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Патент USA US2412356

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'
Dec. 10,1946.
‘
F. H. ROBERTS ETAL
2,412,356
APPARATUS FOR THE AUTOMATIC ADJUSTMENT OF THE ANGLE 0F ELEVATION OF GUNS
Filed March 19, 1942
2 She'ets-S‘neei. 1
Fig.1. ‘
*m/
12/
A TTORA/EYS
Dec. 10, 1946.
F, H, ROBERTS ErAL
2,412,356
APPARATUS FOR THE AUTOMATIC ADJUSTMENT OF‘ THE ANGLEYOF ELEVATION OF GUNS
Filed March 19, 1942
2 Sheets-Sheet 2
Fig’. 4.
WWW
BX
A TTORIVEYS- '
2,412,356
Patented‘ Dec. 10, 1946
UNITED STATES
PATENT 'QFFECE '
1 2,412,356
APPARATUS FOR, THE AUTOMATIC ADJUST- ‘
MENT OF THE ANGLE OF ELEVATION OF
GUNS .
Frank Hooson Roberts and’ Johann Hermann
Abbink-Spaink, Jesmond, Newcastle-on-Tyne
2, England, assignors to Vickers-Armstrongs
Limited, London, England, a British company
Application March 19, 1942, Serial No. 435,350
In Great Britain March 19, 1940.
7 Claims. (Ci. 89-41)
.
This‘invention relates to apparatus for the au
tomatic adjustment of the angle of elevation of
guns or equivalent operation in which the angle
of correction required is not necessarily constant.
_
2
"
I
v
Figure 3 is a similar view illustrating an alter
native arrangement;
Figure 4 is a. wiring diagram'illustratlng an
’ electrical method of varying the angular displace
In this connection with guns the angle of correc- 5 ment between the initiating and cancelling Selsyn
tion differs for different elevations. That is to
units; and _
‘
say, as applied to guns the present apparatus is
_ Figure 5 illustrates diagrammatically the elec
adapted to impart into the elevational movement
trical method disclosed in Figure 4.
a correction necessary to compensate for falling
In the following description the invention is de
oil or variation in muzzle velocity as a result of 10 scribed as applied to a power transmission sys
barrel wear or due to other causes, or to correct
tem including two Selsyn units I and 2 compris
for any variation in the range or length of trajec
. ing rotors la and 2a and stators lb and 2b, the
tory due, for example, to atmospheric conditions,‘
two stators being electrically connected together,
the chief object being to evolve apparatus which
the windings of the rotor 2a of the Selsyn unit 2, .
will effectively and automatically introduce the '15 usually referred to as the receiver or resetting‘
necessary correction in a simple manner.
An
other object of the invention is to ‘apply correc
unit, being connected with a source of A. C. sup
ply, the windings of the other rotor la of the
tion to the elevating mechanism of the gun as a
transmitter Selsyn unit being connected with an
‘ function of the elevation adjustment as supplied
electric motor or the like 3 through the medium
to the transmitter of the apparatus for the auto- 20 of a thermionic ampli?er 4, the latter being con
matic adjustment of the elevation of the gun.
trolled in its amplifying action according to the
The invention is concerned with electricalv
angular displacement existing between the rotors
transmission systems employing synchronous mo
of the two Selsyn units, the armature of the mo
tors of the Selsyn type in the signal and follow
tor 3 being mechanically coupled with the rotor
up part of the system, such motors being general- 25 2a of the receiver unit so that rotation of the mo
ly known as Selsyn units, one such unit 'consti- .
tor will eventually bring the rotors into coinci
tuting the initiating unit or transmitter and an
dence, the electric motor, through the medium of
a other similar unit the cancelling unit or receiver,
both Selsynunits being so connected to a ther
an hydraulic power ampli?er indicated diagram
matically at IS in Figs. 2, 3 and 5 moving the gun
mionic ampli?er that the latter is controlled in 30 20 in elevation until such time as coincidence ex
its amplifying action according to the angular
ists between the two .Selsyn units, the direction
displacement existing between the rotors of the
of rotation of the electric motor being dependent
two units, the thermionic ampli?er having its out
upon the direction of displacement of the one ro—v
put applied to an electric motor associated with
tor relative to the other.
