close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2111149

код для вставки
March l5, 1938.
'
A. MADLE
>
2,111,149
POWER TRANSMISSION MECHANISM
Filed May 5, 1955
«4.5
56
Tî E
:L
è
a@„zT-.r1
.
/
l
FLM-_“ ¢ - ‘www2/7,5%(
`
54 ‘._ 62
`
w
ATTO
2,111,149
Patented Msi-.ia l193s
vil'lvl'l‘it-:D STATES’
v
PATlitri> t oI-‘Fica ¢
15,111.1»
>Irowlilt mnsmssron nommen
V».silznortournoi
Alain Maillé, Bristol,
Conn.,
i
Corporation. New York, N. Y_., a oor
poration of New York
Amma@ my s, ma serai No. lstorm
3l Clalml. (Cl. `Plz-F5239)
independently of the» power transmittedby the
motor, are eifected by the .motive power. In
such a transmission, asia practical matter, the
This invention relates to variable speed power
transmission mechanisms and particularly to
automatically operative means for causing such
on ratio, can be changed only while
the parte of the trn ,are in motion. 5
Therefore, unless the ratio >is low at the time '
. mechanism to assume 'a predetermined ratio set
5 ting upon predetermined changes in the operat
ing conditions aiiecting Íthe prime mover.
i
For purposes of convenience of reference jthe
prime mover will hereinafter be referred toas
the motor and in the embodiment herein illus
10 trated this has been disclosed as electrically en
ergiœd. My invention has therefore been lllustrated as particularly arranged for- functioning
in connection with electricity as `the source of
of the stoppage of the motor, .the restarting ot
the motor must be‘eii'ected under the highload
conditions of maximum speed which'is apt to be
impossible.
f
l
10'
tion -to provide an arrangement which becomes
automatically voperative immediately upon the
vceasing ofthe flow of energy `to the moto , as
for example, the shutting on of the electric cur- 15
rent and while the motor is still operatingunder
momentum. to eñect a change in the ratio voi'
transmission to low ratio.
Similar problems to those referred to exist
where overload conditions occur while the ratio 20
, ' energy, although it will be understood that as to
15 the broaderphases thereof, my. invention can be
embodied in an arrangement peculiarly adapted
for sources of power other than electricity.
The stoppage of a motor, transmitting through
a variable speed power transmission while in high
speed ratio, leaves the
t
It is therefore a further object .of my inven
onl in a ratio
is above the minimum, andxny invention also
contemplates as one of its features the provision
setting which will place _maximum load upon the
motor when it is restarted, and in fact, will make
it impossible to restart the motor, where, for
example, the motor stopped bffause of an over- »
25 load. It is to be understood, that _by the term
"high speed ratio" as used hereinafter. I mean
a ton ratio in which the speed of the
driven member as compared to that of the driv
ing member or motor is relatively high. so that
30' the torque to be overcome by the motor is' rela-'-A
oi' an arrangement for automatically reducing
.the ratio where such conditions occur. In the
illustrated embodiment, where the motor is ener- 25.
sized by electricityi'and therefore the overload
conditions result in anabnormal increase ci' cur
rent the functioning o! my arrangement is dis
closed as dependent upon or responsive to such
\
abnormal Anow of electricalenergyfand in thel ,o
detailed construction, this is so
'tivelyhiglt And further by the'term"‘low. speed
with
the underload mechanism already vdiscussedpasinst
'ln'which the speed'of the drivenmember as to control the` operation of that
as if the `'current had been cut oil. „
"
, compared to that of- the. driving memberis rela
The following conditions resuiting'from over-v v35„
35' tively low; so that the torque to be overcome by
ratio" or “low ratio” I mean va transmission ratio
the motor'isrelatively low.
