Underwater antenna device with a non-stationary antenna and underwater vessel

Abstract

The invention relates to an underwater antenna device with a nonstationary antenna, an extension mechanism and a repositioning mechanism, wherein an extending force can be applied in a direction of the extending force by the extension mechanism of the antenna and an opposing force can be applied in a direction of the opposing force, in the opposite direction to the extending force by the repositioning mechanism of the antenna, characterized in that the repositioning mechanism or a part of the repositioning mechanism is designed as selectively nonstationary, so that, by selected changes to the position, the antenna can be positioned in a retracted position, an extended position or an intermediate position.

Claims

1. An underwater antenna device comprising a nonstationary antenna, an extension mechanism and a repositioning mechanism separate from the extension mechanism, wherein the extension mechanism is arranged to apply an extending force to the antenna and the repositioning mechanism is arranged to apply an opposing force to the antenna counteracting the extending force, wherein the repositioning mechanism or a part of the repositioning mechanism is movable, so that by selectively changing a position of the repositioning mechanism the antenna can be positioned in a retracted position, an extended position or an intermediate position due to a combination of the extending force and the opposing force, wherein the antenna is extendable by a pneumatically activated telescopic cylinder, which is held by a pulling cable in a retracted position and comprises a pressure compartment, wherein the pulling cable is wound onto a cable drum having a drive unit configured to control the extension and repositioning of the telescopic cylinder, and the pressure compartment is connected to an expansion tank configured to assist the extension of the antenna.

2. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force are parallel to one another or form an angle with an angle value greater than 0.

3. The underwater antenna device in accordance with claim 1, wherein the repositioning mechanism comprises the cable drum with the pulling cable arranged at a fixed location of the underwater antenna device at the antenna and the cable drum, and the drive unit is attached to the cable drum, arranged to apply a rotation to the cable drum, so that winding or unwinding of the pulling cable takes place by means of the rotation.

4. The underwater antenna device in accordance with claim 3, wherein the drive unit comprises a multiphase motor.

5. The underwater antenna device in accordance with claim 3, wherein the repositioning mechanism comprises a drive shaft, on which the cable drum is arranged so as to be movable, and a synchronizing element, wherein the cable drum, the drive shaft and the synchronizing element are arranged so that a cable lead-off point is at a level with the antenna, so that the pulling cable is positioned in direct alignment with the antenna.

6. The underwater antenna device in accordance with claim 3, wherein the pulling cable is guided inside the telescopic antenna.

7. The underwater antenna device in accordance with claim 1, wherein the antenna is a telescopic antenna comprising at least a first and second telescope sections and only one of said sections forms a radio antenna.

8. The underwater antenna device in accordance with claim 7, wherein the telescopic antenna additionally comprises third, fourth, and a fifth telescope sections.

9. The underwater antenna device in accordance with claim 7, wherein a signal and/or energy supply for the radio antenna is arranged within the telescopic antenna.

10. The underwater antenna device in accordance with claim 1, wherein the extension mechanism permanently or connectably applies the extending force to the antenna and wherein the extension mechanism comprises a device selected from the group consisting of: a hydraulic device and a pneumatic device and an electric motor.

11. The underwater antenna device in accordance with claim 1, comprising an antenna position sensor.

12. An underwater vessel which has an underwater antenna device in accordance with claim 1.

13. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force form an angle with an angle value greater than 5.

14. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force form an angle with an angle value greater than 15.

15. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force form an angle with an angle value greater than 45.

16. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force form an angle with an angle value greater than 65.

17. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force form an angle with an angle value greater than 90.

18. The underwater antenna device in accordance with claim 1, wherein the direction of the extending force and the direction of the opposing force are parallel to one another.

