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June 1, 1948.
M. N. YARDENY
2,442,739
DUAL CONTROL APPARATUS FOR CONTINUOUS AND FEE-SELECTED MULTITURN MOTION
Filed July 15, 1944
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J,
INVENTOR
ATTO R N EY
2,442,739
Patented June 1', 1948
UNITED STATES PATENT OFFICE
2,442,739
DUAL CONTROL APPARATUS FOR CON
TINUOUS AND PRESELECTED MULTI
'
TURN MOTION
Michel N. Yardeny, New York, N. Y.
Application July 15, 1944, Serial No. 545,124
9 Claims. (01. 318-31)
My invention relates to control apparatus and
has particular reference to control apparatus em
ploying drive means and control elements for
placing a useful load in a desired position.
One important feature of my invention is to
provide a control apparatus comprising two con
trol units which can be used selectively for either
for applications for moving a useful load through
a certain distance where several revolutions must
be made by the driving member. Such an opera
tion may be required, for instance, for tuning a
radio receiver by varying inductance of a coil, for
which purpose an iron core is moved in or out
of the coil, a suitable screw mechanism being
employed for moving the core. The screw must
placing the useful load in one of several prede
be then given a predetermined number of revolu
termined positions or in any desired position.
The movement of the load is preferably effected 10 tions for moving the core to a desired position.
The predetermined position control is used in
by a rotary drive means, preferably including an.
electric motor, by which any angular displace
ment may be imparted to the load. The total
range of the movement of the load driving shaft
may be from a fraction of one revolution to sev
eral revolutions.
Another feature of my invention is to provide
such a case for rapidly tuning the receiver to one
of the several de?nite frequencies, and the con
tinuous movement control is used for turning the
15 receiver to any desired'frequency.
The prede
termined position control is more rapid and auto
matic and is preferred when the receiver is used
for a few often used frequencies.
means to vary the speed of the driving means
Other important advantages, objects and fea
such as a motor in the different stages of the
movement as, for instance, to advance the load 20 tures of this invention will be apparent from the
perusal of the accompanying speci?cation and
more rapidly in the ?rst stages of its movement
which may require a number of complete revolu
drawings in which—
Fig. 1 is a diagrammatic view of my apparatus
tions of the load shaft, or to reduce the speed of
the driving motor during the last stage of the
showing the arrangement for operating the load
movement when a fraction of the last revolution 25 motor by the use of two control units or trans
is traversed by the load shaft in order to facili
mitters,’ one of which is used for placing the load
tate the stopping of the driving means when the
in one of several predetermined positions, the
exact position of the load is reached.
other being used for placing the load in any de
sired position;
Another feature of the invention is to provide
Fig. 2 is a similar view of a simpli?ed system;
means to reduce the speed of the driving means 30
or the motor still further in response to a reversal
Fig. 3 is a detail view of control elements; and
Fig. 4 is a fractional diagrammatic view of a
of the direction of rotation of the drive means,
resulting from an overrunning of the stopping
modi?ed control apparatus.
position by the control elements because of in
My control apparatus comprises two control
ertia of the moving parts.
35 units, and a receiver motor I connected by a suit
Still another feature of the invention is to pro
able transmission such as a shaft 2, a set of gears
vide means to reduce the speed of the motor or
3, 4 and a shaft 5, to a useful load 6.
drive means when the unit for placing the load
The ?rst control unit, for placing the load in
one of several predetermined positions within a
in any desired position or for continuous or “fol
low-up” control is used, thereby facilitating the 40 range from a fraction of one revolution to several
accurate movement of the load to the desired
revolutions includes a plurality of selectors, each
position, While the ?rst unit, for placing the load
automatically in a selected predetermined posi
selector comprising two pairs of control elements,
therefore operated at different speeds, depending
practice. The selectors comprisediscs 8, 9, l0,
only two such selectors being shown on the draw
tion, can be used with a motor running at a much
ing for the sake of simplicity. However, any re- ,
higher speed. The drive means for the load is 45 quired number of pairs may be employed in actual
ll, etc. One element of each pair comprises a
pair of metal segments l4, l5, I6, I‘! mounted
on the discs 8, 9 separatedby gaps l8, IS. The
automatic predetermined position control, and 50 other discs l0 and H support metal segments 22,
considerablyreduced speed may be used for a
23 separated by a gap 24, and segments 25, 26
short time during the process of stopping the mo
separated by a gap 21. The discs are suitably
supported at the periphery but can be rotated
tor, as means for preventing motor oscillations
or hunting.
'
to adjust the relative positions of the gaps, for
My dual control system is particularly useful 55 which purposes the discs are engaged by frictional
on the control unit used. Thus, for instance, a
moderately reduced speed may be used for the
continuous movement control, full speed for the
24,442,739
or other pinions 28, 29, 30, 3I mounted on shafts‘
32 which can be manually rotated for placing the
discs in any desired position. The segments I3,
I5 and 22‘, 23 are engaged by contact arms 35,
33 mounted on the shaft 5, the contacting por
tions of the arms being sui?ciently wide to bridge
the gaps between the segments. The arms are
connected by leads I2, I3 and a switch 23 to a
. 1f",- m
ing shaft 5. The roller I23 is mounted on a shaft
I25 frictionally engaged by a block I28 with a
?nger I29 normally held by the rotation of the
shaft I25 against one of two stationary posts or
stops I35, I3I depending on the direction of the
rotation. The end of the ?nger I29 is provided
.
with a contact roller 01; ball I32 which connects
together resilient contact points I33, I34 or I35,
a
,
I33, depending on the position of the ?nger I29.
