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Патент USA US2403490

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July 9, 1946-
w. A. BLACK
REMOTE
CONTROL MECHANISM
Filed Feb. 25, 1941
2,403,490
'
'
3 Sheets-She'et 1
i.'\'\- 'ENTOR.
WILLIAM A. BLACK
BY M
A TTORNE Y5
July 9, 1946-
w. A. BLACK
2,403,490
REMOTE CONTROL MECHANDISM
Filed Feb. 25, 1941
3 Sheets-Sheet 3 '
FIG. 4'
INVENTOR‘
WILLIAM A. BLACK
Sée
-.
BYz¢¢744 MM
ATTORNEYS
2,403,490
Patented July 9, 1946
UNITED STATES PATENT
_
-
2,403,490
REMOTE CONTROL MECHANISM
William A. Black, Montclair, N. J., assignor, by '
mesne assignments, to The W. L...Maxson Cor
poration, New York, N. Y., a corporation of New
York
Application February 25, 1941, Serial No. 380,475
1
13 Claims.
This invention relates to means for remotely
controlling power mechanism; i. e., to means
capable of causing a controlled member, whose
(01. 74-388)
2
'
receiver is electrically controlled from the trans
mitter to cause the receiver rotor substantially
to duplicate every movement of the transmitter
rotor. If the transmitter rotor is operated at
operation may involve the application of a very
uniform or variable speed, the receiver rotor is‘
substantial torque, to conform'closely in its op
caused to conform closely in its operation to the
eration to the operation of a control member 10
speed, direction ,of rotation, and variations of
cated-at a distance. The invention. has utility
speed of the receiver rotor. If the autosyn op
in many ?elds, notably in the aiming of guns,
erating current is turned on with the transmit
and in the control of surface craft, aircraft and
projectiles from a remote point. For illustra 10 ter rotor and the receiver rotor out of phase, the
latter rotor will shifteither forward or back
tive purposes the invention is disclosed herein in
ward to a position of substantial coincidence with
connection with the aiming of a gun.
.
the transmitter rotor, taking the shortest avail
In the pending applications of William A. Black,
able path in doing so.
_
~
for Power ampli?ers, Serial No. 284,644, ?led
July 15, 1939, now Patent No. 2,248,942, and 15 The autosyn has this characteristic, however,
Serial No. 364,809, ?led November 8, 1940, now _ that if there is absolutely no lag of the receiver
rotor relative to the transmitter rotor, the re
ceiver rotor wil-lbe capable of delivering no torque.
It is necessary, therefore, that a lag be present
vention and each comprising a relatively high 20 in order that the receiver rotor may deliver a '_
small but adequate torque for operating the low power, rotary mechanism involving a high torque;
power contrormechanism of the power ampli
variably operated, low power, rotary mechanism,
?er.
'
capable of delivering only a relatively low torque,
. The lag which necessarily occurs, between the
and mechanical means for causing the high power
mechanism to respond in its operation substan 25- transmitter rotor and‘the receiver rotor is un
avoidably ‘present in some degree as an out-of
tially to the operation of the low power-mech
, phase condition between the primary control
anism. For the purpose of the present disclo
member at the control station and the gun or
sure, the illustrative mechanism may be regard
ed as embodying substantially the simplest of 30 other ultimately operated instrumentality at the
receiver station. Inthe case of a gun. the max
these power ampli?ers, to wit, that of Serial No.
imum range of operation is 360°, and the pur
284,644. The invention, however, is not con?ned
pose of the entire illustrative mechanism may be
in its broader aspects to any particular or spe
considered to be to cause the remotely controlled
ci?c form or type of power ampli?er.
gun always to point in substantially the same di
If a power ‘ampli?er of the knd referred to is‘ 35 rection
(in azimuth) as the primary control mem
to be controlled from'a remote point, it is nec
' ber at the control station whenever the remote
essary that motion of a member at the remote
control means is operative. In other words,
control station be caused in some Way to be rephase correspondence of the gun with a primary
produced or substantially reproduced by a mem
control member is the thing to be desired.
ber which is located at the power ampli?er and 40 If the-autosyn transmitter rotor were caused to
which forms a part of the low power mechanism
turn in unison with the primary. input member,
thereof.
‘
,
the autosyn receiver‘rotor would also be'caused
One of ‘the most practical and advantageous
to turn vin unison with the primary input mem
known forms of synchronizer for causing repro
her, subject to the unavoidable autosyn lag, and ,
duction or substantial reproduction of motion at 45 this turning would :be applied through the power
a distance is the self-synchronous motor. The . ampli?er to the gun, still subject to the autosyn
construction and operation of self-synchronous _
lag, and to a further lag introduced by the am
motors is well known and the motors, themselves,
pli?er. The gun would vbe out of phase with the
are commercially available, the Bendix motor be
primary’ input member‘ by an, amount equal to
ving known as the “Autosyn” and the General 50 the lag of the autosynreceiver rotor relative to
Electric motor as the “Selsyn.” For brevity and " the autosyn transmitter rotor, plus the lag of.
convenience, and for illustrative purposes, the
the ampli?er output shaft relative to the autosyh
name “Autosyn” will be used in this speci?cation.
receiver rotor.
'
,
The autosyn comprises a transmitter includ
By operating the autosyn transmitter rotor
Patent No. 2,331,761, disclosure is made of sev
eral forms of power ampli?ers, each suitable for
utilization in the practicing of the present in
ing a rotor, and a receiver including a rotor. The 56- from'the primary control member through mul
2,403,490
3
-tiplication gearing, and operating the gun from
the ampli?er output shaft through appropriate
reduction gearing, the out-'of-phase condition of
4
1
.
ditions, not exceeding 5° ‘of rotation of the gun
relative to the primary control member. This
locking together could occur with the primary
the gun with relation to the primary control
control member and the gun in phase with one
member can be reduced to a desired fraction of
another, or with them out of phase with one an
the total out-of-phase condition above referred
other by any multiple of 10°. A very important
object of the present invention is to completely
to, depending upon the step-up and step-down
ratio chosen. If, for example, the autosyn trans
mitter rotor is geared to be turned by the pri
mary control member in the ratio of 36 to 1, and
the gun is geared to be turned by the output shaft
ofv the power ampli?er at one thirty-sixth the
remove this possibility of defective operation.
To this end, in accordance with a practical and
advantageous embodiment of the invention, pro
vision is made of two autosyns which will be re
ferred to, respectively, as the coarse autosyn and
the ?ne autosyn. The primary control member
speed of the autosyn transmitter rotor, the out
is connected to drive the coarse autosyn trans.
of-phase condition of the gun with reference to
the primary control member will be just one 15 mitter rotor in unison with itself, and the ?ne
autosyn transmitter rotor (illustratively) at
thirty-sixth as great as it would be if no step-up
thirty-six times its own speed. It is the ?ne
and step-down ratios were ‘employed. This
autosyn receiver rotor that normally controls
means of minimizing error is desirably utilized
the power ampli?er, and through the power am
in the mechanism disclosed herein, the ratios just
referred to being arbitrarily chosen for illustra 20 pli?er produces the operation of the gun in unison
with the primary control member at the control
tive purposes.
station.
