemblies a drive gear
member 4|. The ball “may move radially out
G is supported on the shaft 33; said gear being in 25 ward at van angle as determined by the bores ‘III
meshing engagement with the planet gears H.
by the action 'of centrifugal force. The bores ‘III
mounted in the planet carrier 88 by a ball-bear
ing assembly 43 in themember '38 and a ball_
. The shaft 33 is provided with an enlarged CY
‘ lindrical portion adjacent the sleeve N which has
are so positioned with respect to the collar 88
that upon outward movement the balls 58 engage
the collar 88, thereby exerting force against the
an abutment 45 formed atone end'thereof. Said
abutment includes a step 45 against which the 30 end of the spring clutch in and acting to cause
the engagement of'said clutch,
last coil of a coil spring clutch ‘A abuts. ' Said
clutch includes a plurality of coils of'rectangular
An actuating member in the form of a sleeve
1| is slidably ‘mounted on the outer surface of
cross section having a radial dimension such'as to
substantially ?ll the radial space between themthe sleeve S. Said member carries a plurality of
largement on the shaft 83and the sleeve N, A 35 pins ‘I2 slidable through openings 13 in the wall
64. The pins ‘I! carry an annular plate 14 en
coil wire extension 41 on the spring clutch A pro
gageablev with the balls 89 whereby the said balls
vides a self-energizer to engage the clutch upon
relative angularmovement of the shaft 83 with
may be held against outward movement and
respect to the sleeve N :in one direction.
' ' wherebythe clutch-engaging action 'of said balls
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The spring clutch n and brake B, which have 40 is inhibited.
The sleeve ‘H is formed with an annular chan
already been described, are of the type'disclo'sed '
nel 15 in which an actuating element 15 extends.
in U. S. Patent‘ No. 2,235,266, March 18, ‘1941.
The clutch A is of the self-energizing type, being .7 Said element is carried‘ by a member 11 fixed on
the inner end of a slidable shaft ‘I8. Said shaft
effective-to transmit torque in one direction and
to overrun in the other direction,‘ The brake B 45 extends through» a bore formed in the casing l8
and provides means for'operating the controlling
in its neutral position does not transmit torque in
mechanism within the casing from the outside
either direction. It is of .thetype adapted to be
' thereof. “A ball detent mechanism 19 is engage
energized as will hereinafter be ‘described, for
transmitting torque in one direction and to over
able with any one of a plurality of recesses 85
50 formed in the shaft 18 to lock the shaft move
ment.
The brake B is carried'by vthe sleeve N; the
runin the other direction.
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end of the last coil abutting a‘ step 48 formed‘ in
a collar 49, which'is rigidly secured by suitable
means to the sleeve. The last coil ‘of the spring
brake B at the other end opposite the‘step 48 is
provided with an extension 50 which is secured to
or engaged with a pulley-likemember 5| rotata
bly mounted on the sleeve N. Said'member is
formed with a V groove 52 in its periphery en
’ gageable by a brake shoe member 53. The mem
ber 53 is carried by a pin 54 slidably extending
through a bracket 55 mounted in the wall 34. A
compression spring 55 urges the brake shoe 58
7 ' The member 11 is connected by a link 8| with
the bell crank member 58 previously referred to.
The drum structure 53 is formed as an exten
sion‘of the sleeve S with a‘ sleeve Q of smaller 4
diameter. Said sleeve is supported by a ball
bearing assembly» 82 on the shaft R; The out
side of_ the sleeve Q'ca'rries a spring brake F,
one end of the coil of said brake being seated
go against a step‘ 83 formed on a collar 84 ?xed by
- suitable means to the end of the sleeve Q. The
other end of the brake F is secured by an ex
tension 85 of the last coil to a pulley-like mem
downwardly into engagement-with the member
ber 88, which is rotatable and slidably mounted
5|. The upper end of the pin 54 is hooked over 65 on the sleeve Q. The periphery of the member
a transverse pin 51 carriedby a bell crank mem
ber 58 rockably mounted on thebracket 55.
