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Патент USA US2114143

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>Aprilv 12,- 1938.
I
T. M. HUNTER
'
2,114,143
VOLTAGE REGULATOR
Original Filed Dec. 19', 1955
v5 Sheets-Sheet l
INVENTOR
?air/was” 1%,”: er
BY
'
ATTORNEY
_
» April 12,1938.
T, M, HUNTER
'
' 2,114,143
VOLTAGE REGULATOR
Original. Filed Dec. 19, 1935
5 Sheets-Sheet 2
INVENTOR
ATTORNEY
12, 1938.
v
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7
T. M. HUNTER v
2,114,143
VOLTAGE REGULATOR
Original Filed Dec. 19, 1935
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ATTORNEY
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April 12, 1938.
'
T. M. .KHUNTER
.
' 2,114,143.
VOLTAGE REGULATOR
Original Filed Dec. 19, 1935
I
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5 Sheets~$heet 4
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‘
April 12, 1938.
T_ M, HUNTER
2,114,143‘
VOLTAGE REGULATOR
Original Filed Dec. 19, 1935
5 sheds-shed 5
LOAD
55¢
TEST TRANS.
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208V T0 0
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BUCK‘BOOST
SECONDARY
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LINE 208V
INVENTOR.
77%07zza5'MH/zu?€%‘
BY
J
a 97%
ATTQRNEY
Patented Apr. 12, 1938 ,
_ 2,114,143 *
UNITED STATES
PATENT OFFICE
2,114.14:
VOLTAGE REGULATOR
Thomas M. Hunter. East Orange, N. J., assignor
to American Transformer Company, Newark,
N. .1.
Application December 19, 1935. ‘Serial No. 55,191
Renewed July 10, 1937
.
‘
19 Claim. (Cl. 171-119)
This invention :relates toa new form of voltage bearings in the bottom of the compartment 4
and extend upwardly within the compartment.
regulator, although retaining all the fundamen
tal principles and many of the parts shown and The shaft ll carries a switch arm l3, while the
‘described in my Patents 2,014,510, issued Sep
5 tgmber l7, 1935;-and 1,993,007, issued March 5,
1 35.
'
In the first-mentioned .patent, there are de
scribed different methods by which voltage regu
lation has been obtained in the past, so that these
10 need not be further described herein. In the
second-mentioned patent, certain details of con
shaft I2 carries a switch arm [4. The switch
arms l3 and i4 are adapted to make contact, al- 5
ternately, with contact studs 11. to p inclusive (see
- Figures 4 and 9), these contacts being carried by
studs l5 supported on a block ii of suitable in
sulating material.
The compartment 4 has a cover i1 fastened 10
thereto in any satisfactory manner as by lag
struction and circuit arrangements have been" screws l8; one of the frame Ibolts I9 is shown as
set forth.
also
-
The \obiect of my present invention is to pro
I 15 vide still further improvements in the mechanism
entering into the operation of a regulator‘ of the
type described in my prior patents, and at the
same time provide a new circuit arrangement for
20
carrying my invention into practice.
Other objects will appear from the description
which follows.
-
t In the drawings accompanying this specifica
ion,v
.
Figure 1 is an elevational view of my new type
25 of regulator, with the casing removed.
" Figure 2 is a view similar to Figure 1. but
looking from right to left.
'
‘Figure 3 is apart-sectional and part-eleva
tional view on the line H of Figure 1.
30 Figure 4 is a view taken on the plane 4-4 of.
Figure 3.
Figure 5 is a view on the line 5-5 of Figure 3.
Figure 6 is a view on the line l,-—0 of Figure 3,
with the mechanism in one position of operation.
' 35
Figure '7 is a view similar to Figure 6, but with
the parts in a different. position of operation.
Figure 8 is a view similar to Figures 6 and '7,
but with the parts in a still-different position in
the cycle'of operation.
40
Figure 9 is a simplified wiring diagram of the
regulator circuits, minus the automatic control
features.
