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Патент USA US2412468

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Dec. '10, 1946.
'
‘ w. H. NEWELL E
‘3,412,463
VARIABLE SPEED DEVICE
Filed May 5. 1945
E
7 Sheets-Sheet 1
‘
\NVENTOR
> v~ HNewelL
I‘
'
ORNEY
Dec. 10, 1946.
-
“
w. H. NEWELL
2,412,468
VARIABLE SPEED DEVICE
Filed May 5, 1945
1
i
7 Sheets-Sheet 3
Dec. 10, 1946.
w. H. NEWELL
2,412,468
VARIABLE SPEED DEVICE
Filed May 5, 1945
, 7 Sheets-Sheet 4
.12
I
ll
a
__ _
. I,"
Hi"; -'
VINVEINTOR
~ William H. Newell
’ ATTORNEY
Dec. 10, 1946.
W. H. NEWELL
2,412,468
VARIABLE SPEED DEVICE
Filed May 5, 1945
'7 Sheets-Sheet 5
INVENTYOR
" William H-Newelll
\
ATTORNEY
Dec. 10, 1946.
W. H. NEWELL
' 2,432,468
VARIABLE SPEED DEVICE
vFiled May 5, 1945
7 ‘Sheets-Sheet 6
152‘ 151
_ INVENTOR
10
1 -
-‘ H.
ATTQRNEY
ea
10, 1946.
'
w. H. NEWELL
£412,468
VARIABLE SPEED DEVI-CE
Filed May 5
116
115
1945
7 Sheets-Sheet 7
116
115
121
125
156
4'0
125
INVENTOR
1m
‘MW
.'
TTORNEY
Fatented @ec. id, rare
amass
vanranaa srann Lnnvron
William 181. Nowell, New York, N. ‘iii. asaignor to
Ford Instrument Company. Enos Long island
@ity, N. Y.,' a corporation at New Yuri-3.
Appiication May 5, 1945. Seriai No. dbhlliid
1'? @laima. (6i. ‘tam-i998)
ii
This invention relates to variable speed devices
Referring to Figs. 1 and 3, the invention is
of the frictional type and has for an object to
provide a mechanical integrator having novel and
improved features of operation and details of
shown as applied to a ball integrator which is
driven at a constant speed by a motor it on the
shaft of which is mounted a gear ii. The gear
it drives the integrator through a gear it which
is mounted on a shaft is which carries a driving
construction,
Another object is to provide an integrator of
relatively simple, compact construction.
roller it and is journalled in bearings it held in
Another object is to provide an integrator which
is accurate and dependable in operation.
a bracket it. End plates i?! attached to the
bracket it hold the bearings it in place.
.
_
Various other objects and advantages will be
The driving roller it engages the surface of
a ball it which engages and is free to rotate
fully disclosed.
_
between con?ning rollers it which are carried
Although the novel features which are believed
in a cage 22 having a hollow hub 23 which is
to be characteristic of this invention are pointed
journalled in bearings 26 to rotate in a station
out more particularly in the claims, the nature 15 ary frame 25 attached by screws 28 to the base
of the invention will be better understood by re
2?. The bracket in is secured to the frame 25
ferring to the following description, taken in
so that the driving roller it engages the ball 20
connection with the accompanying drawings in
at a point lying in the axis of the hub 23. The
which certain speci?c embodiments thereof have
hub 23 carries a gear 2%) meshing with a gear 29
been set forth for purposes of illustration.
20 on a shaft 8@ (see Figs. 3 and 7) of the mecha»
In the drawings,
nism which is to be driven by the integrator,
apparent as the nature of the invention is more
Fig. 1 is a Plan view of a ball integrator em
The con?ning rollers ii are mounted on cage
22 to rotate about axes which lie in the same
bodying the present invention;
Fig. 2 is a longitudinal section taken on the
diametrical plane of the ball 29 and are normal
to the radii of the ball passing through the re
mechanism;
spective points of contact of the rollers 2! with
Fig. 3 is a longitudinal section taken on the
the surface of the ball. Four rollers 2! have
line 3—3 of Fig. 1 showing the drive mechanism;
been shown although other numbers may be used
Fig. 4 is a transverse section taken on the line
if desired and spaced to con?ne the ball it to
d-d of Fig. 1 showing the control mechanism for 30 rotate therebetween. The cage 22 rotates about
the steering roller;
an axis whlchis normal to said plane and co?