The multiplication and division of motion,
It is an important feature of the invention in
however, introduces a fresh di?iculty which it is
connection with the preliminary establishment
a salient object of the present invention to over
,come. When the autosyn mechanism is cut off 25 of in-phase conditions, that mechanism is'pro
vided, cooperative with and responsive to rotation
from the source of electrical power, the primary
of the coarse autosyn receiver rotor, for causing
control member may be turned freely without
the ?ne autosyn to be disabled as a means for
in?uencing the autosyn receiver and the power
controlling the power ampli?er when the gun and
ampli?er, and the gun may be locally operated
through the ampli?er but independently of the 30 the primary control member are out of phase by
an. amount corresponding to one-half turn or
remote control mechanism. Either operation af
more of the ?ne autosyn receiver rotor, to assume
fects the position of thegun relative to the pri~
dominant control of the power ampli?er until the
mary control member, and either operation may
gun and the primary control member are out of
be of unlimited extent. The departure from cor
respondence of the primary control member with 35 phase by an amount corresponding to less than
one-half turn of the ?ne autosyn receiver rotor,
the gun may be any amount up to a. full revolu
and for then causing the ?ne autosyn to be re
tion before substantial phase correspondence is
established in its capacity to assert ‘control over
reestablished.’ One such revolutionis equivalent
the power ampli?er. A description and explana
to, and is accompanied by, relative rotation of
the autosyn transmitter and receiver rotors 4.0 tion of the control system will be found immedi
amounting to thirty-six revolutions.
If the primary control member and the gun are
relatively turned through one or more complete
ately following the brief description of the draw
ings and in advance of a more detailed description
of the illustrative mechanism.
Other objects and advantages will hereinafter
revolutions while the autosyn power is Off and
the gun remains stationary, the whole number 45 appear.
In the drawings forming part of this speci?ca
of revolutions may be disregarded as harmless,
but any fraction of a revolution that the primary
tion:
control member and the gun are out of phase
Figure 1 is a fragmentary view in side elevation,
when the power is again turned on must be cor
partly broken away, of a. power ampli?er in asso
rected to Within a reasonable tolerance. This 50 ciation with autosyn controlling mechanism;
' meansthat the autosyn transmitter and receiver
Figure 2 is a transverse sectional viewin eleva
rotors may have to be relatively rotated through
tion of a portionof the mechanism illustrated in
any amount from a small acute angle up to a
Figure 1, the section being taken on the line 2--2
considerable number of full turns in order to
of Figure 1 looking in the direction of the arrows;
bring about phase correspondence of the gun 55
Figure 3 isa detail sectional view taken upon
with the primarycontrol member.
As already noted, it is characteristic of the
the line 3-3 of Figure 1, looking in the direction
I of the arrows, and
I
autosyn that whenvthe power is turned on the
Figure 4 is a diagrammatic view illustrating
receiver rotor will seek phase correspondence with
comprehensively the principle of the remote con
the transmitter rotor by turning through the 60 trol mechanism.
shortest available path. As soon as correspond
Before going fully into details of construction,
ence is substantially achieved the receiver will
it will be useful ?rst to describe and explain in
lock in with the transmitter and will thereafter
a relatively broad way the general arrangement
substantially maintain such phase correspond
and the principle of operation of the parts of the
65
ence. The receiver rotor cannot, of course, be
control system of the illustrative mechanism. In
more than 180° away in one direction or the other
this outline reference will be had principally to
from phase correspondence with the transmitter
rotor. This being the case, it is evident that
the diagrammatic showing of Figure 4.
A primary control member I at the control sta
tion is turned with the object in view of turning
unless some provision is made to the contrary,
the autosyn transmitter rotor and the autosyn 70 a distantly located mount 2 of a gun 3 about a
receiver rotor, upon restoration of autosyn power,
vertical axis substantially in unison with the turn
will become locked together in corresponding
phase for operation in unison when they have
turned relatively to one another by an amount
ing of the member I.
‘
The primary control member I is directly con
nected to the rotor shaft 4 of a coarse autosyn
not exceeding 180°, or, under the illustrative con 75 transmitter 5. The coarse autosyn transmitter is
2,463,490
5
connected through two rotor conductors I26 and
I21 and through three ?eld conductors repre
sented for simplicity by the single line I28, to a
coarse autosyn receiver 6, whose rotor shaft ‘I
has fast upon it a gear 3.
_
A gear 9 fast upon the coarse autosyn trans
to the pinion 33, and the lever 34 remains sta
tionary.
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_,
v
1
The lever 34 has a forked lower end which em~
braces a, pin 31 affixed -_to the tail of arocking
Cil valve 38. The valve 38 is affixed .to a shaft 39
which is mounted in- axial alignment with the ‘
mitter rotor 4 drives a pinion Illa which is
mounted upon a. shaft we. The pinion I (la drives
ampli?er-‘output shaft 36. The valve 38 inversely
through two rotor conductors l1 and l8v and
tion, and swinging of the valve 38 in acounter
clockwise ‘direction from’ the neutral position
\ controls outlets 40 and 4| of- hydraulic gear pumps
42 and 43, and thereby controls the ‘speed and
a pinion 80 which is mounted upon a shaft II.
The pinion ID has fast with it a gear 92 which 10 direction of rotation of shaft 36 in the manner
drives a pinion l3 fast upon a rotor sh'aft M
and for the purpose fully described and explained
of a ?ne autosyn transmitter l5. ,The gear ratios
in. Serial No. ‘284,644. ',A concise detailed descrip
from 9 through I3 are such that the rotation of
tion of the ampli?er structure will be included
the rotor shaft I 4 is in the opposite direction
hereinafter. For the present it is su?icient to
from that of the rotor shaft and is thirty-six 15 note that swinging .of the valve 38 in a clockwise
times as extensive as that of the rotor shaft 4.
direction from the neutral position produces rota
The ?ne autosyn transmitter is connected
tion ofthe shaft 36 in a counter-clockwise direc
through three ?eld conductors represented for
simplicity by the single line It, with a. ?ne autosyn
produces rotation of the shaft 36 in a clock
receiver l9. Arotor shaft 20 of the ?ne autosyn
receiver l9' has fast upon it a pinion 2! which
mechanism be viewed from the front as in Figure
wise direction.
This is true whether the
drives a gear 22 mounted on a shaft 23. The gear
3 or from the rear asin Figure 2.
'
22 has fast with‘ it a, pinion 24. A switch arm 25
The shaft 36 has fast upon it a gear 36a which
is pivotally mounted upon the shaft 23 and has 25 drives a gear ‘36b, fast on a shaft 360. A gear 360!
a?ixed to it a stub shaft 26 upon which a pinion
fast on the shaft 360 drives a gear 36e, the latter
21 is rotatably mounted. The pinion 21 is in
gear being connected to turn the gun mount 2 in
terposed between the pinion 24 driven by the‘ ?ne
unison with itself. The described train normally
autosyn receiver and the gear 8 driven by the
drives the gun mount 2 in the same direction and
coarse autosyn receiver and meshes with both of 30 at the same speed as the primary control mem
them, being free to ?oat about an axis coincident
ber I.
with the axis of the pinion 24 but not to leave
As has already been indicated in the introduc
engagement with the gear 8. The pinions 24 and
tory portion of this speci?cation, the purpose of
providing the coarse autosyn is to. enable in
21 and the gear 8, therefore, constitute a differ
ential gear of limited output, 24 and 8 being the
phase conditions to be automatically and depend
ably reestablished vbetween the primary input
input gears, and 21 being the output gear. The
member I and the gun mount 2 when an out-of
effective output consists in a rotation of the switch
phase condition has been set up with the autosyn
arm 25 in one direction or another about the axis
current cut off, which requires for its correction
thereof. The purpose of the differential gear and
of the switch arm 25 will be explained .a little 40 a relative rotation of the rotors of the fine auto
syn transmitter, and the ?ne autosyn receiver of
farther on.
‘ 180° or more.
