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Патент USA US2133276

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Oct. 18, 1938.
R. L. BALLANTYNE
2,133,276
POWER TRANSMISSION
Filed Got. 16. 1935
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2 Sheets-Sheet l
Oct. 18, 1938.
2,133,276
R. L. BALLANTYNE
POWER TRANSMI SS ION
Filed Oct. 16. 1935
2 Sheets-Sheet 2
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2,133,276
Patented Oct. 18, 1938
UNITED STATES PATENT OFFICE
#,ISS’NI
POWER TEANBHISBIûN
`
Robert L. Ballanfylle. l'erl'ylblll‘t. Gillo
Application october 16, 1935, Serial No. 45.281
lclnllnl.
This invention relates to variable speed power carried by an enlarged portion i8 of the casing
transmission apparatus and is more particularly
directed to transmission mechanism for transmit
ting power from a driving shaft to a driven shaft.
s
An object of the invention is the provision of a
simplified variable speed power transmission of
this character which is efficient in operation and
simple in construction.
The invention contemplates means to vary the
lo driving relation between the driving and driven
shafts so that the speed of the driven shaft with
respect to the driving shaft is varied in response
to the load resistance.
A further object of the invention resides in the
16 provision of a substantially unitary hydraulic
clutch and gear arrangement for varying the
driving ratio between the driving and driven
shafts.
Further objects and advantages are within the
20 scope of this invention such as relate to the ar
rangement, operation and function of the related
elements of the structure. to various details of
construction and to combinations of parts, ele
ments per se, and to economies of manufacture
26 and numerous other features as `viii be apparent
from a consideration of the specification and
drawings of a form of the invention, which may
be preferred. in which:
Figure 1 is a fragmentary detail sectional view
3° illustrating the invention as incorporated for use
with an internal combustion engine for automo
tive vehicles;
Figure 2 is an enlarged fragmentary detail view
of a portion of the mechanism shown in Figure i:
Figure 3 is a sectional detail taken substantial
lyonallnel-lofli’lgurei:
Figure 4 is a sectional detail taken substantial
lyon alinel-lofl’igure 1;
40
Figure 5 is a sectional detail taken substantial
ly on a line l-l of Figure l;
Figures 6, 'l and 8 are diagrammatic illustra
tions of other forms of the invention.
The invention has been illustrated as incor
45 porated for use as a power transfer mechanism
between internal combustion engines and propel
ler or drive shafts of automotive vehicles, but it
is to be lmderstcod that I contemplate its use
wherever the same may be found to have utility.
50
Referring to the drawings and particularly Fig
ures i to 5 thereof, a form of the invention which
may be preferred, has been illustrated wherein
55
I0, and has a rotatable member or flywheel 2l
keyed or otherwise secured thereto as at Il. Fly
wheel Il may be of the usual form or may be a
disc of desired weight to which is preferably re- 6
movabiy secured a casing 2l of comparatively
light weight material as for example sheet metal.
Buitably Journalled on extension Il adjacent the
flywheel 2l, is a casing Il which is capable of ro
tation with respect thereto. Within casing 2l is 10
a gear or rotor Il having internal teeth Ill. the
rotor Il being suitably secured to the extremity of
extension Il for rotation therewith. In mesh
with teeth Il of gear n are the teeth Il of an
idler or driven gear I! winch is mounted upon a 1
shaft 34 carried by sn end or head portion Il of
the casing Il.
Head II is formed with an in
wardly extending projection Il of crescent shape
which divides the casing into two sections. The
head as is provided with n splines opening n 2°
within which is positioned s. shaft I2 axially
aligned with extension Il of the crankshaft l2.
As particularly shown in Figure B, the casing
Il is formed with enlarged chamber portions 4l
and Il between which is positioned a wall 4l
having an opening Il therein communicating
with chambers ll and 4l. Projecting through
the wall I8 substantially at right angles to the
opening Il is a valve member I2 slidably mounted
in an opening Il. Valve l! is formed with an 3°
opening therethrough or may be slotted as at Il
providing a passage between chambers Il and
Il when the slot l0 is in register with the open
ing Il. A resilient member or spring Il is posi
tioned between the casing 2l and valve l! which a5
tends to hold the latter in open position. or so
that slot Il cooperates with opening Il.
Each of the casings 24 and 2l is adapted to
hold fluid such as oil or the like, the outer cas
ing Il serving as a reservoir to supply fluid to ‘n
casing 20 as will hereinafter appear.
