FI71636B - UTVIKBAR BAOTTAECKNING MED PEJLINGSANORDNING - Google Patents

Description

71 636 APPLICABLE BOAT COVER WITH PASSIVE DIRECTIONAL DEVICE Technical field

The invention relates to a spreadable boat cover, preferably as an integral part of an inflatable liferaft having means for reflecting radar beams consisting of at least one collapsible locating reflector, which together with the roof surface rises vertically

State of the art

An inflatable life-raft with means for reflecting radar beams is previously known (DE-AS 11 19 707).

On this life-raft there is a passive directional track on an approximately hemispherical roof surface, which is a collapsible so-called triangular mirror, the outer edges of which are formed by air tubes which, together with the float and tukl tubes, fill in the blowing and thus open and form a radar reflector. Apart from the possibility that the 1. supportable air tubes holding the reflectors of the triangular mirror may be damaged, causing the reflector to collapse, this design has the disadvantage that the air tube roof structure on the roof of the life raft is heavily loaded at the top and adversely affects the life rafts.

An important problem in a passive directional device with reflective surfaces of a material to be bent, in particular a textile, is also to achieve the geometry of the reflector as described above in the raised state, i. REFLECTOR SURFACES MUST BE UNCLICKED AND PERPUTIC TO EACH OTHER.

This is more difficult to achieve the more precisely the helium surfaces have been cut to join them from their outer edges to other components. Thus, surfaces according to the prior art of the type described above must be, for example, in the shape of a circular sector in order for the crown-like tubular structure to support and support them. This has been avoided in a known weather balloon with a collapsible radar reflector (brochure Chemring Limited, Portsmouth, England), where the radar reflector surfaces consist of a metallized synthetic fiber mesh attached to a rigid light metal tubular frame such as a kite. The tube frame can be disassembled for transport. After assembly, the geometry of the reflector as described above is maintained by tensioned steel wires. This reflector design is not suitable for lifeboats.

DESCRIPTION OF THE INVENTION From the prior art described, it is an object of the invention to provide a spreadable boat cover as initially described with means for reflecting radar beams without gas-filled, perishable components, reducing peak loading, providing low wind resistance and avoiding undesirable sailing characteristics. reliable in terms of manufacturing costs.

The solution according to the invention of the present invention will become apparent from the description of the preferred embodiment and development contained in the following claims.

The embodiment according to the invention substantially improves such roof surfaces according to the task. On the one hand, a directional device can be easily and tightly connected to the ceiling surface, on the other hand, it is guaranteed that a geometrically perfect reflector is available after folding. At the same time, the reflector is particularly light in weight and can be fixedly mounted on conventional lightweight roof surfaces in known ambulances. No measures are required to support the reflector, except for conventional support tubes for the boat cover. Manual 3 71636 retrofitting can also be easily performed.

Brief explanation of the figures

The drawings show an embodiment of the invention, which will be explained as follows with reference to the figures

Fig. 1 is a simplified view of a boat cover with a radar reflector in a perpendicular section along the line A-A in Fig. 2;

Figure 2 shows an applied boat cover with a radar reflector seen from above.

Implementation of the invention

The boat cover 10 preferably comprises, in the open state, an approximately hemispherical roof in an inflatable liferaft provided with roof support tubes not shown in conventional drawings. However, it can also be a partially open canopy of a rigid lifeboat or the roof of a sports boat held in an open form by arches.

Above the roof surface 10 there is a radar reflector 11 having a triangular mirror shape and having four horizontal reflector plates 12 and eight vertical reflector plates 13 attached. · In this case, each reflector plate 12, 13 has a rectangular triangular shape tB so that the base of the plate 12 2). The diagonals of this square have triangular reflector plates 13 which, by means of their edges facing the center, form a fastening channel 24, which is a cavity formed, for example, by joining the edge strips. At the lower end of the mounting channel 24 in the middle of the square there is a center point 14 where all the reflector plates 12, 13 meet. At the four corners of the square, four bars 15 are placed in the center 14, which are made of flexible plastic and terminate ___ - ΤΓ - 4 71636 relatively close to the center 14 · At an equal distance from the center 14 in the mounting channel 24 an additional rod 16 extends from the top of the reflector plates 13. The rods 15, 16 together with the reflector plates 12, 13 form a rain-shadow-opening device, in which the rods take care of the tightening and shape necessary to maintain the open space of the device.