The segments I4, I5 are connected by leads 33, 10. The points I34, I33 are connected to the lead III
33 and switches 33, 34 with the ends of relay coils
and the points I33, I35 are connected to a lead
3%, iii. The segments 22, 23 being connected to . Md which isV-con'nected by a switch IIII to the
the coils by leads 50, 5! and switches 31,521 The
»leadf5§I.' rT-fhe'fgfojvernor therefore is operatively
lead 88.
other ends of the coils are joined together and - , included in the motor circuit only when the mo?
connected by a lead 43 to a contactpoint ddnor 15. tor is reversed and during the time when the re
mally engaged by a relay arm 35. The'arm E5 is
versing switch arm. I29 moves from one of the
connected by a lead 43 to a second arm‘ '47 nor; ' ‘
stops .‘I733,fiI3I"to the other.
mally engaging a contact point 48 connected by.
The governor performs a very important func
tion of preventing or suppressing any tendency on
va lead 33 to a lead 54. The latter is connected to
'
a terminal 55 of a source of current 56 through a 20 the part of the motor to. oscillate or hunt when
Switch 5?:- The relay 00.11538, 41! Operate relay
contact arms 5,8, 5| connected together by a lead
32, and also contact arms 63, ‘64 connected to
gether by a lead I55. The arm 33, normally en
gagesia contact point 58 connected’ to a lead 59
extending at one end to} a contact point 73 nor
mally engaged by a relay arm ‘II. The other end
Of lead 69. is cqnnectedto one end of a field Wind
ing'l'2 of the motor I, the other end of the winding
being’connected to one brush of an armature ‘I3
of the motor I and to one end of a, second ?eld
winding ‘I4. The two windings are used alter
natively for causing the motor to rotate in one
or the other ‘direction. The other end of the
winding ‘I3 is connected by a lead T5 to a lead ‘I5,
one end of which is connected to a contact point
'i’? normally engaged by the arm 6;!‘ of relay ‘SI,
the other end being connected, to a contact point
the control elements’ reach ‘a ‘stopping position,
i- 6» a position in. which a Slight movement to
one or the other side causes reversal of the mo:
tor rotation; , The'eovefnqt by maieriaHszmiuc
25
ing the motor speed and weakening‘ its torque,’
reduces the, inertia of the moving parts to such
an extent, that the control, elements can no longer
overrun the stopping point and the motor is
stopped, usually after the first reversal of its ro
tation.
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The segments “4;,15; 22;, 23 control: the rota
tion of the load shaft 5 within a range of about
one half of one revolution inr'either direction, the
35
Second set of the segmented; 1:1 811201.25; 26 being:
used for controlling complete‘revolutions of the‘
load shaft. The segments I6, I‘I, etc, are engaged
by contact arms I45, I'lii‘econnected‘by leads‘j I41,
IdS-to thelead I2. The arms I45, I 33' are mounted‘
‘I8. normally engaged; by, an arm 85'. The: arm 53
on a shaft I59 connectedby alsuitable transmis
oi relay Git normally engages a‘ contact point, ‘I3 40 sion I5I withthe shaftf5._ This transmission is‘ of
connected by a lead 8| to‘the lead ‘I5, The arm
a relativelyhigh ratio. for’ allowing the shaft 5_
6!; of relay 4] normally engages a contact point
connected we. Lead 9.1 which in turn, is 00n
neoted ‘to lead‘ 63.
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>
The contact arms 55!", 3,3kwhen. attracted by coil.
43, engage. contact points. 8.3. 82- The. point 8.315.
connectedby a lead 85, to. alead 8.6. connectedvby
45
segment to the middle of the, gap while the. 0,017
responding contactarm 35] or .36‘ on, thejshaft 5‘
a switch 8?, lead 88 and switch 89 to the terminal
35 of the sourcei?, The point 82, is‘ connected
through. a lead 8.4» anda resistor 92. to a lead 9!
extending from the other brush of. the armature
completes approximately one half of one revolu
tion.
50
‘E3. The arms 6|, iidwhenattractedjby relay 4i,
engage a point95 connectedtollead aiand ‘a point
33;oonnected to lead 83 respectively. The arma
ture ‘I3 is connected to the vother'terminal 55 of,
the source of current through a speed regulating
governor I33 having any insulation base IilI
mounted for‘rotation 'on‘an extension of the ar
connected by a‘ lead “18\ andv a, switch IGBto the
lead 54. Theendsof the springs or spring,‘ por
tions I32, I 32? normally, engage contact points
IIZ, I ‘I3; connected to collector ringsv II4, II5,1‘e-,
spectively. The ringv llllisengaged by a brush
I;I,3‘an(1.<10nn€ct€d,by alead I I‘! to the lead SI,
Thering IE5 is'engaged by
brush'II8', con
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The segments‘ I16, Ii?are connectedgtothe ends
of relay coils I52, I53. by‘ leads I_5_4',_I55 and
switches I53‘, I51“. The segments 25, 26 aresimi
larly connected with these coils by leads. I60;
I 5 I, and switches I62; I63. The joined ends of the
55 coils are connected by. a. leadl?fl; tothe lead54;
, The switches33;>34l; I55, and. I_5_'Ij are arranged
to be‘ simultaneously. operated‘ by ajcommon
handle I34, asimilar handle I65 being provided.
for the simultaneous operation ofjjtheswitches
mature shaft 2, '
A contact spring, comprising two portions, I32,
E32] is mounted onapOst I03 on the base IE], of,
the governor, the'post being connected to a col-'
lector ring I54, engaged by ‘a contact brush I55,
to make a plurality of revolutions for one revolu
tion of’ the shaft, I5Il. >Also,_._thc' gaps‘, {9, 27' are.
made relatively Wide in such manner. that the
contact arms [35017 I 5'36; move from the edge of a
60
3151162133..