At the rear end of the casing 16 a coupling
member 59 adapted to be secured to a propeller
shaft or other driving mechanism is'afflxed on
the. end of an output shaft R. Said shaft is ro
tatably supported by a ball-bearing assembly 60,
said bearing assembly being rigidly secured to the
casing l6 by a ?anged cap 8|, The shaft R ex
85 is grooved to receive a brake member 81.
Said member is carried by a vertical pin 88 slid
ably mounted in a bracket 89 extending from
a portion of the casing It. A spring 88 urges
the brake member 81 radially inwardly into en
gagement with the member '86. A cammed ex
tension 9| on the member 81 is engageable with
a cam face 92 formed on the sleeve 1| ‘whereby
movement of said sleeve in one direction lifts the
tends ,inwardly.theinner end being supported by 75 member 81 out of engagement, and whereby upon
2,410,991
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' movement of the sleeve in‘ the other direction the
spring 80 seats the brake member I‘! on the
member 88 thereby actuating the spring brake F
and causing its engagement.
The brake F is adapted to engage a finished
brake face T formed on a cylindrical portion 93
of the casing l6.
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which'no power is being transmitted and which
is not engaged with the sleeve 0. The “same'type
of showing is used for the clutch E for the same
purpose; also for the brake F.»
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Referring to Figure-3, low-speedop'eration will
~ now be described. With the-input shaft 33 rotat
ing in a counter-clockwise directiomthe‘ gear G
.The shaft R ls provided with a collar 94 to
is driven in the same direction and the gear H
provide abutment means: for spring clutches ~ is‘rotated' about its axis in the reverse, orclock
mounted at the sides thereof. A coil spring clutch 10 wise, direction.‘ 'This‘direction of rotation of the
D has its end coil seated on a step 85 formed on
the collar 94. The other end of said spring clutch
isprovided with a coiled wire extension 88 to
provide an automatic agitator for engaging the
gear H would'act to drive the ‘internal gear I in
the reverse, or counter-clockwise, direction. " Said
internal gear, however, is locked against counter
clockwise direction by the spring brake F. The
clutch in one direction of rotation relative to 15 gear H’and'its carrier acting against this sta
the sleeve P, said clutch engaging the inner face - tionary reaction operates in a counter-clockwise
of said sleeve.
direction. Power is then transmitted through the
A spring clutch E mounted on the shaft R has
‘sleeve P at a reduced speed ‘ratio to the output
the end of its last coil abutting a' step 91 formed
shaft R'bye'mea’n's of the self-energizing spring
on the collar 9|. The other end of said clutch 20 clutch D. This gives the low-speed‘operation,
is provided with a coil spring'extension 98 which
reaction being taken on the transmission ‘casing
provides an automatic agitator for the clutch in
it by engagement of the spring brake F with the
one direction .of rotationrrelative to the sleeve Q,
face T formed on a portion ‘of the casing. '
said clutch E being adapted to engage the inner
When operation in low speed reaches the point
cylindrical face of the sleeve Q.
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It will be noted'that a bushing 89 is provided
between the drum structure 63 and a reduced
end portion of the sleeve P. Said braking, to
_ gether with‘the ball-bearing assembly 82, centers
2s when the centrifugal force‘of the balls 69, which
act as a governorpis high enough to produce a
predetermined amount of 'drag on the exciting
ring 68 of the spring clutch ‘D, the sleeves ‘P and .8.
as above pointed out, are locked'together. The
the drum structure 63 with respect to the input 30 entire internal structure within the casing I3 is
shaft 33‘, the output shaft R, and the planet car
then driven vin a counter-clockwise direction,
rier 39.