The gearing between the coarse and fine au
Alternating line current is supplied to the auto
tosyn receiver shafts 1 and 2a is chosen to cor
respond with' the gearing between the coarse-and 45 syns through a pair of line conductors 44 and 45
(see Figure 4) . The conductor 44 is directly and
?ne autosyn transmitter shafts 4 and [4. When
constantly connected to conductor I21 of the
the rotor shaft 20 runs in the opposite direction
coarse autosyn through a conductor 46. The ‘con
from the shaft 1 and at thirty-six times the ro
> ductor 45 is directly and constantly connected to
tary speed of the latter shaft, no planetary mo
tion is imparted to the pinion 2i and no motion, 50 conductor I25 of the coarse autosyn through a
conductor .41. Whenever the line current is on, r
therefore, is imparted to the switch arm 25.
therefore, the operating circuit of the coarse
In normal operation the ?ne autosyn rotor
autosyn is complete and the coarse autosyn is
shaft 20 is the exclusive driver of the low power
energized
and fully. operative.
‘
control means of a power ampli?er 28. A'gear
The-conductor
46
is
also
extended
across
and
29 fast on the shaft 29 drives a gear 30 of the 55
permanently connected to the conductor it of
same size as itself, fast on the low- power control
shaft 3! of the ampli?er. The shaft 3! is driven
in the direction in which the primary input mem
the ?ne autosyn, thereby connecting the .con
ductor l8- with the conductor 44. The operative
ness of the'?ne autosyn is dependent upon the
The shaft 3| has fast upon it a gear 32 which 60 establishment of a connection between the con
ductor-l1 vof the ?ne autosyn and the line con
meshes with a ?oating pinion 33 (see particularly
ductor 45, and the establishment of such a con
Figures 1 and 2) carried by a lever 34. The lever,
ber l turns.
nection is, in turn, made dependent upon operat
34 is mounted for rocking movement about the
ing conditions of the mechanism.
axis of the shaft M. A gear 35 of the same size
A conductor 48 runs from conductor 45 to a
as the gear 32 is fast upon an output shaft 36 65 switch
contact 49. An electromagnet armature
of the power ampli?er 28. This gear is also in
50 carries a, contact 5| for cooperation with the
mesh with the pinion 33. The gears 32 and 35
contact 49, the contact 5| being connected
and the pinion 53 constitute a differential gear,
through a conductor 52 to the conductor ll of
the gears 32 and 35 being the input gears, and
the ?ne autosyn. The contacts 59 and 5| nor
the pinion 33 being the output gear. Output of 70 mally engage one another and cause the ?ne
the differential gear is represented by planetary
movement of the pinion 33, i. e., rocking‘ move
ment of the lever 35. When the gears 32 and 35
are running in the same direction and at equal
autosyn to be energized when the line current
is on. Such engagement is broken, however,
when the armature 59 is drawn downward. The
armature 50 is so mounted and arranged, that it
speeds, there is no planetary movement imparted 75 may be drawn downward to break the ?ne auto
7
anoaeao
syn circuit by the energization of either of two
eiectromagnets 53 and 54.
Energization of the electromagnets 53 and 54
is selectively controlled through the switch arm
8
.
transmitter, and the tendency of the coarse auto- _
syn receiver is to shift counter-clockwise toward
a position of phase correspondence with the
25. The conductor 44 is connected through a con
ductor 55 with a contact 56 carried by the switch
arm 25. The contact 56 normally stands in a
coarse autosyn transmitter. Under the illustra
tive conditions assumed the shaft 28 would be
turning the pinion 21 clockwise. At the same
time the shaft 1 would be turning the pinion 21
neutral position between the contacts 51 and 58,
clockwise.
-
In order for the Pinion 21 not to be moved
and neither of the electromagnets 53, 54 is ener
gized. When the contact 56 engages contact 51 10 downward, as viewed in Figure 3, it would be nec
essary for the shaft 28 to gain speed thirty-six
it becomes connected with the conductor 45
times as fast as the shaft 1. The autosyn receiv
through conductor 58, winding 80 of electromag
ers 6 and I! are capable of delivering substantial
_net 63, and conductors 6|, 62 and 48. When the
ly the same torque, however, and would not gain
contact 56 engages the contact 58, it becomes
connected with the conductor 45 through con 15 speed at widely different rates. The effect of the
rotation of shaft 28 at this time would be almost
ductor 63, winding 64 of electromagnet 54, and
conductors 65, B2 and 48.
'The valve 38 is made directly responsive to the
negligible, and the pinion 21 would be shifted
downward almost as fast as if the pinion 24 were
electromagnets- 53 and 54. The tail portion 55 of
standing still. The pinion 21, therefore, is car
lever 34 (see Figures 1, 2 and 4) constitutes an 20 ried downward quickly until the downward mo
tion is arrested by engagement of the contact 56
electromagnet armature which stands between
pole pieces 56 and 61 of the respective electro
with the contact 58. As soon as this engagement
is established the electromagnet 54 is energized,
magnets 53 and 54. As viewed in Figure 4, ener
gization of the electromagnet 53 causes the lever
and this breaks engagement between the contacts
34 to be swung in a clockwise direction, and this 25 49 and 5| and renders the ?ne autosyn transmit
ter |5 incapable of in?uencing the ?ne autosyn
causes the valve 38 to be swung in a counter
clockwise direction causing the output shaft 36 of
receiver i9.
the ampli?er to be driven in a clockwise direction.
At the ,same time the energization of the elec
When the electromagnet 54 is energized, the lever
tromagnet 54- immediately causes the lever 34 to
34 is swung in a counter-clockwise direction, and 30 swing‘ the valve 38 in a clockwise direction, and
this causes the valve 38 to be swung in a clock
this causes the output shaft 35 and the control
wise direction and the output shaft 36 of the am
shaft 3| of the ampli?er 28 to be driven by the
pli?er to be driven in a counter-clockwise direc
power operating means of the ampli?er in a
tion.
counter-clockwise direction. The ?ne autosyn is
The electromagnets 53 and 54 are never ener 35 held disabled until the shaft 1 is out of phase with
gized, of course, unless the pinion 21 is swungto
the shaft 4 by an amount less than 5°. .At a point
one side or the other of its neutral position far
within 5° of exact phase correspondence of the
enough to cause the contact 56 to engage the con
shafts 4 and ‘I, the torque output of the shaft ‘I
tact 51, or to cause the contact 56 to engage the
diminishes, the pinion 21 returns toward neutral
contact 58. If the parts were set with the pinion 40 position, the energizing circuit of electromagnet
21 in its intermediate or neutral position and the
54 is broken, and the energization of the ?ne auto
shaft 1 were held stationary, turning of the shaft
syn circuit is reestablished, so that the ?ne auto
20 would carry the contact 58 into engagement
syn is now able to take over control. The com
with the contact 5'|_or the contact 58, depending
plete operation of the parts will be more fully ex
upon the direction of rotation of the shaft 28 be 45 plained presently.
fore the shaft 20 had been turned through as
Had the out-of-phase condition of the gun
much as 180°. Such engagement would not be
mount 2 with relation to the ‘primary control
established, however, by any lack of synchronism
member I been such as to cause‘ the shaft ‘I, upon
which occurs between the shafts ‘I and 28 during
reestablishment of line power, to turn in a clock
normal operation, that is, during operation which 50 wise
direction, the pinion 21 would have been
is occasioned by the turning of the primary input
shifted
upward and the contact 55 would have
member '| with the various parts in their normal
been carried into engagement with the contact
or substantially iii-phase condition.
'
51, causing the electromagnet 53 to be energized.
It may be assumed initially that the line cur
rent has been cut 011 and that the gun mount 2 55 In this case also the energizing current for the
?ne autosyn would have been cut off, but contrary
is displaced in a clockwise direction relative to the
to the former case the lever 34 would have been
primary control member | by a considerable
caused to swing the valve 38 counter-clockwise
amount, say somewhere vbetween 30" and 35“.
and would have caused the output shaft 38 of the
This entails a clockwise displacement of the
coarse autosyn receiver rotor relative to the coarse 60 power ampli?er to be driven in a clockwise direc
tion by the high power input shaft 68 of the am
autosyn transmitter rotor of between 30° and 35°,
pli?er. Again the ?ne autosyn would be reestab
and a counter-clockwise displacement of the ?ne
lished as the control means for the power ampli
autosyn receiver rotor relative to the ?ne autosyn
?er at a point within 5° of exact phase corre
transmitter rotor of between three and three and
a half complete turns. It may be assumed also for‘ 65 spondence of the shafts 4 and 1.