Fig. 5 is a transverse section‘ similar to Fig. 4
incides with a diameter of the ball. The motor
showing the control mechanism in a di?’erent po
it is mounted on a bracket at extending from
line 2-2 of Fig. 1 showing the steering roller
sition;
'
the base 2i,
Fig. 6 is a section taken on the line 6-6 of 35
Fig. 3;
Fig. '7 is a left side elevation of the drive mechl
anism of Fig, 3;
Fig. 8 is a. left side elevation of a ball integra
tor illustrating a different embodiment of the
1
The ball 26 engages a steering roller 85, Figs.
1 and 2, which is mounted on a shaft 36 jour
nalled in bearings 31 in a bracket 38. The brook» ‘
et 38 is attached to a pin 39 which is mounted
for rotation in bearings it mounted in a frame
it attached to the base ii.
The rollers 85 and it are held in contact with
49
invention;
Fig. 9 is a. plan view of the integrator of Fig. 8;
the surfaceof the ball it by a thrust member
Fig. 10 is a longitudinal section taken along
comprising a button 55 mounted in a, bearing
the line l0—l0 of Fig. 8;
it in a cross arm dl which is pivoted by means
Figs. 11 and 12 are diagrammatic views illus 45 of a pin 88 in an ear extending from the frame
trating the operation of the embodiment of the
M. The button at is held in pressure engage
invention shown inFigs. 1 to 7; and
ment with the end of the pin 39 by a spring 69
Figs. 13 and 1d are diagrammatic views illus
trating the operation of the embodiment shown
in Figs. 8 to 10.
'
which extends between a pin to mounted in
~ears bl oi the cross arm ti and a stationary
stud 52 attached to the base 27.
amaace
m
in
.
E is the angle of displacement or the steering
The position of the steering roller
is con
trolled by an arm 58, Figs. 2. 4. and 5, which is
roller from its central or zero rate position.
The equation expressing the angular velocity
attached to the bracket 38 and has a bifurcated
end forming a’ slot 6d engaging a roller (55
mounted on a slide 52. The slide 62 is carried
by rollers 63 which rou in a track formed by a
oi’ the ball due to the angular velocity of the
driving roller and the angular position of the
steering roller may be expressed by the following
channel member 613 attached to the frame ill.
The slide $2 is formed. with a racl; “it which is
engaged by a pinion ‘ll meunted on a shaft '32
journalled in a bracket attached to the channel
equation:
\
.
it
VB sin b=kVg or V3: "73 sin b
(2)
where Vs equals the angular velocity of the hall,
member t6.
'
‘
Va equals the angular velocity of the driving
in the operation of the above described integra
roller, and 7c equals the diameter of the driving
. tor the driving roller It, which is driven by the
roller divided by the diameter of the ball.
motor Mi, represents one of the inputs of the
Referring now to Figs. 11 and 12 only it will
integrator, for example, time. The ball 2% is 15
be seen that,
driven by the driving roller Id. In order to have
true rolling contact with both the driving and
(3)
I Vo=VB cos b
driven rollers the ball must always rotate about
in which Vo equals the angular velocity of the
an axis whichlies in the line of intersection of
the diametrlcal planes d and s of the ball 20
containing the axes of the driviing roller IQ
20° age.
Substituting
and the steering roller 35 respectively. With the
steering roller 35 in the position shown in Figs.