t y
V
‘
loads are frequently metwlth: (l) ‘a fuse blows '
One of the objectsv oi.’ mylinventionv involves vits-'the zresultof anoverload. (2) the motor
’
association with a variable speed power tram#l f
"It the ‘adjustingmechanism -is responsive
to reduce‘ the
40‘jerative, whenv the motor ceases' operatinm` to' 'speed ratio beforecithcr of'these occurrences '40 4
the
n info position „oflourA takel places, "The, mechanism should .therefore
speed of action
ratio. ' jIn the embodiment herein
when! befslo designed in relation
and the
,the motor is electrically driven. .the automati `.of theprotective dèv'ices,such
.~ v»mission.'inechanisin. of means antor'r'iat‘icallyf»op».V
quickly enough, it will
iii-¿thc motor, as to
f cally operative means lare
lor purposes rapidity of slowing'occurrences.¿ 45
45 of illustration, ‘as being m'iheirogmcz .sn air-1 - avoideither of theabove-fmentio'ned as
embodied
rangement responsive to
„in current:
4and voltage. as to have the
insumcient'
>Mir'i'm'ention, is
‘electricity ib) the Ínis oi' the adhsc»l
in a device'in'which (al the motive power -«is
toÍproperly energize the motor, although the
broaderphases of my invention may bc attained ‘vs_ivecxmtinuously variable Étype comprising races 1
so' _ where such means are responsive toa factor other` _and rollers and- (c)
, ¿than drop in voltage.
’
`
«rollers >are free `toglie vgm’
angled about an axis `sionisti-iconv_' through imei ` 'l
l Y *i
My invention has been lllustratedzin'vfvconnecd'
points ,of adhesive contact of the
' and
tionwitn altpowertransnissionfmechanism of
the
rollers,Vv
,rollers
a/eontinuous'ratio
andwhen-»angled-to
id) the rotation
change".
tilt
«of the
\ " f ‘
\ the adhesive type which!!- villîllti?uously variable: cause
ss and _in
controllable ..
f; .
2
2,111,149
The invention as to one of its phases, takes
the form of an' arrangement which is responsive
to a voltage drop sufficient to cause the motor
to cease operating, and to automatically cause
the aforementioned angling of the rollers in
such direction that upon the continued opera
tion of the races under momentum the roller
shifting will be eifected to tilt the rollers to a
10
position of minimum ratio of transmission.
As to another of its phases the invention takes
the form of a similararrangement. operative,
however, only where .the electric current input
into the motor is excessively high.
It will be understood, of course, that a single
energized so as to open the switch 2l associated
The effect of this also will be to break
the circuit of solenoid 26 and to de-energize th
. with it.
same.
'
It is next proposed to describe the application
of my invention in connection with a power
transmission mechanism of a type for providing
speeds continuously variable within certain lim
its and in which `a system of rotating races is
provided, which have rolling bodies between 10
them, and in adhesive contact with them, to
transmit motion from the driving race or races
to the driven race or races. Speed variation is
effected by tilting the axes of the rolling‘ bodies
15 arrangement can serve both phases and I have , so as to change their points of contact with the
so illustrated my invention.
races and thereby to vary the relative rotational
The arrangement herein illustrated and dis
speeds of .the driving and driven races. It is a
closed is subject to variations without departing
from the spirit of my invention. For example,
20 the manner of energizing the motor will vary the
arrangement. So too the functioning of the ar
rangement need not be dependent upon abnor
mal conditions `of power 110W.
For the attainment of the aforementioned ob
25 jects and of such other objects as will herein
after appear or be pointed out, I have illustrated
one embodiment of my invention in the draw
ing in which:
-
Figure 1 is a diagrammatic View of my inven
30 tion showing an illustrative lay-out of the elec
tric circuits;
Figure 2 is a sectional view through a trans
mission mechanism showing associated there
with certain details of my invention; and
Figure 3 is a section on line 3--3 of Figure 2,
looking in the direction of the arrows.
Before proceeding to describe the details which
may be associated with the practical embodi
ments of mir-invention, I will proceed to describe
40 its general features and general operation as ap
35
plied to an electric motor.