The gearing between the shafts 1 and 28 con
simplifying the present explanation that the pri
stitutes both a switch operating differential and a
.~mary control member | is not being turned when
lost motion driving means. As soon as the'switch
the line current is restored, although this latter
arm 25 is arrested at one of its limits of motion '
condition is not a requisite of correct operation.
At the instant of restoration of the line current 70. upon the turning on of the line current, the outlet
for the autosyn di?erential is closed. The ?oat
the contacts 49 and 5| are engaged, and hence the
ing pinion 21, therefore, loses its character as a
?ne autosyn as well as the coarse autosyn be
comes energized. The tendency of the fine auto
syn receiver is to shift clockwise toward a position
differential gear outlet and seeks positively to
transmit motion of the coarse autosyn receiver
of phase correspondence with the fine autosyn
shaft 1 to the now electrically disabled autosyn
2,403,490
10
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receiver shaft 20 at thirty-six times the rotary
speed of the shaft 1 and in a directionopposite
to the rotation of the shaft 1. This is consistent
with the ?oating pinion 21 of the autosyn differ
now be turned to e?ect simultaneously a corre
sponding turning of the gun through the opera
tion of the ?ne autosyn and the power ampli?er _
ential gear maintaining the limit position to which
it has been moved.
The tendency of the coarse autosyn receiver
rotor (with no other load than the shaft ‘I and
normal control of the gun mount from the pri
mary control member. The coarse autosyn re
28. The coarse autosyn operates idly during such
ceiver rotor continues out of phase with the pri
mary control member I by an amount substan
the gear 8) is to turn at a speed more than one
tially thirty-six times as great as the difference
thirty-sixth of the maximum speed at which the 10 of phase'of the primary control member I and
power ampli?er can drive the power ampli?er
the gun mount 2, but never enough to cause the
output shaft 36 (such maximum speed being a
contact 56 to engage either the contact 51 or the
function of the constant speed of the high torque
contact 58.
.
'
input shaft 68 of the ampli?er and of the limit
In the illustrative mechanism certain gear
position of the lever 34) .
_
15 ratios and relative directions of rotation have
The ?oating pinion 33, carried by the valve
been chosen and referred to, to facilitate‘ the de
scription and to promote a ready understanding
operating lever 36, is at a limit of movement, and
has temporarily lost its character as a differ
of the principle of the invention. It will be evi
ential outlet and become a positive transmitter
dent,‘ of course, that the carrying out of theprin
of motion between the gears 35 and 32. The 20 ciple of the invention admits of almost limitless '
shaft 3| is, therefore, restrained from turning
variation of detail so long as all the parts are
harmoniously organized to achieve end results of
faster than v‘the shaft 36. The shaft 20 is corre
the kind described.
spondingly held down in its speed, and since the
arresting of pinion 21 in a limit position has,
The two-stage control principle, coarse and
established a positive gear train between ‘i and 25 ?ne, could be extended to a through stage con—
20, the speed of 1 is restrained from shaft 36 and
trol, coarse, intermediate, and ?ne, or even to
forced to be consistent with the speed of shaft 36.
four or more stages if required. For_ practical
purposes the two-stage control ~has been found
Rotation of the gun mount 2 is, therefore, con
adequate. A plural stage power ampli?er‘ may
sistent in direction and speed of rotation with the
direction and speed of rotation of shaft ‘I.
30 also be utilized to advantage. In such a case the
The fact that the electromagnets 53 and 54
remote control means would be connected and
act directly upon the valve operating lever '36 is'
coordinated with the ?rst ampli?er stage.
important from the standpoint of applying and
The power ampli?er 28 and the control means
maintaining an adequate operating force upon
therefor at the receiver station are all combined
the valve 33. The shaft 1 has no difficulty in
keeping up to one thirty-sixth of the maximum
speed of the shaft 36, but under the illustrative
conditions it delivers too little torque to the
shaft 3| to warrant direct use of the coarse auto
syn for operating the valve.
into a single compact unit.
'
The power ampli?er 28 is enclosed in a housing
‘H comprising a rear hollow shell 12 and a front
closure plate 13 secured thereto. The housing’
‘H is substantially ?lled with oil so that all of
' 40 the running parts disposed within the casing are
When the coarse autosyn receiver shaft 1 is
nearly in phase with the coarse autosyn trans
mitter shaft 3 (in no event more than 5° out of
phase) the coarse autosyn transmitter ceases to
apply a sufficient driving power to the coarse
autosyn receiver shaft 1 to maintain the condi
tions just described. Since the rotary motion of
the power ampli?er output shaft 36 and of the
constantly submerged. A block 14 having var
ious bores and cavitiessin it is attached to the
front cover plate and has affixed to its rear face _
a closure plate 15. The block 14 and the closure
plate 15 de?ne the chambers of gear pumps 42
and 43, the exit passages 40 and 4| from the
gear pump chambers, operating space for certain‘
of the gearing, and bearings for a number of
the shafts.
_
?ne autosyn receiver shaft 20 will be continued
unabated so long as the ?oating pinion 21 of the 50
A motor housing 16 is-a?ixed through a ?ange
autosyn differential maintains its extreme, switch
17 by means of screws 18 to .the rear face of the '
closing (?ne autosyn disabling) position, any
casing member 12. The motor housing is sealed
diminution of speed of the coarse autosyn re
against ingress of oil from the casing TI. The
ceiver shaft 1 will immediately cause the switch
forward end of the motor shaft (not shown)
controlled by the ?oating pinion 2‘! of the auto 55 has a?‘ixed to it a driving pinion 19 which drives
syn diiferential to be opened. This open-circuits
a gear 80 fast on the high torque input shaft
the previously energized electromagnet (53 or St)
68 of the ampli?er 28; The high torque input
simultaneously causing the ?ne autosyn to be
shaft 68 of the ampli?er 28 is rotated continu
energized, and the valve 38 to be released by the
ously and at constant speed, and is connected
electromagnet to the control of the ?ne autosyn. 60 through two opposed hydraulic slip drive trains
The ?ne autosyn now takes over control to
to the high torque output shaft 36 in such a
improve the phase correspondence of the gun
manner as to apply an extraneouslylimposed
mount 2 with theprimary control member I,
direction and speed of rotation to the high
while the coarse autosyn receiver rotor comes to
torque output shaft 38. The shaft 68 has fast
rest. When the ?ne autosyn receiver rotor has 65 upon it a pinion 8! which drives an input gear
82 of one of the opposed trains in one direction
attained substantial coincidence with the ?ne
autosyn transmitter rotor, the ?ne autosyn
and at a ?xed speed, and the gear 82 in turn
transmitter ceases to apply a driving torque to
drives a like input gear 33 of the other of the
opposed trains in the opposite direction and at
the ?ne autosyn receiver rotor and that rotor
comes to rest, with the consequence that the out 70 the same speed. The opposed trains are dupli
put shaft 38 of the ampli?er and the gun mount 2
cates of one another. A brief description of
also come to rest.
one of the trains will, therefore, su?ice for both.