19. The underwater antenna device in accordance with claim 1, wherein the cable drum has a friction clutch.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantageous embodiments will emerge as a result of the subclaims and of the exemplary embodiments outlined in more detail with reference to the drawings. In the drawings:

(2) FIG. 1 is a lateral view of a torpedo formed in sections,

(3) FIG. 2 is a partially cutaway lateral view of an antenna section of a torpedo according to FIG. 1,

(4) FIG. 3 is a magnified representation of a section of the antenna section according to FIG. 2,

(5) FIG. 4 is a cutaway view of the antenna section according to FIG. 2 in the sectional plane A-A in FIG. 3,

(6) FIGS. 5 and 6 are magnified representations of the opposing wall sections of the antenna section according to FIG. 3,

(7) FIG. 7 is a cross-sectional view in the sectional plane R-R in FIG. 3,

(8) FIG. 8 is a cross-sectional view in the sectional plane P-P in FIG. 3,

(9) FIG. 9 is a cross-sectional view in the sectional plane M-M in FIG. 3.

(10) FIG. 10 is a cross-sectional view in the sectional plane N-N in FIG. 3.

DETAILED DESCRIPTION

(11) FIG. 1 shows a schematic representation of a torpedo 1 designed in sections. The bow of the torpedo 1 is formed by a sonar head 2, which has a torpedo sonar to reconnoiter the nearer surroundings of the torpedo 1. A section 3 has an explosive charge. Alternately, this section, as an exercise section, is provided with devices used to be able to find and recover the torpedo 1 following an exercise. The torpedo 1 also incorporates multiple battery sections 4, 5, 6, 7, which are arranged centrally in the exemplary embodiment depicted in order to achieve as even as possible a weight distribution. In addition, the torpedo 1 incorporates a guidance section 8 and an antenna section 9, which is described in more detail below. The antenna section 9 has a radio antenna 10, which can be extended telescopically. Radio communications equipment for transmission and/or receiving is also arranged in the antenna section.

(12) The antenna section 9 can be built into a torpedo 1 formed in sections with little difficulty, so that torpedoes need not be completely reconstructed. The antenna section 9 has an interface (not depicted), by means of which the positional data of the guidance section 8 obtained via the radio antenna 10 can be transferred. Taking the positional data obtained into consideration, the guidance section 8 generates control signals for controlling the rudder devices 11, 12 of the torpedo 1, for navigation and for determining the depth of the torpedo 1.

(13) In addition, the torpedo 1 incorporates a communications management section 13 and a drive train section 14, in which a motor is arranged for driving two opposed propellers 15, 16. The rudder devices 11, 12 are components of a rudder section 17. The antenna section 9 is described in more detail below by means of FIGS. 2 to 10. Here, in each instance, the same reference numerals are used for the same components in all of the figures.

(14) The antenna section 9 comprises a torpedo housing 18 of the designated caliber of the torpedo 1. The respective adjacent sections of the torpedo 1 can be connected to the faces 19, 20. The antenna section 9 has a radio antenna 10, which can be extended by means of a pneumatically operated telescopic cylinder 21. Here, when the radio antenna 10 is in the retracted position, this is flush with the torpedo housing 18 and the radio antenna 10 is retracted across the surface of the torpedo housing 18, so that the radio antenna 10 does not affect the caliber of the torpedo.

(15) The telescopic cylinder 21 comprises multiple telescopic tubes 22, 23, 24, 25, inserted parallel into one another, which are arranged in a radial direction in the antenna section 9. Here, the telescopic cylinder 21 is arranged in a radial direction relative to the torpedo 1 so that the telescopic tubes 22, 23, 24, 25 can be extended upwards in the designated orientation of the torpedo 1, i.e. in the direction of the surface of the water.

(16) The telescopic tubes 22, 23, 24, 25 are incorporated in a fixed external cylindrical tube 26, which extends through an opening in the torpedo housing 18 inside the antenna section 9 and is introduced in a pressure-tight manner into the torpedo housing 18. For this purpose, a cup-shaped insert 27 with a tapered seating is inserted into the opening of the torpedo housing 18. A bearing support 28 is bolted to the insert 27, which has a friction bearing 29 for the outer telescopic tube 22 and is seated on the face of the cylindrical tube 26. The bearing support 28 is sealed with the insert 27 by means of a gasket 28a.

