US818479A - Device for searching submarine mines, &c. - Google Patents

Description

PATENTED APR. 24, 1906. U. S. SJUSTRAND.

DEVICE FOR SEARCHING SUBMARINE MINES, 8m

APPLIOATION FILED SEPT. 28, 1906.

lmwentar said buoys, and

strike the mines or the like.

3 mm orrioni,

ULRIK sEvERiN sJosT'RAND, or SUND'BYBERG, SWEDEN.

DEVICED' FOR SEARCHING SUBMARIl\IE MINES, ac.

Specification of Letters Patent;

Patented April 24, 1906.

Application filed September 28,1905. Serial No; 280.467.

To all whom it may concern/.-

Be it known that I, ULRIK SEVERIN SJos- TRAND, a subject of the King of Sweden and Norway, and a resident of Sundbyberg, Sweden, have invented a new and useful Improvement in Devices for Searching Submarine Mines and the Like, of which the following is aspecification, reference being had to the drawings accompanying and forming apart hereof.

This invention relates to an improved deyipe for searching submarine mines and the 1 e. The object of the invention is to rovide a device of the said kind which will be simple in construction and reliable in function.

The invention consists, chiefly, in the combination of buoys, steering means on said buoys adapted to keep the same at a distance from each other the water, water-kites suspended from the one or more catchcords or the like between the said kites adapted .to The buoys are by means of tow-lines connected to a boat or vessel and the said tow-lines maybe connected to a winding device or the like placed in the boat or vessel and suitably provided with an automatically-working stopping devi e of any suitable construction adapted tore ease the winding-mechanism when the stretching in the tow-lines after the cord or cords connecting together the kites is suddenly increased, so that the tow-lines can be wound off until the vessel can be stopped.

In the accompanying drawings I have shown an embodiment of my invention. Figure 1 shows a perspective view of my improved device, and Fig. 2 shows a top view ofthe same. i i

Referring to the drawings, a winding de-- vice 2 'is placed in the stern of the vessel 1,

and to the sameare connected two tow-lines 3, each attached to one of the buoys 4. The latter are provided with keels5 or other steering devices, on account whereof the buoys tend to move away frpm each other. .In using keels such movement may most suit.- ably be reflected by connecting the tow-lines, by means of rings 6 or the like, for instance, to three cords or the like, of which one, 7, is attached at or near the-lower edge of keel 5, while the two others, 8 and 9, are each attached at or near one. of the ends of the keel, the length of the said cords being so chosen that the attaching-point of the tow-line is at the the water.

during the motion through side of the keel and somewhat in front of its middle, so that the keel while moving through the water will place itself obliquely in relation to the direction of movement. Since the attaching-points of the tow-lines'are located on the sid es of keels facing each other, the buoys will obviously tend to move away from each other when being drawn through From the keels 5. of the buoys are, by means of cords 10 or the like, suspended water-kites 11 of any well-known or suitable construction, which are capable 0 keeping themselves at'a constant depth independently of the speed at which they move through the water. Somewhat above the kites are provided edgewise-arranged plates 12, which are pivotally attached to the cords 10 and are connected to each other by means of one or more cords 13 or the like adapted to strike eventualt mines. Since the ends of the cord or cords 13 are attached to the said plates 12 at some distance from the axis of rotation of the plates 12, the latter will place themselves obliquely in relation to the direction of movement, and therefore tend to move away from each other, thereby keeping the cord or cords 13 stretched. Though the provision of the said plates 12 is quite important in the present invention,.inasmuch as the kites, which offer little resistance againstlaterally-working strains, will be fully freed from such strains, said plates are not necessary.

The device described above works as follows: When the buoys and their kites have been dropped down from the vessel and the tow-lines wound off to the desired length, buoys and kites will place themselves approximately in the manner shown in the drawings, whereby the catching-cord 13 will be stretched in a certain degree and move at a constant depth, 'at'which it will be kept by the kites. When the catchin -cord 13 strikes a submarine mine or the like, the stress in the tow lines will be increased very essentially, and such increasement of the stress may be used to release a stopping device of any suitable at will. Eventually the buoys and the kites may be arranged in groups aftereach other,

in which case the cords connecting together the kites may be arranged to move at different levels in the several groups.

The kind of Water-kiteswhich I prefer to use in carrying'out the present invention is that described in my United States Patent No. 717,129, dated December 30, 1902, because I do not know of any ot er kind of kites that are capable of moving at constant depths.

Having now described my invention, what I claim as. new, and desire to seeure'by Letters Patent, is

1 In a device for searching submarine mines and the like the combination of buoys, steering means on said buoys adapted to keep the same at a distance'from each other during the motion through the water, waterkites suspended from the said buoys, and a.

catch-cord -between\t he said kites, substantially as and for the purpose set forth.

minesand the like the combination, of buoys,

the same at a distance from each other during the motion through the water, waterkites, suspension cords between the said buoys and kites, swingable plates on said suspension-cords, and a catch-cord between the said swingable plates, substantially as'and for the purpose set forth. In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses. I

ULRIK SEVERIN SJOSTRAND.

Witnesses:

EVALD DELMAR, KARL RUNESKOG.

steering means on said buoys adapted to keep 1 2. In a device for searching submarine

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