‘
In any power-transmitting device involving v‘the
use of gearing in orderto change ratio, it is
Referring to Figure 5, when the selecting mech
anism is moved to engage the brake shoe," and
disengage the brake shoe 81, reverse speed is ob- ‘
necessary to have a reaction point in‘the-gear v35 tained. As indicated in Figure 5, with the power
train. In-the device of this invention as "above
input shaft 33 rotating in a counter-clockwise
described, there are two'reaction points on the
direction, the gear G rotates the gear H, in a
transmission casing, one being the reaction ob-v
tained by engagement of the coil spring brake B
with the sleeve 0, which is attached to the casing.
and the other being engagement of “the spring
brake F with the face T, which is carried by the
.casing. In addition to these two reaction points,
the input and output shafts may be locked to
gether, as will be hereinafter described, whereby
there is a direct drive, reaction in this case being
taken against the chassis frame by the engine
block and other associated parts.
I
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In the description of the operation of appli
cant's transmission, the; direction of rotation of
the various elements will be referred to as viewed
from the output end of the transmission; ‘that
is, from the right end of the drawings.‘ The
transmission input shaft 33 will then be driven
v a counter-clockwise direction.
'
Reference will ?rst be made to Figure 4 of ‘the
diagrammatic drawings. Neutral position‘ and
' clockwise direction. The planet carrier, includ
ing the sleeve N, is held against movement by ‘
engagement of the spring brake B with the ‘sleeve
Ov on the ‘casing. The gear H then drives the
internal gear I in aclockwise direction. I‘ The
sleeve Q energizes/the clutch ‘E'engaging' the out
put shaft B,.thereby driving said ‘shaft in a clock
wise direction whereby reverse speed is attained.
Figure 6 illustrates a neutral position in which
rotation of the power input shaft 33 merely spins
the gearing without applying any power to the ,
output shaft R except that due to frictional ‘drag
of the'oil in the transmission.’ ‘With the brake
shoes 53 and 81 both disengaged, and with the
balls 69 having no appreciable centrifugal‘ force,
‘ there ‘will be no drive engagement of the sleeves
P and Q with-the clutches D and E by‘ the output
shaft R.
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Although it is intended that the shift from low
to high speed be automatic, under certain condi
tions it is desirable to remain in low gear.v For
as the basis for the explanation.
that‘ purpose, a lock-out meansis provided. The
Direction drive will?rst be explained. With 60 ‘annular actuating element 14 may be moved by
direct drive will be ?rst described, using Figure 4
the power input shaft 33 rotating in a counter
means of the linkage illustrated to engage the
clockwise direction and' with the balls 39 thrown
balls-69 and vhold them against outward move
out by centrifugal force whereby the spring clutch
ment by centrifugal force in the bores, '10. By
C is actuated, the sleeve P will be secured tothe
this means .the transmission’ may be held in low
sleeve s for rotation therewith. The gear train G,
gear until such time as it is desired to 'permit
H, and I will therefore be held locked against
automatic ‘shifting into high gear.
.'
movement and the entire ‘structure will rotate as
In‘ order to prevent undesirable 'free wheeling
‘a unit in a counter-clockwise direction. The
or coasting,- a clutchv A is provided between the
spring clutch D will automatically be engaged
power input shaft 53 and the planet carrier.
and drive will be transmitted therethroughwto 70 When power from the outputshaft R corne'sifro‘m
.the output shaft R. at the speed of the input
the output end of the transmission through the
. shaft 33. The brake B is shown in dotted lines
‘clutch E to the planet carrier’ and vtherefrom to
in order to simplify the showing,‘ said dotted lines
‘the sleeve N, the clutch‘ A1 engages ,withvthe power
indicating the position of the clutch or brake and
input‘ shaft 33 whereby the engine brakes the
symbolizing an inactive clutch or brake through 76 overrunning action.
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2,410,921
- 7
If a vehicle in which this transmission is in
stalled is parked on an upgrade with a dead en
glue, and if the selector mechanism is set for for- _
structure, a spring clutch between the planet‘
carrier‘ and the drum structure, means to en
gage said elutch when a predetermined speed of
p'lanets‘to' turn the engine which is dead. This
the planet carrier is attained whereby direct
drive is obtained.