The gun mount 2 has now been brought sub
- I The gear '82‘ is formed with internal as well‘
stantially into phase with the primary control
as external teeth, so that it may constitute ‘a
member I. The primary control member I may
ring gear element of ‘a di?erential gear. The
aeoasoo _
I it
,
E2
gear 82, which constitutes the input of the dif
v
reduced, threaded, rear end portion of the shaft.
ferential gear, meshes with planet gears 85 car
rled by an output gear 85. The planet gears“
86 also mesh with a sun gear 85 which is the
The gear‘ 22 and the pinion 24 are fast with one
another, the gear 22 being formed with a boss or
The output gears 85 of the two trains are both
hub portion 93 which bears against the ‘inner
face of the casing member 9i. A spacing collar
95, integral with the shaft 23, is interposed be
in mesh with a gear 87! fast upon the high
tween the forward side of the pinion 2t and a
_ driver for the gear pump 182.
torque output shaft 35. The high torque input
disc 95, the disc being rotatably mounted on‘ the
shaft 68 serves to drive the input gears 82 and
forward end of the shaft 23. A snap ring retainer
633 at equal speeds but in opposite directions, but 16 91 is amxed to the forward extremity of the shaft
the output gears 85 01‘ the two trains are always
23 for holding the disc 96 on the shaft.
constrained when not at rest to rotate at equal
The disc 96 is formed with a rearwardly ex~
speeds and in the same direction with one an
tending cylindrical boss 98, and the switch arm
other because of their common engagement with
25 is impaled upon the boss. being formed to ?t
the gear 8'5. Because of this opposed relation of 115 the boss. The switch arm 25 is a?fixed to mar
the two trains, no motion is imparted to the out
ginal portions of the disc 96 by means of rivets Q9.
put shaft 38 so long as the resistances to oper
The switch arm 25 is made of insulating material,
ation of the sun gear outputs of the two trains
and has the contact member 56 aihxed to its
are equal. Unbalancing of these resistances,
upper
is connected
end. As
to already
the contact
noted,
member
the conductor
56.
however, causes motion to be transmitted to the
high torque output shaft 36 in one direction
The casing member 9% has an insulating block
or the other according to the direction of un
Hid secured to lie against the under face of its
balance.
top wall by means of screws ml passed through
The gear pump outlet passages 6d and iii ter
the insulating block and threaded into the top
minate, respectively, in outlet ports
and cs, as 25 wall. The block IE0 is desirably of laminated
seen in Figure 2. The valve 38, which is a see
construction. Metallic brackets M2 and Hill.
mental valve, af?xed to the shaft 3-9, is adapted
which are L-shaped, have horizontal arms which
to be shifted in one direction or another from.
are attached to the block I00 and vertical arms
a neutral position for controlling the pump out
which extend downward from the bloclc will in
let ports 88 and as inversely. The pump ob
confronting relation to one another.
structing valve 33, when in a neutral or central
The contacts 57 and 58 take the form of headed
position, partially obstructs each of the outlet
screws which are threaded through the verticaliy
ports 38 and 89, the degrees Of obstruction being
extending arms of the brackets W2 and “13, r- equal. Thavalve 3% may, however, be moved
spectively. A terminal ring HM of the conductor
clockwise (as viewed in Figure 2) to increase the 35 59 is clamped against the head of the.screw 5'5
, obstruction of the outlet port 88 while diminish
by means of a nut E05 threaded on the screw.
ing the obstruction of the outlet port at“, or it may Similarly, a terminal ring “16 of the conductor
be moved in the opposite direction to increase the
53 is clamped against the head of the screw E58
obstruction of the outlet port 89, while diminish
by means of a nut Illl threaded on the screw.
ing the obstruction of the outlet port 39. It is
The screws are adjusted relative to one another
evident, of course, that the power required for
and to the neutral position of the contact 56 to
thus operating the valve is but a small fraction
afford to the contact 56 and the switch arm ‘252'
of the power which the shaft 68 can be caused
the range of movement desired for causing the
to deliver to shaft 36 as a result of such valve
operation. As already explained, the valve 38 is 45 switch arm and the autosyn differential to oper
ate in the manner heretofore described and in
normally under the joint control of gears 32 and
accordance with the principle heretofore ex
35 a?xed, respectively, to the low power control
plained.
shaft 39 and to the high torque output shaft 36.
A plate “it of non-magnetic and non-conduc
The valve 38 is also subject to electromagnetic
tive material is secured to the top‘of the casing
control through ‘the armature lever Ed. The
member 72 and covers an opening its formed
electromagnets and associated conductors and
in the top of the casing member. The electro
switches are desirably protected against ex
magnet pole pieces [it and Eli extend down
posure to the oil in the housing ‘i 8. These parts,
through the plate I08, ?t the plate snugly, and .
together with the autosyn differential gears are
housed in auxiliary casing members 96 and ti (55 are sealed to preclude the splashing or seepage
of oil upward into the chamber in which the
which are affixed to the housing ‘H externally
electromagnets 53 and Eli are housed. The wind
thereof.
lugs 66 and M of the electromagnets t3 and 56
The autosyn receivers are individually mounted
are mounted upon the plate W8. A C-ehaped
in their own casings, the casing Q2 of the autosyn
bracket H0 a?xed to the plate M8 by rivets» l M
6 being fragmentarily illustrated in Figure 1.
extends upward between the electromagnets and
These autosyn casings are affixed to the rear face
to the rear thereof, and has its upper end portion
of the casing member 96. The rotor shaft ll of
extended forward to support the contact (119. As
the autosyn (‘3 extends forward into the casing
member 9i and has the gear E5 affixed to its for
previously-noted, the conductor tit is affixed to
ward end and disposed within the casing member '
the contact I59.
A bracket HE is ai?xed to the plate Edd between
the electromagnets and in front of .them by rivets
H3. The bracket H2 is formed at the upper end
thereof with a rectangular recess lit through
95. Similarly, the rotor shaft 29 of the autosyn
it extends forward into the casing member 96,
and the pinion 2i and the gear 29 which are
ai?xed to this shaft are disposed within the cas
ing member at.
‘
The shaft 2% upon which the gear 22, the pinion
2d and the switch arm 25 are rotatably- mounted,
70 which the forward end portion of a ball or rock
ing lever H5 extends with capacity to rock upon
is a shoulder stud, and is supported from the rear
wall of the casing member sl, being clamped to
the wall by a nut at which is screwed onto a
e
that portion of the bracket which forms the base
of the slot. The bail is formed .with notches
which loosely embrace the bracket lit at oppo
site ends of the recess l it. The lever H5 extends ‘
acoaceo ‘
14
13
the armature member 50 which is adapted to be
drawn downward by energization of either the
relative to the primary control" member within a
limit corresponding to less than a half turn of the
?ne synchronizer rotors relative to one another.
magnet 53 or the magnet 54. The lever H5 has
a?lxed to the rear end portion thereof the contact
5! which is adapted to engage the contact 49 in
the raised position of the lever as illustrated in
cludes a primary control member at a transmit
ting or control station and a controlled member
at a receiving station which is required, when
rearward from the bracket and has amxed to it‘
Figure l and to disengage the contact 49 when '
2. In a remote control mechanism which in- '
. under the in?uence of the remote control mecha
nism, to be maintained in phase with the primary
control member subject to ?ne tolerances of error,
in combination, a coarse synchronizer comprising
the lever is drawn downward through the ener
gization of either one of the electromagnetsa As
already noted, the conductor 52 is connected to
the contact 5|.
The lever H5 has a tail portion at its forward
end which extends forward from the bracket‘ I II.
A coil spring H6 is connected to this portion of 15
a transmitter rotor at the control station, a re
ceiver rotor at the receiving station, and means
for causing the receiver rotor to correspond in
phase with the transmitter rotor subject to a lag _ ‘
of limited extent. a ?ne synchronizer comprising
a transmitter rotor at the control station, a re
ceiver rotor at the receiving station, and means
the lever and to an arm Ill of the bracket H2.
