EP0061481B1 - Entfaltbares bootsdach mit passiver peilvorrichtung - Google Patents

Entfaltbares bootsdach mit passiver peilvorrichtung Download PDF

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Publication number
EP0061481B1
EP0061481B1 EP81902747A EP81902747A EP0061481B1 EP 0061481 B1 EP0061481 B1 EP 0061481B1 EP 81902747 A EP81902747 A EP 81902747A EP 81902747 A EP81902747 A EP 81902747A EP 0061481 B1 EP0061481 B1 EP 0061481B1
Authority
EP
European Patent Office
Prior art keywords
roof
boat
bracing
reflector
members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81902747A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0061481A1 (de
Inventor
Henning Peters
Bruno Sturzenbecher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoflug GmbH
Original Assignee
Autoflug GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoflug GmbH filed Critical Autoflug GmbH
Publication of EP0061481A1 publication Critical patent/EP0061481A1/de
Application granted granted Critical
Publication of EP0061481B1 publication Critical patent/EP0061481B1/de
Expired legal-status Critical Current

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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 location reflector, which can be erected together with the roof body and, when erected, preferably two first reflection surfaces intersecting at right angles and one on the roof side thereof End forms a second reflection surface arranged at right angles to it.
  • An inflatable life raft with means for reflecting radar beams is already known (DE-AS 11 19 707).
  • the approximately hemispherical roof body carries a passive direction finder on top in the form of a collapsible so-called triple mirror, 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.
  • this training is associated with the disadvantage that the hose structure sitting like a heavy crown on the roof of the life raft is top heavy causes the capsizing stability, which is fundamentally critical in life rafts, is adversely affected.
  • a radar reflector for use in missiles or the like which, although it has an arrangement of the tensioning and form-retaining members for the reflection surfaces along their abutting edges, is a heavy construction which must be built by means of a special spring and which would lead to an unfavorable top load in inflatable life rafts.
  • 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, reduces the top load, has no installation elements to be triggered separately, offers low wind resistance and thus avoids undesirable sailing properties and is ultimately 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 weight of the reflector is particularly light, so that it can also be carried steadily by the usually light boat roofs of conventional life rafts.
  • no measures are required to support or unfold the reflector. Manual retrofitting can also be carried out easily.
  • 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 in 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 in the form of a triple mirror with four horizontal reflection surfaces 12 and eight vertical reflection surfaces 13 is fastened on top of the roof body 10.
  • 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 ones rise on the diagonals of this square Reflection surfaces 13 which, with their edges directed towards the center, form a receiving channel 24, in that they are connected to one another, for example by means of binding tapes, to form a cavity.
  • 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. At a similar distance, 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 takes place through a common trim, which is composed of two textile trim discs 17, 18 and a grommet 19 forming the grommet-shaped trim part.
  • the shim 17 is above the rods 15, the shim 18 below it, and to fix the rods 15 at the central point 14, the shims 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 corresponds approximately to half the edge length of the square formed from the reflection surfaces 12, the rods 15 are inserted somewhat 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 reflecting 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 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 together according to a certain scheme and packed in a packaging bag or container.
  • the reflector 11 When unfolding - be it 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 tight on the roof. Boat movements under the influence of wind and waves can practically not affect the geometry of the light reflector.
  • the movable articulation of the rods 15 near the central point 14 of the reflector can also be done in a different way than by means of textile shims 17, 18, for example by means of a wire ring, not shown in the drawing, which includes the central point 14 and at which the inwardly pointing ends of the Chopsticks 15 are attached movably.
  • the boat roof 10 can also be equipped with two reflectors 11, which are arranged next to one another and are each inclined with their reflecting surfaces 12 by approximately 45 degrees with respect to the water surface, so that a locating pulse running parallel to the water occurs simultaneously on three sides of the triple mirror.
  • 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 undesired 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)
EP81902747A 1980-10-01 1981-09-29 Entfaltbares bootsdach mit passiver peilvorrichtung Expired EP0061481B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803037079 DE3037079A1 (de) 1980-10-01 1980-10-01 Entfaltbares bootsdach mit passiver peilvorrichtung
DE3037079 1980-10-01