,
_
,
In the various views, wherein like numbers re
V fer to corresponding parts, i represents,'broadly,
45 a framework for supporting all parts of the regu
lator, the outside casing not being shown in Fig
ures 1 and 2, but the upper portion of it, 2, be
ing shown in Figure 3. The casing 2 is provided
with a closure plate I carrying a downwardly ex
50 tending compartment 4, to the bottom wall of
which is fastened a stub shaft 5 carrying a disc
6 having a single tooth 1 (see Figure 5)‘ which is
adapted to engage notches I in a pair, of Geneva
gears 9 and "I. These Geneva gears are rotat
55 ably carried with shafts ii and II that have
passing through ‘this, auxiliary
cover.
Mounted on the cover I1, is a limit switch and
mechanical stop 20, a gear box 2|, a motor 22, 15'
a condenser 23 used in connection with the motor,
a worm drive gear reduction 24, bearings 25 and
26, and an'operatlng shaft 21 which is support
ed by the bearings 25 and 26. Mounted on the
shaft 21 is a sleeve carrying clutch 28 which may 20
- be operated by a member 29 to which is at
‘ tached a lever”. The shaft 21 carries a hand
wheel 3| whereby the shaft 21 and parts con
nected thereto may be operated by hand when
the clutch, through the control rod 30, is op- 25
erated to properly position the clutch for man
ual operation. It is to be understood that the
control rod 30 extends outwardly so as to be
readily operated, the same as the handwheel 3 l.
The gear box 2| contains a bevel gear 32, car- 30
ried onv the shaft 21, which is adapted to ‘mesh
with a cooperating gear 33 carried on a shaft 34
supported by bearings 35. On the end of the
shaft 34 is an internal gear 36 adapted to engage
a pinion 31 carried on a drive shaft 30 which ex- 35
tends downwardly through the compartment 4
and has a bearing in the bottom wall thereof.
Adjacent the outer surface of the
the compartment 4-, the shaft
pinion 39 which meshes with a
is also carried by the stub shaft
single-tooth gear 6.
bottom wall of
38 carries a
gear 40 which 40
5 adjacent the
r
The framework i supports a collector 4| of ,
the commutator type, the bars of which are en—
gaged by brushes 42 carried on a support stud 45 '
43 which in turn is carried by a disc-like mem
ber 44 preferably of strong insulating material. 1‘
While I have shown three brushes 42, it is to be I
understood that the number of brushes depends
on the amount of current to be carried and is 50
referred to broadly in the claims as ‘fa brus ".
A stud41, comprising part of the commutator
structure, has mounted thereon a track member 40
having an extended bearing sleeve 49' whereby the
member 49 may be rotated about the stud 41, being 55
2
2,114,143
held thereon by a washer and nut 50. The sleeve
marked, namely 208 volts, maybe applied. The
49’ supports an insulator 48' on which are mount
transformer 85 has a plurality of coarse tape a
to 11 inclusive connected alternately to the rotary
switches l3 and I4, as indicated and heretofore
ed a disc 44 and a disc 48, and a metallic member
45 fastened to the disc 44 in any satisfactory man
ner. Between the insulating discs 44 and 48, a
pigtail 5| is positioned, one end of it being con
nected to the metallic member 45, which in turn
is electrically connected to the stud 43 carrying
the brush 42, the other end of the pigtail or
?exible cable, 5| being connected to another cir
cuit element to be later referred to.
The member 49, which I refer to in the claims
?ne taps 89 are connected to the bars of the col
lector 4|, alternate taps passing through the re
10
actor 88 as described in my Patent 1,993,007,
as a “track member", more particularly shown in
heretofore referred to, for the purpose of eliminat
Figures 6, 7 and8, has an outer track portion 52
ing sparking at the brush 42 as the same moves
from one commutator bar to another.
15
The collector brush 42 is connected to one end
15 and an inner track portion 53 looped together at
adjacent points 54 and 55 to form an endless re
versing track. As shown in the ?gures, the track
is in the shape of a groove formed in the mem
bero49. Arcuately spaced within the con?nes of
the portions 52 and 53 of the track, are projections
58 which may be’ made integral with the member
49, or may bev separate pins ‘fastened thereto, but
, they are adapted to function like the teeth of a
"gear to mesh with teeth on a drive gear 51. The
25 gear 51 is carried on the end of a stub shaft
58 which in turn is supported at the free ends
of a pair of spaced bars 59 and 80'. The opposite
ends of the bars 59 and 80 are oscilla'tably sup
ported on the drive shaft 38.