The spring H6 tends constantly to draw the for
ward end of the lever downward and hence to
for causing the receiver rotor to correspond in '
hold the contact 50 upward and in engagement
phase with the transmitter rotor subject to a lag
with the contact 5%. Unless one or the other of 20 of limited extent, means for controlling the coarse
the electromagnets 53 and 54 is energized. there
and ?ne transmitter rotors from the primary
fore, the contact bi will always be in ‘engagement
control member, the former at the speed of the
- ,
primary control member and the latter at a ?xed
While the pole pieces 66 and 6? of vthe electro
multiple of that speed, means driven by the re
magnets for acting upon the armature member 25 ceiver rotor of the fine synchronizer for control
65 extend down into the oil ?lled housing ‘H, it
ling operation of the controlled member, di?'er
is to be noted that these members are designed
ential means driven jointly by the two receiver
to exert exclusively an electromagnetic action,
rotors, and means responsive to said differential
and that they do not constitute electrical contact
means for temporarily rendering the ?ne receiver
members for the conducting of electrical cur
rotor non-responsive‘ to the ?ne transmitter rotor
rents. They are not themselves submerged in
whenever the remotev control mechanism is set
oil, ‘but stand above the level of the oil in the
into operation with said rotors out of phase'by
with the contact db.
housing ‘I I. There is no serious objection to their
more than a predetermined amount.‘
surfaces becoming oil coated, since the oil does
3. In a remote control mechanism which in
not detrimentally affect the magnetic properties 35 cludes a primary control member at a transmit
of the members nor interfere with their intended
ting or control station and a controlled member
at a receiving station which is required, when
magnetic action.
I have described what I believe to be the best
embodiments of my invention. I do not. wish,‘
however, to be con?ned to the embodiments
under the in?uence of the remote control mech
anism, to’ be maintained in phase with the pri
marycontrol member subject'to ?ne tolerances
of~error, in combination, a coarse synchronizer
comprising a transmitter rotor at the control sta
tion, a receiver rotor at the receiving station, and
shown, but what I desire to cover by Letters
Patent is set forth in the appended claims,
I claim:
i
1. In a remote control mechanism which in 45
cludes a primary control member at a transmit
ting or control station and a controlled member
at a receiving station which is required, when
under the in?uence of the remote control mecha
nism, to be maintained in phase with the primary 60
control member subject to ?ne tolerances of error,
in combination, a pair of synchronizers each com
prising rotors at the transmitting and receiving
stations, respectively. and means for causing the
receiving‘rotor of each synchronizer to seek and
maintain phase correspondence with the trans
mitting rotor of the same synchronizer, subject
means for causing the receiver rotor to corre- '
spond in phase with the transmitter rotor sub
ject to a lag of limited extent, a ?ne synchronizer
comprising a transmitter rotor at the control sta
tion, a receiver rotor at the receiving station‘, and
means for causing the receiver rotor to corre
spond in phase with the transmitter rotor sub
ject to a lag of limited'extent. means for driving
the coarse and fine transmitter rotors from the
primary control member ‘at speeds which bear a
?xed relationship to one another, the latter at
a speed substantially in excess of the former,
means driven by the receiver rotor of the ?ne
to a lagof limited extent, means for driving the
svnchronizer for controlling the operation of the
controlled member, differential means driven
member at speeds bearing a ?xed relation to one
jointly by the two receiver rotors, means respon
60
another, the rotor of the fine synchronizer'at a
sive to said differential means for'temporarily
speed considerably in excess of the speed of the
rendering the ?ne receiver rotor non-responsive
transmitting rotors from the primary control
rotor of the coarse synchronizer, means for nor
to the ?ne transmitter rotor whenever the con
mally operating the controlled member at the
trol mechanism is set into operation with said
receiving station under the control of the ?ne
rotors out of phase with one another by more
synchronizer, and means responsive to an out of 65 than a predetermined amount, and means re
phase condition of the controlled member and
sponsive to said di?erential means for causing
the primary control member corresponding to.
more than one-half turn of the transmitting and
receiving rotors of the ?ne synchronizer relative
I
to one another, to cause the fine s‘ynchronizer to
be temporarily disabled and superseded in its
controlling function by the coarse synchronizer
and then to be reestablished in its controlling
function when the coarse synchronizer has re
established synchronism of the controlled member 75
the coarse synchronizer to assert a superseding
control over the operation of the controlled mem
ber and of the ?ne receiver rotor until the con
trolled member is out of phase with the primary
control member by an amount corresponding to
less than a half turn of the ?ne receiver rotor
relative to the ?ne transmitter rotor.
_
4. In a remote control mechanism which in
is
BAOSAGQ
cludes a primary control member at a transmit»
ting or control station and a controlled member
at a receiving station which is required, when
under the influence of the remote control mech
anism, to be maintained in phase with the pri
mary control member, subject to ?ne tolerances
of error, in combination, a coarse synchronizer
comprising a transmitter rotor at the control sta~
to
the transmitting rotors oi the synchronizers,
means responsive to said lost motion means when
the lost motion has been exhausted in either
direction for rendering the ?ne synchronizer re
ceiver rotor non-responsive to the ?ne synchro
nizer transmitterrotor, ‘and means also directly
responsive to said lost motion means for causing
the controlled member to be turned until it is
tion, a receiver rotor at the receiving station, and
out of phase with the primary control member
means for causing the receiver rotor to corre 10 by an amount corresponding to less than a half
spond in phase with the transmitter rotor sub
turn of the ?ne receiver rotor relative to the ?ne
ject to a lag of limited extent, a ?ne synchronizer
transmitter rotor.
comprising a transmitter rotor at the control
6. In a remote control mechanism which in
station, a receiver rotor at the receiving station,
cludes a primary control member at a transmit
and means for causing the receiver rotor to cor 15 tins or control station and a controlled member
respond in phase with the transmitter rotor sub
at a receiving station which is required, when
ject to a lag of limited extent, means for driving
under the in?uence of the remote control mech
the coarse and ?ne transmitter rotors from the
anism, to be maintained in phase with the pri
primary control member at speeds which bear a
mary control member, subject to ?ne tolerances
?xed relationship, the latter at a speed consider
of error, in combination, a coarse synchronizer
ably in excess of the former, means driven by
comprising a transmitter rotor at the control
the receiver rotor of the fine synchronizer for
station, a receiver rotor at the receiving station,
controlling the operation of the controlled mem
and electrical means for causing the receiver
ber, a lost motion connecting‘ means between the
rotor to correspond in‘ phase with the transmitter
?ne and coarse receiving rotors permitting rela
rotor subject to a lag of limited extent, a ?ne
tive rotation of the fine synchronizer receiver
synchronizer comprising a transmitter rotor at
rotor and the coarse synchronizer receiver rotor
the control station, a receiver rotor at the re
in either direction from a neutral or midway
ceiving station, and electrical means for causing
condition of said lost motion means limited in
the receiver rotor to correspond in phase with
extent to an amount corresponding to less than
the transmitter rotor subject to a lag of limited
a half turn of the ?ne receiver rotor, said lost
extent, means for driving the coarse and ?ne
motion means at either limit establishing a drive
transmitter rotors from the primary control
from the coarse receiver rotor to the ?ne receiver
member at speeds which bear a ?xed relationship
rotor of the same ratio as that which is main
to one another, the latter at a speed substantially
tained between the transmitting rotors of the 35 in excess of the former, means driven by the re
synchronizers, and means responsive to said 10st
ceiver rotor of the ?ne synchronizer for control
motion means when the lost motion has been ex
ling the operation of the controlled member,
hausted in either direction for rendering the ?ne
means for connecting the synchronizers to a
synchronizer receiver rotor non-responsive to the
?ne synchronizer transmitter rotor.
