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Патент USA US2408412

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Oct. 1, 1946.
_
\
R. s. CURRY,.JR.
_
2,408,411
I
EREGTING XEBIS FOR GYRO VERTICAL INSTRUIENTS
Original Filed‘June 29; 1942
FIG!
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FIG. .4
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I
ix
' HG. 2
' R05??? CURRY, JR
' BY
7 g
‘
_'
WHEY, " ' ‘l
2,408,411
Patented Oct. 1, 1946
UNITED STATES PATENT OFFICE
2,408,411
'EREG'I‘IN G MEANS FOR
INSTRUMENTS
,
>
VERTICAL
‘
Robert s. ‘Curry, J12, Baldwin; N.'Y., assignor to
Sperry Gyroscope ‘Company,~lnc., a corpora
tion'cf vNew York
Continuation of applicationSerial No. 448,980,
June 29, 1942. This application August 16,
1944, Serial No. 549,712
(Cl. 745-59
17 Claims.
1 .
,
i 4 which is pivotally mounted at 15 on the gimbal
ring support for the gyro vertical instrument.
Arm I4 is counterbalanced about its pivot 15 by
This invention relates generally to gyro verti
cal or gyro arti?cial horizon instruments and par
ticularly concerns a controller by which the hear
ing case of the instrument is ‘erected, upon tilt,
in a direct path so that the spin axis of the gyro ‘
rotor is maintained vertical with a minimum of -
conical oscillation. The present application is a
continuation of parent application Serial No.
means of the counter weight 16. Movement of
the arm 14 and consequently the reference bar
I2 is effected by a suitable linkage arrangement
(not shown) which connects the same to the rotor
bearing case of the gyro vertical.
»
.
The conventional type of gyro vertical instru
One of the features of the present invention 10 ment shown in the drawing includes a univer
sal mounting provided in this instance by the cas
consists in the provision of a novel type of erect
ing H! which provides fore and aft ‘positioned
ing means for such an instrument in the form of
bearings (not shown), with respect to the craft
a. repeater motor which is mounted on the gyro
on which the instrument is mounted, which re
rotor bearing case and positions an eccentric mass 1
about the normally vertical axis of the instru 15 ceive the trunnio-ns of a gimbal ring I1 so that
the same is con?ned to movement about a nor
ment so that it is positioned upon tilt approxi
mally horizontal axis. The mask element I3 and
mately 90 degrees from the low side of the gyro
448,980, ?led June 29, 1942.
'
casing.
pivot [5 for the horizon bar 12 are situated on
_
this ring in the usual fashion.
To so position the motor, I employ ‘a gravita
The gyro rotor
tionally responsive liquid ‘level switch for exciting 20 bearing case I8 of the instrument is also mounted
in a conventional way in the gimbal ring by means
the repeater motor coils properly to achieve the‘
or further suitable bearings (not shown) situ
above result.
ated in the ring and athwartship extending
Other features and structural details of the in
trunnions, with reference to the craft, one of
vention will be apparent from the following de
scription when read in connection with the ac
companying drawing wherein:
'
Fig. l is a side elevation assembly view with
parts in section showing an erecting controller
constructed in accordance with the present in
vention embodied for use in a gyro vertical in
strument of the arti?cial horizon indicating type.
Fig. 2 is an enlarged perspective view show
ing the detail structure of a half sectionrof the
improved motive controlled erecting means.
25 which is indicated at 19 in the drawing.
The
athwartship de?ned axis of the rotor bearing
case I8 is normally horizontal and is situated in
perpendicular relation to the fore and aft located
axis of the gimbal ring H, the gyro rotor hear
30 ing case 18 consequently being universally sup
ported within the outer casing ID. The gyro rotor
(not shown) is situated within the rotor bearing
case in a suitable manner, the same spinning
about 'a nominally vertical axis. When the case
3 is a schematic view and wiring diagram
48 tilts about one or both its axes of universal
showing a desirable electrical arrangement ‘of
the parts of the erecting controller, and
support, the spin axis of the gyro rotor of the
instrument correspondingly inclines frm a nor
mally vertical or erected position. The controller
of the present invention hereinafter described
Fig. 4 is a view similar to Fig. ‘Sillustrating the
electrical arrangement of they parts for a modi
?ed form of controller.
'
'
With reference particularly to ‘Fig. 1, the gyro
provides for the maintainence of such position by
the directed application of atorque about one of
the axes of the universal support of the instru
vertical instrument with which the present mo
ment. The gyro rotor may be spun pneumati
tive controlled erecting means is illustratively
cally; electrically or in any other desired man
depicted is shown of conventional form. In the
present instance, the conventional type of gyro 45 ner, although in the instant case I prefer to em
ploy an electrically driven rotor which may be of
vertical instrument shown in the drawing pro
conventional construction and is supplied by a
vides the stabilizing means for an arti?cial hori
suitable source of three phase alternating cur
zon indicating type of gyro controlled device, al
rent electrical energy such as indicated at 20, in
though it will be understood that such usage'of
Figs. 3 and 4. Such energy is led to the rotor
the invention is illustrative of a single practical
embodiment of the same. As shown, such a de
vice is constructed to include an outer casing I9
having a front window II through which the
observer views the position of horizon reference
bar I2 with respect to a mask element I3 and a
suitable lubber line indication (not shown) which
may be provided on the window ll of the device.
The horizon reference‘ indication or bar l2 for this
‘bearing case 13 of the instrument by way of
suitable slip rings (not shown) at the axis of the
vase I8 and axis or the ring I‘! from the exterior
of the outer casing “I.
With reference also to
2, 3 andli. the mo~
tive controlled erecting means of the present in
vention is shown to include an electric motor of
the repeater or positional type, comprising a stator
2| which is mounted on the rotor bearing case
conventional type of gyro controlled device is
of usual form, the same including a long arm. 60 by means of a hollow vertically‘ extending post
2,408,411
3
4
22. The lower end of post 22 is suitably ?xed in
cover 35 when the case l8 tilts.
position in the top Wall of the gyro rotor bearing
case. The stator 2| of the motor may include a
strument is properly erected, it will be under
plurality of circumferentially located poles 23,
When the in
stood that the bubble 38 is centrally situated with
respect to the face of the disc-shaped cover 35
each of which is provided with a radially extend
which it contacts. Reference is made to the co
ing core, in this instance. The stator is wound
pending application of Muma, Wilson and Has
in polyphase fashion, the windings of the same
kins, Serial No. 495,298 ?led July 19, 1943, for
being indicated at 24. As shown in Fig. 3, a two
Liquid level switches for a more detailed descrip
phase type of stator winding is utilized whose re
tion of this considered type of switch.
spective windings 24' and 24" are arranged in 10
With reference to Fig. 3, the switch provided
90° angular spaced electrical relation. With this
for operation with the two phase type of con
type of stator in which corresponding groups or
troller constructed in accordance with the pres
pairs of such windings are employed, it will be
ent invention includes a pair of oppositely dis
understood that when both sets of windings are
posed contacts 40—4|!' situated in parallel rela
energized there will be no resultant magnetic ?eld 15 tion in the switch with respect to the axis of the
produced by the stator to e?ect movement of the
gimbal ring IT or fore and aft axes of the craft.
electrical rotor of the controlling motor. Fig. 4
A second pair of contacts 4|--4|' are arranged
shows‘an alternative form of winding for the
in the switch to be correspondingly related to the
stator 2| in which the same is wound in three
axis of the rotor bearing case l8 or athwartship
phase fashion .having corresponding groups of 20 axis of the craft.
windings 24', 24" and 24"’ arranged in 60° angu
The circuit connections for the type of erecting
lar spaced electrical relation. Also, in this alter
means shown in Fig. 2, may be tapped from two
native form of the invention there is no mag
of the leads supplying three-phase electrical en
netic ?eld produced when the windings are all
ergy to spin the gyro rotor if such an arrangement
energized to move the rotor.
25 is employed, and may include lead 42 from“ the
The rotor of the erection controlling means is
source to the common contact 43 for the ?ve
designated at 25, the same in this instance sur
contact type of switch shown in this instance.
rounding the stator 2| and being formed to in
Lead 44 which is another lead to the sourceof
clude a plurality of inwardly extending poles 26
energy supplies energy directly to the stator fur
and corresponding core elements. The rotor 25
nishing the same to both the pairs or sets of
is a single phase wound type, the winding for
windings 24'-24' and 24"—24". Leads 45 and
the same being indicated at 21. Suitable means
46 are respectively connected to athwartship 10
are provided for mounting the rotor for move
cated switch contacts 4| and 4|’. The v‘other
ment about an axis de?ned by the post 22 which
windings 24"—-24" are connected to switch con
axis is also coincident with the spin axis of the 35 tacts 43-40’ by way of leads 4'! and 48 respec
gyro rotor contained Within the gyro rotor bear
tively. A continuous ?ow of energy is supplied
ing case I8. ,As shown, such mounting means
the winding 21 of the rotor from the source by
includes a base forming holding plate 28, bearing
way of leads 49 and 50 through the slip rings 3|.