30
Positioned between the bars 59 and 60, and fas
tened ‘to the drive shaft 38, is a gear in the'shape
of a sprocket wheel 8|, which is connected by a
chain 82 to a second sprocket wheel 83 fastened
to the stub shaft 58.‘ Extending beyond the face
of the gear 51, from the shaft 58, preferably in‘:
tegral therewith, is a projection or pin 84 which
is adapted to enter the track grooves 52 and 59,
so that as the stub shaft 58 is turned by the
sprocket wheel 5|, chain 82 and sprocket 83, the
40 drive gear 51 will engage the projections“ and
thereby turn the member 49 in the direction of the
' arrow shown in Figure 6“
It will be noted in
this ?gure that the drive gear 51 is operating on
the inner side of the projections 58. When the
45 last projection 56v is reached, as shown in Fig
ure 7, the pin‘ or projection 84, moving in the
track, will pass around the loop end 55 into the
position shown in Figure 8, or on the opposite
sides of the projections 58; Since the drive wheel
50 5‘! is turning in the same direction, it will be
obvious that the direction of rotation of the mem
ber 49 will be reversed, as the frame or bar mem
$35
referred to. The switch levers l3 and I4 serve to
interconnect the coarse taps with the collector
transformer 81 which has a plurality of fine taps
69; that is to say, at one or more turns, or every
turn, or, if desired, at a‘ fraction of a turn. These
of the primary winding P of the buck-and-boost
transformer 85, while the other end of the primary
is connected at the central point ‘10 of the trans
former 85. The secondary S of the transformer 20
88 has one end connected to the source of power,
the voltage of which is to'beiregulated, while the
other end is connected to the primary of a load
circuit illustrated in the form of a testing trans
former ‘II, the load being applied to the secondary 25
thereof.
_
From what has been said, it will be seen that
the operation of the regulator will be understood,
as it isv similar to that shown and described in
my second-mentioned patent referred to in the 30
early part of. the ‘specification, except for this
general difference: That when the switches l3
and I4 pass to one side of the central tap 10, the
action on the primary P of the transformer 85
is reversed from the action when the switches are 35
connected to taps on the opposite side of the
central tap 10. When the switches I3 and | 4 are
on the taps h and i, and the brush is at the center
of its travel around the commutator, zero voltage
is applied to the winding P of the transformer 88, 40
so that the range of regulation is from zero to
double the voltage of the source of power. In the
case illustrated, this regulation is from zero to
416 volts in very smooth, gradual steps.
As heretofore referred to, the regulator may be 45
operated manually by the handwheel 8|, or auto
matically by the motor 22. The automatic de
vices are generally referred to and claimed in my
Patent 1,993,007, so they are not shown in the
present diagrammatic arrangement, nor described 50
in detail herein.
What I claimis:
bers 59 and 80'will oscillate about the drive shaft
1. A voltage regulator including the following
38 to allow the drive gear 51 to take up this re
instrumentalities; at least a pair of separate
transformer windings, one having coarse taps 55
and the other ?ne taps, the coarse taps from
one winding being interconnected to the other
winding through a pair of independently oper
able direot-contact-making switches with means
for operating the switches alternately so the cir
cuit between the windings, including the load
versing position.
' ,
-
-
.
'
It is to be understood that the number of pro
jections 58 on the track member 49, and the teeth.
in the drive gear, and other associated sprockets
and gears, is such as to act in synchronism to move
60 the single-tooth vgear 8 and the Geneva gears 9
and I0 at certain de?nite intervals; that is to
say, when the commutator brush 42 has reached circuit, is never opened, a collector of the com
the limit of its movement in one direction ‘around mutator' type having bars connected to the ?ne
the collector 4|, the Geneva gears 9 and I0 are taps of said other winding, a brush adapted to
65 operated tc'move the switch levers, either l3 or be continuously‘ connected to a circuit whose 65
i4, alternately just before the drive gear 51 moves voltage is to be- regulated, said brush being
to its reversing position as described.