"I‘heiiuidincasingßiscirculatedthroughthe
spaces between the rotor 2l, idler 32 and head 8|
upon rotation of the rotor ‘Il and thus idler ll. ¿s
the fluid passing through valve I! when in open
position. due to the meshing of teeth Il and Il
which force the huid into chamber Il when the
rotor is driven in a clockwise direction as viewed
in Figure 3. ‘when valve l! is closed however. 50
the circulation of :luid ceases and the mechanism
becomes in effect a unitary structure and casing
sninternal combustion enginecasing "supports
llbeingfreeuponextension Ilisdrivenbyand
a crank shaft I! formed with an extension il.
rotates with the rotor 2l. Thus the ftuid becomes
a Vcushion between the casing, rotor and idler and ß
Il is suitably Journalled'in abearing Il
9,183,276
a substantially positive drive is provided between
crank shaft I2 and driven shaft 42.
The mechanism thus far described simulates a
rotary pump structure wherein the rotor 28 is
driven by the engine crank shaft I2, the casing
28 serving as a power transfer to a driven shaft
42 through the medium of the idler gear I2 which
meshes with the teeth oi' the rotor and which is
locked thereto when the valve I2 is closed to
10 stop the free passage of fluid through chambers
4I and 44. This arrangement is in effect a ñuid
clutch serving as a means for coupling together
of the driving and driven shafts as will herein
after appear.
Casing 24 is provided with a plug 21 which is
removable for the injection oi’ iluid to the interior
of the casing to compensate for any leakage or
waste. In order that the fluid. preferably an oil
of desired quality may be supplied to casing 24.
openings II and II are provided in casing 2I ad
jacent chambers 44 and 4I. Within openings 28
and Il are valve mechanisms II and I! provided
with seats I1 and 88 to receive the head portions
of valves 4I and 4I. Each member I2 and It
is formed with an extended portion 4S of scoop
shape which serves to "pickup" the oil as casing
24 rotates. the suction created in chamber 44
being sumcient to open valve 4I when the casing
is rotating clockwise. or in chamber 4I to open
valve 4I when the casing is rotating counterclock
wise, as viewed in Figure 3. Such an arrangement
maintains the desired supply of fluid in the cas
ing 24.
In axial alignment with shaft 42 is a shaft I2
suitably journalled in a bearing I4 carried by a.
convenient bracket 8E. Shaft I2 is provided with
a reduced portion II adapted to be received within
an opening Il provided in the end of shaft 42.
The other end of shaft I2 extends into a casing
I1 which contains a reverse gear mechanism of
suitable form. ‘I'he gearing in casing 61 is pro
vided with a connecting element I8 forming a
part of a universal joint or other suitable con
nection to a propeller or drive shaft 1li which in
turn is suitably connected to the driving wheels
of the vehicle (not shown).
In order that shaft 82 and thus shaft 1Il may
be driven at a low speed a differential mechanism
is provided which may be driven through the
medium of gear 12 carried by the stub shaft I4
driven by the idler gear I2. The differential has
been illustrated as including a ring 14 driven by
means of gear 1I formed integral therewith or
suitably secured thereto. Ring 14 carries a plu
rality of pinions 1I which are mounted in any
suitable manner upon stub shafts 19. The pin
ions 18 are in constant mesh with bevel gears
I2 and I4 mounted respectively upon shafts 42
and I2 and adapted for rotation therewith. Thus
shaft I2 is capable of being rotated either through
shaft 42, gear 82, pinions 1I and gear 84 when
valve I2 is closed and casing 28 is rotating, or
through gears 12 and 1I. ring 14, pinions 1B and
gear I4, when valve 52 is open and casing 26 is
substantially stationary, or through both oi' these
sets of gearing as will hereinafter appear.
Although a bevel gear type of differential mech
anism has been chosen for illustration it is to be
understood that planetary gearing may be uti
70 lized, in which event, a sun gear could be sub
stituted for the bevel gear 82, planet gears for
the pinions 1I and an internally toothed ring
gear for the bevel gear I4. If such an arrange
ment is utilized gear 12 on stub shaft I4 would
75 be one of the planet gears.