29 and thrust bearing 30, Fig. 1. The circumfer
In operation of the erecting controller, it will
ential surface of the plate 28 is also provided 40 be understood that when the case |'8 tilts so that
with slip rings 3| by which energy is supplied
the spin axis of the gyro rotor departs from a
the same by way of suitable brushes (not shown)
vertical position, the switching means is oper
mounted on a cover member 32 which encloses
able to e?ect selective energization of the respec
the motor construction.
The cover member 32
tive two-phase type windings of the controlling
is, in this instance, suitably ?xed to the top of 45 motor, such that the unbalanced mass isposi
‘the gyro rotor bearing case l8. An unbalancing
mass 33 is situated on the rotor plate 28 which
is angularly positioned in the operation of the
controller so that the weight of the same is effec
tive to exert a torque about one of the axes of
tioned 90 degrees from the low side of the gyro
scope. For example, if the case I8 tilts because
of movement of the gimbal ring H, the bubble
38 (Fig. 3) moves in an upward or downward di
rection as viewed in this ?gure and opens, or
universal mounting of the gyro rotor bearing case
to restore the spin axis of the gyro rotor to its
‘partially opens, the normally closed switch by
uncovering, partially or wholly, either contact
normally vertical position, it being understood
4| 0r 4|’. This opens the circuit through wind¢
that such torque is exerted in the proper direction
ings 24'-24’ of the two-phase stator, or lessens
to correct the tilted condition of the case.
55 the current flowing therethrough, and the ?eld
In order to selectively energize di?erent wind
of the remaining energized windings 24"—24" is
ings of the stator 2| and thereby obtain a di
then effective to move the unbalanced rotor 25Vto
recting ?eld which combines with the ?eld of the
the position above indicated, in which the mass
rotor 25 to move the rotor so that the unbalanc
33 is enabled to exert a torque that corrects the
ing mass 33 on the same is properly positioned, 60 tilt of the case in a straight line and Without set
I employ a vertical reference maintaining switch
ting up conical oscillation.
. ,
ing means which is gravitationally controlled.
Similar operation of the controller is obtained
Such switching means, as shown, is constructed
from the three-phase wound type stator shown in
in the form of a liquid level controlling type of . Fig. 4. In this instance, it is necessary to employ
switch which is mounted on the bottom of the 65 a liquid level type switch having seven contacts,
gyro rotor bearing case |8 by means of the ?xed
connecting member 34. The switch proper is
formed of a disc shaped top portion 35 con
the common contact being indicated at 43'. The
other contacts are designated at 5B—53’, 5|-5|’,
and 52-—52'. Paired windings 24'—-24’ are con-g
nected to contacts 5|—5|' by way of leads 53
structed of a suitable insulating material such as
porcelain and includes a current conducting 70 and 54. The fore and aft situated contacts 50
spherically-shaped bottom portion 36 which is
?xed to the cover. The chamber provided be
tween the respective parts is ?lled with a current
50’ are connected to windings 24"’—24"’ by
means of leads 55 and 56. Also leads 5'! and 58
connect the paired windings 24"--24" to con
conducting fluid 31 except for a bubble 38 which
tacts 52'-52. It will be understood that the six
moves over the inwardly disposed face of the 75 selective contacts 50e-5U', 5|-—'5|', and 52—-52’
2,408,411
5 .
izontal axis, a gyro rotor bearing case supported
in said ring for movement about a'normally hor
one another and from the center of the face of
the top portion 35 of the switch.
6
ported in said casing for movement about a hor
are situated in equidistantly ‘spaced relation from
Also, in this
form of the invention one or two of the wind
izontal axis perpendicular to the axis of the ring,
ings may be rendered ineffective by the switch.
It will also be appreciated that the improved con
troller is equally e?ective in operation by an elec
trical repeater motor of direct current design and
the same may be employed without departing
' for maintaining vertical erection of the spin axis
the stator windings.
As many changes couldbe made in the above
construction and many apparently widely differ
ent embodiments of this invention could be made
without departing from the scope thereof, it is
intended that all matter contained in the above
description or shown in the accompanying draw
ing shall be interpreted‘ as illustrative and not
axes of support for effecting selective energiza
tion of the windings of said stator to move said
gravitationally unbalanced rotor to an angular
position in which the weight of the same is effec
tive to exert a torque about a horizontal axis sub
stantially normal to the axis of the tilt.
