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Патент USA US2108313

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Feb. 15, 1938.
B M, Hom-ER
»
2,108,313
MOTOR CONTROL SYSTEM
'
Filed March 25, 1935
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2,108,313
Patented Feb. i5, .193s
UNITED STATES PATENT OFFICE
2,108,313
MOTOR CONTROL SYSTEM
Bayard M. Harter, Whitefish Bay, Wis., assigner
to Cutler-Hammer, Inc., Milwaukee, Wis., a
corporation of Delaware
'
`
Application Maren 25, 1935, serial No. 12,789
(o1. 24a-55)
6 Claims.
modification without departing from the spiritv
lThis invention relates to motor controlsys
and scope of the appended claims.
tems, and more particularly' to systems for con
trolling >motor driven machines such as dye
iisgers.
5
,
»
.
Y
In the drawing, Figure 1 diagrammatically i1
lustrates a. control system embodying the inven-.
Machines known as dye jiggers are commonly
employed for passing cloth-or other material in
opposite directions through a bath, such machines
being usually provided with a pair of beam rolls
either of which is adapted to be driven to wind
10 material thereon as the same is paidkout from
the other beam roll. The patentto William J.
tion, and -
’
5
Fig. 2 is a schematic view illustrating an oper
ating mechanism for certain of the control
switches shown in Fig. 1.
Referring to the drawing, the same illustrates
.a pair of direct current dynamo electric ma- 10 '
chines M1 and M2 which are coupled respectively
to a pair of beam rolls I and 2 for passing mate
closes a dye jigger of the aforementioned type, . rial such as cloth through a bath contained in a
receptacle 3. The dynamo electric machines M1
and proposes use of a pair of shunt wound
and M2 are of similar size and construction, each 15
15 motors for driving‘the beam rolls and connec
having an armature A and a shunt field Winding
tions to effect an automatic speed balancing ac
tion between the motors to maintain the linear F to be supplied with current from a direct cur
speed of the material and also the tension thereon rent supply circuit indicated by lines L1-L2.
The field windings F1 and F2 of the dynamo
substantially uniform during transfer of the ma
terial from either beam roll to the other. 'I‘he electric machines are connected in parallel across
lines Ll--L2 and the armatures A1 and A2v of 20
O control system disclosed in said patent also pro
vides for automatic reversal of the motors upon said machines are connected in series and are
a. selected number of revolutions of one of the controlled by an electroresponsive main switch 4,
beam rolls and for plugging of the motors during a pair of electroresponsive reversing switches 5
and 6 and a voltage responsive switch l.
’
reversals.
Main switch 4 is provided with normally open
25
The system disclosed in the aforementioned
Norton, No. 1,887,462 of November 8, 1932, dis
patent for controlling the tension and speed of
the material undergoing treatment while having
some advantageous features has been found open
l Yto serious objections. In practice it has been
50 found necessary to provide modified connections
for the motors and it has been found that plug
` ging of the motors during reversals is likely to
subject the material undergoing treatment to
r excessive strains. Also it has been found that re
versal of the motors upofn a selected number of
revolutions of one of the beam rolls is undesir
able since the points at which reversals should
occur are likely to vary due to shrinkage or
stretching of the material during treatment
40
thereof.
_
The present invention has among its objects to
provide an improved dye jigger control system
which overcomes the above noted objections to
,_ the> system of the aforementioned patent.
Another object is to provide a dye jigger con
trol system having improved means associatedl
therewith for eiîecting automatic rocking of the
beam rolls.
Cài
'
of the equipment, and as hereinafter s‘et forth
normally open contacts 5b and 5c associated with
reversing switch 5 control connections which pro
vide for operation of machine M1 as a motor and
machine M2 as a generator for winding of the
material upon beam roll l while normally open
contacts 6b and 6° associated with reversing
switch 6 control connections which provide for 5'
operation of machine M2 as a motor and ma
chine M1 as a generator for winding of the mate
rial upon beam roll 2. Also as hereinafter set
forth, upon starting of the equipment in either
direction, normally open. contacts 'lb associated 40
with switch 'l render the machine which is con
nected to act as a generator ineffective until the
machine which acts as a motor is brought up to a '
substantially normal speed, and. upon stopping
of the equipment normally closed contacts 4C 45
associated with main switch 4 operate to esVA
tablish dynamic braking connections for the ma~
chine which is operating as a generator.