(17) The inner cylindrical tube 25, which can be extended the furthest, supports a plate-shaped antenna support 30, in which the radio antenna 10 is incorporated. The radio antenna 10 is connected to a signal processing device (not depicted) via an antenna cable 31, which is fed through the antenna support 30. The antenna cable 31 runs through the interior 32 of the internal cylindrical tube 25.

(18) The radio antenna 10 is arranged on the outside of the antenna support 30 and is, in particular, an antenna board. The radio antenna 10 is attached to the antenna support 30 with a mounting 32 under a casting compound 33 permeable to radio signals. The antenna support 30 is inserted into the inner telescopic tube 25 with a pin 39 and is fastened here, namely in the exemplary embodiment depicted, by means of a thread. The antenna support 30 overlaps the extendable telescopic tubes 22, 23, 24, 25 and thus, on retracting the telescopic cylinder 21, is positioned on the extended ends of the respective telescopic tubes 22, 23, 24, 25 in sequence and telescopes these.

(19) The telescopic tubes 22, 23, 24, 25 are inserted into each other, wherein an end stop 34, facing radially outwards, is designed on the rear ends of each of the telescopic tubes 22, 23, 24, 25, from the direction of extension (FIG. 6). The end stops 34 can each be extended as far as an end stop on the inside, which is attached to the respective tube, encompassing the telescopic tube 22, 23, 24, 25 concerned. The end stops 34 limit the extension length of the telescopic cylinder 21 by a combination of the end stops, which extend in the direction of extension to the outer ends of the telescopic tubes 22, 23, 24, 25, inside the telescopic cylinder. These end stops are each formed by a spacer 35. Each spacer 35 is inserted into a notch, which is formed in the inside of the respective tube. An end stop is provided on the fixed cylindrical tube 26 for the outer extendable telescopic tube 22. The end stop for the outer extendable telescopic tube 22 is thus formed by the bearing support 28, which projects into the gap between the outer extendable telescopic tube 22 and the fixed cylindrical tube 26 to form the end stop.

(20) The spacers 35 for the respective telescopic tubes 22, 23, 24, 25 are located at different intervals to the respective end stops of the inner ends of the telescopic tubes 22, 23, 24, 25, so that slightly different extension lengths are formed and jamming the telescopic tubes 22, 23, 24, 25 on retracting the radio antenna 10 is counteracted.

(21) The telescopic tubes 22, 23, 24, 25 are each guided at both ends, wherein a friction bearing 36 is arranged inside at each forward end of the telescopic tubes 22, 23, 24, in the direction of extension. The outer telescopic tube 22 is guided in the friction bearing 29, which is inserted in the bearing support 28. The friction bearings 36 for the inner telescopic tubes 23, 24, 25 are designed as rotary friction bearing bushes.

(22) In a further exemplary embodiment, bearing strips are provided as friction bearings. Each rear end of the extendable telescopic tubes 22, 23, 24, 25, in the direction of extension, is guided by means of the radial end stops 34, which extend to the inner surface of the adjacent tube and have guides.

(23) The telescopic tubes 22, 23, 24, 25 are manufactured from a semi-finished product as turned parts, so that optimal wall thicknesses and precisely arranged notches for arranging the friction bearings 36 and the notches for the spacers 35 can be formed.

(24) The telescopic cylinder 21 in the present exemplary embodiment comprises four concentrically arranged telescopic tubes 22, 23, 24, 25, wherein the inner three telescopic tubes 23, 24, 25 are designed with a circular cross-section. The outer telescopic tube 22, which is inserted in the fixed cylindrical tube 26, is designed with a greater cross-sectional length in the longitudinal direction of the torpedo 1 than a cross-sectional width in the transverse direction of the torpedo 1; cf. FIG. 4.

(25) The outer telescopic tube 22 has an elongated cross-section with a greater length in the longitudinal direction of the torpedo than a cross-sectional width in the transverse direction of the torpedo. In the exemplary embodiment depicted, the outer telescopic tube 22 has an oval cross-section for this reason, with two parallel, even sides, which are connected by round faces. Thus, there is a high bending stiffness in the longitudinal direction of the torpedo with, at the same time, a reduced flow resistance, so that, when the telescopic antenna is extended, the fluid mechanics forces due to the flowing water, which affect the telescopic tube 22, are reduced. In further exemplary embodiments not depicted, the outer telescopic tube 22 is formed with streamlined cross-sections in other than a circular shape.