3. A ton including a power‘ input
shaft, a gear carried by said shaft, a planet car
rier rotatably mounted concentric with respect
‘ ‘ ‘would act as a brake and give the desired braking
to said shaft, a gear rotatably mounted on the
ward drive, no-back lock can be effected since
shaft R‘would tend to turn sleeve P by means of
clutch D in'a clockwise direction. 8 would then
I' be locked .by means ofv brake F requiring the
, action. When parked on a. down grade, the same’ 10 planet carrier in mesh with the gear on the
results may be‘ obtained by moving the selector _ shaft, a rotatable drum structure having an in
ternal gear in mesh with said planet gear, an
mechanism to a reverse position. 7
_It is to be understood that only a preferred
embodiment has been illustrated showing ‘appli
output shaft mounted concentric with respect to
the power input shaft, ahousing structure which
cant's use of spring clutches in connection with 15 carries all of said mentioned elements, a one-way
engaging brakepositioned between the planet
a planetary transmission. It isto be» understood
that 'said transmission may take varied forms
and modifications, and that applicant limits his
claim to invention only by the scope ,of the ap
pended claims .
h
Whatisclaimedis:
a
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_
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carrier and the housing structure, a one-way en
gaging clutch between the output shaft and the
planet carrier, a one-way engaging clutch be
tween theoutput shaft and the drum structure
with the internal gear and a one-way engaging
brake positioned between said drum structure
1. A transmission including a housing struc-'
ture, a ‘power input shaft rotatably carried by the
and the housing structure, manual means for
engaging and disengaging the brakes between
housing structure, a gear fixed to said shaft, a
planet carrier rotatably mounted concentric with 25 the housing structure and the planet carrier and
respect to said shaft, a gear rotatably mounted
the_drum structure, said clutches between the
input shaft and the planet carrier, between the
on the planet carrier in mesh with the gear on
output shaft and the planet carrier and between
the shaft, a rotatable drum structure having an
the output shaft and the drum structure being
' internal gear in mesh wtih said planet gear, an
. output shaft rotatably carried by the housing 30 automatically engageable in one relative direc
tionof rotation and freely overrunning, in the
structure concentric with respect to the power
other relative direction of rotation, a one-way
input shaft, a one-way clutch- carried by the
engaging clutch between the planet carrier and
' power input shaft and engageable with the planet
the drum structure, and automatic means to en
carrier, a brake carried by the planet carrier and
gage said clutch when a predetermined speed is
‘engageable withthe housing structure, a one‘
attained on the planet carrier whereby direct
way clutch carried by the output shaft and en-'
drive is obtained, manual means being provided
gageable with the planet carrier, a one-way clutch
for rendering said automatic means inoperative.
carried by the output shaft and ensaseable with
4. A, transmission ‘including a power input
the drum structure, a one-way brake carried'by
the drum structure and engageable with the 40. shaft, a gear carried by said shaft, a planet car
rier rotatably'mounted concentric with respect to
housing structure, manual means for engaging
said shaft, a gear rotatably mounted on the plan
'and disengaging the brakes between the housing
et carrier in mesh with the gear on the shaft, a
structure and the planet carrier and the drum
rotatable drum structure having an internal gear
structure, said‘clutches between the input shaft
and the planet carrier, between the output shaft “in mesh with said planet gear, an output shaft
mounted concentric with respect to the power
and the planet carrier and between the output
shaft and the drum structurebeing automatically
input shaft. a housing structure which carries
engageable in onerelative direction of ‘rotation
all of said mentioned elements, a coil spring
and freely overrunnlng in. the other relative
clutch pontioned between the power input shaft
direction of rotation, a one-way clutch carried by '50 and the planet carrier. a one-way engaging
the planet carrier and engageable with the drum
brake positioned between the planet carrier‘ and
structure. and automatic means to engage said
the housing structure, a one-way engaging clutch
clutch when a predetermined speed of the planet
between the output shaft and the planet carrier,
carrier is attained whereby direct drive is ob
a one-way engaging clutch between the output
tained, manual means being provided for render “ shaft and the drum structure with the internal
ing said automatic means inoperative.