``
The speed atwhich the material is >transferred
Various other objects and advantages of the from either beam roll to the other and also the 50
tension thereon is controlledby resistances R1
invention will hereinafter appear.
The
accompanying
drawing
diagrammati--
cally illustrates an embodiment of the invention
which will now be described, it being understood
Oi fil
contacts 4b for effecting starting and stopping
that the embodiment illustrated is susceptible of
and R2 and an adjustable reheostat RH. For a
purpose hereinafter set forth rheostat RH is nor
mally shunted by normally closed contacts ‘lc
associated with thevvcltage responsive switch 'l 5`5
2
2,108,313
i
`
and resistance R1 is arranged to be included in
nected in circuit with the operating lwindings of
the dynamic 'braking connections established by
relay I2 by the manually controlled switches 21
and 28 to effect automatic reversal of the dye
jigger upon paying out of all of the material
contacts 4° of main switch 4.
'I’he energizing circuit for main switch 4 is
controlled by a pair of normally open start push
buttons 9 and I0 and a plurality of normally
closed stop push buttons I I. Also main switch 4
is provided with normally open auxiliary con
tacts 4d which act upon response of said switch
10 to establish a maintaining circuit therefor
through the medium of the stop push buttons I I.
The start push buttons 9 and I 0 also provide
for control of the reversing switches 5 and 6
through the medium of an electroresponsive relay
I2. Relay I2 is provided with a pivoted contact
element I3 which is movable in one direction
under the action of an operating winding I4 con
trolled by push button 9 to bridge a pair of sta
tionary contacts I5-I5 and in an opposite direc
20 tion under the action of an operating winding
I6 controlled by push button I 0 to bridge a pair
of stationary contacts I1-I1. Contacts i5-I5
of switch I2 control the energizing circuit of re
upon either of the beam rolls l or 2. Also as
hereinafter set forth the switches 24 and 25 are
adapted to be connected in circuit with the oper
ating windings of relay I2 by manually controlled
switches 29 and 30 to automatically rock the
beam rolls upon winding of all of the material 10
upon either of said beam rolls.
The function and operation of the aforede
scribed control system and also the circuit con
nections thereof will now be more fully described.
Depression of either of the start push buttons
.9 or I0 establishes an energizing circuit for main
switch 4 extending from line L1 through the stop
push buttons II through push button 9 or l0, as
the case may be, to conductor 32 and thence
through the operating winding 4a of said main 20
switch to line L2. In responding main switch 4
establishes a maintaining circuit for itself ex
tending from line L1 through stop push buttons
versing switch 5 while contacts I1-I1 thereof ~ II to conductor 33 and thence through the aux
25 control the energizing circuit of reversing switch
iliary contacts 4‘1 of said main switch and the 25
6. The energizing circuits of reversing switches
5 and 6 are also controlled by normally closed
auxiliary contacts 1d associated with the voltage
responsive switch 1 and each of said reversing
30 switches is provided with normally open auxil
operating winding 48L thereof to line L2.
Depression of start push button 9 connects the
operating winding I4 of relay I2 across lines
L1-L2 through the medium of the stop push
buttons II and said relay is then moved into 30
iary contacts d for establishing a maintaining
pOsition to establish an energizing circuit for re
circuit for itself, and normally closed auxiliary
versing switch 5 extending from line L1 through
contacts 1f1 of voltage responsive switch 1,
contacts e for controlling the energizing circuit
of the other reversing switch. Each of the re
versing switches 5 and 6 is also provided with
' normally open auxiliary contacts f for connect
ing the operating Winding of the voltage respon
' sive switch 1 in shunt >with the armatures A1
and A2 of the dynamoelectric machines through
40 the medium of a normally closed switch I9 which
is operable as- hereinafter set forth by the ad
justing arm of rheostat RH.