(4i
(2) in (3)
Vc= Va m cos b or Vc= VB Fit-5
1, 2, 4 and 11 the ball 20 rotates about an axes
Substituting (1) in I4)
parallel to the axis of the rollers I4 and 35 as 25'
indicated by the circle. 0 at the intersection of
tan B
sin 0;
the planes (1 and s in Fig. 11. In this position of
the steering roller the axis 0 lies in the plane
Since a is a constant for a particular unit,
containing the axes of the rollers 2| and it will be
(6)
VC=k1Va tan B ,
seen from Fig. 11 that although there is a com 30
ponent of motion of the ball 20 which may cause
in which
the rollers 29 to rotate on their axes there is no
component of motion of the ball tending to rotate
the cage 22.
k]: . k
.
a
. The rate input to the integrator is applied to the 35
shaft ‘I2 which through the pinion 'II drives the
rack 10 and slide I52 to the rightor left of the
position shown in Fig. 4, for example, to the
position shown in Fig. 5.
As the slide 62 is
Bill a
The ratio of the instantaneous angular velocity
of the cage to the instantaneous angular velocity
of the driving roller. therefore may be expressed
as follows:
,
shifted laterally the roller 6| causes the arm 58 40 (7) /
and the steering roller 35 to pivot about the axis
of the pin 39 through the angle B which is the
Since tan B is represented by the displacement
angle whose tangent is proportional to the dis
of the slide 62 the velocity of the cage for a given
tance the slide 62 is displaced from its central
velocity of the input roller is proportional to the
position. This new position of the steering roller 45
tdiisplacement of the slide 62 from its central posi
35 changes the axis of rotation of the ball .20 to
on.
the position indicated by the circles o in Fig. 12,
Referring now to the embodiment of Figs. 8 to
that is, the intersection line of planes d and s.
10, a driving motor I00 is shown as mounted on a
Inasmuch as this new axis no longer lies in the
plate IM and driving a gear I02 which meshes
plane containing the axes of the rollers 2I, there
with a gear I03 attached to a shaft I04 which is
is a component of the rotary movement of the
Joumalled in brackets I05 carried by the plate
‘ ball 20 which causes the cage 22 to rotate about its
IOI and which carries‘a driving roller I06.
axis, thereby driving the gears 28 and 29 and the
The driving roller I06 drives a ball III] which
shaft 30 to represent the output from the integra
rotates between con?ning rollers I II mounted on
tor.
'
The movement of the cage 22 is a measure or
the rate represented by the position of the input
shaft 12 integrated against the value represented
by the rotation of the driving roller I4.
.
55 brackets I I2 carried on a cage I I3 (Fig. 10) which
is attached to a hub Ill iournalled in bearings
H5 in a frame H6.
The frame IIIi carries posts '
I H which support the plate IN.
A steering roller‘I20 is mounted for rotation in
Referring to the spherical right triangle, shown 60 a bracket I2I carried by a pin I22 which is
on Figs. 11 to 14, having the sides a, b. and c, it will
journalled in bearings I23 and I24 in a frame I25
be seen that;
\
attached to the frame IIB. Athrust bearing is
8111 G
8111 a
provided which comprises a button I30 mounted
(1)
Tan b_cot (90-B) =tan B
'in a bearing‘ I3I in an arm I32 which is
in which a is the angle between the axes of the 65 pivoted by a pin I33 to ears I34 attached to the
frame I25 and is held against the end of the
ball passing through the points of contact of the
pin I22 by a spring I36 which extends between the
driving roller and the steering roller respectively.
free end of the arm I32 and a pin I35 secured to
b is the angular displacement or the axis of
the frame II6.
,
'
'
rotation o of the ball in the plane d from the
An arm I40 is secured tothe pin I22. The
point of contact of the driving roller with the 70
arm corresponds to the arm 58 of Figs. 1 to '7
ball; .
r
and may be provided with a similar rack and
c is the angular displacement of the axis of
pinion for determining the angular position there
rotation o of the ball in the plane s from the
of. The cage H3 is provided with gear teeth
axis of the ball passing through'the point of con
75 I“ meshing with a. gear I42 attached to an
tact of the steering roller with the ball, and
' aaiasas
6
output shaft I43 which is journalled in the plate
i0! and a bracket N5 extending from the frame
whereas in Fig. 10 the plane containing the axes v
of rollers Hi is normal to the diameter of the.