On viewing Figure 1 of the drawing it will be
observed that I have shown an electric motor 20
which is energized fromfthe power line 22. A
45 switch 24 is interposed between the line and the
motor, as are also protective devices such as de
layed action, overload relays 25. which may be
fuses.
The power line has been shown as sup
plying three-phase alternating current, by way
50 of example, but it will be obvious from the de
scription which follows that my invention is
equally applicable to other types of electric power.
Across two of the conductors of the power line
is shunted a solenoid 26, and in series with one
55 of the conductors of the power line is a solenoid
28, which is part of a circuit-breaking device of
the quick-break overload type and acts to open
the circuit ofsolenoid 26 by means of switch 21,
when it becomes active due to an overload in the
60 conductor.
Solenoid 26 has associated with it a plunger
or other moving part which, when the solenoid
is de-energized suñiciently will be caused, by the
action of some means such as a spring, to release
65 mechanism which will be effective to set the
speed ratio of the transmission in a desired man
ner. De-energization of solenoid 26, total or par
tial, may take place as a result of opening of the
switch 24, of operation of. the overload relays 25,
70 of the burning out or short circuiting of part of
the electric circuit, or` of other causes which it is
believed unnecessary to enumerate.
‘
If the load on the motor increases so that the
current passing into the >saine exceeds a certain
75 predetermined amount, the solenoid 28 will be
characteristic of such systems that in order to
effect ready tilting of the rollers for purpose of
speed variation the parts must be moving and it
is therefore important that any setting of the
speed ratio be effected while the parts are still
moving, and before they have come to a stop due
to the stoppage of the motor. In effecting the
tilting of the rollers, it is further customary in
modern practice to make use of the principles of
gyrostatic precession, according to which pres
sure is applied against the axis of tilting of the
roller in a direction at right angles to the direc
tion in which it is desired to tilt the roller. This
principle is well understood and a system of vari
able speed power transmissions of the type to
which I have reference will be found disclosed
in the patent to Erban, No. 1,619,813 of March 8,
1927. The tilting of the rollers to cause speed
variation is customarily effected by a moving
member which, by a system of links, racks or
similar devices, causes the tilting of the roller
axes. For the sake of simplicity, I have illus
trated a simple form of roller tilting device, in
which the principle of gyrostatic precession is
not used since the latter construction introduces
complexities into which it is unnecessary to go in
order to get a proper understanding of my de
l vice.
15
20
25
30
35
40
45
With the aid of this preliminary explanation,
the construction and operation of an illustrative
embodiment of my invention as applied to this
type of variable speed transmission will be read
ily understood on reference to Figures 2 and 3. 50
In said ñgures 26 indicates the solenoid already
mentioned in connection with Figure 1. The
solenoid 26 has associated with it an armature
or plunger 29 carrying a pin 32 which plunger
and pin are urged upward by a spring 30, but 55
when the solenoid is energized, will be pulled
downward by magnetic action to engage with an
opening 34 provided in a member 36, by means
of which the angular relation of rollers 38 to
races 42 may be controlled for the purpose of 60
effecting a change in the speed ratio of the trans
mission. Such control of the angular relation
of the rollers iseffected through member 36 by
means of elements 4I which impart motion of
36 to carriages 39 within which rollers 38 are 65
journalled. The details of such a construction
are not necessary to an understanding of my
invention as they are well known. However, ref
erence may be made to the Erban patent here
inbefore mentioned as using the gyrostatic prin 70
ciple or to the patent to Spencer, No. 682,763
of September 17, 1901 showing an older and sim
pler construction. Member 36 is pushed in a di
rection effective to reduce the ratio of speed
transmission, by a compression spring M. Y, This
3
2,111,149
actionV of the spring, however, cannot take place
as long as the pin 32. engages the opening 34 in
the` member 36, because the `pin and the solenoid
with which it is associated are held against
conveniently pushed î inward after it has been
movement by the shifting carriage 50 with which
trated its use, what I claim as new and'desire to
they are fixedly associated, which carriage is ad
justably held in position by a shifting screw 52
actuated through suitable gearing'54`by a wheel
secure by Letters Patent is:
56, which is shown as »a hand Wheel, but may,
pushed, outward asa result of the automatic ratio
setting
’
action.