The reversing switches 5 and 6 are also adapted
to be automatically controlled by a pair of count
ing devices 2l and 22, the former device being
driven from beam roll I and the latter from beam
roll 2.
Said counting devices are of an indicating
type capable of being manually adjusted to pro
vide for zero setting thereof, and counting device
2l is provided with a pair of control switches 23
and 24 while counting device 22 is provided vwith
a pair of control switches 25 and 26. As shown in
Fig. 2, the dials of the counting devices each have
a notch a on one side thereof which is located
opposite the zero figure thereon and the unit dial
has a notch b on the opposite side thereof which
is shown-opposite the numeral 4. Each of the
switches 23 and 26 has arms c associated there
4with which are arranged to drop into the notches
60 a in the dials of its associated counter when such
dials are in zero indicating position and each of
the switches 24 and 25 is provided with an arm d
which is arranged to drop into the notch b in the
unit dial of its associated counter. The switches
23 and 26 are biased to move to closëd position,
and as is apparent, the arms c associated with
said switches prevent closure thereof except upon
,zero setting of their associated counters. The
switches 24 and 25 are also -biased to move to
70 closed position and the arm d associated with
each of said switches prevents closure thereof
except upon movement of the unit dial of its
associated counter into a, given indicating posi
tion, as for example _4. As hereinafter set forth,
75 the switches 23 and 26 are arranged to be con
m
through contacts 6e cf reversing switch 6 to and
through the operating winding 5a of reversing
switch 5 and through contacts I 5-I5 of relay
I2 to line L2. Reversing switch 5 then responds
and establishes a maintaining circuit for itself
extending from line L1 through its auxiliary con
tacts 5f1 and through its- operating winding to 40
line L2 as already traced. Upon response of main
switch 4 and reversing switch 5 the armature A1
of machine M1 is energized by a circuit extend
ing from line L1 through contacts 51l of reversing
switch 5, through said armature to conductor 34,
through resistances R1 and R2 and through con
tacts 1c of the voltage responsive switch 1 and
contacts 41J of main switch 4 to line L2. Machine
M1 then operates as a motor to effect paying out
of material from beam roll 2 and winding thereof
upon beam roll I.
Depression of start push button I 0 connects
the operating winding I6 of relay I2 across lines
L1-L1 through the medium of the stop push but
tons II and said relay is then moved into posi
tion to establish an energizing circuit for re
versing switch 6 extending from line L1, through
contacts 1‘1 of voltage responsive switch 1,
through contacts 5e of reversing switch 5, to and
through the operating winding 6a of reversing
switch 6 and through contacts I1-I1 of relay
I2 to line L1. Reversing switch 6 in responding
establishes a maintaining circuit for itself ex
tending from line L1 through its auxiliary con
tacts 6d and through its operating winding 6a
to line L2 as already traced. Upon response of
main switch 4 and reversing switch 6 the arma
ture A2 of machine M2 is energized by a circuit
extending from line L1, through contacts 6c of
reversing switch 6, through said armature to 70
conductor 34, through resistances R1, R2, and
through contacts 1c of the voltage responsive
switch 1 and contacts 4b of main switch 4 to line
L2. The dynamo electric machine M2 then
operates as a motor to effect paying out of ma
2,108,313
ation of the machine associated with the un
winding roll as a braking generator. Thus when
all of the material is wound upon either of the
beam rolls, switch I9 may be opened to render
the machine associated with said beam roll in
effective as a braking ‘generator during winding
_ terial from beam roll I and winding thereof upon
beam roll 2.
When either of the reversing switches 5 or 6
responds the contacts f thereof connect the oper
ating winding 1a of voltage responsive switch 1
in shunt with the armatures A1, A2 through the
medium of switch I9. Thus when either of the
of the material upon the other beam roll.