In order that the ring 14 and thus shaft I2 may
be selectively driven by gear 12. a form of man
ually operable control has been illustrated in
Figures l, 2 and 4. suitably carried upon an
external cylindrical surface of casing 24 is a
ring I0 slidable with respect thereto in a suit
able manner, such as by means of a yoke mem
ber II. pivoted as at 8l. A split ring I8 is con
nected to the enlarged extremities II 'of the yoke
II through the medium of pins I1 provided on 10
ring II which is positioned in a slot II’ in ring
III. ‘Thus by rocking the yoke II upon pivot 95,
ring II and thus ring III are moved longitudinally
upon the casing 24. Ring III is suitably pinned
or otherwise secured as at II to an internal ring
II, slots I2 being provided in the casing 24 to
permit movement of the connecting elements 88
with respect to the casing. Rings III and II are
of sufficient width to cover slots I2 throughout
their full range of movement and thus prevent
the escape of oil from casing 24.
Ring II is formed with an annular proiection
III which is engaged by a roller III carried by
an extension H8 on valve member I2. Valve l2
is adapted to be held in open position by means 25
of spring Il which also serves to continuously
urge roller III into engagement with projection
I I8. Thus manipulation of ring I8 and thus ring
90 moves valve I2 into and out of open position.
Av governor or automatic control has also been
provided to operate valve I2 and may take the
form of a pivoted member |24 provided with a
weight I2I adjacent its outer extremity and a
gear sector |24 on its inner extremity. Member
|24 is pivoted at |21 between the weight |25 and
sector I2I to a suitable bracket I2I formed on
casing 24. The teeth III of sector I2I are in
engagement with teeth III provided in the valve
52. Thus rotation of casing 28 will affect the
position of weight |28 and vary the position of
valve I2, and as casing 28 increases in speed. the
centrifugal force causes valve I2 to move toward
closed position.
The arrangement is such, that when it is de
sired to apply direct drive to the shaft 1I through
shaft 42, the valve 52 is closed so that the rotor
28, idler I2 and casing 28 rotate as a unit. Thus,
ring III is moved to the extreme left as viewed in
Figure 2 or into direct drive position and roller
IIB rides upon surface IIS of the ring_8|l which 50
maintains the valve I2 in closed position. When
it is desired to return the elements to neutral
position, ring III is manipulated so that surface
IIS moves away from roller III and spring 5I!
moves valve 82 into open position, permitting idler 55
gear 82 to rotate shaft I4 and impart rotation
to ring 14, shaft 1I becoming free.
Low gear is obtained when ring Il is in the
position illustrated in Figures 1_ and 2. Thus ro
tation of crank shaft I2 rotates the rotor 2B and
idler I2 on shaft I4. The shaft I4 in turn drives
gear 12, and as the driven shafts 62 and 1I are
stationary, gear 12 will start to walk around gear
1I. As valve I2 moves toward closed position
the resistance between rotor 28 and idler I2 in 65
creases and gear 12 applies additional driving
force to gear 1I and ring 14. Shaft 42. being
driven by the casing 28, imparts motion to bevel
gear I2 in the direction of rotation of casing 2B.
Gear I4, being ?xed upon shaft I2 is also sta 70
tionary and thus the ring 14 starts to rotate due
to its connection to pinions 1I which are driven
in this instance, by bevel gear I2. Gear 12 will
tend to rotate ring 14 faster than it is being ro
tated through bevel gear 82, with the result that 75
3
the bevel gear 54 and shaft 52 are rotated in the
direction of rotation of the crankshaft i2. The
resultant effect of the increased speed of the gear
12 and the rotation of casing 25 is to drive the
differential mechanism with increasing speed
which is in turn imparted to the driven shafts 52
and 15. It is to be noted that during this driving
action, casing 25 and the differential mechanism
are rotating and gear 12 tends to drive the differ
10 entiai faster.
It is to be further noted that'in addition to the
walking action of gear 12 around gear 15 that
although valve 52 is initially in open position.
the opening restricts the fluid ñow sumciently to
lli drive the casing 25 slowly in the direction of
crank shaft rotation. Thus throughout the op
eration of the above mechanism the same is being
rotated substantially as a unit although there
is relative movement between the several ele
20
ments, during various periods of operation. This
arrangement adds materially to the flexibility of
the device, much of the shock of initial move
mont of the driving action being eliminated, and
tends to reduce materially the “back lash" present
25 in conventional transmissions.
Direct drive is obtained either manually or
automatically by closing valve 52 through the
movement of ring 55 toward casing 25 or by the
centrifugal force upon the weighted sector |24.