gear and a one-way brake positioned between
2. A transmission including a power input
said drum structure and the housing structure.
shaft, a gear fixed to said shaft, a planet carrier
manual means for engaging and disengaging the
rotatably mounted concentric with respect to
brakes between the housing structure and the
' said shaft, a gear rotatably mountedon the plan ‘a planet carrier and the drum structure, said
et carrier in mesh with the gear, on the shaft,
clutches between the input shaft and the planet
{a rotatable drum structure having an internal '
carrier, between the output shaft and the planet
‘gear in mesh with said planet gear, an output
carrier and between'the output shaft and the
' shaft mounted concentric with respect to the
drum structure being automatically engageabie
power input shaft, a housing structure which 66 in one’relative direction of rotation and freely
carries all ‘of said mentioned elements, a coil
overrunning in the other relative direction of‘ ro
spring brake positioned between the planet car
tation, a one-way engaging clutch between the
'rier and the housing structuraa coil spring
planet carrier and the drum structure, and autm
clutch between the output shaft and the planet
matic means to engage said clutch when a pre
'carrier, a coil spring clutch between the output 70' determined speed is attained on the planet car
shaft and the. drum structure, a coiled spring
rier whereby direction drive is obtained, manual
brake positioned between said drum structure‘ and
means being provided for rendering said auto
the housing structure, ‘means for engaging and
matic means inoperative.
disengaging the spring brakes between the hous
5. A transmission including a power ‘input
ing structure and the planet carrier and the drum 76 shaft. a gear fixed to said shaft, aplanet carrier
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i'otatably'ni'ounted concentric 'withrespect to said
“ shaft, a gear rotatably mounted on‘the planet
carrier in mesh with the gear-fen‘ the shaft, a
rotatable drum structure having ‘an internal gear
, in mesh with said planet gear, an output shaft
mounted concentric with respect to the power
‘ input ‘shaft, a housing~ structure whichcarries
’ on the planet carrier, a’one-way brake interposed '
between said sleeves, saidbrakeibeing manually
disengageable, said planet earrierbeing provided
with a second'sleeveoverlying a portion of the
output shaft, a one-way clutch interposed be- ’
tween said; sleeve, and said output shaft, said
‘clutch jbeing'automatically engageable during‘
relativerotation offthe sleeve. andthe shaft in
’ all: of said mentioned, elements, a, coil spring
clutch positioned between the power'input ‘shaft
and the planet carrier, "a coil spring brake posi
' tioned between the planet carrier‘ and the hous
ing structure,"a coil spring ‘clutch ‘between the
output shaft and the planet carrier, a coil spring
clutch between the voutput shaft and the drum
structure, a coiled, spring brakepositioned be
.v 1.710 ,1
in overlying relation with respectto said sleeve , - i
one ‘directionjsaidndrum structurebeing provided -
_ with ajsleeve overlyingand spaced ‘from said
second, sleeve on the planet carrier, a self-engag- ,
ing spring clutch device interposed between said
sleeves, fine'ans, for rendering ,saidclutch means
inoperative, said. casing being provided with} a
15
‘ tween said drum structure and the housing struc
, sleeve extending over" the outputshaft in ' spaced
ture, manual means for engaging and disengag
relationwith respecttheretqsaid drum-struc- '
ing the spring brakes between the housing struc
ture being provided’ with'a second sleeve extend
‘ture andv the planet carrier and the drum‘ struc
" ing between said, outputshaft and said second
ture, said‘spring clutches between the input shaft '3 sleeve on the 'casin'gand being radially spaced
and the planet carrier, between the output shaft
shaft and the drum structure being automatically
engageable in one relative direction of ‘rotation
from each of said elements, a one-waybrake in
terposedlbetween the second sleeve ofthedrum
‘structure'andlthe' second sleeve of the casing,
manually operable. means for ‘disengaging said
'and freely- overrunning vin the otherrelative I di
rection of rotation, a spring clutch‘ between the
._ second‘ sleeve on ‘,the ‘ drum ' structure and _. the
and the planet carrier and between the ‘output
brake,fa one-way, clutch interposed between said
power'output shaft, said clutchxbeing provided
with means for automatically engaging the» clutch
planet carrier'and ‘the drum structure, automatic
means to engage‘s'aid clutch‘ when a predeter
mined speed of the planet-carrier is attained
whereby direct drive is‘ obtained, ‘manual means
upon relative angular.’ movement of theshaft and .