(26) For storage of the outer telescopic tube 22 with a non-circular cross-section, the bearing support 28 attached to the torpedo housing 18 is formed with a corresponding, non-circular cross-section, wherein the friction bearing 29 of the bearing support 28 is formed as a bearing strip.

(27) In an alternative exemplary embodiment, the friction bearing 29 is a component made from friction bearing material with a cross-section corresponding with that of the telescopic tube 22.

(28) The pressure compartment 38 of the telescopic cylinder 21 is delimited by the pin 39 of the antenna support 30 and by a piston 40, designed in a circular ring-shape, which is attached at the inner end of the non-circular telescopic tube 22. The pressure compartment 38 thus has a pneumatic effective surface, which is formed by a circular partial area of the pin 39 and a circular partial area of the piston 40 of the external telescopic tube 22. The piston 40 seals the pressure compartment 38 against the fixed external tube 26 and, at the same time, forms an end stop, which combines with the end stop of the bearing support 28 and delimits the extension pathway of the outer telescopic tube 22.

(29) The antenna section 9 also has a gas reservoir 41. In the exemplary embodiment, the gas reservoir 41 is a gas canister mounted in the antenna section 9, in which a compressed gas supply is provided. The gas reservoir 41 is connected to a pressure reducer unit 43 by means of a high-pressure line 42, which communicates with the pressure compartment 38 by means of a low-pressure line 44. The high-pressure line 42 and the low-pressure line 44 are each connected to the pressure reducer unit 43 by means of a coupling 45. The pressure reducer unit 43 is adjusted to the designated operating pressure in the pressure compartment 38, with which the telescopic cylinder 21 is operated. The pressure reducer unit 43 reduces the comparatively high static pressure in the gas canister from, for example, 200 bar, to the operating pressure of, for example, 4.5 bar. Due to the high pressure in the gas canister, a large gas supply is provided for a large number of pneumatic operations of the telescopic cylinder 21.

(30) In addition, an expansion tank 46 is connected at the pressure compartment 38, which tank substantially increases the volume of the pressure compartment 38. Thus, a compression on retracting the telescopic cylinder 21 results in a markedly lower increase in the operating pressure in the pressure compartment 38 than without this type of expansion tank 46. Due to the arrangement of the expansion tank 46, the increase in the operating pressure amounts to approximately 30%, wherein the compressed operating gas in the expansion tank 46 assists the extension of the radio antenna 10 on the next extension maneuver.

(31) In other words, due to the arrangement of the expansion tank 46 and the associated substantial increase in the volume of the pressure compartment 38, there is an improved recovery of the working fluid.

(32) The static pressure in the pressure compartment 38 affects both the ring-shaped surface of the piston 40 of the outer telescopic tube 22 and the circular effective surface of the pin 39 of the antenna support 30. Here, the ring-shaped effective surface of the piston 40 is greater than the effective surface of the antenna support 30, so that, on extending the telescopic cylinder 21, the external telescopic tube 22 is initially moved pneumatically. The telescopic tubes 23, 24 arranged in the center between the inner telescopic tube 25 and the outer telescopic tube 22 are each coupled to the respective adjacent telescopic tubes by means of adapter rings 47 and are taken along during the extension movement by means of the adapter rings 47. Here, the adapter rings 47 each engage in a notch at the free end of the respective telescopic tube 23, 24 and are engaged in an undercut at the respective externally adjacent telescopic tube 22, 23. Thus, on extending the telescopic cylinder 21, the outer telescopic tube 22 with the non-circular, streamlined cross-section is initially extended, wherein the three concentric inner telescopic tubes 23, 24, 25 are taken along. After the outer telescopic tube has reached its extension length, the static pressure in the pressure compartment 38 pushes the inner telescopic tube 25 out, which, in turn, after reaching its extension length, draws out the two remaining concentric telescopic tubes 23, 24 in succession.