30 Thus motion is initiated by means of the rotation
of ring 14 and as the load decreases the valve
52 may be closed either manually or automati
cally to drive shaft 52 directly from shaft |4
through the casing 25.
To reverse the direction of the driven or pro
peller shaft 1li, a reverse gear mechanism of con
ventional form may be utilized in which instance
shaft 52 is preferably driven in the manner above
described in connection with low gear.
40
In the form of the invention above described
the arrangement is such that the idler gear 52 is
connected to the ring 14 while the casing 25 is
connected to the bevel gear B2.
However. a num
ber of other driving connections may be made
and several arrangements have been illustrated
in Figures 6, 7 and 8. In Figure 8, a flywheel |5|
which may be the conventional iiywheel of
In Figure 'I the diiferentiai mechanism is posi
tioned after the pump structure and thesrrange
ment differs from that shown in Figure 6 in that
a ily wheel |55 rotates shaft |5| to which is
suitably keyed a gear |52 and bevel gear |15. A
driven shaft |55 is journalled in the end of shaft
|5| and carries a second bevel gear |1I. Associ
ated with the gevel gears |15 and |1| are pinion
gears |15 carried by a ring |14 which is externally
toothed as at |15. Connected between gear |52
and ring |14 is a pump arrangement which pref
erably includes outer casing |54 secured to a sup
port to hold the casing stationary. Within eas
ing |55 is a casing |55 suitably supported for
rotation therein on shafts |55 and |51. Shaft |55 16
is provided with a gear |55 in mesh with gear
|52 and a rotor |55 forming a part of the pimp
structure. Casing |55 is freely mounted on shaft
|55. and may be rotated therewlth or with re
spect thereto as will hereinafter appear. A second
shaft |51 is preferably splined to the casing |55
and carries a gear |15 in mesh with the teeth |15
of ring |15. Thus, driven shaft |55 may be ro
tated either through the bevel gear |1l, pinions
|15. ring |14, gear |15, casing |55, gear |55, gear
|52 and driving shaft |5|. or through the diner
ential mechanism and drive shaft |5|. In this
arrangement two units of the pump structure are
utilized. the idler gear of the pump serving as
the locking means between the casing |55 and
rotor |55 as described in connection with Fig
ure 6.
.
The arrangement shown in Figure 8 is inclusive
of a pump and differential mechanism similar to
that shown in Figures lto5. Thering |55however,
being formed with an internal gear |55 with
which meshes a gear |51 on an idler gear shaft
|55. In this form of the invention shaft |50
carries a planetary gear mechanism provided with
a clutch and a brake mechanism. Thus a driven
shaft |52 is rotated in one direction through a
sun gear |55 nxed to shaft |50, planet gears |54
carried by a brake housing |55 and operative ele
ments |55 carried by the shaft |55. A clutch
plate |55 carried on shaft |52 is provided with
friction disc |5| for engagement with the sun
and planet gears |55 and |54. Such an arrange
an internal combustion engine, is illustrated as ment. with clutch engaged, stops the sun and
driving a bevel |55 through the medium of a planet gears and the ring |55 is rotated therewith
60 shaft |55. Bevel gear |55 forms a part of a dif > which in turn rotates shaft |52. When the clutch
ferential mechanism including a bevel gear |51 is disengaged and the brake on, the planet gears
pinions |55 and ring |4I having an external rotate around the sun gear to drive the ring gear
toothed portion |45. In this form oi' the inven
and shaft |52 in a direction opposite to that of
tion the pump structure is mounted adjacent the shaft | 55. With both the brake off and clutch
55 driven shaft |45. and the exterior casing |41 is disengaged the planet gears will rotate about the
maintained stationary by securing the same to a sun gear and within the ring gear without driving
suitable support. Casing |55 is carried by shaft the latter.
|5| keyed or otherwise secured to rotor |52 and
From the foregoing description it is to be noted
shaft |55 splined to the casing |55. On the outer that a number of arrangements may be utilized
60 end of shaft |5| is secured a gear |55 for engage
without departing from the spirit of the inven
ment with the teeth |45 of ring |4|. Shaft |55 tion and that I contemplate a transmission mech
carries a gear |51 in mesh with a gear |55 on
anism wherein a fluid pump or clutch is con
shaft |45.
nected to differential gearing so that any one of
Thus, shaft |55 may be driven through the the clutch units such as the rotor, idler or case
05 medium of shaft |55, bevel gear |55. pinion |55,
cooperated with any one of the diiferential units
bevel gear |31 when the pump is locked in a such as the two bevel gears or ring gear to drive
manner described in connection with Figures 1 the same as herein set forth.