`
n
`
y
`
`
Having thus described Lmy invention and illus
v
` 1. In a system of power transmission in which
motive power is transmittedirom a prime mover
to a load at variable speed, means for automati
of course,fbe operated vby motive power where
callydecreasing the speed ratio of the transmis
desired or necessary, as where great power is re
sion and means in the path of power input into
quired for the adjustment,' or-where the control
the prime mover` for causing said automatic
means to become operative under predetermined
conditions of power input into the prime mover,
station is remote. l It will'be obvious that while
the carriage 50 may be shifted by the hand wheel
15 56, it will be impossible if the screw 5_2> is suit'
ably pitched, for the springs 44 to move the
carriage and gearing 54 may also be made ir
reversible~ for this purpose. It will, of course,
be 'understood that the transmission may be en
20 closed in a suitable housing which it is not nec
essary to describe, and that for the purpose of
simplicity and compactness all the parts de
10
and means drawing power from the power source 15
along a path parallelto the path of power into
the prime mover, for causing said automatic
means to ‘become operative under predetermined
conditions of power input into the prime mover.
2. In a system of power transmission in which 20
motive poweris transmitted from a motor to a
load at variable speed, means for automatically
scribed may beassociated with such housing in
decreasing the speed ratio of the transmission,
any convenient way.
means for causing said automatic means to be
come operative under predetermined conditions 25
of power input into the motor, and an element
in the path of the power input into the -motor
responsive to predetermined conditions of power
flow into the motor for causing said second means
'
In connection with the general description of
the parts just given, it will be understood that
normally, when the motor is running, the sole
noid 26 will have sufûcîent current passing
through it to keep the pin 32 in engagement with
30 the opening 34 in member 36, which will be held
in a certain position, which position, however,
may be altered at any time,_ as desired, by ad
justment through the wheel 56. If for any reason,
to become operative and thereby to cause said 30
automatic means to become operative.
Y
3. In a system of power transmission in which
motive power is transmitted from a prime mover
the voltage, and consequently the current, of « to a load at a variable speed, means for automat
solenoid 26 drops below a predetermined point, ically decreasing the speed ratio of the transmis 35
the spring 30 will move the pin 32 upward and sion, and means to render said automatic speed
out of the opening 311,` ythereby releasing the roller varying means operative when the power input
shifting member 36 and'permitting the spring 44 into the prime mover exceeds a predetermined ‘
to move member 36 into a position in which it
40 will cause the `rollers of the transmission to tilt
`
so as to reduce the transmission ratio. When this
4. In a system of power transmission in which
has taken place, if the motor isv again started, it
motive power is transmitted from an electric
motor to a load at a variable speed, means for
will do so under the- most favorable load condi
tions, which are those of low speed transmission
and therefore of light starting load. `Once the
parts are again running,'a resetting vvrod 48 con
nected to member 36 may be used to push the
said member against the action of spring“ into;
50
maximum or falls below a predetermined mini
mum.
automatically decreasing the speed ratio of the
transmission, and means to render said auto 45
matic speed varying means operativewhen the
power input into the motor exceeds a predeter
a position in which it will be again engagedr by
mined maximum or falls below a predetermined
minimum, said means comprising a coil shunted
pin 32 passing into aperture 34 and be again sub
across the electric power line serving the motor,
ject to control'by wheel 56. It is to be noted that
when'the motor is restarted, the ratio setting will
be that due to the automatic action, andbecause
of the difficulty or impossibility of adjusting the
and a second coil in the power line in series with
the motor and having means associated there
f ratio when the transmission is at rest. the new
adjustment cannot be given to the speed ratio
until after the motor has again been started.