Depression of either of the stop push buttons I I
effects interruption of the aforedescribed main
taining circuit for the operating Winding of main
machines M1 or M2 is started as a motor the other
machine acts as a .generator to supply winding 1a
with current the voltage of which is a function
of the speed of the former machine. Upon re
sponse of reversing switch 5 machine M1 acts as
a motor, as hereinbefore set forth, and when
said machine is brought up to a predetermined
speed switch 1 responds and armature A2 is then
connected across resistances R1, R2 and rheostat
RH by contacts 1b of switch 1 and contacts ‘1ic
of reversing switch 5. Machine M2 then oper
ates as a braking generator and to effect tension
ing of the material during winding thereof upon
beam roll I. Upon response of reversing switch
6 machine'M2 acts as a motor as hereinbefore
set forth, andwhen said machine is brought up
. to a predetermined speed, switch 1 responds and
25 armature A1 is then connected across resistances
R1, R2 and rheostat RH by contacts 1b of. switch 'I
and contacts 6b of reversing switch 6. v Machine
M1 then operates'as a braking generator to effect
tensioning of the material during winding there
of upon beam roll 2.
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,
In practice it has been found that when either
of the machines M1 or M2 operates as a motor
and the other machine as a braking generator
an automatic speed balancing action between the
machines is obtained which provides for transfer
of the material at a substantially uniform speed
and a substantially constant tension.
,
3
switch 4. Main switch 4 then drops out to inter
rupt the energizing circuit for the machine which
is operating as a motor and the contacts 4°
thereof establish a dynamic braking circuit for
the machine which is operating as a braking 15
generator. Assuming that the equipment is
stopped with- a reversing switch 5 in closed posi
tion contacts 4c establish a dynamic braking cir
cuit for the machine M2 extending from the left
hand terminal of armature A2 through resistance 20
R1, through contacts 4c of `main switch 4 and
through contacts 5c of reversing switch 5 to the
right hand terminal of armature A2. On the
, other hand, assuming that the equipment is
stopped with reversing switch 6 in closed posi 25
ltion contacts 4c establish a dynamic braking cir
cuit for machine M1 extending from the right
hand terminal of the armature A1, through reL
sistance R1 through contacts 4° and through
contacts 61’ of reversing switch 6 to the left hand 30
terminal of armature A1. Thus provision is
made for effecting stoppingfof the equipment by
dynamic braking of the machine associated with
the unwinding beamv roll.
As hereinbefore stated., the counting devices 2I 35
and 22 provide for automatic reversal of the
-equipment upon‘paying out of all of the mate
In connection with the foregoing it should be
noted that when either of the machines is started
40 as a motor the rheostat RH is shunted by con
tacts 1c of the voltage responsive switch 1 to
>insure quick acceleration thereof. However, up
on response of switch 1 the contacts 1c open to
include rheostat> RH in the armature circuits of
both machines and said rheostat is then effective
to regulate the tension on the material under'
going treatment. As is apparent, movement of
the arm 35 of rheostat RH towards the right in
cludes resistance and thus decreases the braking
50 effect of the machine acting as a generator to
thereby decrease the tension on the material
undergoing treatment, while movement of said
arm towards the left has an opposite effect.
It should also be noted in connection with 'the
Ci QA foregoing that when relay I2 is operated to re
verse the direction of operation of the equipment
the reversing switch which is closed at the time
of reversal and also the voltage responsive relay 1
must drop out before ‘an energizing _circuit for
60 the other reversing switch can be established.
Thus during reversals, the machine associated
with the beam roll upon which the material is
to be wound is always brought up to a predeter
mined speed before the machine associated with
the other beam roll is brought .into action as a
braking generator.
As hereinbefore stated, the auxiliary contacts
f of reversing switches ’5 and G provide for ener«
gization of the voltage yresponsive switch 1
through the medium of a normally closed switch
I9 associated with the rheostat RH. Switch I9
is adapted to be opened by a cam associated with
the adjusting arm 35 of rheostat RH to prevent
response of switch 1 vihen said arm is adjusted
75 to include sufficient resistance to prevent oper»
rial on either of the beam rolls, and the func
tion and operation of @these devices will now be
40
more fully described.