9. Erecting means of the character claimed in
claim 8, in which the stator is two-phase wound
and the switching means is provided by a liquid
a gyro rotor supported in said case for spinning
about a normally vertical axis, a repeater motor
of the gyro rotor including a multi-wound'stator
and a gravitationally unbalanced rotor,said mo
from the herein disclosed invention. It is also 10 tor being mounted in the case with the axis of the
rotor coincident with the spin axis of the gyro
apparent that the motor may be controlled by a
rotor, ‘and gravitationally operative switching
selective type switch of the character shown that
means responsive to tilt of the case about its
operates to make instead of break the circuit to
in a limiting sense.
What is claimed is:
_
~
1. Erecting means for gyro vertical instru
ments having av gyro rotor bearing case compris
ing a motor mounted on the case, having a poly
level controlling type switch having one common
contact and two oppositely disposed pairs of se
lective contacts.
10. Erecting means of the character claimed in
claim 8, in which the stator is three-phase wound
and the switching means is provided by a liquid
level controlling type switch having one common
source of electrical energy for said motor, and a
vertical reference maintaining switching means 30 contact and three oppositely disposed pairsof se
phase wound type stator and a gravitationally
unbalanced, single phase Wound type rotor, a
responsive to tilt of the case for effecting selec
tive energization of the windings of said poly
phase wound type stator to move said gravita
tionally unbalanced rotor to a position in which
the same is e?ective to exert a tilt correcting 35
lective contacts.
‘
11. A gyro rotor bearing case having an erect- '
ing controller mounted thereon in the form of a
motor having a polyphase wound type stator and
agravitationally unbalanced, single phase wound
type rotor movable about an axis coincident with
the spin axis of the gyro rotor.
2. Erecting means for gyro vertical instru
12. A gyro rotor bearing case of the character
ments, as claimed in claim 1, in which the stator
claimed in claim 11, in which the stator is two
is two-phase wound.
3. Erecting means for gyro vertical instru 40 phase wound.
13. A gyro rotor bearing case of the character
ments, as claimed in claim 1, in which the stator
claimed in claim 11, in which the stator is three-7
is three-phase wound.
‘
phase Wound.
4. Erecting means for gyro vertical instru
14. A gyro rotor bearing case of the character
ments, as claimed in claim 1, in which the switch
45 claimed in claim 11, which includes thereon a;
ing means is gravitationally controlled.
controlling switch of the liquid level type.
5. Means for maintaining the spin axis of the
15. A gyro rotor bearing case of the character
gyro rotor of a gyro vertical instrument in a nor
claimed in claim 11, in which the stator is two
mally erected position comprising the combina
phase wound, and which includes thereon a con
tion of, a universally mounted gyro rotor bear
ing case, an erecting controller in the form of a 50 trolling switch of the liquid level type having one
common contact and two oppositely disposed
motor, mounted on said case, having a polyphase
pairs of selective contacts.
wound type stator and a gravitationally unbal
torque on the instrument.
'
anced, single phase wound type rotor movable
16. A gyro rotor bearing case of the character
claimed in claim 11, in which the stator is three
gyro rotor, a source of electrical energy for said 55 phase wound, and which includes thereon a con
trolling switch of the liquid level type having one
motor, and gravitationally operative switching
common contact and three oppositely disposed
means mounted on and responsive to tilt of the
pairs of selective contacts.
case for effecting selective energization of the
17. Erecting means for gyro-vertical instru-v
windings of said polyphase wound type stator to
move said gravitationally unbalanced rotor to an 60 ments having a rotor bearing case, comprising a
repeater motor mounted on said case having a
angular position in which the weight of the same
multi-wound stator and a gravitationally unbal
is effective to exert a torque to correct the tilt.
anced rotor mounted for turning about a vertical
6. Means of the character claimed in claim 5,
axis on said‘ case, a gravitationally responsive
in which the stator is two-phase wound and the
switching means is provided by a liquid level con 65 switching means responsive to relative tilt of said
casing and means for effecting selective ener
trolling type switch having ?ve ‘contacts.
gization of the windings of said stator, and'so
'7. Means of the character claimed in claim 5,
connected thereto as to-move said gravitational
in which the stator is three-phase wound and the
ly unbalanced rotor to a position in which the
switching means is provided by a liquid level con
trolling type switch having seven contacts.
70 center of gravity thereof lies substantially 90 de
grees from the low side of the gyroscope.
8. Erecting means for arti?cial horizon type
gyro vertical instruments’ comprising the com
ROBERTS. CURRY, Jn.
bination of an outer casing, a gimbal ring sup
about an axis coincident with the spin axis of the
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