_ The relay, coils I52,1I53
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controlitherelayfcon
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H
tact arms 35, A]; which engage dead‘, or blind
65
points’ I68,’ I33 when attracted‘, and the relay
contact arms 1], so whichwhenattracted byzthe
coils, engage contactpoints, I’III; ITII; connectéd‘
with the leads.85,'_8ji. and 20,9. .
, _
._
_
.
The operation‘ of 'thepreviously describedunit,
which for convenience“ may be,_oalledi“mu1ti-_
revolution predetermined position control; unit,”
is asfollows:
‘j
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g‘
_
nected by alead' II 3_ to thelead5n4. Thegovernor
isgnermally rendered ‘inoperative. by, beingby
passed ‘or‘short eircuited by a reversing ‘switch I 22,
lect-or-discs ‘Ill; II, towdov this the corresponding
' compl'risine a. roller 01: disc I523“. friqtilqnallror
switches 31, 52, I62, I63 are closed by thejhandle‘
otherwise engaging a wheel I24; on the load~driv
Assuming that ittisrdesiredjtonplace theload ET
in anew: Position; cqntrolled’ by: therair 9? Se.
I65. Since both the-contact‘ arms 36, I43 engage
2,442,739
the corresponding segments 22, 25, the relay coils v
will be energized as follows: current from the
terminal 90 of the source 56 will flow through
the switch 89, leads 88, I2, I41, I48 to arm I46,
from there over segment 25, lead I60, switch I62,
lead I54 to coil I52, then back through leads I61,
54 and switch 51 to the other terminal 55 of the
reached by the contact arm 36. One of such
devices comprises a frictional sliding reversing
clutch I80 of conventional design. Another ar
rangement for suppressing hunting comprises
the governor or rotary interrupter I00 which be
source 56. As a result, the coil I52 will be ener
comes temporarily operative for greatly reducing
the motor speed after each reversal of its rota
tion when switch I22 previously described be
gized, ‘attracting the relay arms 45, 1I.
comes active.
This
will disconnect the circuit from the lead 43 to 10
the relay coils 40, ,4I, rendering them inopera
tive regardless of the position of the contact arm
The switch I09 which may be operatively con
nected with switches 81, 208 or I4I obtain the
lowest speed of the motor after the reversal there
by effectively preventing the hunting of the
motor when the contact arm bridges the gap.
I, however, will be energized, current passing from
The second control unit, shown at the right
the terminal 98 through the switch 89, lead 88, 15
of Fig. 1 is used for placing the load 6 in any
switch 81, leads 86, 85, point I10, contact arm ‘II,
desired position by rotating the shaft 5 through a
lead 84, contact arm 80, point 18, leads 16, 15,
number of revolutions and a fraction of the last
motor winding 14, armature 13, lead 9|, closed
revolution. This unit which may be called a
reversing switch I22, lead I40, switch I4I, lead
7 36 in relation to the segments 22, 23. The motor
54 and switch 51 to the other terminal 55 of the 20 ‘.‘followup” or “continuous control” unit, com
prises a disc I85 suitably mounted for rotation
on an axis concentric with a shaft I86 support
The motor will therefore rotate in a direction
ing a contact arm I81. The disc, preferably
for moving the contact arm I46 toward the gap
made of an insulating material, mounts metal
21. The shaft 5 will make several revolutions
before the contact arm I46 reaches the edge of 25 segments I88, I89 separated by a gap I94 and
connected to collector rings I90, I9I. The latter
the segment 25, disconnecting the circuit for the
are engaged by contact brushes I92, I93 con
relay coil I52. The coil I52 being deenergized, the
nected by leads I96, I91, to relay coils I98, I99
contact arms 45 and H will be released. The arm
and by leads 202, 203 to the ends of the relay
45, engaging-the contact point .44, will close the
circuit for the relay coil 40. Current will now 30 coils '40, M. The joined ends of the coils I98,
I99 are connected by a lead 204 to the lead 54. ~
flow from the terminal 90 through the switch 89,
The contact arm I81 is connected by a lead 205
leads 88, closed switch 20 and lead I2, I3, con
to a point 206 of the switch 81 and to a point 201
tact arm 36, segment 22, lead 50, switch 31, lead
of a switch 208 connected by a lead 209 with the
38, coil 40, lead 43, contact point 44, contact arm
45, lead 46, contact arm 41, point 48, leads 49, 85 lead 86.
The disc I85 is engaged by a pinion 2I2, fric
54, and switch 51 back to the other terminal 55
tionally or otherwise, the pinion being mounted
of the source 56. The energized coil 40 will at
on a shaft 2I3 extending from the armature 2I4
tract the contact arms 60, 63, thereby establish
of a motor 2I5. Any suitable reversible motor
ing the circuit for the motor I as follows: from
source 56.
the terminal 90, switch 89, lead 88, switch 81, 40 may be employed for this purpose, and a motor
with a permanent magnet 2I6 is shown by way
leads 86, 85, point 83, contact arm 60, lead 62,
of an example, The armature is connected by
contact arm 6|, point 11, leads 16 and 15, winding
leads 2I8, 2I9 with relay contact arms 220, Ml,
14, armature 13, lead 9I, reversing switch I22,
normally engaging contact points 222, 223 con
lead I40, switch I4I, lead 54, switch 51, and the
nected by a lead 224 to the lead 54. The contact
other terminal 55 of the source of current 56.
arms, when attracted by the energized relay coils,
The motor therefore will continue its rotation,
I98, I99 engage contact points 225, 226 on a lead
moving the contact arm 36 toward the gap 24,
201 connected to the lead 205.
until the arm 36 bridges the gap, energizing both
The operation of the follow-up unit is as fol
the coils 40, M and deenergizing the motor I for
50 lows:
stopping the same.
Before starting the operation of this unit, all
To facilitate the accurate stopping of the
the switches of the predetermined position unit
motor in the ?nal position, the motor speed is
must be opened. The switch handles I64, I65
reduced ‘during the last stage of the opera
may be for this purpose connected together by a
tion, i. e. when the shaft 5 completes the last one
link 228 operated by a rod 229 with a handle 230.
half revolution under control of the contact arm
The same rod 229 may be conveniently connected
36. This reduction is accomplished for example
to the switches MI, 208 and 81 so that simul
by increasing the strength of the motor magnetic
taneously with the opening of the switches of
?eld, for which purpose the second winding 12 is
the ?rst unit, the second unit will be connected
also energized by current passing in a direction
causing an increase of the strength of the ?eld 60 for operation as follows: the switch 81, will dis
connect lead 86 and the motor line 85 and will
produced by the winding 14. This additional
connect the lead 88 with the lead 205 through
connection is effected by the contact arms 63, 64
point 206 for energizing the relay coils I98, I99
as follows: current passing through the winding
through arm I81 and segments I88, I89 and for
14,, at a point of connection to the armature‘13,
energizing or rendering operative the control
branches out and ?ows in a direction opposite to
motor
2I5; the switch 208 will connect the lead
the normal, through the winding 12, leads 68
205 through point 201 with lead 209 and thelead
85 for energizing the motor I; and the switch
-I4I will disconnect the lead I40, rendering the
lead 9|. The resistor 92 reduces the current
through the second winding 12 to prevent its 70 reversing switch I22 inoperative thereby ren
dering the governor I00 continuously operative.
overheating and to obtain the desired ?eld char
It should be noted that although it is desirable
acteristics.
to reduce the motor speed for the operation of
Additional devices may also be provided to sup
the follow-up control unit, the motor speed for
press or prevent the motor from oscillating or
the operation of the follow-up control unit, the
hunting back and forth when the gap 24 is
and 91, point 96, contact arm 64, lead 65, contact
arm 63, point 82, lead 84, resistor 92, and to the
2,442,739
:iznotor ,. speed should :be preferably materially
:etersasshown on thadrawing. Twosuchmetei‘s,
higher than the verylow. ‘speed required for the
I245, 246, may be used, one accurate reading :of
stopping Of the motor ‘for preventing its ‘hunt
fractions of one revolution, the other for indicat
ing complete revolutions. , The ‘meter 2'45 isloon
nected by a lead 241 ,withra-contact arm 248iof a
gin-g. To increase the limiting-speed of thegov- .
ernor, the switch W9 is‘ closed thereby render
:ing. thegheavier spring 1102 operative. > A lighter
‘potentiometer .249, and by ,alead 250~with an ad
p-justableresistor 2.5-}, for adjusting the zeropoint
weight may‘wbe used, of course; instead 10f ‘the
heavier :spring on the medium speed side ;of the .
governor
spring.
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of the meter. The potentiometer is connected by
leads 253, 2511 with the leads 54 and 18.8 respec
tively. The contact arm 24B is mounted directly
.
It isa-lso possible, if desired, to leave the revers
ing switch I22 operative ior both units of con
.on' the shaft .5 and makes the same number ,of
trol, ‘using only the switch 409 vfor reducing the
.revolutionsas the latter.v One terminal of .the
:motor speed when the second unit is in oper
‘meter 2% is connected by ‘a lead 2-56 with a-oon
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tact arm 25‘! of (a second potentiometer 2.58, the
Assuming that it is desired to ‘rotate the shaft 15 arm 25:? being connected by a suitable transmis
:5 to the right, the contact arm -I 81 is turned to
sion 2-63 with the shaft 5, the transmission pref
thought, either manually, as;by"operating'a~knob
erably has :the same ratio as the transmission
‘2.35, or by other suitable means. ,Current will
t5l, so that the meter 246 will indicatezcoinplete
then flow from the terminal 190 through the
revolutions ‘of the shaft 5, while the meter .245
ation.v
‘switch '89, lead:88, switch B7,;point 206, lead 5295, 20 ‘will indicate fractions .of one revolution. The
{contact arm E81, segment 1:89, ring 19!, brush
other terminal of the meter 246 is connected by
1:93, lead ‘I91, icoil I89, ‘leads ‘204, -54_, and switch
.alead?tl .with a zero adjustingresistor 262.. The
:5"! to the other terminal v:55. ;'~I"he energized coil
potentiometer 255 is connected with the leads
Hi9 willattract'the relay contact arm 22!, clos
253, 4254.
ing ‘the circuit for the motor armature ~2I4 .25
through the terminal '90, iswitch=89, -lead‘~8vB,-switch
‘87., ‘point 206, leads 205, 201,;point2-26,contact ‘
.arm'22l, lead 219, armature 214, lead 2l8, con
.tact arm 220,.point 22.2,and leads I224, '54 to .the
other terminal \55 through the switch 51. 80
The motor will rotate thezdisc 1-85 for causing the
gap 194 to follow the'arm 181. The motor 2-15
:will continue to rotate as dong ‘as the contact arm
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The governor may :be omittedas shown in Fig.
2 which represents a simpli?ed system. Single
pole double throw relays can .be used instead of
.double pole relays because no provision for .re
:ducing' the motor speed is needed. The motor
windings and the armature ‘will be then directly
connected to the source of current as shown.
A single indicator 2'25 [may .be used operated‘
by the potentiometer 249, (the contact arm .248
being connected by .a suitable transmission 260
to the load shaft -5. The indicator is then
calibrated to indicate complete turns (orhalf
51.8’! is in contact with. thesegment 189. To
facilitate this operation and to make ‘it more
‘rapid, the contact arm l~8l with its ballcontact
3-258 ‘may be quickly moved to a position shown
turns) and tractions of one turn.
‘in dotted lines in Fig. 3:behindva raised portion
the {systems shownwin Figs. 1 and 2 the gaps
24.] of the segment .‘l-tdwhich will .retain-the-arm
t2, 2i arewider than the contact :arms M5, .145
1.8?! by friction and will cause the arm to be
so that ‘the circuit for the relays \552, 153 is ,dis
rotated together with the disc J85, :making as
connected when a gap “or 2.?! is reached by the
.many revolutions :as may ‘be desired. To stop
‘corresponding arm. It is ‘also possible, however,
the motor-itis:onlyenecessary'totake hold of the
to voperate the device when the gaps 49, 21 are
~knobi235 and stop it by hand until the ‘motor,
narrow and are abridged by the corresponding
:overcoming the resistance of the raised portion
arms. Such an arrangement is shown in Fig.4.
:Z'itl, brings the gap t8 into-engagement'with the
'The gap 59 is relatively narrow vbetween the .seg
:ball 268a't the end of the contact arm.
ments to, ELI-the contact :arm 145’ :having a
The relay coil 41 will also be;energized-through
contact end .1280 of such a width that it :bridges
a connecting lead 203, :attractingthe relay arms
;the;gap t9 and can 'be moved for a distance cor
ill and 64, causing the motor I to be energized 50 responding to 180° of movement iofrthe arm ~35
.as was explained above. The control segments
of Fig. 1 while bridging the gap.
.
sof 1the ‘?rst :or predetermined position unit being
f-Ilhe onlyotheridifference in the connection is
‘adisconnected, the motor 1! will rotate underpthe
that the relay arms 155,141 normally engage :dead
'TCDl'llTL'OlOf the second or follow up unit and will
points H38, H53 and can energize ‘the relays 40,
rmakettheidesired number'of revolutions until it 65 A1, Fig. -1, ‘only when both the arms 745,714‘! are
‘is ‘stopped by. holding the knob ‘ 235 .and prevent
attracted ‘by the energized coils H52, 415?» when
ing‘zitsriurther rotation, thereby allowing the gap
4941170 be bridged by the contact‘arm I87, Both
"the arelay coils il 98, 1933 will "be energized, causing
thezgap 5-9 is bridged.
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it wiiLbe understood that various lfeaturesand
principles of each of the embodiments-of the
~the;arms "22B, ‘221 to be attracted as" well as the .60 ‘invention above described -or referred to ¢may be
yarmsi??lf?'l :an'di63,'64 of the relays 40, Al. The
‘utilized or substituted in other embodiments.
:armaturel2lj4 :of the control motor 245 will be
While the invention ,has been described in
.:short vcircuitedand dynamically braked by the
'aper'manent magnetic ?eld. The motor I 'will be
:deenergized and also stopped .as was :explained
above;
.ilnaview'of the fact that the second :or follow
[detail with-respect totcertain particular ‘preferred
examples, it will vbe understood by ,those skilled
in-the art after understanding the invention,
‘various changes and {further modi?cation may
the-made without departing irom the spirit and
Lup‘setpf‘the ‘control elements controls-only the V
v:scope of‘the ‘invention, and :it is ‘intended ithere
. starting andstoppingof the shaft ‘ but ». does- not
rfore1in the appended :claims to :cover .all such
indicateits position, it 'isdesirable to have an 70
:in‘dicating device at ‘the point of ‘ control which
.‘llldi'at is claimed as ‘new ,and desired to :be
qchangesandmodi?cations.
~'fivilliindicaterthe‘true:position of the “load '6 or
L-ehaft :5. .‘Any suitable indicators may :be .used
:iorsthi's purpose such :as :electric meters of a
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secured by Letters Patents is:
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1. ._A l-controlapparatus 'for placing .:a load in
:a selected zone of a plurality of predetermined
am‘illivoltmeter "type :connected ‘with potentiom .75 :positions or-‘in any desired position comprising
2,442,739
9
driving means adapted to operate a useful load; a
reversible motor operatively connected to the
driving means; ?rst electrical control means
comprising a plurality of sets of control ele
ments connected in a circuit with the motor,
each set comprising two pairs of control elements,
one element of each pair being movable and
10
control members and to stop the motor in any
desired position of the driving means in response
to the control members reaching a predetermined
relative position; switch means to selectively
render one of the control means operative; ?rst
means to reduce the speed of the motor to a
relatively low value, second switch means ar
ranged to render the speed reducing means
operatively connected to the driving means;
operative for a limited amount of movement in
transmission means connecting the movable
response to the reversal of the motor, and in
elements of each set for moving the same at
response to the ?rst control means being rendered
diiferent ratios of speed; switch means to selec~
operative by the ?rst switch means; second’
tively energize one of the sets; electrical means
means to reduce the speed of the motor, the
connected with the motor to control the direc
second speed reducing means being arranged to
tion of the rotation of the motor by the relative
position of the control elements of the selected 15 reduce the speed to a relatively higher value than
the ?rst speed reducing means; and means to
set and for causing the driving means to com
render the second speed reducing means opera
plete a total movement within a range from a
tive for the purposes aforesaid in response to the
fraction of one cycle of movement of the driving
second control means being rendered operative.
means to several cycles of movement and to stop
3. A control apparatus for placing a load in a
the motor in response to the movable control 20
selected one of a plurality of predetermined posi
elements of the selected set reaching a predeter
tions, or in any desired position comprising driv
mined position in relation to each other and to
ing means adapted to operate a useful load; a
the other control element of the respective pair
reversible motor operatively connected to the
thereby placing the driving means in the selected
driving means; ?rst electrical control means
predetermined position; second electrical control
comprising a plurality of sets of control elements
means comprising a pair of independently mov
connected in circuit with the motor, each set
able control members connected in the circuit
comprising two pairs of control elements, one
with the motor; drive means to move one of the
element of each pair being movable and opera
tively
connected to the driving means; trans
30
mission means conneoting the movable elements
trol the motor by'the relative position of the
of each set for moving the same at different ratios
control members and to stop the motor in any
of speed; switch means to selectively energize one
desired position of the driving means in response
of the sets; electrical means connected with the
to the control members reaching a predetermined
motor to control ‘the direction of the rotation of
relative position; switch means to selectively
the motor by the relative position of the control
render one of the control means operative for
elements of the selected set and for causing the
the purpose aforesaid; means to reduce the speed
driving means to complete a total movement
of the motor; and second switch means arranged
within a range from a fraction of one cycle of
to render the speed reducing means operative for
a limited amount of movement in response to the 40 movement of the driving means to several cycles
of movement and to stop the motor in response
reversal of the motor.
to the movable control elements of the selected
2. A control apparatus for placing a load in
set reaching a predetermined position in relation
a selected one of a plurality of predetermined
to each other and to the other control element
positions or in any desired position comprising
of the respective pair thereby placing the driving
driving means adapted to operate a useful load;
means in the selected predetermined position;
a reversible motor operatively connected to the
second electrical control means comprising a pair
driving means; ?rst electrical control means
of independently movable control members con
comprising a plurality of sets of control elements
nected in a circuit with a motor; drive means to
connected in a circuit with the motor, each set
comprising two pairs of control elements, one 50 move one of the members, the other member be
ing movable by other means; electrical means
element of each pair being movable and opera
connected to control the motor by the relative
tively connected to the driving means; trans
position of the control members and to stop the
mission means connecting the movable elements
motor in any desired position of the driving
of each set for moving the same at different
means in response to the control members reach
ratios of speed; switch means to selectively
ing a predetermined relative position; switch
energize ‘enact the sets; electrical means con
means to selectively render one of the control
nected‘with the motor to control the direction
means operative; a governor operatively coupled
of the rotation of the motor by the relative posi
with the motor for controlling the speed thereof;
tion of the control elements of the selected set
and for causing the driving means to complete 60 contact means in the governor responsible to the
centrifugal force and arranged to control the
a total movement within a range from a fraction
electrical motor connections; and means to ren
of one cycle of movement of the driving means
der the governor operative for the purposes afore
to several cycles of movement and to stop the
said in response to the second control means
motor in response to the movable control ele
being rendered operative for maintaining the
ments of the selected set reaching a predeter
motor speed at a predetermined limit.
mined position in relation to each other and to
4. A control apparatus for placing a load in a
the other control element of the respective pair
selected
‘one of a plurality of predetermined posi
thereby placing the driving means in the selected
tions or in any desired position comprising driv
predetermined position; second electrical control
members, the other member being movable by
other means; electrical means connected to con
means comprising a pair of independently mov
able control members connected in the circuit
with the motor; drive means to move one of the
members, the other member being movable by
other means; electrical means connected to con
trol the motor by the relative position of the
70)
ing means adapted to operate a useful load; a
reversible motor operatively connected to the
driving means; ?rst electrical control means
comprising a plurality of sets of control elements
connected in a circuit with the motor, each set
comprising two pairs of control elements, one
111"
2,442,239
element ‘of each. pair being ‘movable and operativehr connected to the driving means; transmis
siorr‘ means connecting the movable elements of
each. set for moving the same at different ratios of
speed; switch means to selectively energize one of
12
in the ‘selected predetermined position; second
electrical control mean-sarranged to. control-the
motor’ for placing the‘ driving means in any-‘dee
sired position, saidsecond control mean-scorn
prisi-ng- a pair of'independently movable control’
the. sets; electrical means connected with a motor
members connected in‘a circuit with the motor;
to control the direction. of the rotation of the
means to move one-‘oi’ the: members, the other
motor by the relative position of the control
member being‘movable by other means; electrical
elements of the ‘selected set’ and for causing the
driving means to ‘complete a total movement 101 means connectedtocontrol the motor by the
relative position of thevcontrol members: and'to'
Within a range from a fraction of one cycle of
stop
the motor
‘any :desired position: of the
movement of the driving means to several cycles
driving means in response to" the: control members
of‘movement and to‘stop the motor‘ in response
reaching a predetermined, relative ‘position; and
to the movable control. elements of the selected
switch means to selectively render one of: thereon;
set reaching a predetermined position in relation
trol means operative for the purposes "aforesaid
to each other and to the‘ other control elements
6. A control apparatus ‘for placing the load in
of the respective pair thereby placing the driving
a
selected one of a "plurality of predetermined
means in the selected predetermined position;
positions or ‘in any‘ desired position comprising
second electrical control means comprising a pair
of independently movable control members con 20I driving‘ means adapted to operate a useful load;
a reversible motor for operating the‘ driving.
nected in ‘a, circuit with the motor; drive means
means; ?rst electrical control means comprising
to move one of the members,the other member
being: movable *by other means; electrical means
connected "to c'ontrol‘the motor by the relative
position of the; control members and to stop the
motor in any desired position of the driving
means, in response to they control members reach
ing a‘ predetermined relative position; switch
means, to selectively render one of the control
means; operative: a: centrifugal governor opera
tively coupled with the motor; two sets of con
tact elements 'in the governor electrically con
n'ected'with the motor‘ and arranged‘ to‘ maintain
the.- motor speed at two. different limits; switch
means to include one set' of the cbntact elements
inithe motor circuit in response: to the second
control‘ means being rendered operative; and
switch means to in'clu'de'the other set of the con
tact elements 'in the motor circuit for a limited
amount ‘of movement in response to a‘reversal of
the‘ movement of the-motor and‘ in response to
the ?rst control means being rendered operative.
5', Aicontrolé apparatus for placing a load in a
selected; one of a plurality of. predetermined posi
tions: or in any desired‘7 position comprising rotary
driving means adapted to operate a useful load;
a reversible motor: operatively connected. to the
a plurality of sets of. control ‘elements? connected.
in a circuit with: thefmot'or, each set comprising"
two pairs‘of‘ control elements, ‘one element of'each
- pair comprising ‘conducting members separated‘
by a gap, the other element offeach pair compris
ing a contact member‘i‘or engaging ‘the. conduct
ing members, one element» of each ‘pair being‘
movable,’ transmission ‘means operatively con; '
necting the driving means ‘with the movable elee;
ments of each set for moving the same at dif
ferent' ratio of speed; switch means to selectively‘
energize one set oi'gelements; relay’ means 'con
nected withv the control elements to con-trolthe
direction of rotation of ‘the motor by the positions
of the contact members? relative to the neutral
points; contact means‘ ‘controlled by the relay
means to render one pair‘ or the selected- set op
erative and thelother pair inoperative for caus
ing the driving means to complete they first stage
of the total movement of the drivingmeansi said
stage- being within a range from afraction of
one revolution to " several; revolutions, and’ to
render the first mentioned pair inoperative in‘:
response to the contact member of the ?rst mentioned pair reaching the _ corresponding gap;
means to- render’ the second" mentionedrpai'r' of
driving ‘means; firstv electrical control means
the selected set operative for causing the driving‘
comprising two pairs of‘ relatively movable con
trol elements connected in a circuit with the 50 7 means to complete the second stage‘; of the total
movement comprising a, fraction of' one revolti
motor; oneéelement '01" each pair comprising con
tion
thereby placing the driving means in ‘the
ducting means having a‘neutral‘ point, the other
selected
predetermined position: second elec
element. of' each pair‘ comprising a contact mem
trical" control‘ means arranged to' control the
her for: engaging the conducting means, and one
motor for placing‘ the driving means in any de
element. of‘ each! pair being movable by the driv-r
sired
position, said‘ second control meansvcom
ing means; relay means connected with the con
prising independently movable control‘ members
trol5 elements to control the direction of rotation
connected in a circuit with'the motor; drive- 7
oi’ the ,motor by the positions of the contact
means
to move one of the control members; the
members relative. to, the neutral points; contact
other control member'bei'ng arranged to be movedv
means controlled‘ by the relay means to render 60 by
other means, one of the control members com
one pair of the control elements operative and
prising
conducting portions separated by a gap;
the ‘other’ inoperative for‘ completing the ?rst
the
other
control member comprising a contact
stage. of the-total movement of‘ the driving means
arm for engaging the conducting portions; means
for placingv the driving means in the predeter
to control the direction of motor rotation by the
mined pcsiti'onwithin a range from a fraction of
, position of the contact‘ arm at one or the other
one ‘revolution- ‘to several’ revolutions of the drivé
side of he gap and to stop the motor in response
i'ng' means, "said contact means being further
c'onnectedto render-‘the ?rst mentioned pair in
operative and the second mentioned pair opera
tive in response to the contact member of the
?rst mentioned pair reaching the corresponding
neutral point for causing the driving means to
complete the second? stage of the total movement
comprising a fraction of one revolution of the
driving means thereby placing the driving means
to the contact arm bridging the gap‘; means on'
the conducting‘ portions to yieldably retain- the
contact arm on one of the. conducting portions
for
the amember
commonoperable.
movement
by of
said
theother
members
means is
stopped; and‘ switch means to: render one of: the
control means operative.‘ and: the other control
means inoperative for thepurposes aforesaid;
7. In a system‘ for; positioning a. load to; a se
2,442,739
13
lected one of a plurality of predetermined posi
tions or to any desired position, in combination,
14
rotation; and switch means selectively operated
to place the load motor under the control of the
?rst control device or under the control of the
second control device, said switch means render
ing the speed reducing means continuously op
erative when the load motor is under control of
the second control device.