Publications (2)

Publication Number Publication Date
EP0061481A1 EP0061481A1 (de) 1982-10-06
EP0061481B1 true EP0061481B1 (de) 1986-02-05

Family

ID=6113351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902747A Expired EP0061481B1 (de) 1980-10-01 1981-09-29 Entfaltbares bootsdach mit passiver peilvorrichtung

Country Status (10)

Country Link
EP (1) EP0061481B1 (enrdf_load_stackoverflow)
AU (1) AU7646081A (enrdf_load_stackoverflow)
DE (1) DE3037079A1 (enrdf_load_stackoverflow)
DK (1) DK153614C (enrdf_load_stackoverflow)
FI (1) FI71636C (enrdf_load_stackoverflow)
GB (1) GB2101409B (enrdf_load_stackoverflow)
NL (1) NL183747C (enrdf_load_stackoverflow)
NO (1) NO155519C (enrdf_load_stackoverflow)
SE (1) SE453703B (enrdf_load_stackoverflow)
WO (1) WO1982001279A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347389A1 (de) * 1983-12-29 1986-02-20 Ballonfabrik See- und Luftausrüstung GmbH & Co KG, 8900 Augsburg Vorrichtung zur reflexion von radarwellen fuer ortungszwecke
DE3712079A1 (de) * 1987-04-09 1988-10-20 Marc Andrees De Ruiter Radarreflektor
RU2767017C1 (ru) * 2021-05-12 2022-03-16 Федеральное государственное бюджетное учреждение науки Институт проблем морских технологий Дальневосточного отделения Российской академии наук (ИПМТ ДВО РАН) Модульный надувной радиолокационный отражатель
US11623718B2 (en) * 2021-07-13 2023-04-11 Alfred Joseph Koontz, IV Beanbag with storage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000447A1 (en) * 1977-07-15 1979-01-24 John Hewitt Firth Radar reflector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119707B (de) * 1958-11-26 1961-12-14 Chemring Ltd Aufblasbares Rettungsfloss mit Mitteln zur Reflexion von Radarstrahlen
US3019457A (en) * 1959-01-23 1962-02-06 Chemring Ltd Inflatable rubber dinghies
GB947064A (en) * 1959-07-02 1964-01-22 Dunlop Rubber Co Improvements relating to inflatable reflectors for radio waves
GB1111381A (en) * 1963-10-23 1968-04-24 Pains Wessex Ltd Improvements in and relating to reflectors
DE2814088C2 (de) * 1978-04-01 1984-07-05 Wilhelm 2168 Drochtersen Klöckner Radar-Reflektor für Rettungs-Flöße oder -Boote

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000447A1 (en) * 1977-07-15 1979-01-24 John Hewitt Firth Radar reflector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Druckschrift "Radar Corner Reflectors" der Firma Chemring Limited, Alchem Works, Fratton Trading Estate, Portmouth P04 8SX, England *

Also Published As

Publication number Publication date
DK153614B (da) 1988-08-01
DE3037079C2 (enrdf_load_stackoverflow) 1989-01-26
FI71636C (fi) 1987-01-19
NL8120370A (nl) 1982-08-02
WO1982001279A1 (en) 1982-04-15
NL183747C (nl) 1989-01-02
FI821922A0 (fi) 1982-05-31
FI71636B (fi) 1986-10-10
GB2101409B (en) 1985-02-27
NO155519C (no) 1987-04-08
SE453703B (sv) 1988-02-22
DE3037079A1 (de) 1982-04-29
GB2101409A (en) 1983-01-12
EP0061481A1 (de) 1982-10-06
NO155519B (no) 1986-12-29
DK153614C (da) 1988-12-19
SE8203339L (sv) 1982-05-28
NL183747B (nl) 1988-08-01
AU7646081A (en) 1982-04-28
DK240982A (da) 1982-05-27
NO821813L (no) 1982-06-01

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