(33) The telescopic cylinder is held in the stationary retracted position against the static pressure in the pressure compartment by a pulling cable 48. The pulling cable 48 is a textile cable, which is mounted on the antenna support 30. A bolt 37 is provided in the pin 39 of the antenna support 30 to mount the pulling cable 48.

(34) Due to the traction on the cable 48, the telescopic cylinder 21 is retracted from the extended position and held in the retracted position. For this purpose, the pulling cable 48 is wound onto a cable drum 49, which is arranged adjacent to the inner end of the telescopic cylinder 21, i.e. on that side of the telescopic cylinder 21, which faces its direction of extension.

(35) The antenna cable 31 is designed as a coiled cable 50 in a section located inside the telescopic cylinder 21, whereby, on the one hand, it is ensured that the antenna cable 31 is ductile on extending the telescopic cylinder 21 by means of the provided extension length of the telescopic cylinder 21. On the other hand, the coiled cable 50 forms a guide for the pulling cable, which is guided by the surrounding coils of the coiled cable 50. The ductile extension length of the coiled cable 50 is thus adapted to the extension length of the three concentric, inner telescopic tubes 24, 25, 26. In addition, the antenna cable 31 is formed into a further coiled cable 51 in the area of the piston 40 of the outer, non-circular telescopic tube 22. The ductile length of the second coiled cable 51 of the antenna cable 31 is thus adjusted to the extension length of the outer telescopic tube 22. In order to prevent the formation of undesired loops in the antenna cable 31, the antenna cable in the area of the coiled cable 50, 51 is provided with an anti-twist safeguard. As an anti-twist safeguard, the antenna cable 31 in the area of the coiled cable 50, 51 is reinforced by being wrapped in an elastic wire or alternately with a coil spring.

(36) The cable drum 49 is incorporated in an end housing 52, whose interior communicates with the pressure compartment 38, so that the pulling cable 48 is entirely incorporated in the pressure compartment 38. Elaborate pressure sealing of the pulling cable 48 can therefore be dispensed with. Together with the telescopic cylinder 21, the end housing 52 with the cable drum 49 arranged therein forms one structural unit, which is arranged in a cross-sectional plane of the torpedo 1, i.e. extending between the opposing wall sections of the torpedo housing 18. Here, the end housing 52 has a mounting pin 53, which is incorporated pressure-proof in the torpedo housing 18 using a greased O-ring 54. To adjust and seal the combined component consisting of the telescopic cylinder 21 and the end housing 52 precisely, an adjusting screw 55 and a special screw 56, accessible from outside the torpedo 1, are arranged on the mounting pin 53.

(37) The cable drum 49 can be driven rotationally by means of a drive shaft 57, which is mounted in the end housing 52. The drive shaft 57 is a part of the drive train of a drive unit 58, which has a self-locking worm gear 59, a friction clutch 60 and an electric motor 61. The friction clutch 60 responds on reaching its nominal torque and disrupts the transmission of drive power from the motor 61 to the cable drum 49. The friction clutch 60 is designed as a magnetic coupling and comprises permanent magnets, whereby the friction clutch 60 is also immediately operational after a longer storage period, without adhesion of the components.

(38) To extend the telescopic cylinder 21, the electric motor 61 drives the cable drum 49 in a rotational direction, which is delivered to the pulling cable 48 and, as a result, the telescopic cylinder 21 is pneumatically displaced by the operating pressure in the pressure compartment 38. To retract the telescopic cylinder 21, the electric motor 61 drives the cable drum 49 in the opposite rotational direction, so that the pulling cable is wound onto the cable drum 49 and thus the antenna support 30 is retracted.

(39) The extension processes and the retraction processes of the radio antenna 10 are controlled by means of the activation of the drive unit 58, wherein the cable drum 49 is moved around such an angle of rotation by the drive unit 58, with which the quantity of the unwound cable length provided in the process corresponds. In the process, the self-locking worm gear 59 guarantees that the cable drum 49 is only able to move where there is a drive due to the motor.

(40) The nominal torque of the friction clutch 60, with which the friction clutch 60 is triggered, is calibrated using the desired cable length of the pulling cable 48 on retracting the radio antenna 10. The nominal torque is selected or adjusted so that the friction clutch 60 responds on reaching a certain wound cable length of the pulling cable 48 on retracting the radio antenna 10 and disrupts the transmission of drive power. Thus, the winding of the pulling cable 48 on retracting the radio antenna 10 is stopped once the nominal torque of the friction clutch 60 has been reached.

(41) The cable length to be unwound is controlled on extending the radio antenna by means of the motor 61. For this purpose, the motor 61 for driving the cable drum 49 is preferably designed as a multiphase motor. Here, the multiphase motor is moved by that number of steps, which corresponds with the circumferential angle of the cable drum 49 with the designated cable length. The cable length to be unwound, which is associated, for the multiphase motor, with the number of steps, is calibrated with the cable length to be unwound so that the pulling cable 48 is under tension in any operational position of the radio antenna 10. Advantageously, in the process, the motor 61 moves through a smaller number of steps than for winding the pulling cable 48, so that tension 25 always remains in the pulling cable on extending the radio antenna 10. Where there is a subsequent retraction maneuver, the friction clutch 60 guarantees winding up to the desired tension in the pulling cable 48.

(42) The pulling cable 48 is arranged so as to be unrestricted and without coming into contact with the telescopic cylinder and is continuously held under tension by the cable drum 49 so that the antenna support 30 is held in the closed position and sealed. In order to continuously hold the pulling cable in the vertical direction, the cable drum 49 can be moved longitudinally on the drive shaft 57 and coupled to a synchronizing element 62, which will be outlined in more detail below, so that the cable lead-off of the cable drum is fed to a fixed lead-off point in the center of the telescopic cylinder 21.

(43) The mechanics affecting the cable drum 49 for feeding the cable lead-off is outlined below by reference to FIG. 3, 6 and the cutaway representation in FIGS. 7 to 10. The drive shaft 57 extends through the end housing 52 in the longitudinal direction of the torpedo 1 and is mounted on the forward walls 63, 64 of the end housing 52. Here, a forward wall 63 facing the drive unit 58 is formed as a single section in the end housing 52. A forward wall 64 is arranged on the side facing the end housing 52, which accommodates the free end of the drive shaft 57.

(44) The cable drum 49 is arranged on the drive shaft 57 so as to be longitudinally movable. Here, an interlocking catch is provided so that the cable drum 49 can be driven so as to rotate by means of the drive shaft 57. This type of interlocking catch with simultaneous longitudinal moveability is provided in the present exemplary embodiment by a fitted key connection 65. Here, a key has been incorporated into the cable drum 49. A key notch adapted for the key has been provided in the drive shaft 57.

(45) The cable drum 49 is provided with a surrounding cable groove, into which the pulling cable 48 is wound in a defined position. In each operational position of the radio antenna 10, the pulling cable 48 is under tension so that the pulling cable 48 is held securely in the cable groove.

(46) The free end of the drive shaft 57 is provided with an adjustment thread 66 over a length, which is approximately equivalent to the length of the coil body of the cable drum 49. Here, the axial length of the section of the drive shaft 57 provided with the adjustment thread 66 is approximately equivalent to the range of movement of the cable drum 49 provided on feeding the cable lead-off. A disk-shaped synchronizing element 62 is arranged on the adjustment thread 66, which is fed in the direction of the drive shaft 57 so as to be longitudinally displaceable, independently of the cable drum 49.

(47) The axial guide of the synchronizing element 62 is provided by a guide rail 67, which is fed through the end housing 52, parallel to the drive shaft 57. As can be seen in the plan view of the synchronizing element 62 in FIG. 9, the disk-shaped synchronizing element 62 conceals the sidewall of the cable drum 49 and is guided on the guide rail 67 by a radial lug 67a. Where the drive shaft 65 rotates, the rail-guided lug 67a on the guide rail 67 prevents a rotating synchronization of the synchronizing element 62, whereby the synchronizing element 62 is displaced by the adjustment thread 66 in the longitudinal direction of the drive shaft 57. Here, the displacement path of the synchronizing element 62 in the longitudinal direction of the drive shaft 57 corresponds precisely with the gradient of the adjustment thread 66.