to 6 to provide a direct drive. When it is desired
It is apparent that, within the scope of the
to drive shaft |45 at low speed the drive is through invention, modifications and different arrange
70 bevel gear |55, bevels |55, ring |4|, gear |55, ro
ments may be made other than is herein disclosed.
tor |52,casing |55, gear |51 and gear |59. In this and the present disclosure is illustrative merely, 70
instance a pump idler gear is not utilized except the invention comprehending all variations
to control the rotation of casing |5I| either permitting the casing to rotate freely or drive the
76 same by locking the rotor |52 to the casing.
thereof.
What I claim is:
‘
1. In a power transmission. the combination
4
2, 188,276
of a rotatable housing; a drive shaft terminating
therein; a casing mounted on said shaft for rota
tion thereon: a gearwithin said casing and fixed to
said shaft ; an idler gear in mesh with said gear;
a shaft adapted to be driven by said casing; dif
ferentiai gearing between said idler gear and said
driven shaft; and means to vary the speed of said
driven shaft.
2. In a power transmission, the combination
10 of a rotatable housing; a drive shaft: a casing
mounted on said shaft for rotation thereon; ñuid
in said housing and said casing; a gear within
said casing and ?xed to said shaft; an idler gear
in mesh with said gear; a shaft adapted to be
15 driven by said casing; differential gearing be
tween said idler gear and said driven shaft; and
means to control the circulation of ñuid in said
casing to vary the speed of said driven shaft.
3. A power transmission including a rotatable
housing, a drive shaft; a casing carried by said
drive shaft; a driven shaft connected to said cas
ing; iiuid controlled gearing in said casing and
associated with said drive shaft; diñ‘erential gear
ing associated with said driven shaft; and means
to control the circulation of fluid in said casing to
vary the driving relation between said drive shaft
and said driven shaft through said fluid con
on said drive shaft within said casing; an idler
gear in mesh with said gear; fluid in said casing;
differential gearing adjacent said casing; means
to drive said gearing from said casing and from
said idler gear; and means to vary said driving
relation by regulating the flow of fluid _in saidy
casing.
6. In a power transmission, the combination of
a drive shaft; a casing mounted for rotation on
said shaft; a gear within said casing and rotat
able with said shaft; an idler gear in mesh with
said gear; fluid in said casing and surrounding
said gears; a shaft adapted to be driven by said
casing; differential gearing between said idler
gear and said driven shaft: and means to vary the 15
speed of said driven shaft by regulating the flow
of ñuid in said casing.
7. In a power ton. the combination
of a housing: a drive shaft; a casing mounted on
said shaft for rotation thereo ; fluid in said 20
casing; a gear within said casing and fixed to
said shaft; an idler gear in mesh with said gear:
a shaft adapted to be driven by said casing; dif
ferential gearing between said idler gear and said
driven shaft; planetary gearing associated with
said driven shaft; a second driven shaft: and
means to change the direction of rotation of said
second driven shaft.
trolled gearing.
4. In a transmission mechanism the combina
tion of a driving shaft: a driven shaft; a casing
adapted to contain a fluid; an internal gear in
said casing and secured to said driving shaft; an
idler gear in mesh with said internal gear; and
differential gearing connected to said internal
gear and said idler gear means to control the
circulation of fluid in said casing to drive said
driven shaft through said idler gear and said
casing.
5. In a power transmission, the combination of
.
8. In a power transmission, a housing; a drive
shaft; a rotatable casing; a rotary gear train in 80
said casing; diñ’erentiai gearing associated there
with; a plurality of shafts connecting said gear
train to said dlñerential gearing: a driven shaft;
mea‘ns to drive said driven shaft through said
differential gearing by one or more of said shafts;
a planetary gear train cooperating with said
driven shaft; a second driven shaft; and means
to change the direction of rotation of said second
driven shaft.
'
ROBERT L. BALLAN‘I'YNE.
40 a housing; a casing rotatable within said housing;
a drive shaft; a driven shaft; an internal gear
CERTIFICATE OF CORRECTION .
October 1B, 1958.
Patent No. 2,155 ,276.
ROBERT L. BALIAN'I‘YNE.