i
the rotor of the. cancelling unit and serving, 35
If, therefore, there occurs an angular displace
therefore, to bring the two Selsyn units again into
ment between the two Se'lsyn units and if this dis
coincidence, the electric motor being connected
placement is increased or decreased by suitable
with the gun to be moved in elevation through the
means, an increased or decreased elevational
medium of an hydraulic power ampli?er. Such
movement will be imparted to the gun to com
a form of electric distant transmission system em- 40 pensate for variation in muzzle velocity or for any
ploying Selsyn units forms the subject‘ of copend
other purpose.' With this purpose in view, this
ing application for patent, Serial No. 435,356, ?led
angular displacement is increased in the manner
March 19, 1942.
shown in Figure 2 by imparting rotational move
The invention is, however, applicable to other
ment to the stator 2b of the receiver Selsyn unit
forms of electric transmission wherein movement d5 through the medium of a system of cams 5 driven _ '
of the gun is dependent upon the angular dis
from the electric motor shaft, a cam follower 6,
placement between two members.
‘
a toothed quadrant 1, and a pinion 8' associated
Referring to the drawingswith the stator 2b, the arrangement being such
Figure 1 is a wiring diagram illustrating the
that the follower 6 can be brought into engage
manner in which the Selsyn transmitter and re- 50 ment with any one or the cams by sliding it along
ceiver units are connected with the follow-up mo
its support 9 to‘suit-particular conditions, for
tor and thermionic ampli?er;
example, to suit~ a particular muzzle velocity,
thereby increasing or decreasing the number‘ of
chanical method, in which the angular displace
revolutions of the motor 3 necessary to bring the
ment between the two Selsyn units can be varied; 55 two Selsyn units into coincidence and thus in
Figure 2 illustrates diagrammatically one me
9,418s856
4
creasing or decreasing the elevational movement
imparted to the gun. In the above arrangement,
the rotor 2a (compare Fig. 1) associated with sta
tor 2b is attached to the shaft l0, and the re
ceiver Selsyn unit is connected with the electric
motor shaft II by a simple geared connection I2
but alternatively this connection maybe in the
unit and the" output movements of said power
drive device, pro?led cam means having an input
member for its working displacement and an out
put follower member for receiving correction dis
placements, a driving connection effectively op; '
- crating between the input member of said cam
means and said power drive device, meanseifec
form of a differential gear B as in the construc
tive to transmit adjustive displacements to said ' I
tion illustrated by Figure 3, and instead of rotat
elevation adjustment mechanism additional to
ing the stator to automatically increase or de-. 10 those adiustive displacements normally supplied
crease the angular displacement between the
to the transmitter, and a connection between the
units, the toothed quadrant ‘I may be arranged to
said means for transmitting additional adiustive
drive the outer member or planet carrying mem~
displacements and the output ‘member of said
ber ll of the differential gear with the object of
cam means.
,
g,
rotating the rotor 2a of the receiver Selsyn unit 15
2. Apparatus for automatic adjustment in ele
2 to increase or decrease the angular displace-‘
vation of a gun comprising an electric transmit
ment. Instead of using a number of cams, ‘each! -' .ter' unit, an electric receiver unit, a controllable
having a different degree of lift as in Figure 2,
‘power drive device in driving connection with said
a single cam I5 of tapering form may be‘sub-b. “receiver unit, a gun elevation adjustment mech
stituted, such as for example, a camoid as com 20 anism, an operative connection from said device
monly used in predictor mechanism, the follower,
to saidmechanism, electric connections between
8 associated with the camoid being movable into" , .the said transmitter and receiver units and the
any position on the cam surface to suit require-s -
controlof the power drive device forsecuring cor
,respondence of movement as between the ad
ments. In this way, the number of revolutions
necessary for the electric motor 3 to make, to
iustive movements supplied to the transmitter
bring the units into coincidence-can be in?nitely
varied between two limits. It will be appreciated
from the foregoing that the angle of correction is
.unit' and the output movements of said power
drive‘_,device, pro?led cam means having an input
member for its working displacement and an out
different for different elevations.