If the mechanism driven through the transmis
sion consists »of parts possessing lgreat, inertia,
60 such as heavy ily-wheels or the like, it may hap
pen, unless the transmission is carefully designed,
that in attempting to reduce the transmission
40
with for interrupting the current in said iirst
coil.
i
5. In a system of power transmission in which 55
motive power is transmitted from an electric mo- -
tor to a. load ata variable speed, means for auto
matically decreasing the speed ratio of the trans
mission, and means to render said automatic
speed varying means operative when the power 60,
input into the motor exceeds a predetermined
maximum or falls below a. predetermined mini
ratio, the heavy parts will only gradually acquire . mum, said means comprising a coil shunted across
a reduced speed, and for a time may act through the power line serving the motor, and a second
65 the transmission to speed up the motor, which is
coil in the power line in series with the motor
obviously undesirable. For thatwreason it is de
and adapted to control the current in thefirst
sirable to delay the action of the spring 44.
coil.
A
convenient arrangement for accomplishing- this
6. In a systemof power transmission in which `
has been shown in Figure 2 inthe form `of a ,Y motive power is transmitted from a motor to al
dash-pot 58 of any suitable type, the piston 60 load at a variable speed, means for automatically 70
of which is ñxedly associated with the aforemen
decreasing the speed ratio of the transmission,
tioned push-rod 48, and the speed of action of ` and means to render said _automatic'speed vary
ing means operative when the power. input into
which is controllable by the adjustable valve 62.
Push-rod- 48 may be provided with- a push
the motor exceeds a predetermined maximum or
75 button head64, by means of which it may be
falls below a predetermined minimum, said _means 75
4
9,111,149
Y,
comprising an element responsive to a decrease
mission mechanism intermediate said prime
oi' the power input below said minimum; and an mover land said load, and means adapted, when
element responsive to an increase of the power ` the pressure causing the ilow oi power into the
input above-said maximum to cause operation
o! said ilrst element.
.
, ’
prime mover drops below a predetermined mini
mum, or when the ilow oi power into the prime
>mover exceeds a predetermined maximum, to
lower the speed ratio oi said power tron
mechanism toits -minimum value.
I
14; In combination with an electric motor. a
load driven thereby, and a variable speed power 10
.
'1. In a power transmission mechanism in which
~motive power is transmitted from a motor to the
load‘at a torqueratio capable of variation, means
for varying said torque ratio,V and’means rendered
10 operative by reduction of the power input into the
. motor below a predetermined amount 'i'or vary
transmission mechanism intermediate the motor
and the load, and means adapted, when thevolt
age causing current ilow into the motor drops
ing said torque ratio so as to reduce the torque
required of the motor, manually operable means
to restore said torque ratio to normal. and means
below a predetermined minimum, to_.lower the
15 to lock said manually operable means to said
speed ratio of, said power-on mecha 15
means for varying the torque ratio.v
Ill-sm
` 8. In a variable speed power ton sys
lil-In combination with an electric motor, 'a
_tem adapted to be interposed betweenv aprirne load driven thereby, and a variable speed power
mover and a load, means for automatically set
ting the speed ratio4 of the
on to its
minimum speed ratio position. locking means for
on mechanism intermediate the motor
and the load', and means adapted. when the cur
preventing operation of said ilrst means,V and
means responsive to predetermined conditions of
the power input into the prime mover to release
said. lockingV means and render effective said
to lower the speed ratio of said power 'transmis
sion
16. In combination with an electric motori a
load driven thereby and a variable speed power
4’means for automatically setting the speed ratio.
9. In a variable speed power transmission-sys
tem for transmitting power from a prime mover
to a load, means for automatically setting the
on mechanism intermediate the motor
and theload, and means adapted, when the volt
age causing current ilow into the motor dropsbe
low a predetermined minimum. to lower the speed
ratio of said power trn mechanism to
its minimum value.