Assuming that the material is to be transferred
to beam roll I from an untreated roll mounted
upon beam roll 2. Prior to winding of any of
the material upon beam roll I counter 2| is set
at zero and the equipment is then set in oper» 45
ation by push button 9 to effect. winding ofthe
material upon said beam roll. When all of the
material is paid out from beam roll 2 the equip
ment is stopped by depression '0f one of the
stop push buttons II. The operator then sets 50
counter 22 at zero, closes switches 21 and 28 and
starts the equipment in a direction to effect
winding of the material upon beam roll 2 by
depression of start push button Iii.
Upon paying out of all of the material upon 55
beam roll I counter 2i returns to zero and switch
23 closes to establish an energizing circuit for
winding I4 of relay I2 extending from line L1
through the stop push buttons Il by conductor
through contacts 4d of main switch 4, by com 60
ductor 32, through switch 21, and through switch
23 and the operating winding I4 of relay I2 to
line L2. Upon energization of winding I4 relay
I2 operates to eñect energization of reversing
switch 5 and the equipment is thus automatically
reversed to effect winding of the material upon
-beam roll I. Upon paying out of all of the
material upon beam roll 2 counter 22 returns to
zero and switch 2G closes to establish an ener
gizing circuit for winding I6 of relay I2 extend 70
ing from line L1 through the stop push buttons
II, by conductor 33, through contacts 4d of
main switch 4, by conductor 32 through switch
28 and through switch 28 and winding I6 to line
L2. Relay i2 then operates to effect energization 75
4
2,108,313
of reversing switch 6 and the equipment is thus
2. A control system comprising, in combination,
automatically reversed to effect winding of the , a pair of direct current dynamo electric machines
material upon beam roll 2. The counters 2| and
22 thus provide for automatic reversal of the
equipment each time all of the material upon
either of the beam rolls is paid out. It should
be noted that when the counters are set as here
inbefore described the same will always return
to zero upon paying out of all of the material
associated with their respective beam rolls, re
gardless of stretching or shrinkage of the mate
for transferring material from either of two rolls
to the other, each of said machines having a shunt
rial during treatment thereof.
preventing operation of either of said machines
as a braking generator upon inclusion of a given
amount of said regulating resistance.
.
y
It is necessary to provide for rocking of the
beam rolls when all of the material is wound
upon either of the same to prevent settling of
the dye or liquor on the underside of the roll,
and as will now be set forth the switches 29 and
30 control this operation. When all of the ma
terial on beam roll 2 is paid out and wound upon
beam roll i the switch 26 associated with counter
22 operates as hereinbefore set forth to reverse
the direction of operation of the equipment to
eñect rewinding of the material upon beam roll
2. With switch 29 in closed position, switch-25
acts upon a given angular movement of beam
roll 2, as for example four revolutions thereof,
to establish an energizing circuit for winding H
extending from line L1 through the stop push
buttons ii, by conductor 33, through contacts
¿d of main switch 4, by conductor 32, through
switches 21, 2€! and 25, and through the oper
ating winding i4 to line L2. Relay l2 then Oper
ates to energize reversing switch 5 for rewind
ing of the material upon beam roll l, and upon
four revolutions of beam roll 2 the switch 26
again closes to eíect reversal of the equipment.
When all of the material on beam roll i is paid
out and wound upon beam roll 2 the switch 23
operates as hereinbefore described to reverse the
40 direction of operation of the equipment to effect
rewinding of the material upon beam roll i.
With switch 30 in closed position, switch 24 acts
upon a given angular movement of beam roll I,
as for example four revolutions thereof, to estab
45 lish an energizing circuit for winding I6 extend
ing from line L1, through the stop push buttons
i l, by conductor 33, through contacts ld of main
switch 4, through switches 28, 30 and 2| to and
through the operating winding I6 to line L2.
Relay i2 then operates to energize reversing
switch B for rewinding of the material upon
beam roll 2 and upon four revolutions of beam
roll i the switch 2t again closes to eiTect reversal
of the equipment. Thus provision is made for
rocking either of the beam rolls upon winding of
all ci the material thereon, and as is apparent,
rocking operations can be discontinued at any
time by opening the switch 28 or 3U, as the case
may be.
60
What I claim as new and desireto secure by Let
ters Patent is:
'
l. A control system comprising, in combination,
a. pair of direct current dynamo electric machines
for transferring material from either of two rolls
65 to the other, each of said machines having a
shunt held winding, means for selectively estab
lishing power connections for the armatures of
said machines to eiîect starting of either of said
machines as a motor and to thereafter render the
70 other of said machines operable as a braking gen
erator, an armature regulating resistance com
mon to said machines and means associated with
said former means ior shunting said regulating
resistance during starting of either of said ma
75 chines es a motor.
field Winding, means for selectivelyestablishing
power connections for the armatures of said ma
chines to eiîect starting of either of said machines
as a motor and to thereafter render the other
of said machines operable as a braking generator,
a regulating resistance common to said machines 10
and means associated with said former means for
3. A control system comprising, in combina
tion, a pair of direct current dynamo electric ma
chines for transferring material from either of
two rolls to the other, each of said machines hav
ing a sbpnt ñeld winding, an armature resistance
common to said machines, means for selectively 20
establishing power connections for the armatures
of said machines including said resistance to ren
der either of said machines operable as a motor
and the other of said machines as a braking gen
erator, means associated with said former means 25
for preventing operation of either of said ma
chines as a braking generator until the same is
brought up to a_ predetermined speed and means
associated with said last mentioned means for ex
cluding a portion of said armature resistance dur 30
ing starting of either of said machines as a motor.
4. A control system comprising, in combination,
a pair of direct current dynamo electric machines
for transferring material from either of two rolls
to the other, each of said machines having a shunt
_field winding, common armature resistance for
said machines including a regulating rheostat,
means for selectively establishing power connec
tions for the armatures oi said machines includ
ing said resistance to render either oi’ said ma 40
chines operable as a motor and the other of said
machines as a braking generator, said means in
cluding an electromagnetic switch responsive to
complete the armature circuit for said last men
tioned machine upon a given speed thereof, and 45
means for interrupting the energizing circuit for
said switch upon given settings of said rheostat.
5. A control system comprising, in combination,
a pair of direct current dynamo electric machines
for transferring material from either of two rolls 50
to the other, each of said machines having a
shunt iield winding, common armature resistance
for said machines including a regulating rheostat,
means for selectively establishing power connec
tions for the armatures of said machines includ
ing said resistance to render either of said ma
chines operable as a motor and the other of said
machines as a braking generator, said means in
ciuding an electromagnetic switch responsive to
complete the armature circuit for said last men
tioned machine upon a given speed thereof, means
associated with said switch for normally shunting
said regulating rheostat and means for interrupt
ing the energizing circuit Yof said switch upon
given settings of said rheostat.
6. In a system for transferring material from
either of two beam rolls to the other, in combina
tion, a dynamo electric machine coupled to each
of said beam rolls, means for reversibly operating
said machines as a motor and as a generator, and 70
as a generator and a motor, respectively, a device
associated with each of said beam rollsfor count
ing the number of revolutions thereof, each of
said counting devices being manually adjustable
to provide for zero setting thereof upon paying 75
2,108,313
5
out; of al1 of the material from its associated
beam roll, means associated with said counting
devices and acting upon zero setting thereof to
contro1 said reversing means for operation of
counting devices and operable upon rewinding of
either of said machines as a motor upon paying
the other beam roll as a motor.
out of all of the material from its associated
beam roll and means also associated with said
a relatively small amount of material upon either
of said beam rolls to control said reversing means
to eiîect operation of the machine associated with
BAYARD M, HORTER.
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