H6. The relationship of the various rollers and
the cage with respect to the ball lid is similar
to that set forth in connection with Figs. 1 to '7
/
except that the axis of vthe hub lit and the "
cage H3 is concentric with the axis of the pin
of the steering roller I20 instead of the axis of
the ball passing through the point of contact of
the driving roller with the ball.
10
ball H0 extending through the point of contact
of the surface of the ball with the steering roller
. _The operation of the embodiment shown in
design. in both embodiments shown the com
i213. It will be obvious from Equation 12 that
the same relationship except for the constant of
the equation will hold if the plane containing the
axes of the con?ning rollers extends at other
angles a’ and that the value of this angle a.’ is
dependent only upon mechanical limitations of
Figs. 8 and 10 is similar to that above described.
ponents of rotation of the ball normal’ to the
The driving roller “16 is rotated by the gears IE2
plane of the cage cause rotation of'the con?ning
and H38 and the motor I90. The angular posi
rollers about their respective axes.
tion of the axis of rotation of the ball Ht is is ‘Although speci?c embodiments of the inven
determined by the relative positions of the driv
tion have been shown for purposes of illustra
ing roller ms and the steering roller tit, and,
‘-tion, it is to he understood ‘that the invention
as in the above case, is the linear intersection
is capable of’ various uses and that changes and
of the diametrical planes (1 and s oi’ the ball
modi?cations may be made therein as will be
H0 containing the axes ofthe rollers its and 828 20 readily apparent to a. person skilled in the art.
respectively. When the axis of rotation of the
The invention is only to be restricted in accord
ball H0 does not lie in the plane containing
mice with the scope of the following claims.
the axes of the con?ning rollers ii i, there is a
What is claimed is:
component of motion of the bail causing rota
1. A variable speed device comprising a ball, a
tion of the cage US which drives the gear it? 25 driving roller engaging the surface of said ball
and the shaft ids attached thereto. The move;
and driving the same at a controlled rate, a steer
ment of the shaft M3 represents the rate cor
responding to the position of the arm its inte
ing roller engaging the surface of said ball and
mounted ~for orientation of its axis of rotation
grated against the value represented by the rota=
about .an‘ axis extending through the center of
tion of the driving roller W5.
30 said ball and the point of contact of the surface
By reference to Figs. 13 and 14 it will be seen ‘ .of said ball with said steering roller, input means,
that the component of movement of’ the ball
to control the orientation of the axis of said steer
causing rotation of the cage may be expressed by
ing roller, a plurality of con?ning rollers engag
the equation,
(8)
ing the surface of said ball with their axes of ro
35 tation lying in the same diametrical plane of said
Vc'==VB cos 1; cos a’
in which V0’ is the angular velocity of the cage
and a’ is the angle between the plane of the
cage and a plane normal ‘to the plane (1.
Substituting (2) in (8)
(9)
V0I=VR Bin—b cos b cos a’
ball, and an output member carrying. said con
?ning rollers and mounted for rotation about a
diameter of said ball normal to said plane and
lying in the diametrical plane of said ball con
40 taining the points of contact of the surface of
said ball with said ?rst rollers.
2. A variable speed device comprising a ball,
means driving the same at a controlled rate, a
or
steering roller engaging the surface of said ball
45 and mounted for orientation of its axis of rota
VgI= V3 1195-1, 005 11’
tion about an axis extending through the center
of said ball and the point of contact of the sur
Substituting (1) m (9)
face of said ball with said steering roller, input
k
means to control the orientation of the axis of
tan'B
cos
a’
(1°)
’ V'~".= "R me
50 said steering roller, a plurality of con?ning roll
ers engaging-the surface of said ball with their
Since a and a’ are constants for a particular
unit
(11)
'
_VO'=kaVR tan B
in which
_i
,
k8_sin 0. cos a
axes of rotation lying in the same diametrical
plane of said ball, and an output member carry
ing said con?ning rollers and mounted vfor ro
55 tation about the axis of orientation of said steer
ing roller.