The connecting rods 15, 16 to the reflector 11 take place by a rim consisting of two textile discs 17, 18 and one housing 19. that a pocket 20 is formed on each rod 15. Since the discs 17, 18 have a diameter corresponding to about half the side length of the square formed by the reflector plates 12, the pockets extend less than half the length of the rods 15; at the outer ends the bars extend into pockets 25 located below the plates 12 at the corners of the square. The upwardly extending rod 16 extends at the lower end to the housing 19, which in turn is arranged below the channel 24 ·

Here, the attachment of the reflector 11 to the ceiling surface 10 takes place in a simple manner by means of an adhesive 21 which is below the edge disc 18 and above the ceiling surface 10 between them. The fastening can also take place, for example, with detachable pushbuttons. In addition, the four corners of the square formed by the reflector plates 12 are connected by rubber cords 22 to the ceiling surface 10, the latter being provided with gripping points 23. The rubber cords 22 are so long that the base with the rods 15 formed by the reflector plates 12 remains flush.

With the system made with respect to the center 14 of the rods 15, 16, the roof 10 with its reflector 11 can of course be tightly folded to size according to a certain formula and packed in a storage bag or container. When opened - it happens automatically as in most inflatable rescue vehicles or by hand as in lifeboats and pleasure boats - the reflector 11 opens like an umbrella and stays firmly in the roof dome. Movement of the boat due to wind or waves will not damage the light reflector in use.

The movable connection of the rods 15 near the center 14 of the reflector can also be realized unlike textile edge discs 17, 18, for example with a fixing disc in a fixed center (not shown), to which the inwardly facing ends of the rods 15 are movably attached.

To increase the effectiveness of the reflection, the boat cover 10 can be provided with two reflectors 11, which are arranged side by side and whose reflector plates 12 form an angle of about 45 degrees with the water surface so that locating impulses traveling parallel to the water surface meet three sides of the triangular mirror.

Professional usability

Boat covers made in accordance with the invention make it essentially easier and quicker to find rescue equipment provided in these emergencies after landing by search vessels or aircraft, thus greatly increasing the chances of survival of passengers in rescue equipment in distress at sea. In addition, it has the advantage that the directional device according to the invention does not impair the stability of the fall and undesired sailing means of the rescue device can be avoided.

The features of the claimed invention set forth in the specification, drawings and claims may be

Claims (14)

A spreadable boat cover, preferably as an integral part of an inflatable liferaft, having means for reflecting radar beams consisting of at least one collapsible positioning reflector which, together with the roof surface, rises when opened and in a raised state preferably forms two mutually perpendicular opposing reflectors perpendicular to the reflector surface, characterized in that rod-shaped clamping and shaped holders (15, 16) are arranged along the interconnected edges of the reflected surfaces (12, 13) in a manner known per se, which at the center (14) of the reflector spread like an umbrella branch so that the reflector (11) spreads and rises when the cover opens. Boat cover according to Claim 1, characterized in that the rod-like clamping and shaped holders (15, 16) are indirectly connected to one another at the same time as the ends facing the center point (14) are fastened by means of a common flange (17, 18, 19). Boat cover according to Claim 2, characterized in that the rim has pockets (19, 20) in which the ends of the clamping and form holders (15, 16) are placed. Boat cover according to Claims 2 and 3, characterized in that the rim consists of two disc-shaped elements (17, 18) which are in each case arranged above and below the clamping and form holders (15, 16) and which are connected to each other by gluing, sewing or by welding, which surrounds and secures the clamping and form holders (15, 16). Boat cover according to Claim 4, characterized in that the center of the upper edge disc (17) has a housing-like edge part (19) for receiving the corresponding end of the vertical clamping and shaping holder (16). Boat cover according to Claims 1 to 5, characterized in that the outwardly facing ends of the clamping and form holders (15) are located in pockets (25) which are located below the corners of the reflective surfaces. i 6,71636 essential, either alone or as desired, combined for the practice of the invention in its many embodiments. Boat cover according to Claims 2 to 5, characterized in that the edge parts (17, 18, 19) are made of textile material. Boat cover according to Claim 7, characterized in that the edge parts (17, 18) are of the same textile material as the reflective surfaces (12, 13) of the positioning reflector (11). Boat cover according to Claim 4, characterized in that the edging disc (18) located below the clamping and form holders (15) is fastened to the roof surface (10) by gluing, sewing, welding or via pushbuttons. Boat cover according to Claim 1, characterized in that the outer ends of the horizontal clamping and form holders (15) are indirectly connected to corresponding points on the upper surface of the roof surface (10), preferably by means of flexible traction fasteners (22). Boat cover according to Claim 10, characterized in that the towing brackets (22) are rubber cords. t 8 71636 Boat cover according to Claim 1, characterized in that the vertical reflector surfaces (13), by means of their edges facing the center, form a fastening channel (24) for the vertical clamping and shaped holder (16) at the lower end of which the housing-like edge part (19) engages. Boat cover according to Claim 1, characterized in that two locating timers of the type described are attached to the roof surface. Boat cover according to Claim 13, characterized in that the two positioning reflectors attached to the roof surface preferably form an angle of 45 degrees with respect to the horizontal. ti 9 71636