30
being provided for rendering said automatic ,
means inoperative.
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,
,
_
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the'sleeve‘in one direction. _. >
8,.A power transmission deviceincluding av
casing, a ‘power input shaft journaled- in said
.
6. A‘ transmission including a housing struc
casing, aconcentrio power output shaft journaled
ture, a power>input shaft rotatably carried by
in the casing, a planet carrier assembly journaled ,
the casing, a gear ?xed tosaid shaft, 'a‘ planet 35 on said input ‘and, said output shafts, a drum
carrier rotatably'mounted on the planet carrier
structure journaledon said planet carrier and on
in mesh with the gearlon the shaft, a rotatable
said outputtshaft, said planet carrier including
drum structure havingan'internal ‘gear in mesh
a sleeve overlying a portion .of‘ the-input “shaft,
with said planet gear, an output shaft rotatably
a spring clutch; interposed between saidvinput
carried‘ by the'casing ‘concentric with respect ‘to 40 shaft and said sleeve, said casingebeingl provided .
the power input shaft,>a coil spring clutch car
with a sleeve extending in overlying relation with
.ried by the power input shaft and engageable with
respect to said sleeve on the planet carrier, a one
the planet carrier, a coil spring brake carried
way brake interposed between said sleeve on the
by the planet carrier and engageable with the
planet carrier and said sleeve onthe casing, said
housing structure, a coil spring clutch carried 45 brake being manually disengageable, said planet
by the output shaft and engageable' with the -_ carrier being provided with a second sleeve over
planet carrier, a coil spring clutch carried by the
lying a portion of the output shaft, a one-way '
output shaft and engageable ‘with the'drum struc
clutch interposed between said sleeve and said
ture, a coiled spring brake carried by the drum
output shaft,.said clutch being automatically en‘
- structure and engageable with the housing struc
ture, manual means for engaging and disengag
50 g'ageable during relative rotation of the sleeve and
ing the spring brakes between the housing struc
ture and the planet carrier and the drum struc
ture, said spring clutches between the input shaft
the shaft in one direction, said drum‘ structure
being provided with a sleeve overlying and spaced
from\said second sleeve on the planet carrier, a
spring clutch device interposed between said
and the planet carrier, between the output shaft 55 sleeves, centrifugal operating means for actuating
and the planet carrierand between the output
said spring clutch, means for rendering said
centrifugal means inoperative, said casing being
shaft and the drum structure being automati
provided with a sleeve extending over the output
cally engageable in one relative direction of rota
tion and freely overrunning in the other relative
shaft in spaced relation with respect thereto, said
direction of rotation, a spring clutch carried‘ by 60 drum structure being provided with a second '
the planet carrier and engageable with the drum
sleeve extending between said output shaft and
structure, and automatic means to. engage said
clutch when a predetermined speed at the planet
carrier is attained whereby direct drive is ob
tained, manual means being provided for render 65
ing said automatic means inoperative.
'
said second sleeve on the casing. and being
radially spaced from each of said elements, a one
way brake interposed between the second sleeve
of the drum structure and thesecond sleeve of
the casing, manually operable for engaging said
brake, a one-way clutch interposed between said
7. A power transmission device including a cas
second sleeve on, the drum structure and the
ing, a power input shaft Journaled in said casing,
power output shaft,'said clutch being. provided .
a concentric power output shaft'iournaled in the
casing, a planet carrier assembly journaled on 70 with means for automatically , engaging the '
clutch upon relative angular movement of the
said input and said output shafts, a drum struc
shaft and the sleeve in one direction, and manual
ture journaled on said planet carrier and on said
control means including linkage connecting the
output shaft, said planet, carrier including a
manually operable clutches and the centrifugal
sleeve overlying a portion of the input shaft, said
casing being provided with a sleeve extending 75
operating means.