9. In a system for positioning a load to a se
lected one of a plurality of predetermined posi
tions or to any desired position, in combination,
a reversible motor for moving the load; a control
device comprising a plurality of selectors, each
mined number of revolutions through which the
selector including a unit for causing the load to
load is to be moved, the member of the partial
be moved through one or more complete revolu
revolution unit being adjusted to an extent de
tions and a unit for causing the load to be moved
pending upon a predetermined partial revolution
through a, partial revolution, each unit having a
through which the load is to be additionally
member adjusted to cause movement of the load
moved, the said complete revolution unit being
in a predetermined direction, the member of the
energized to move the load in the said predeter
complete revolution unit being adjusted for a
mined direction with the said predetermind num
ber of complete revolutions, and to energize the 20 number of unit distances equal to a predeter
mined number of revolutions through which the
said partial revolution unit to continue load
load is to be moved, the member of the partial
movement in the said predetermined direction
a reversible motor for moving the load; a control
device comprising a unit for causing the load to
be moved through one or more complete revolu
tions and a unit for causing the load to be moved
through a partial revolution, each unit having a
member adjusted to cause movement of the load
in a predetermined direction, the member of the
complete revolution unit being adjusted for a
number of unit distances equal to a predeter
revolution unit being adjusted to an extent de
pending upon a predetermined partial revolu
means responsive to a motor reversal to render 25 tion through which the load is to be additionally
moved, the said complete revolution unit being
said speed reducing means operative; a second
energized to move the load in the said predeter
control device for moving the load in any desired
mined direction with the said predetermined
position, said second control device having a neu
number of complete revolutions, and to energize
tral position and comprising a pair of relatively
movable members, one of the members being 30 the said partial revolution unit to continue load
movement in the said predetermined direction
selectively adjusted to control directional rota
for the said predetermined additional partial
tion of the said load motor to move the load to
revolution, each of said selectors being pre-set
desired positions; means for moving the other
for a predetermined position of the load; ?rst
member in a direction to restore the said second
control device to its neutral position to stop motor 35 switch means for selectively energizing one of
said selectors; a second control device for moving
rotation; and switch means selectively operated
for the said predetermined additional partial
revolutions; speed reducing means for the motor;
the load in any desired position, said second
control device having a neutral position and
to place the load motor under the control of the
?rst control device or under the control of the
second control device.
8. In a system for positioning a load to a se
lected one of a plurality of predetermined posi
tions or to any desired position, in combination,
a reversible motor for moving the load, a control
device comprising a unit for causing the load to
be moved through one or more complete revolu
tions and a unit for causing the load to be moved
comprising a pair of relatively movable members,
40 one of the members being selectively adjusted to
control directional rotation of the said load motor
to move the load to desired positions; means for
moving the other member in a direction to restore
the said second control device to its neutral
position to stop motor rotation; second switch
means selectively operated to place the load
motor under the control of the ?rst control device
or under the control of the second control device;
means mechanically connecting the ?rst switch
50 means with the second switch means for placing
through a partial revolution, each unit having a
member adjusted to cause movement of the load
in a predetermined direction, the member of the
complete revolution unit being adjusted for a
number of unit distances equal to a predeter
mined number of revolutions through which the
load is to be moved, the member of the partial
revolution unit bein'l7 adjusted to an extent de
pending upon a predetermined partial revolution 56
through which the load is to be additionally
moved, the said complete revolution unit being
energized to move the load in the said predeter
mined direction with the said predetermined
number of complete revolutions, and to energize
the said partial revolution unit to continue load
movement in the said predetermined direction
for the said predetermined additional partial
revolution; speed reducing means for the motor;
means responsive to a motor reversal to render 65
said speed reducing means operative; a second
control device for moving the load in any desired
position, said second control device having a
neutral position and comprising a pair of rela
tively movable members, one of the members 70
being selectively adjusted to control directional
rotation of the said load motor to move the load
to desired positions; means for moving the other
member in a direction to restore the said second
control device to its neutral position to stop motor 75
the ?rst switch means in a position deenergizing
all the selectors, when the second switch means
are operated to place the load motor under the
control of the second control device.
MICHEL N. YARDENY.
REFERENCES CITED
The following references are of record in the
?le of this patent:
Number
UNITED STATES PATENTS
Name
Date
835,382
1,488,723
1,508,796
1,693,314
1,850,780
1,979,588
2,124,684
2,224,619
2,342,717
Number
186,420
Willard ___________ __ Nov. 6,
Welsh ____________ __ Apr. 1,
Kaminski _______ __ Sept. 16,
Murphy _________ -_ Nov. 27,
Sperry et al ______ __ Mar. 22,
Vreeland _________ __ Nov. 6,
1906
1924
1924
1928
1932
1934
Behr et al ________ __ July 26, 1938
Umansky ________ __ Dec. 10, 1940
Yardeny _________ __ Feb. 29, 1944
FOREIGN PATENTS
Country
Date
Great Britain _______ Feb. 27, 1922
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