.
'
'
_ put follower member for receiving correction dis
As a further alternative, in lieu of the mechani-l 30 placements, the cam means pro?le being designed
cal connection for altering the angular displace
to cause the output follower member to have dis
ment between the Selsyn units, a third unit l6
may be interposed, as shown in Figures 4 and 5,
the rotor ll of which is connected with the elec
tric motor 3 through the medium of the cam 35
mechanism, shown in Figure 5, the arrangement
placements proportional to elevational muzzle ve
locity corrections when the input member has im
parted to it displacements proportional to sun
elevation, a driving connection effectively operat
ing between the input member of said cam means
being such that rotation of the rotor l1 secured
and said power drive device, means effective to
on the shaft I8 01’ the third unit will e?ect the
transmit adjustive displacements to said eleva
position of the rotor la of the transmitter Selsyn
tion adjustment mechanism additional to those
unit I associated with the thermionic ampli?er, 40 adjustive displacements normally supplied to the
the position of the rotor ll of the third unit de
transmitter, and a connection between said means
pending upon the position of the cam follower 6
for transmitting additional adjustive displace
relative to its associated cam l5 or cams 5.
The position of the cam follower 6 on the cam I.
or cams can be varied manually or in any other
suitable manner and may, in fact, be controlled
by means of a device actually measuring thev
muzzle velocity of the gun, or maybe moved in
accordance with the number of shots ?red from
the gun. For example, ‘a cam follower may be 50
arranged to be moved gradually along the cam
surface or over the cams to automatically correct
for lower muzzle velocity resulting from wear in
the barrel as wear occurs.
Although the construction of the hydraulic
power ampli?er forms no part of the present in
vention, the construction being disclosed in the
speci?cation of copending application forpatent
Serial No. 435,348, ?led March 19, 1942, the power
ampli?er is shown in Figures 2, 3 and 5, the power
ampli?er l9 being shown in geared connection 60
with the gun 20.
What we claim and desire to secure by- Letters
Patent of the United States is:
1. Apparatus for automatic adjustment in ele- _
ments and the output'member of said cam means.
' 3. Apparatus for automatic adjustment in ele
vation of a gun comprising an electric transmit
ter unit, an electric receiver unit, a controllable
power drive device in driving connection with said I
receiver unit, ‘a gun elevation adjustment mech
anism, an operative connection from said device
to; said mechanism, electrlcconnections between
.the said transmitter and receiver units and the
control of the power drive device for securing cor
respondence, of movement as between the ad
justive movements supplied to the transmitter
unit and the output movements of said power de
vice, pro?led’cam means having several cam sur- '
faces, an input member driving the cam means in
its working displacement, an output follower"
memberselectlvely engaging one of the cam sur
faces of said cam means, each such cam surface
being designed with'an assumed degree of- wear.
in the associated gun barrel soas to produce in
the follower member appropriate displacements
proportional to elevationai muzzle velocity cor
rections as a function of the elevation of the as—
vation of a gun, comprising an electric transmit
sociated gun, a driving connection e?ectively op
ter unit, an electric receiver unit, a controllable
power drive device in driving connection with
erative between the input member of said cam '
means and said power drive device, means effec
mechanism, an operative connection from said 70 tive to transmit adjustive displacements to said
elevation adjustment mechanism additional to
device to said mechanism, electric connections be
said receiver unit, a gun elevation adjustment '
tween the said transmitter and receiver units and‘
the control of the power drive device for secur
ing correspondence ofmovement as between the’
those adjustive displacements normally supplied,
- to the transmitter, and a connection between the
adiustive movements supplied to the transmitter 75
said means for transmitting additional adiustive
displacements and the output member of said
cam.
~
2,412,356
5
6
4. Apparatus for automatic adjustment in ele
power drive device in driving connection with said
elevation of a- gun, comprising a Selsyn trans
mitter unit, a Selsyn receiver unit, a controllable
power drive device in driving connection with
said Selsyn receiver unit, a gun elevation ad
receiver unit, a gun elevation adjustment mech
anism, an operative connection from said device
justment mechanism, an operative connection
from said device to said mechanism, electric
to said mechanism, electric connections between
connections between said Selsyn units and the
vation of a gun comprising an electric transmitter
unit, an electric receiver unit, a controllable
control of the power drive device for securing
the said transmitter and receiver units and the
control of the power drive device for securing
correspondence of movement as between the ad
correspondence of movement as between the ad 10 justive movements supplied to the Selsyn trans
justive movements supplied to the transmitter
mitter unit .and the output movement of said
unit and the output movements of said power
power drive device, pro?led cam means having
drive device, a camoid having several different
an input member for its working displacement
cam pro?les making up its cam surface, an input
and an output follower member for receiving
member driving the camoid in its working dis
correction displacements, a driving connection
placement, an output follower member selectively
effectively operating between the input member
engaging one of said cam pro?les, each cam
of said cam means and said power drive device,
electrical means to transmit adjustive displace- ‘
pro?le being designed with an assumed degree
' of wear in the associated gun. so as to produce
ments to said elevation adjustment mechanism
additional to those ac?ustive displacements nor
in the follower member displacements proporr
tional to elevational muzzle velocity corrections
mally supplied to the transmitter and including
as a function of the elevation of the associated
a rotor and a connection between the output
gun, a driving connection e?ectively operating
member of said cam means and said rotor.
between the input member of said camoid and
'7. Apparatus for automatic adjustment in
said power drive device, means effective to trans! 25 elevation of a gun, comprising a Selsyn trans;
mit addustive displacements to said elevation ad
mitter unit, a Selsyn receiver unit, a controllable
justment mechanism additional to those adjus
power drive device in driving connection with
tive displacements normally supplied to the
said Selsyn receiver unit, a gun elevation ad
transmitter, and a connection between said means
justment mechanism, an operative connection
for transmitting additional adjustive displace 30 from said device to said mechanism, electric con
ments and the output member of said camoid.
nections between said Selsyn units and the con
5. Apparatus for automatic adjustment in ele
trol of the power drive device for securing cor- v
vation of a gun, comprising an electric trans
respondence of movement as between the ad
mitter unit, an electric receiver unit, a control
justive movements supplied to the Selsyn trans
lable power drive device, a driving connection be 35 mitter unit and the output movement of said
tween said device and said receiver unit, a gun
power drive device, pro?led cam means having
elevation adjustment mechanism, an operative
an input member for its working displacement
connection from said device to said mechanism, - and an output follower member for receiving
electric connections between said transmitter
correction displacements, a driving connection
and receiver units and the control of the power 40 effectively operating between the input member
drive device for securing correspondence of
of said cam means and said power drive de
movement as between the adjustive movements
vice, adjustable electrical phase-displacing means
applied to the transmitter ‘unit and the output - in the connections between the Selsyn units per
movements of said power drive device, pro?led
mltting them to operate out of mechanical
‘cam means having an input member for its work-}
alignment while being in electrical alignment to
ing displacement and an output follower mem
an extent corresponding to the adjustment of
ber for receiving correction displacements, a
said adjustable phase-displacing means, and a
driving connection effectively operating between
connection between the output member of said
the input member of said cam means and said
power drive device, a differential gear inter
posed in the said driving connection between
60
cam means and said adjustable electrical phasedisplacing means to permit an out-of-alisnment
operation depending upon the displacement of
said output follower member.
FRANK HOOSON ROBERTS.
JOHANN HERMANN ABBiNK-SPAINK.
6. Apparatus for automatic adjustment in 55
the receiver unit and power drive device, and a
connection from the output member of said cam
means to the di?erential gear.
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