,
I
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~
'
11
“10,921
12
9. A power transmission device including a cas
ing, a power input shaft iournaled in said casing,
in the casing, a planet carrier assembly iournaled
on said input and said output shafts, a drum
structure journaled on said planet carrierand on
said output shaft,‘said planet carrier including a
sleeve overlyinc a portion of the input 8118“. a
spring clutch interposed between said input shaft
and said sleeve‘, said casing being provided with
'a sleeve extending in overlying relation with re
a concentric ‘power outputshait Journaled in the ‘
casing, a planet ‘carrier assembly iournaled ‘on
‘ ‘said‘inp'ut and'sald output shafts, a drum struc
ture iournaled on said planet carrier and on said
output shaft,‘sal'd planet carrier including a sleeve
overlying a portion of the input shait', said casing
being provided with a sleeve extending in over- '
lying relation with respect to said‘ sleeve on the
planet carrien'a spring brake interposed between I
7 spect to said sleeve on the planet carrier, a spring
brake interposed between said sleeves, said brake
being manually engageable, said planet carrier
‘said' sleeve, said brake being manually 'disen
‘7 v‘being provided" with a second sleeve overlying a‘
', portion‘of the output shaft,‘a'spring clutch inter
posed between said sleeve and said output shaft,
shaft.‘ ‘a spring clutch interposed between said is said clutch being automatically engageable during
1 sleeve and said output shaft, said'clutch being au
relativefrotation oi’ thesieeve and the shaft in
> tomatlcally engageable during relative ‘rotation of > one direction, said drum structure being provided
, 'gageable, said planet carrierbeing provided'with
a“ second sleeve overlying a portion of‘the output
Jthe'sleeve and thershai't in ‘one direction, said
with a sleeve overlying and spaced from said sec
'- drum structure being, provided with a sleeve over
ond sleeve" on ‘the planet carrier, a spring clutch
; lying and spaced‘i'rom said‘second sleeve on the 20 device interposed between said sleeves, centrifu
planet carrier, aself-eng’aging spring clutch‘de
gal means for engaging said clutch and manual
‘ vice interposed between‘ said ‘sleeves, means‘ for
means for rendering said, centrirugal means in
‘rendering said clutch means inoperative, said cas
operative, said casing being provided with a sleeve
ing being provided with a- sleeve extending vover
extending over the output shaft in spaced rela
the‘output shaft in spaced relation with respect 25 tion with respect thereto, said drum structure be
theretdsaid drum structure-being provided with
ing provided with a second sleeve! extending be
a second sleeve ‘extending between said output
tween. ‘said output shaft and said second sleeve
‘shaftand said second sleeve on the casingand
on the casing ‘and beingradiallyspaced from
being radially§spacedfrom each of said elements,
each of said elements, a spring brake interposed
va spring brake’interposed' between the second 80 between the second sleeve of the drum structure
sleeve of the drum structure "and" the second
and the second sleeve‘ of the casing, manually
sleeve of the casing, manually operable means
operable means for engaging said brake, a spring
for disengaging said brake, a clutch interposed
clutch interposed between‘ said ‘second sleeve on
‘between said second sleeve on the drum structure
the drum structure and the power output shaft.
and the power output shaft, said clutch being 35 said clutch being provided with means for su-'
provided with means for automaticallylengaging
tomatically engaging the clutch .upon relative
the clutch upon relative angular movement of
angular movement oi'the shaft and the sleeve in
"the shaft and the sleeve in one direction. '
"10. A power; transmission ‘devicefjincluding a
onedirection, and manual control means includ-'
ing , linkage connecting ‘the manually _ operable
caslnl.‘ a power‘input : shaft Jo'urnaled in said 40 clutches and the centrifugal operating means.
casing; a concentric power output shaft Journaled
,
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‘
RANK W. AVILA.
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