5. In a remote control mechanism which in
cludes a primary control member at a transmit
ting or control station and a controlled member
source of electrical energy, lost motion ‘connect
40 ing means between the ?ne and coarse receiver
rotors permitting relative rotation of the ?ne
synchronizer receiver rotor and the coarse syn
chronizer receiver rotor in either direction from
at a receiving station which is required, when
a neutral or midway condition of the lost motion
under the in?uence of the remote control mech 45 means limited in extent to an amount corre
anism, to be maintained in phase with the pri
sponding to less than a half turn of the ?ne re
mary control member, subject to ?ne tolerances
ceiver rotor, said lost motion means at either
of error, in combination, a coarse synchronizer
limit establishing a positive drive in one direc
comprising a transmitter rotor at the control sta
tion of rotation between the coarse and ?ne re
tion,'a receiver rotor at the receiving station, and 50' ceiver rotors of the same ratio as that which is
means for causing the receiver rotor to corre
maintained between the transmitting rotors of
spond in phase with ‘the transmitter rotor sub
the synchronizers, and switch means responsive
ject to a lag of limited extent, a ?ne synchronizer
to said lost motion means when the lost motion
comprising a transmitter rotor at the control sta
has been exhausted in either direction for ren
tion, a receiver rotor at the receiving station, and
dering the ?ne receiver rotor non-responsive to
means for causing the receiver rotor to correspond
the ?ne transmitter rotor until the controlled
in phase with the transmitter rotor subject to a
member is out of phase with the primary control
lag of limited extent, means for driving the coarse
member by an amount corresponding to less than
and ?ne transmitter rotors from the primary con
a half turn of the ?ne receiver rotor relative to trol member at speeds which bear a ?xed rela 60 the ?ne transmitter rotor.
tionship, the latter at a speed considerably in
7. In a remote control mechanism which in
excess of the former, means driven by the receiver
cludes a primary control member at a transmit
rotor of the ?ne synchronizer for controlling the
ting or control station and a controlled member
operation of the controlled member, a lost mo
at a receiving station which is required, when
tion connecting means between the ?ne and 65 under the, in?uence of the remote control mech
coarse receiving rotors permitting relative rota
anism, to be maintained in phase with the pri
tion of the ?ne synchronizer receiver rotor and
mary control mpmber, subject to ?ne tolerances
the coarse synchronizer receiver rotor in either
of error, in combination, a coarse synchronizer
direction from a neutral or midway condition of
comprising a transmitter rotor at the control sta
said lost motion means limited in extent to an 70 tion, a receiver rotor at the receiving station, and
amount corresponding to less than a half turn
electrical means for causing the receiver rotor to
of the ?ne receiver rotor, said lost motion means
correspond in phase with the transmitter rotor
at either limit establishing a drive from the coarse
subject to a lag of limited extent, a ?ne synchro
receiver rotor to the ?ne receiver rotor of the
nizer comprising a transmitter rotor at the con
same ratio as that which is maintained between 75 trol station, a receiver rotor at the receiving sta
1
2,403,490
17
tion, and electrical means for causing. the receiver
rotor to correspond in phase with the trans
mitter rotor subject to a lag of limited extent,
means for driving the coarse and ?ne transmitter
rotors from the primarycontrol member at speeds
which bear a ?xed relationship to one another,
the latter at a speed substantially in excess of the
former, means driven by the receiver rotor of the
?ne synchronizer for controlling the operation
~
-
is
-
a pair of ‘circuits including the respective‘ elec
tromagnets and adapted to be‘ selectively closed
by the switch means in'accordance witlrthe di-v
, rection in which the switch means is moved by
the lost motion means, means responsive to en
ergization of either- of the electromagnet's for
rendering the ?ne receiver rotor non-responsive
to the ?ne transmitter rotor, and means selec
tively responsive to the'electromagnets ior estab
of the controlled member, means for connecting 10 lishing and maintaining rotation of the controlled
member in ,one‘ direction or the other according
~ the synchronizers to a source or electrical energy,
to the electromagnet which is energized until the
lost motion connecting means; between the ?ne
'controlled member is out of ‘phase with the pri
and coarse receiver rotors permitting relative ro
mary member by an amountcorresponding to less
tation of the ?ne synchronizer receiver rotor and
the coarse synchronizer receiver rotor in either 15 than a halt turn of the ?ne receiver rotor rela
tive to ‘the ?ne transmitter rotor.
direction from a neutral or midway condition of
9. In a remote control mechanism which in
the lost motion means limited in extent to an
cludes a primary control member at a transmit
amount corresponding to less than a half turn
ting or‘ control station and a controlled member
0! the ?ne receiver rotor, said lost motion means
at either limit establishing a positive drive in one 20 at a receiving station which is required, when
under the in?uence oi the remote control mecha
direction of rotation between the coarse and ?ne
nism, to bemaintained in phase with the primary
receiver rotors of the same ratio as that which is
control member subject to ?ne tolerances 013 er
maintained between the transmitting rotors of
ror, in combination, a coarse synchronizer com
the synchronizers, switch means operated by said
lost motion means and made effective thereby 25 prising a transmitter rotor at the control sta
tion, a receiver rotor at the receiving station, and
when the lost motion has been exhausted in either
means for causing the receiver rotor t'o corre
direction, and electromagnetic means controlled
spond in phase with the transmitter rotor sub
by said switch means for rendering the ?ne re
ject to a lag of limited extent, a ?ne synchronizer
ceiver rotor non-responsive to the ?ne transmit
ter rotor until the controlled member is out of 30 comprising a transmitter rotor at the control sta
phase with the primary control member by an
tion, a receiver rotor at the receiving station, and
means for causing the receiver rotor to corre
amount correspondingito less than a half turn
spond in phase with the transmitter rotor subject
of the ?ne receiver rotor relative .to the ?ne
to a lag oi’ limited extent, means for driving the
transmitter rotor.
8. In a remote control mechanism which in 35 coarse and ?ne transmitter rotors from the pri
, cludes a primary control member at a, transmit
mary control member at speeds which bear a ?xed
ting or control station and a. controlled member ' relationship to one another, the latter at a speed
at a receiving station which is required, when
substantially in excess of the former, a power
under the in?uence of the remote control mech
ampli?er at the receiving station comprising op
anism, to be maintained. in phase with the pri 40 posed hydraulic slip drives, a valve for inversely
mary control member,_ subject to ?ne tolerances
controlling the positiveness of said drives, a low
of error, in combinationra coarse synnhronizer
power control shaft, and a high torque output
comprising a transmitter rotor at the control
shaft for driving the controlled member, the for
station, a receiver rotor at the receiving station,
mer shaft being driven by the receiver rotor of
and electrical means for causing the receiver ro
the fine synchronizer, lost motion means con
tor to correspond in phase with the transmitter
necting the receiver rotors, means responsive to
rotor subject to a lag of limited extent, a ?ne
said lost motion means when the lost motion ex
synchronizer comprising a transmitter rotor at
ceeds a, predetermined limited value for render
the control station, a receiver rotor at the re
ing the ?ne receiver rotor non-responsive to the
ceiving station, and electrical means for causing 50 ?ne transmitter rotor, and means also responsive
thé'receiver rotor to correspond in phase with
to the lost motion means for actuating the valve
the transmitter rotor subject to a lag of limited
to cause the high torque output shaft to be set
extent, means for driving the coarse and ?ne - into operation and maintained in operation for
transmitter rotors from the primary control mem
driving the controlled member‘and‘for limiting
ber at speeds which bear a fixed relationship to 55 the speeds of the receiver rotors of both syn
one another, the latter at a speed substantially
chronizers until the controlled member is out of
in excess of the former, means driven by the
phase with the primary. control member by an
receiver rotor of the ?ne synchronizer for con
amount corresponding to'less than one-half turn
trolling the operation of the controlled member,
of the ?ne receiver rotor relative to the ?ne
means for connecting the synchronizers to a
source of electrical energy, lost motion connecting
means between the ?ne and coarse receiver ro
tors permitting relative rotation of the ?ne syn
chronizer receiver rotor‘ and the coarse syn-'
transmitter rotor.