3. A variable speed device comprising a ball, a
driving roller engaging the surface of said ball
The ratio of the instantaneous angular velocity
and driving the same at a‘controlled rate, a. steer
of the cage to the instantaneous angular velocity 60 ing roller engaging the surface of said ball and
of the driving roller therefore may be expressed
mounted for orientation of its axis of rotation
about an axis extending through the center of
as follows:
said ball and the point of contact of the surface
(12)
Va
of said ball with said steering roller, input means
It will be noted that for the construction rep
resented by Figs. 11 and 12 Equation 10 becomes
Equation 5 because a’ is o and cos a’ is 1.
It has been shown that the movement of the
cage 22 of Figs. 1 to '7 and of the cage N3 of Figs.
8 to 10 represents the integrated output of the
device. In Fig. 1, the plane containing the axes
of rollers 2i is normal to the diameter of ball
26 extending throughthe point of contact of the
surface of the ball with the driving roller is,
65 to control the orientation of the axis of said
steering roller, a plurality of con?ning rollers
engaging the surface of said ball with their axes
of rotation lying in the same diametrical plane
of said ball, and an output member carrying said
70 con?ning rollers and mounted for rotation about
a diameter of said ball normal to said plane and’
passing through the point of contact of the sur
face of said ball with said driving roller.
4. A variable speed device comprising a ball,
75 means driving the same at a controlled rate, a
9,419,468
,
7
steering 'oller engaging the surface of said ball
ball, a steering roller in contact with the surface
of said ball, means mounting said steering roller
and mo ted for orientation ofits axis of rota
tion about an axis extending through the center
for orientation of its axis of rotation about an
axis extending radially from the ball at the point
of said ball and the point of contact of the sur
face of said ball with said steering roller, an arm 5 of contact of the steering roller, an output mem
pivoted about said last axis to control the orien
ber mounted for rotation about an axis extending
radially from the ball and lying in the diametrical
tation of the axis of said steering roller, a slide
to control the position of said arm, an input
plane of the ball containing the points of contact
member controlling the position of said slide, a
of the driving and steering rollers, and a plurality
plurality of con?ning ‘rollers engaging the sur 10 of con?ning rollers mounted on the output mem
face of said ball with their axes of rotation lying
ber in contact with the surface of the ball and
having their axes of rotation lying in the dia
in the same diametrical plane of said ball, and
an output member carrying said con?ning roll
metrical plane of the ball which is perpendicular
to the axis of rotation of the output member.
ers and mounted for rotation about a diameter of
said ball normal to said plane.
9. A variable speed device comprising a ball,
15
a driving roller in contact with the surface of
5. A variable speed device comprising a ball,
means driving the same at a controlled rateI a
said ball, a steering roller in contact with the sur
steering roller engaging the surface of said ball,
face of said ball, means mounting said steering
a roller support carrying said roller and mounted
roller for orientation of its axis of rotation about
for orientation about an axis extending through 20 an axis extending radially from the ball at the
the center of said ball and the point of contact
point of contact of the steering roller, an output
of the surface of the ball with said steering roll
member mounted for rotation about an axis ex
er, an arm attached to said support, a slide
tending radially from the ball and lying in the‘
diametrical plane of the ball containing the
mounted for movement normal to said arm when
said. arm is in a predetermined mid-position, 25 points of contact of the driving and steering
connections to control said arm by said slide, a
rollers, a plurality of con?ning rollers mounted
rotary driving member engaging said slide to ac
on the output member in contact with the surface
tuate the same, a plurality of con?ning rollers
of the ball and having their axes of rotation
engaging the surface of said ball with their axes - lying in the diametrical plane of the'ball which
of rotation lying in the same diametrical plane of 30 is perpendicular to the axis of rotation of the out
said ball, and an output member carrying said
put member, and yieldable means for main
con?ning rollers and mounted for rotation about
taining the said driving and‘ steering rollers in
a diameter of said ball normal to said plane.
contact with the ball.