(48) The gradient of the adjustment thread 66 of the drive shaft 57 is equal to the gradient of the cable groove of the cable drum. With a full revolution of the drive shaft 57, the synchronizing element 62 is accordingly displaced via a path, which is equivalent to the gradient between the wound coils of the pulling cable 48.

(49) The synchronizing element 62 affects the cable drum 49 arranged so as to be longitudinally displaceable in the direction of the longitudinal direction of the drive shaft 57 and thus feeding the cable lead-off of the cable drum 49 effectuates its guidance accordingly on the adjustment thread 66 when the drive shaft 57 rotates.

(50) In order to enable a drawing movement on winding the pulling cable 48 on the cable drum 49 for the synchronizing element 62, the synchronizing element 62 has an axial catch 68, which extends to near the facing side wall 69 of the cable drum 49. The axial catch 68 is kinematically connected to the side wall of the drum 69 by means of a coupling plate 70. The coupling plate 70 is constructed in two sections, with two approximately semicircular segments 70a, 70b (FIG. 8). The plate segments 70a, 70b are each attached to the cable drum 49 by means of bolt or rivet connections.

(51) The inner radius of the plate segments 70a, 70b, which determines the diameter of the coupling plate 70 when the plate segments 70a, 70b are assembled, has a greater diameter than the drive shaft 57, so that the coupling plate 70 can be displaced in the longitudinal direction of the drive shaft 57 without intruding in the adjustment thread 66. The two-part coupling plate 70 can be easily mounted on the cable drum 49, by placing the plate segments 70a, 70b in the gap between the sidewall of the drum 69 and the catch 68, around the drive shaft 57 and fixing these to the sidewall of the drum 69.

(52) A partition plate 71 is arranged in the end housing 52 in the longitudinal direction of the drive shaft 57, which separates the part of the end housing 52, in which the cable drum 49 is movably arranged, from the rest of the end housing 52. The partition plate 71 is inserted in guides 72, which are formed on each opposing section of the wall of the end housing 52. To attach the partition plate 71, brackets 73 are provided in the area of the front wall 64, in which the drive shaft 57 is mounted, which are mounted on the front wall 64.

(53) In the exemplary embodiment depicted, the front wall 64, in which the drive shaft 57 is mounted, conceals the part of the pressure compartment 38 with the cable drum 49 arranged therein. The end housing 52 is sealed in a pressure-tight manner by a seal wall 74, which conceals the entire cross-section of the end housing 52.

(54) The seal wall 74 is mounted so as to be detachable, so that the interior of the end housing 52 is accessible. Thus, a cable lead-through 75 is accessible, which is arranged in the subspace 76 of the end housing 52 on the other side of the cable drum 49. The cable lead-through 75 accommodates the antenna cable 31 and is sealed to the pressure compartment 38.

(55) The pressure compartment of the telescopic cylinder 21 can be ventilated by means of a pressure release valve 77, so that moisture can be discharged. Ventilating the pressure compartment is advantageous, for example, immediately after assembling the antenna section 9, in order to discharge moisture or after testing the torpedo 1, in order to reduce the increased operating pressure in the pressure compartment due to multiple activations of the antenna, if required. In normal operation of the torpedo 1, ventilation of the pressure compartment is not required or desired. The pressure release valve 77 is activated, for example, after test firing in order to depressurize the system. In this way, hazards which could come about due to the torpedo being under pressure after the end of an exercise/test firing, such as a tear in the textile cable, are reliably precluded. The hazard to divers is also precluded by equalizing the pressure via the pressure release valve 77.

(56) All characteristics in the foregoing description and referred to in the claims can be applied in accordance with the invention, both individually and in any combination with one another, in particular, essential characteristics can be adapted to the hydraulic solution or the electric motor solution. The disclosure of the invention is therefore not limited to the combinations of characteristics described or claimed. Rather, all combinations of individual characteristics should be viewed as having been disclosed.