‘17. In combination 'with an electric motor, a
speedratio of the transmission toits minimum
speed ratio position. manual control means for
manual control o! the speed ratio. locking means
for preventing operation oi' said first means and
for enabling operation oi' said manual control
35 means and means responsive to predetermined
load driven thereby, and a variable speed power .
conditions of the' power input into the prime
mover to release said locking means and render
. - »n :_1 on mechanism intermediate the motor
and the load, means for adjusting said trans
eiïective said'means for automatically setting the
»
missionmec
10.1111 combination with a prime mover actu'
atedby the -flow thereinto, of power from an
>e
source oípower, and a. load driven by
j » 4said prime mover, and variable speed power trans
.
mission
me
I
.= ~ :m
vintermediate
said
m
prime
mover and said load, m
adapted, when Vthe
prœsure causing the flow oi power into the prime
mover, drops below a- predetermined minimum, to
j lower the «iwf-«f ratio or
meets. a l ,Ja-r
1i. In
efe ated
by
e
sis>
.
er
i =» ~-~
.o n
l
~
me ation with a prime mover actu
the now thereintovof power „ from an
source oi’ powen'avload 'drivenby said
prime mover, and variable.. powerv trans
mission rnechenism intermediate ,said prime
mover and said load, and means'adapœd. when
the pressure causing the iiow‘o! power into 'the
e mover drops below a" prede
mini
`mum, or when the flow ci powerintm
mover ex speed a „o
muc of said
riii) >lower the
. me by the n
,
with
Y.r
i
~actu-
thereinto ci power' fromv
~ ternal source of power, and a load driven kby
prime mover, -and
le speed power
mission vm
intermediatesaid' prime
mover and seid load, means adapted, when thev
I ` pressure causing the tlow o! power into the'prime
.70
mtovarythespeedratiooi
to its minimum value.
i8. In combination' with an electric motor.' a
load driven thereby, and a variable speed power
transmission mechanism intermediate the motor
and the load; and means adapted, when the cur
rent flow into the motor exceeds a predetermined
maximum, or when the voltage causing said cur
rent flow drops below a predetermined minimum. 50
to lower> the speed ratio of said power transmis
sion mechanism to its minimum value.
’
19. In 'a power
on system in which
the ratio ot
n between the motor and
¿the load is variable, means for causing the ratio
to assume its lowest value, manually adjustable
means adapted tobe interlocked with said first
meanssoastopreventitstunctioning whenso
_,
:y
_
the transmission mechanism and means inde
pendent oi' said adjusting means adapted to be
come operative when the ilow of Vcurrent into the
motor exceeds a predetermined maximum, to
lower the speed ratio of said power transmissionY
ratio.
‘in
.
20
rent ilow into the motor exceeds a predetermined
maximum, or when the voltage causing said c_ur
rent ilow drops below a predetermined minimum,
mover;
to lowerdrops
the speed
belowratio
a of
»l said
-' ‘ I power'minimum.l
transmis f
sion _mecV to its
um value.
13. In combination with a prime-mover actu
interlocked and to permit manual adiustment oi'
,said ratio .interlocking means for effecting said
interlocking. and resetting means adapted to et- '
feet the interlocking after its interruption.
' 20. In a power
the ratio of
on system in which
on between the motor and
theloadisvariablameansiorcausingtheratio
its lowest value'.V manuallyadlustable
means
bey interlocked with said ürst
means so as -'to prevent its functioning when so
interlocked and _to permit manual adjustment or
said ratio, interlocking-means for effecting said 70
interlocking, and resetting means whereby the
ated by the ilow thereinto ofpower- froni'an- 4ex
interlocking may
be effected when it is
source of power, a> load drlvenbysaid interrupted,~ and said interlocking means being
;,~- mf- mover, ‘and variable .- we- ’ power trans->
`
movable inresponse to predetermined conditions
75
2,111,149
in the power line whereby power ñows into the
rocated by said yielding means in one direction
motor, so as to break the interlock.