6. A variable speed device comprising a ball,
10. A variable speed device comprising a ball,
means driving the same at a controlled rate, a 35 a driving roller in contact with the 'surface of
steering roller engaging the surface of said ball,
the said ball, a steering roller in contact with the
a roller support carrying said roller and mount‘
surface of said ball, means mounting said steering
ed for-- orientation about an axis extending
roller for orientation of its axis of rotation about
through the center of said ball and the point of
an axis extending radially from the ball at the
contact‘ of the surface of the ball with said steer 40 point of contact of the steering roller. an output
ing roller, an arm attached to said support, a,
member mounted for rotation about an axis
slide mounted for movement normal to said arm
aligned with the axis of orientation of the steer
when said arm is is a predetermined mid-posi-q
ing roller, and a plurality of con?ning rollers
tion‘, connections to ' control said arm by said
mounted on the output member in contact with
slide, a rack on said slide, a rotary gear driving 45 the surface of the ball and having their axes
said rack to thereby control the orientation of
of rotation lying in the diametrical plane of the
the axis of said steering roller, a plurality of con
ball which is perpendicular to the axis of rota
?ning rollers engaging the surface of said ball
tion of the output member.
with their axes of rotation lying in the same di
11. A variable speed device comprising a ball,
ametrical plane of said ball, and an output mem
50 a driving roller in contact with the surface of
ber carrying said con?ning rollers and mounted
said ball, a steering roller inlcontact with the
surface of said ball, means mounting said steer
to said plane.
ing roller for orientation of its axis of rotation
'7. Anintegrator comprising a ball, a driving
about an axis extending radially from the ball
roller engaging the surface of said ball and driv 55 at the point of contact of thesteering roller, an
ing the same, a motor driving said driving roller,
output member mounted for rotation about an
a steering roller engaging ,the surface of said
axis extending radially from the ball at the point
ball, a roller support carrying said steering roller
of contact of the driving roller, and a plurality
and mounted for orientation about an axis ex
of con?ning rollers mounted on the output mem
tending through the center of said ball and the ao ber in contact with the surface of the ball and
point of contact of the surface of the ball with
having their axes of rotation lying in the dia
said steering roller, an arm attached to said sup
metrical plane of the ball which is perpendicular
port, a slide mounted for movement normal to said
to the axis of rotation of the output member.
for rotation about a diameter of said ball normal
arm when said arm is in a predetermined mid
12. A variable speed device comprising a ball, ‘
position, connections to control said arm by said 65 a driving roller in contact with the surface of
slide, a rotary driving member engaging said
said ball, a steering roller in contact with the
slide to actuate the same, a plurality of con?ning
surface of said ball, means mounting saidsteer
rollers engaging the surface of said ball with their
ing roller for orientation of its axis of rotation
axes of rotation lying in the same diametrical
about an axis extending radially from the ball
plane of said ball, and an output member carry 70 at the point of contact of the steering roller, an
ing said con?ning rollers and mounted for rota
output member mounted for rotation. about an
tion about a diameter of said ball normal to said
axis aligned with the axis of ‘orientation of the
plane.
steering roller, a plurality of con?ning rollers
8. ‘A variable speed device comprising a ball, a
mounted ‘on the output member in contact with
driving roller in contact with the surface of said 75 the surface of the ball and having their axes of
2,412,468
rotation lying in the diametrical plane of the
of the output member, and yieldable means for
maintaining said driving and steering members
ball which is perpendicular to the axis of rota
tion of the output member, and yieldable means
for maintaining the said driving and steering
rollers in contact with the ball.
'I
i
13. A variable speed device comprising a ball.
a driving roller in contact with the surface of
in contact with the‘ ball.
,
16. A variable speed device comprising a ball,
a driving roller in contact with the surface of
said ball, a steering?roller in contact with the
surface of said ball, means mounting said steer
ing roller for orientation of its axis of rotation
surface of said ball, means mounting said steer
about an axis extending radially from the ball at
ing roller fororientation of its axis of rotation 10 the point of contact of the steering roller, an
about an axis extending radially from the ball _
arm extending radially from said mounting
at the point of contact of the steering roller"
means, an input member slidably connected to
with the ball, an output member mounted for I the arm and movable in the plane of movement
rotation about an axis extending radially from
of the arm in a direction perpendicular to the
the ball at the point of contact of the driving
position of the arm when the axis of rotation
roller, a plurality of con?ning rollers mounted
of the steering roller is parallel to the axis of
said ball, asteering roller in contact with the
on the output member in contact with
face of the ball and having their axes
tion. lying in- the diametrical ‘plane of
which is perpendicular to the axis of
the sur
of rota
the ball
rotation 20
of the output member, and yieldable means for
maintaining the said driving and steering rollers
in contact with the ball.
14. A variable speed device comprising a ball,
a rotatable driving member in contact with the
in contact with the surface of said ball, means
mounting said steering member for orientation 0!
put member.
.
mounted for rotation about an axis extending
radially from the ball and lying in the diametri
cal plane of the ball containing the points of con
tact of the drivingand steering rollers, and a
plurality of con?ning rollers ‘mounted .on the
put member.
-
v
_
'_
_17. A variable speed device comprising a ball,
its axis of rotation, an output member mounted '
from the ball and lying in the diametrical plane
of the ball containing the points of contact of
the driving and the steering members, and a
plurality of con?ning rollers mounted on the
output member in contact with the surface of
the ball and having their'axes or rotation‘ lying
in the diametrical plane of the ball which is
perpendicular to the axis of rotation of the out
rotation of the driving roller, an output member -
output member in contact with the surface of
the ball and having their axes of rotation lying‘
in the diametrical plane of the ball which is
perpendicular to the axis of rotation of the out—
surface of said ball, a rotatable‘steering member
for rotation about an axis extending radially
_ ,
a driving roller in contact with the surface 01’
30 said ball, a steering roller in contact with the
‘surface of said ball, means mounting said steer
ing roller for orientation of its axis of rotation
about an axis extending radially from the ball at
the. point of contact of the ‘steering roller, a
radial arm extending'from said mounting means,
an input member slidably connected to the arm
and movable in the plane of movement of the
arm in a-direction perpendicularrto the position
of the arm when the axis of rotation of the ‘
15. A variable speed device comprising a ball, A steering roller is parallel to thevraxis oi’ rota
a rotatable driving member in contact with the
tion of the driving roller, an output member
surface of said ball, a rotatable steering mem
mounted for rotation about an axis extending
ber in contact with the surface,‘ of s “id ‘ball,
' radially from the ball and lying in the diametri
means mounting said steering‘ m her for
_cal plane of the ball containing the points of
orientation of its axis of rotation, ‘an output.
contact of; the driving and steering rollers, a
member mounted for rotation about an axis ex
plurality of con?ning rollers mounted on the‘
tending radially from the ball and lying in the
output member in contact with the surface of
diametrical plane of the ball containing the '
the ball and having their axes of rotation lying
points of contactof the driving and the steering c
in the diametrical plane of the ball which is per
members, a plurality of con?ning rollers mount 50 pendicular tothe axis of rotation of the output, ed on the output member in contact with the sur
face of the ball and havingtheir. axes of rota
tion lying in the diametrical plane 01s the ball
which is perpendicular to the axis of'rotation
member.~ and yieldable means for maintaining
the said driving and steering rollers in contact
with the ball.
-WILIIAMH.NEWELL.
-
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