-mounted for clock and anti-clockwise rotation
‘The frame I carries a main transformer 85, a around said collector, and means for moving said
buck-and-boost transformer 88, a collector trans
brush at synchronous intervals between move
70 former 61, and a reactor 88, all of which are con
ments of said switches; further characterized in 70
nected as shown diagrammatically in Figure 9, that said motions of the brush around the col
, wherein it is seen that the transformer 85 has
primary, to which a source of power, having any
lector are controlled by a device including a
rotatable member connected to said brush '
mounting to rotate the same, said rotatable mem
suitable voltage, such, for example, as that
her having radially spaced arcuately formed 75
preferably the central portion,‘ designated as the
a
2,114,148
tracks meeting to form an ‘endless reverse loop,
with a plurality of gear-engageable parts arou
ately spaced between the parts of the track, a
gear-wheel adapted to have its teeth engage said
engageable parts to rotate said member, means
for rotating said gear wheel and means asso
ciated with said gear wheel cooperating with said
track to cause said gear wheel to move around
the last of said engageable parts at the reversible
10 part of the loop, thereby reversing the direction
of. rotation of said member.
»
2. A voltage regulator as set forth in claim
1, further characterized in that said track com-‘
prises a re-entrant groove in one ‘face of said
15 rotatable member, and said engageable parts are
in the form of projecting pin-like parts adapt
ed to mesh with the teeth on said gear, and said
associated means comprises a stud-like forma
20
3
the axial line of said collector and carrying
thereon a plurality of rotatable members, a
brush, adapted to be continuously connected to
a circuit, the voltage of which is to be regulated,
carried by one of said members in operative en
gagement with the collector bars, an endless
direction-reversing track carried by another of
said members, driving means on said track mem
ber arcuately spaced within the confines of, the
track, means including a drive gear coacting be 10
tween said drive shaft and the ‘driving means on
said track member for rotating the same, and
means associated with said drive gear. and shaft
for cooperating with the track for reversing the
direction of action of the drive gear on said
track member driving means, the various gears
and interconnected parts being constructed and
tion, extending beyond the. face of said gear into
arranged so the said brush is moved at synchro
nous intervals between alternate movements of
said groove.
said Geneva gears.
’
»
3. A voltage regulator as set forth in claim
1, further characterized in that the rotating
means for said gear wheel comprises a pair ‘of
interconnected chain sprocket wheels, one of
which is ?xed on a drive shaft, while the other is
7. A voltage regulator as set forth in claim
6, further characterized in that the closure plate
for the casing carries a compartment within
which said pair of switches are mounted.
8. A voltage regulator as set forth in claim
carried on a stub shaft supported between two
6, further characterized in that the closure plate
bars pivotally mounted on said drive shaft, said I for the casing carries a compartment within
stub ‘shaft also carrying said gear wheel and which said pair of switches are mounted, said
terminating in a formation for cooperation with compartment opening through the closure plate
30 said‘ track.
‘
,
and having a cover for said opening, while said 30
4. A‘ voltage regulator as set forth in claim regulator-operating means is mounted on said
1, further characterized in that said track com
cover with the said drive shaft extending through
prises a re-entrant groove in said rotatable mem
said switch compartment, and having a bearing
ber and said engageable parts are projecting in a wall thereof, while the pinion, driven gear
35 members adapted to mesh with said gear; further
and Geneva gears are also mounted for rotation
characterized in that the rotating means for said on a wall of the compartment.
gear wheelcomprises a pair of interconnected
9. A voltage regulator as set forth in claim 6,
operating members, one of which is fixed on a
drive shaft; while the other is carried on a stub
40 shaft supported between spaced bars pivotally
_mounted on said drive shaft, said stub shaft also
carrying said gear wheel, and means extending
beyond the face of said gear wheel into said
groove for the purpose described.
45
5. A voltage regulatoras set forth in claim
1, further characterized in that said brush
further characterized in that the closure plate
for the casing carries a compartment within
which said pair of switches are mounted, said 40
compartment ‘opening through the closure plate
and having a cover for said opening, while said
regulator-operating means is mounted on said
cover with the said drive shaft extending through
said switch compartment, and having a‘ bearing
in a wall thereof, while the pinion driven gear
mounting includes a pair of spaced discs prefer- ' and Geneva gears are also mounted for rotation
ably of strong insulating material, said discs be
on a wall of the compartment, and further char
ing arranged to rotate with said member carry
50 ing said track, a stud carried by said disc nearest
the collector, the brush being carried by said
stud, and a fiexiblercable carried between said
disc and having one end connected to said stud
to complete an electrical connection to said brush
55 as said discs and brush are rotated,
6. A voltage regulator including‘ a casing
carrying therewithin at least a pair of separate
transformer windings, one having coarse taps
and the other ?ne taps, a closure plate for the
60 casing, a pair of ‘ independently operable rotat
able switches carried on the closure plate with
in the casing and serving to connect said coarse
taps to the other winding, a collector of the com
mutator type mounted within the casing below
65 said switches andhaving the bars thereof con
acterized in that the operative ‘connection be
tween the said drive shaft and the track member ,-,
includes; a pair. of spaced bars- oscillatably
mounted on the inner end of said shaft adjacent
said pinion, a pair of sprocket wheels having in
terconnected operating means and positioned be
tween said bars, one wheel being fast, on said
drive shaft, while the other is fixedly carried on
a stub shaft rotatably supported at the free end
of said bars, said drive gear for operating said
track member being on the end of said stub'shaft.
10. A voltage regulator as set forth in claim 6,
further characterized ' in that the operating
means on the closure plate may be either manual
or automatic, with means for shifting from one
to the other.
,
Iii. A voltage regulator including the following
nected to the ?ne taps of said other ‘winding,
cooperating means for the regulator carried on
the exterior of the closure plate and including a
drive shaft extending from the plate toward the
instrumentalities; at least a pair of separate
transformer windings, one having coarse taps and
the other ?ne taps, the coarse taps from one
winding being interconnected to the other wind
collector, a pinion on said shaft, a gear rotatably
ing through a pair of independently operable di
mountedon a part of said plate and adapted to
be operated by said pinion, a single-tooth disc
rect~contact~making switches with means for
operating the switches alternately so the circuit
between the windings, including the load circuit,
operated by said gear and a pair of Geneva gears
mounted for rotation at opposite ends of a di
75 ameter'of said gear, a stub shaft positioned on
70
is never opened, a collector-of ‘the commutator
type having bars connected to the fine taps of 75
4
,9,114,143
said other winding, a brush adapted to be con
tinuously connected to a circuit whose voltage
is to be regulated, said brush being mounted for
,clock and anti-clockwise rotation around said
collector, and means for moving said brush at
synchronous intervals between movement of
said switches; further characterized in_ that spe
cial means‘ are provided for reversing the direc
tion of rotation of said brush about the collector
10 after it has reached its full travel in one direc
tion, said means including a member mounted for
simultaneous rotationwith the brush, said mem—,
her having arcuately arranged radially spaced
portions joined at spaced points into an endless
15
track, with arcuately spaced projecting parts
within the con?nes of the track, a driving gear
wheel adapted to engage said projecting parts to
turn said member, and means engaging said
track to cause said gear wheel to move from one
20 side of said projecting parts to the other side
for turning said gear wheel from said drive shaft,
and means cooperating between said track and
mounting to cause said gear wheel to move so as
to engage said spaced projections on opposite
sides thereof when the loop ends of the track are
reached by said means.
-
14. A brush-reversing mechanism for a voltage
regulator as set forth in claim 13, further char
acterized in that said gear wheel mounting com
prises, two spaced bars oscillatably supported on
the drive shaft, a pair of sprocket wheels with
a chain interconnecting them, one wheel being
fast on the shaft between said bars, the other
fast on a stub shaft carried at the free ends of
said bars, the gear wheel being mounted on the
15
end of the stub shaft which has a projection com
prising said cooperating means, while the said
track is in the form of a groove within which
said cooperating projection moves.
_
15. In a voltage regulator of the type herein 20
described wherein a collector of the commutator
thereof, thereby automaticallyreversing the di
rection of rotation of the track member when type has its bars connected to the ?ne taps of a
transformer winding and a pair of rotary switches
the brush has reached its full travel in one di
have their alternate contacts connected to coarse
' rection.
12. A voltageregulator including the following taps on another transformer winding, the ro 25
25
instrumentalities; at least a pair of separate tating arms of said switches being connected to
transformer windings, one having coarse taps and ' the ?rst-mentioned winding and the collector is
the other ?ne taps, the coarse taps from one provided with a brush mounted for rotation
winding being interconnected to the other wind- _ around the collector, said brush being connected »
continuously in a circuit whose voltage is to be 30
30 ing through a pair of independently operable di
rect-contact-making switches with means for op-. regulated; further characterized in'that said
erating the switches alternately so the circuit be
tween the windings, including the load circuit,
is never opened, a collector of the commutator
35 type having bars connected to the ?ne taps of
said other winding, a brush adapted to be con
tinuously connected to a circuit whose voltage is
switch arms and brush are‘ operated by devices
connected to a drive shaft which may be con
trolled manually and automatically, the brush
operating devices including a disc-like member -
having a reversing endless groove in one face
thereof with gear-engageable parts arcuately
spaced within the confines of the groove, and a
drive gear oscillatably mounted on and indirectly
clock and anti-clockwise rotation around said col
driven from said drive shaft, and means moving 40
40 lector, and means for moving said brush at syn
chronous intervals between movement of ‘said, in said groove for causing the drive gear to move
switches; further characterized in that special so as to engage said gear-engageabie parts on op
means are provided for reversing the direction of posite sides thereof, thereby reversing the direc
rotation of said brush’ about the collector after tion of rotation of said disc-likemember, the
reversal being synchronized with the movement 45
45 it has reached its full travel in one direction,
of said switch arms as and for the purpose de
said means including a member mounted'for si
multaneous rotation with the brush, said member scribed.
16. A voltage regulator including a transformer
having arcuately arranged radially spaced por
tions joined at spaced points into an endless having, in effect, a continuous winding. the cen
tral section of which comprises the primary and 50
50 track, with arcuately spaced projecting parts
within the con?nes of the track, a driving gear adapted to have a source of power connected
wheel adapted to engage said projecting parts to thereto, the winding having coarse taps there
turn said member, and means engaging said from, a second transformer having a winding
to be regulated, said brush being mounted for
track to cause said gear wheel to move from one
side of, said projecting parts to the other side
thereof, thereby automatically reversing the di~
rection of rotation of the track member when
the brush has reached its full travel in one direc
tion, and further characterized in that the track
60 is in the form of a groove within which said en
gaging means moves, said driving gear wheel be
ing mounted on a driving mechanism that can
oscillate about a driving center, whereby said
driving gear can follow the directions imposed by
65 the track.
13. A brush-reversing mechanism for'a voltage
‘ regulator of the kind herein described including,
' a drive shaft, 2. member for operating the brush,’
said member having arcuately arranged radially
70 spaced portions joined in series to form an end
less loop reversing track, arcuately spaced pro
jections within the con?nes of the track, a gear
wheel for engaging said projections, .said gear
wheel being carried on a mounting which is os
76 cillatably positioned on said drive shaft, means
with ?ne taps, a pair of independently operable
direct contact making‘switches serving to inter
connect the coarse taps to the second-mentioned
transformer winding, means for operating the
switches alternately so the circuit between said '
windings, including the load circuit, is never
opened, a collector of the commutator type hav
ing bars connected to said ?ne taps, a buck-and‘
boost transformer having win
thereon, the
end of one winding being connected to the center
of the winding on the ?rst-mentioned trans
former, a brush mounted to rotate around said 65
collector and adapted to be continuously con
nected to the other end‘of said winding on the
buck-and-boost transformer, another winiling of
which is connected to one side of an alternating
current source of‘ power, and to a load trans 70
former winding, the opposite terminal‘ of which
is connected to said alternating current source of
power.
V
,
,
,
17. A voltage regulatoras set forth-in claim 18,
further characterised in, that when‘ the said
2,114,14s
coarse tap switches move to opposite sides of said
central tap, the said huck-and-boost transformer
' will be caused to'huck or boost the voltage im
pressedonitsprimarybythesourceofpower.
.
5
jacent said central tap, and the brush is at the
center of its travel around the collector, the
voltage applied to the secondary of the buck-and
boost transformer is substantially zero.
'
19. A voltage regulator as set forth in claim
further characterlaed in that when the said-Y" 16, characterised in that the arrangement of said
coarse tap switches move to oppodte sides-of said transformer windings, including their taps, with
central tap, \the said b'uck-and-hoost transformer said switches and collector, is such that the volt
age applied to said huck-and-boost transformer
will becausedto buckvorboostthe voltage im
pressed on its primary by the source of power, has a range from zero to substantially twice the 10
18. A voltage regulator as set forth in claim 16,’
further characterized in that when the said
switches are connected-to taps immediately ad
primary voltage applied to said transformer.
~
THOMAS M. HUNTER.
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