21. In combination with an electric motor, a
and manually reciprocable in the other direc
load driven thereby, and a variable speed power
transmission mechanism intermediate the motor
and the load, a first means normally adapted to
lower the speed ratio to its minimum value, a
second means to prevent the action of said first
means, and a third means, effective when the in
10 ñow of current into the motor exceeds a prede
termined maximum, to render said second means
ineiîective, and thereby to cause said ñrst means
to lower the speed ratio to its minimum value.
22. In combination with an electric motor, a
15 load driven thereby, and a variable speed' power
transmission mechanism intermediate the motor
and the load, a first means normally adapted to
lower the speed ratio to its minimum value, a sec
ond means to prevent the action of- said first
20 means, and a third means, eiîective when the in
iiow of current into the motor drops below a pre
determined minimum, to render said second
means ineffective, and thereby to cause said first
means to lower the speed ratio to its minimum
25
5
f
value.
'
23. Control mechanism for a ratio changing
tion to reset said transmission and render said
electrically responsive means operable.
27. A ratio changing transmission comprising
manually operable means to vary the ratio of said
transmission and a control mechanism therefor
comprising yielding means to bias said transmis
sion toward its low ratio position and electrically
responsive means to render said yielding means 10
inoperative, together with resetting means re
ciprocated by said yielding means in one direc
tion and manually reciprocable in the other di
rection to reset said transmission.
28. A ratio changing transmission'comprising 15
manually operable means to vary the ratio of said
transmission and a control mechanism therefor
comprising yielding means to bias said transmis
sion toward its low ratio position and electrically
responsive means to render said yielding means 20
inoperative, together with resetting means re
ciprocated by said yielding means in one direction
and manually reciprocable in the other direction
to restore said transmission to its original ratio
position.
29. A ratio changing transmission comprising
transmission, said mechanism comprising yield
manually operable means to vary the ratio of said
i ing means to bias said transmission toward its
transmission a control mechanism therefor com
low ratio position, electrically responsive means
30 to render said yielding means inoperative, and
manually operable means to vary they ratio of
said transmission.
,
24. Control mechanism for a ratio changing
transmission, said mechanism comprising yield
2,#
prising yielding means to bias said transmission
toward its. low ratio position and electrically re 30
sponsive means to render saidv yielding means in
operative, and means for controlling the speed o!
ratio change effected by the' operation of the
yielding means.
'
30. A ratio changing transmission comprising
low ratio position, electrically responsive meansl manually operable means to vary the ratio of
to render said yielding means inoperative, and said transmission anda control mechanism com
manually operable means to vary the ratio o1' prising yielding means to bias said transmission
said transmission, together with resetting means toward its low ratio position and electrically re
sponsive .means to render said yielding means in 40
40 reciprocated by said yielding means in one di
rection and manually reciprocable in the other operative, together with resetting means recipro
direction to reset said transmission, and render cated by said yielding means in one direction,
manually reciprocable in the other direction to
said electrically responsive means operable.
25. A ratio changing transmission comprising restore said transmission to its original ratio po
sition and means for controlling the speed of 45
45 manually operable means to vary the ratio of said operation of the restoring means.
transmission, and a controimechanism therefor
31. 1n combination with a prime mover actuat
comprising yielding means to bias said trans
ed by the ñow thereinto of power from an exter
mission toward its low ratio position and elec
nal source of power, a load driven by said prime
trically responsive means to render said yield
mover, and variable speed power transmission 50
ing means inoperative.
f
50
26. A ratio changing transmission comprising mechanism intermediate said prime mover and
'manually operable means to vary the ratio of said said load, and means adapted, when the flow of
transmission and a control mechanism therefor power into the prime mover exceeds a predeter-mined maximum, to lower the speed ratio of said
comprising yielding means to bias said transmis
power transmission mechanism.
55 sion toward its low ratio position and electrically.
responsive means to render said yielding means
ALAIN MADLÉ.
inoperative, together with resetting means recip
35 ing means to bias said transmission toward its
Документ
Категория
Без категории
Просмотров
0
Размер файла
935 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа