EP0107649A1 - Emetteur de signaux optiques de detresse - Google Patents

Emetteur de signaux optiques de detresse

Info

Publication number
EP0107649A1
EP0107649A1 EP82901545A EP82901545A EP0107649A1 EP 0107649 A1 EP0107649 A1 EP 0107649A1 EP 82901545 A EP82901545 A EP 82901545A EP 82901545 A EP82901545 A EP 82901545A EP 0107649 A1 EP0107649 A1 EP 0107649A1
Authority
EP
European Patent Office
Prior art keywords
light emitting
dome
emitting diodes
signal transmitter
distress signal
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.)
Withdrawn
Application number
EP82901545A
Other languages
German (de)
English (en)
Inventor
Owe René FORSBERG
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0107649A1 publication Critical patent/EP0107649A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/002—Distress signalling devices, e.g. rescue balloons
    • 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
    • B63C9/08—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like
    • B63C9/20—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like characterised by signalling means, e.g. lights
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light

Definitions

  • the present invention relates to an optical dist ⁇ ress signal transmitter having a source of current, a light emitter, an electric circuitry for supplying current pulses to the light emitter, and switch means.
  • optical distress signal transmitters emitting a flashlight.
  • the distress signal transmitters used hitherto suffer from shortcomings in respect of current supply and light intensity.
  • the object of the present invention therefore, is to improve the prior art optical distress signal transmitters and provide a small-size, handy transmitter which, despite its small size, emits a strong and intense light which can be perceived from a great distance. This and other objects of the invention will be achieved by means of a distress signal transmitter which is characterized by the features stated in the claims.
  • Fig. 1 is a side view of one embodiment of a distress signal transmitter according to the invention.
  • Fig. 2 is a top plan view of the same transmitter.
  • Fig. 3 sche ⁇ matically illustrates the principle of the optical per ⁇ formance of the transmitter.
  • Fig. 4 in perspective, illustrates another embodiment of a distress signal transmitter according to the invention.
  • the distress signal transmitter 10 shown in Figs. 1 and 2 has a housing 11 which accommodates batteries (not shown) and which may also hold switch means for initiating the transmitter.
  • the housing has a spring- biased clip 12 by means of which the distress signal transmitter can be clamped on e.g.
  • the distress signal transmitter has a dome-shaped holder or socket 13 for a number of light emitting diodes 14 which, according to the invention, are provided in such a number and disposed in such a geometric arrangement that at least two light emitting diodes t are visible at the same time when the socket 13 is viewed from the side or from a higher elevation with respect to the base plane of the socket.
  • there are thus provided five light emitting diodes 14 which are arranged in a ring and with an angle at centre of approximately 30° with respect to the base plane of the dome.
  • the light emitting diodes are supplied with current from an electric circuitry (not shown) which emits such current pulses to the light emitting diodes that these will emit light pulses of an intensity of about 2 cd. at current pulses with a peak value of about 180 mA.
  • the dome-shaped socket 13 is provided with a surface coating in the form of a retroreflective material of the type sold by e.g.
  • Fig. 3 thus is a " principle outline where a portion of the socket 13 and some of the light emitting diodes 14 are shown.
  • the line 15 represents a water surface which may as well be located further down, as counted from the base plane of the socket.
  • Light rays 16 from the diode 14 will be totally reflec- ted in the water surface 15 because of the low angle of incidence, whereby, when searching is conducted from an air-craft, the small distress signal transmitter will be perceived as a large luminous area on the water, the light scattering angle being very large.
  • the retroreflective coating By the use of the retroreflective coating on the dome surface, light rays 17 emitted by the diode 14 towards this surface will be reflected back through the light emitting diode and thus form part of the light rays 16. Hence, the retroreflective coating entails a substantial increase in the light intensity of the light rays 16. Also, the retroreflective coating is advantageous since it will reflect with high light density the searchlight from e.g. helicopters.
  • the dome-shaped diode socket according to the invention is designed substantially as a prismatic body 18 with approximately planar surfaces 19 around at least most of the light emitting diodes 14.
  • Fig. 4 Such an embodiment of the invention is shown in Fig. 4 where also the housing 11 has been given a different design.
  • the switch means incorporated in the distress signal transmitter has not been shown in more detail since it can be designed in many different ways.
  • the dome-shaped light emitting diode socket 18 has been designed as a separate body which is mountable by means of a bayo ⁇ net catch and is sealed with respect to the housing 11 by suitable sealing means, so as to make the distress signal transmitter waterproof.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Electromagnetism (AREA)
  • Audible And Visible Signals (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Glass Compositions (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

Un émetteur de signaux optiques de détresse possède plusieurs diodes électro-luminescentes (14) sur un socle à diodes en forme de dôme (18) dont la surface (19) est revêtue d'un matériau rétro-réfléchissant, les diodes électro-luminescentes (14) faisant saillie sur cette surface et étant agencées de sorte qu'au moins deux d'entre elles sont visibles lorsque l'émetteur de signaux de détresse est regardé de côté ou depuis un point plus élevé par rapport au plan de base du socle portant les diodes électro-luminescentes.
EP82901545A 1982-04-26 1982-04-26 Emetteur de signaux optiques de detresse Withdrawn EP0107649A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1982/000135 WO1983003915A1 (fr) 1982-04-26 1982-04-26 Emetteur de signaux optiques de detresse

Publications (1)

Publication Number Publication Date
EP0107649A1 true EP0107649A1 (fr) 1984-05-09

Family

ID=20345694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901545A Withdrawn EP0107649A1 (fr) 1982-04-26 1982-04-26 Emetteur de signaux optiques de detresse

Country Status (4)

Country Link
EP (1) EP0107649A1 (fr)
DK (1) DK596283A (fr)
NO (1) NO156148C (fr)
WO (1) WO1983003915A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172724B (en) * 1985-02-14 1989-06-14 Charles Jack Lewis Location device
US20070008712A1 (en) * 2005-07-07 2007-01-11 Schnitzer Kevin D Water-activated and light-assisted visual locating device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2330096A (en) * 1940-06-05 1943-09-21 Max D Farmer Marker for aircraft landing stations
GB1006142A (en) * 1963-04-13 1965-09-29 Masao Horino Distress signal device
US3684348A (en) * 1970-09-29 1972-08-15 Rowland Dev Corp Retroreflective material
US4231079A (en) * 1979-03-28 1980-10-28 Heminover Stephen R Article of wearing apparel
SE424234B (sv) * 1980-10-27 1982-07-05 Owe Rene Forsberg Optisk nodsignalsendare

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8303915A1 *

Also Published As

Publication number Publication date
NO156148C (no) 1987-08-05
DK596283D0 (da) 1983-12-23
DK596283A (da) 1983-12-23
WO1983003915A1 (fr) 1983-11-10
NO834825L (no) 1983-12-27
NO156148B (no) 1987-04-21

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Legal Events

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