‘
‘
10. In a remote control mechanism which in
cludes a primary control member. at a transmit
ting or control station and a controlled member
at a receiving station which is required, when
chronizer receiver rotor in either direction from 65 under the in?uence of the remote control mech
anism, to be maintained in phase with the pri
means limited in extent to an amount corre
mary control member, subject to ?ne tolerances
a neutral or midway condition of the lost motion
sponding to less than a half turn of the ?ne re
of error, in combination, a coarse synchronizer
ceiver rotor, said lost motion means at either
comprising a transmitter rotor" at the control sta
limit establishing a positive drive in one direc 70 tion, a receiver rotor at the receiving station, and
tion of rotation between the coarse and ?ne re
electrical means for causing the receiver rotor
ceiver rotors of the same ratio as that which is
to correspond in phase with the transmitter rotor
maintained between the transmitting rotors of
subject to a lag of limited extent, a fine synchro
the synchronizers, a switch member operated by
nizer comprising a transmitter rotor at the ‘con—
said lost motion means, a pair of electromagnets, 75 trol station, a receiver rotor at the receiving sta
2,403,490
19
'
tion, and electrical means for causing the receiv
er rotor to correspond in phase with the trans
mitter rotor subject to a lag of limited extent,
means for driving the coarse ‘and ?ne transmit- -
ter rotors from the primary control member at
speeds which bear a ?xed relationship to one.
another, the latter at a speed substantially in
excess of the former, lost motion means connect
ing the ?ne and coarse synchronizer receiver ro
20
‘
which is maintained between the transmitting
rotors of the synchronizers, a power ampli?er at
the receiving station comprising a low power con
trol shaft driven by‘ the ?ne receiver rotor, a high
torque output shaft for driving the controlled
member, a high torque input shaft, opposed hy
draulic slip drives between the high torque input
shaft and the high torque output shaft, a valve
for inversely controlling the positiveness of the
tors and permitting relative rotation of the ?ne 10 drives, and differential gearing of limited output
jointly operated by the low power control shaft
synchronizer receiver rotor and the coarse syn
and the high torque output shaft, means for con
chronizer receiver rotor in either direction from
necting the synchronizers to a source of electrical
a neutral or midway condition of the lost motion
energy, a switch member operated by said 10st
means limited in extent to a motion correspond
ing to .less than a hall.’ turn of the ?ne receiver 15 motion means, a pair of electromagnets, a pair
of circuits including the respective electromag
rotor, said lost motion means at either limit
nets and adapted to be selectively closed by the
establishing a positive drive in one direction of
switch means in accordance with the'direction
rotation between the coarse and ?ne receiver
in which the switch means is moved by the lost
rotors of the same ratio as that which is main
tained between the transmitting rotors of the syn 20 motion means, means responsive to energization
of either of the electromagnets for rendering the
chronizers, a power ampli?er at the receiving sta
?ne receiver rotor nonresponsive I to the ?ne
tion comprising a low power control shaft driven
transmitter rotor, means selectively responsive to
by the ?ne receiver rotor, a high torque output
the electromagnets for shifting the valve to a
shaft for driving the controlled member, a high
torque input shaft, opposed hydraulic slip drives 25 position to establish and maintainrotation of the
between the high torque input shaft and the high
high torque output shaft to operate the controlled
torque output shaft, a valve for inversely con
member in one direction or the other according,
trolling the positiveness of the drives, and di?er
ential gearing of limited output jointly operated
to the electromagnet which is energized until the
controlled member is out of phase with the prl
by the low power control shaft and. the high 30 mary control member by an amount correspond
ing to less than a half turn of the ?ne receiver
torque output shaft, means responsive to the lost
motion means for rendering the ?ne receiver
rotor relative to the ?ne transmitter rotor, said
' rotor non-responsive to the ?ne transmitter rotor .
high torque output shaft, during such operation,v
acting through the ?ne receiver rotor and the
when the lost motion is exhausted in either di-_
rection, and means also responsive to the lost 35 lost motion connecting means positively to hold
downthe speed of the coarse receiver rotor and
motion means for actuating said valve independ
thereby to assure correspondence of operation of
ently of motion of the low power control shaft
to set the high torque output shaft into operation
the coarse receiver rotor and the controlled
member.
and to maintain it in operation until the con
12. In a remote control mechanism which in
trolled member and the primary control member 40
cludes a primary control member at a transmit
are out of phase by an amount not greater than
the available lost motion.
'
ting or control station and a controlled member
at a receiving station which is. required, when
11. In a remote control mechanism which in
cludes a primary control member at a transmit
under the in?uence of the remote control mech
ting or control station and a controlled member 45 anism, to be maintained in phase with the pri
at a receiving station which is required, when
mary control member subject to ?ne tolerances
under the in?uence of the remote control mech
of error, in combination, a coarse synchronizer
anism, to be maintained in phase with'the pri
comprising\a transmitter rotor at the control sta
mary control member, subject to fine tolerances
tion, a receiver rotor at the receiving station, and
of.error, in combination, a, coarse synchronizer 50 means for causing the receiver rotor to corre
comprising a transmitter rotor at the control sta
tion, a receiver rotor at the receiving station, and
electrical means for causing the receiver rotor to
correspond in phase with the transmitter rotor
subject to a lag of limited extent, a ?ne synchro
nizer comprising a transmitter rotor at the con
trol station, a receiver rotor at the receiving sta
tion, and electrical means‘for causing the receiver
rotor to correspond in phase with the transmitter
spond in phase with the transmitter r'otorsubject
to a lag of limited extent, a ?ne synchronizer
comprising a transmitter rotor at the control sta
tion, a receiver rotor at the receiving station, and
means for causing the receiver rotor to corre
spond in phase with the transmitter rotor'subject
to a lag of limited extent, means for controlling
the coarse and ?ne transmitter rotors from the
primary control member, the former at the speed
rotor subject to a lag of limited extent, means for 60 of the primary control member and the latter at
driving the coarse and ?ne transmitter rotors
a ?xed multiple of that speed, differential means
from the primary control member at speeds which
driven jointly by the two receiver rotors, and a
bear a ?xed relationship to one another. the latter
power ampli?er for driving the control member,
at a speed substantially in excess of the former,
said ampli?er including a control member con
lost motion means connecting the ?ne and coarse
nected to be responsive to said differential means.
synchronizer receiver rotors and permitting rela
13. A remote control mechanism which includes
tive rotation of the ?ne synchronizer receiver
a primary control member at a transmitting or
rotor and the coarse synchronizer receiver rotor
control station and a controlled member at a
in either direction from a neutral or midway con
receiving station which is required, when under
dition of the lost motion means limited in extent 70 the in?uence of the remote control mechanism,
to a-motion corresponding to less than a half
to be maintained in phase with the primary con
turn of the ?ne receiver rotor, said lost motion
means at either limit establishing a positivev drive
trol member subject to ?ne tolerances of error,
in combination, a pair of synchronizers each com
in one direction of rotation between the coarse
prising rotors at the transmitting and receiving
and ?ne receiver rotors of the same ratio as that 75 stations, respectively, and means for causing the
2,408,490
21
receiving rotor of each synchronize: to seek and
maintain phase correspondence with the trans
the speed of the rotor of the coarse synchronizer,
di?erential means at the receiving station jointly
operated by the receiving rotors of the two-syn
mitting rotor of the same synchronizer, means
‘for driving the transmitting rotors from the pri
chxonizers, and means at the receiving station '
mary control member at speeds bearing a, ?xed
controlled by said di?erential means for driving
B
relation to one another, the rotor of the ?ne syn
the controlled member.
.
chronizer at a speed considerably in excess of
WILLIAM A. BLACK.
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