It 1s hereby certified that error appears in the printed specífication`
of the above numbered patent requiring correction as follows; Page 5, second
column, line 8, for "gevel" read bevel; page LL, first column, line 55,
claim Il, strike out the word "and" and insert the same before "means",
line 55, same claim; and that the said Letters Patent should be read with
this correction therein that the same may conform to the record of the case
in the Patent Office.
Signed and sealed this 10th day of January, A. D. 1959.
Henry Van Arsdale
(Seal)
10
Acting Commissioner of Patents.
40
4
2, 188,276
of a rotatable housing; a drive shaft terminating
therein; a casing mounted on said shaft for rota
tion thereon: a gearwithin said casing and fixed to
said shaft ; an idler gear in mesh with said gear;
a shaft adapted to be driven by said casing; dif
ferentiai gearing between said idler gear and said
driven shaft; and means to vary the speed of said
driven shaft.
2. In a power transmission, the combination
10 of a rotatable housing; a drive shaft: a casing
mounted on said shaft for rotation thereon; ñuid
in said housing and said casing; a gear within
said casing and ?xed to said shaft; an idler gear
in mesh with said gear; a shaft adapted to be
15 driven by said casing; differential gearing be
tween said idler gear and said driven shaft; and
means to control the circulation of ñuid in said
casing to vary the speed of said driven shaft.
3. A power transmission including a rotatable
housing, a drive shaft; a casing carried by said
drive shaft; a driven shaft connected to said cas
ing; iiuid controlled gearing in said casing and
associated with said drive shaft; diñ‘erential gear
ing associated with said driven shaft; and means
to control the circulation of fluid in said casing to
vary the driving relation between said drive shaft
and said driven shaft through said fluid con
on said drive shaft within said casing; an idler
gear in mesh with said gear; fluid in said casing;
differential gearing adjacent said casing; means
to drive said gearing from said casing and from
said idler gear; and means to vary said driving
relation by regulating the flow of fluid _in saidy
casing.
6. In a power transmission, the combination of
a drive shaft; a casing mounted for rotation on
said shaft; a gear within said casing and rotat
able with said shaft; an idler gear in mesh with
said gear; fluid in said casing and surrounding
said gears; a shaft adapted to be driven by said
casing; differential gearing between said idler
gear and said driven shaft: and means to vary the 15
speed of said driven shaft by regulating the flow
of ñuid in said casing.
7. In a power ton. the combination
of a housing: a drive shaft; a casing mounted on
said shaft for rotation thereo ; fluid in said 20
casing; a gear within said casing and fixed to
said shaft; an idler gear in mesh with said gear:
a shaft adapted to be driven by said casing; dif
ferential gearing between said idler gear and said
driven shaft; planetary gearing associated with
said driven shaft; a second driven shaft: and
means to change the direction of rotation of said
second driven shaft.
trolled gearing.
4. In a transmission mechanism the combina
tion of a driving shaft: a driven shaft; a casing
adapted to contain a fluid; an internal gear in
said casing and secured to said driving shaft; an
idler gear in mesh with said internal gear; and
differential gearing connected to said internal
gear and said idler gear means to control the
circulation of fluid in said casing to drive said
driven shaft through said idler gear and said
casing.
5. In a power transmission, the combination of
.
8. In a power transmission, a housing; a drive
shaft; a rotatable casing; a rotary gear train in 80
said casing; diñ’erentiai gearing associated there
with; a plurality of shafts connecting said gear
train to said dlñerential gearing: a driven shaft;
mea‘ns to drive said driven shaft through said
differential gearing by one or more of said shafts;
a planetary gear train cooperating with said
driven shaft; a second driven shaft; and means
to change the direction of rotation of said second
driven shaft.
'
ROBERT L. BALLAN‘I'YNE.
40 a housing; a casing rotatable within said housing;
a drive shaft; a driven shaft; an internal gear
CERTIFICATE OF CORRECTION .
October 1B, 1958.
Patent No. 2,155 ,276.
ROBERT L. BALIAN'I‘YNE.
It 1s hereby certified that error appears in the printed specífication`
of the above numbered patent requiring correction as follows; Page 5, second
column, line 8, for "gevel" read bevel; page LL, first column, line 55,
claim Il, strike out the word "and" and insert the same before "means",
line 55, same claim; and that the said Letters Patent should be read with
this correction therein that the same may conform to the record of the case
in the Patent Office.
Signed and sealed this 10th day of January, A. D. 1959.
Henry Van Arsdale
(Seal)
10
Acting Commissioner of Patents.
40
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