Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
  • B63C9/00—Life-saving in water
  • B63C9/21—Boats, rafts, buoys or the like, characterised by signalling means, e.g. lights, reflectors
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
  • H01Q15/14—Reflecting surfaces; Equivalent structures
  • H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
  • H01Q15/20—Collapsible reflectors

Definitions

• the invention relates to a deployable boat roof, preferably as part of an inflatable life raft, with means for reflecting radar beams in the form of at least one collapsible locating reflector, which can be erected together with the roof body by unfolding it and, when erected, preferably two reflecting surfaces crossing at right angles and one at whose lower end forms a reflection surface arranged at right angles to it.
• the approximately hemispherical roof body carries a passive direction finder on top in the form of a collapsible so-called triple mirror ice, the outer edges of which are covered with air hoses that are inflated together with the floating and other support hoses of the life raft and thereby unfold and set up the radar reflector.
• the invention has for its object to provide a deployable boat roof with means for reflecting radar beams according to the type described above, which has no gas-carrying, easily vulnerable components, which reduces top load, offers low wind resistance and therefore not avoids desired sailing properties and is finally effective with little manufacturing effort.
• the boat roof can be easily and closely folded together with the direction finder, while on the other hand it is ensured that a geometrically perfect reflector is available after deployment.
• the reflector is ge particularly light in weight, so that it can also be carried steadily by the usually light boat roofs of conventional life rafts, beyond the usual support hoses for the boat roof, no measures are required to support the reflector. Manual retrofitting can also be carried out easily.
• FIG. 1 is a simplified representation of a view of a vertical section through a boat roof with a radar reflector along the line A - A in Fig. 2,
• Fig. 2 is a view of the unfolded boat roof with radar reflector from above.
• the boat roof 10 is preferably the approximately hemispherical roof of an inflatable life raft in the unfolded state, which is equipped in a conventional manner with support tubes for the roof, not shown in the drawing. However, it can also be the partially open roof cap of a rigid lifeboat or a sports boat, the roof shape being maintained in the unfolded state by means of a bow.
• a radar reflector 11 On top of the roof body 10 is a radar reflector 11 in Form of a triple mirror with four horizontal reflection surfaces 12 and eight vertical reflection surfaces 13 attached.
• the reflection surfaces 12, 13 each have the shape of a right-angled triangle, so that the base surface of the triple mirror formed from the surfaces 12 is a square (FIG. 2).
• the triangular reflection surfaces 13 rise on the diagonals of these squares, which, with their edges directed towards the center, form a receiving channel 24, for example, by means of binding bands there, into one
• Cavity are interconnected.
• a central point 14 At the lower end of the channel 24 and in the middle of the square there is a central point 14 at which all reflection surfaces 12, 13 meet.
• rods 15 made of somewhat flexible plastic are arranged towards the central point 14 and end at a comparatively short distance from the central point 14.
• a further rod 16 rises on the central point 14 in the channel 24, which extends to the tip of the reflection surfaces 13 of the reflector 11.
• the rods 15, 16 together with the reflector surfaces 12, 13 form an umbrella-like deployment frame, the rods providing the required tension and shape retention in the final state of the deployment.
• the connection of the rods 15, 16 with the reflector 11 is done by a trim, which is composed of two textile discs 17, 18 and a spout 19.
• the setting disc 17 is above the rods 15, the setting disc 18 below the same, and to fix the rods 15 at the central point 14, the setting discs 17, 18 are sewn together in such a way that a pocket 20 is formed for each rod 15. Since the disks 17, 18 have a diameter which is approximately half the edge length of the Re flexion flat 12 corresponds to the square formed, the rods 15 are inserted a little less than half in the pockets 20; on the outside they are in pockets 25, which are arranged at the corners of the square under the reflection surfaces 12.
• the upstanding rod 16 is inserted with its lower end in the spout 19, which in turn fits into the channel 24 from below.
• the attachment of the reflector 11 on the roof body 10 is done here in a simple manner by means of adhesive 21, which is located between the lower shim 18 and the top of the roof body 10.
• the attachment can also be carried out in other ways, for example detachably by means of push buttons.
• the four corners of the square formed from the reflection surfaces 12 are connected to the roof body 10 by means of rubber cords 22, an adhesive joint 23 in each case being provided on the latter.
• the rubber cords 22 are so long that the base of the reflector 11, composed of the reflection surfaces 12, is held in one plane with the rods 15 in the stretched state.
• the roof 10 with the reflector 11 can easily be folded up according to a certain scheme and packed in a packaging bag or container.
• the reflector 11 When unfolding - either automatically as with most inflatable life rafts or manually as with lifeboat and yacht roofs - the reflector 11 is stretched like an umbrella and sits tightly on the roof. Boat movements under the influence of wind and waves can practically not affect the geometry of the light reflector.
• the movable linkage of the rods 15 near the center Point 14 of the reflector can also be done in other ways than by means of textile washers 17, 18, for example by means of a wire ring, not shown in the drawing, which includes the central point 14 and on which the inwardly facing ends of the rods 15 are hinged.
• the boat roof 10 can also be equipped with two reflectors 11, these being arranged next to one another and each with their reflection surfaces 12 at an angle of approximately 45 degrees with respect to the water surface, so that a locating pulse running parallel to the water simultaneously on three sides of the Triple mirror meets.
• the boat roofs designed according to the invention make a significant contribution to the fact that the rescue equipment equipped therewith can be found more easily and quickly by the ships or aircraft looking for them after the watering in an emergency, which greatly increases the chance of survival of the rescue equipment occupants who are in distress. This also contributes to the fact that the stability of the caps is not impaired in any way by the direction-finding device according to the invention and undesirable sailing properties of the rescue devices are avoided.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Aerials With Secondary Devices (AREA)
• Tents Or Canopies (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6113351

Family Applications (1)

Country Status (10)

Cited By (2)

Families Citing this family (2)

Citations (5)

Family Cites Families (1)

• 1980
  • 1980-10-01 DE DE19803037079 patent/DE3037079A1/de active Granted
• 1981
  • 1981-09-29 GB GB08215662A patent/GB2101409B/en not_active Expired
  • 1981-09-29 WO PCT/DE1981/000156 patent/WO1982001279A1/en active IP Right Grant
  • 1981-09-29 AU AU76460/81A patent/AU7646081A/en not_active Abandoned
  • 1981-09-29 EP EP81902747A patent/EP0061481B1/de not_active Expired
  • 1981-09-29 NL NLAANVRAGE8120370,A patent/NL183747C/xx not_active IP Right Cessation
• 1982
  • 1982-05-27 DK DK240982A patent/DK153614C/da not_active IP Right Cessation
  • 1982-05-28 SE SE8203339A patent/SE453703B/sv not_active IP Right Cessation
  • 1982-05-31 FI FI821922A patent/FI71636C/fi not_active IP Right Cessation
  • 1982-06-01 NO NO82821813A patent/NO155519C/no unknown

Patent Citations (5)

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