Патент USA US2404266код для вставки
Ju?y 1, 1946- M. H‘. LbUGI-LNAN E 2,404,265. MINE DETECTION DEVICE Filed June 18, 1943 2 Sheéts-Sheet 1 (at 2/ 2a \ 1 113F320 ‘11m - f 23 BY ATTOHVE'Y. July 16, 194-. M. H. LOUGHNANE - 2,404,2?6 MINE DETECTION DEVICE Filed June 18‘, 1943 2 She‘e ‘cs-Sheet 2 ISTRIEUTIJR I'EIEI MA A Patented July 16, 1946 Y» i ' ‘2,404,266 UNITED STATES PATENT OFFICE’, Michael Henry Loughnane, Little Falls, N. J. Application June 18, 1943, Serial No. 491,338 4 Claims. 1 (Cl. 177-311) 2 . This invention relates to improvements in mine of this speci?cation, and in which like numerals detection devices and speci?cally it relates to a are employed to designate like parts throughout system employing a plurality of propelled and controlled torpedo-like detection vessels oper Figure l is a plan view showing a schematic ated in front of the ship to be protected and arrangement of a detection device embodying an electrical detection circuit comprised in the my invention, control cables of said detection vessels whereby Figure 2* is a sectional elevation of one of the approaching mines are automatically indicated torpedo-shaped “feelers,” and, . on the ship to be protected. Figure 3 is aschematic diagram of the detec The protection of ships against mines is a 10 tion and indicating circuit. problem which is of great importance and which In the drawings, wherein for the purpose of ’ has puzzled naval designers for many years. illustration is shown a simpli?ed and preferred Various forms of protection has been devised such arrangement of my invention, the numeral ‘5 as “blisters” and nets, etc., but most of these designates the ship to be protected. On the for devices were extremely cumbersome and were not ward part of the ship 5 are placed reels 6 and ‘I effective when the ship was under speed. My from which cables 8 and 9 extend forward to present invention solves this problem in a new the torpedo-shaped detectors or “feelers’g’ I0 and and unique manner without any cumbersome I I. A cable I2 is connected withone end through armor or other hindrances to the operation of the insulated lead-in I3 to the feeler Ill and with the ship at full speed. By means of adetection 20 the other end to insulator I4. Another cable I5 apparatus comprising a plurality of torpedo is connected through the insulated lead-in I6 ‘to shaped “feelers” which are electrically driven the port feeler II and with its other end to in from the mother vessel, and which may be con sulator I4. A mine ?eld comprising mines I'I, trolled from same and operated far in advance I8, I9, 20 and 2| is indicated in dotted. lines, same, . . of same, I am able to detect and automatically 25 see Fig. 1. ' _ indicate the position of mines in time to either The torpedo-shaped feelers I0 and II are ‘con reverse the engines and stop the ship or to change structed as indicated in the sectional elevation. the course and get out of the way. This device shown in.Fig. 2. The torpedo-shaped body I0. may also be operated as an advance “feeler” by has a propeller 22 at its forward end. A protec submarines or mine sweepers seeking a channel 30 tive frame 23 prevents damage to the propeller through enemy mine ?elds. It is believed that from driftwood or other objects. The propeller this device will be of great value on the protec 22 is driven by the electric motor 24 through the tion of both naval and merchant shipping. gear reduction 25. At its rear end the torpedo An important object of this invention is to provide a simple and easily operated detection device which will give automatic indication when a vessel is approaching a mine. shaped body I0 carries horizontal and vertical 35 rudders 26 and 21 which are operable by means of the electricmotors 28 and 29,}respective‘ly, . through the gear reductions 3B and 3i. The tow Another object of this invention is to provide cable 8 carries several insulated'conductors which a detection system for mines which may be oper provide power and control to the various mo ated sui?ciently far ahead of a moving vessel to 40 tors as well as carry the’detection current. "The either reverse the engines and stop same or‘ to cable "8'is preferably brought to a distribution‘ change the course and get out of the way. box 32 from which separate connections are Still another object of my invention is to‘ pro brought to the motors and to the insulated lead vide an automatic, electrically operated detection ins I3’and I6. system which will indicate when a vessel is ap 45 -The'detection circuit as illustrated in Fig. 3 proaching a mine as well as the approximate consists of the two bare cables I2 and I5 which direction and location of the mine. are insulated from one another by means of in A further object of this invention is to provide ' sulator, I4, see Fig. l. These cables I I2 and I5 a mine detection system which permits operation are connected through insulated leads carried, and automatic indication while the vessel is un 50 in the two tow cables 8 and 9 to the variable der full speed. ' resistor 33 from which leads 34 and 35 connect Other objects and advantages of my invention to transformer 36 which again feeds into the will be apparent during the course of the follow two‘grids of tube 31. The sliding member. of the ing description. ‘ In the accompanying drawings forming a part variable resistor 33 is connected through lead 38 f‘ 55: to one terminal of coil 3920f the powerv trans 2,404,266 3 63 thus not necessary for the mine to touch the cables l2 or 15 and it is obvious that the indica tion given will be proportional in strength to the former 40 while the other terminal of coil 39 is connected to ground through lead 4!. The center tap of transformer 36 is connected to the distance between the mine and the cable. slider of a variable resistor 42 by means of lead Thus it is also possible to obtain an indication of the distance away from the mine as well as whether it is approaching the starboard or the port cable. In this manner a quick and reliable indication is 43. The remainder of the circuit consists mainly of the amplifying tube 44 which has two plates and two grids and which is connected so as to amplify the impulses coming from tube 31, and the two relays 45 and 55. Through leads 4?, 48 obtained and it is possible to either stear away and 49 the'relays 45 and 46 may be used to con 10 or‘ to reverse the‘ engines 1and stop ‘the ship in time before hitting the mine. trol automatic signalling means such as visible indicators or even to control rudder or engine room signals. The lead 41 is common while 48 indicates port and 49 starboard. The power transformer 40 furnishes the necessary operating voltages and is connected to a suitable source at ' It is to be understood that the form of my in vention, herewith shown and described, is to be taken as a preferred example only, and that vari ous changes? in the shape, size and arrangement , of parts may be resorted to, without departing from the spirit of my invention or the scope of the subjoined claims. Having thus described my invention, I claim: 1. A mine detection device for ships comprising 20 a plurality of feelers, said feelers being electrically driven and controlled and operated ahead of the terminals 50 and 5|. The tube 44 is preferably of a type known to the art by the trade-name Thyratron. It is to be noted, however, that other tubes and other circuits may be used to obtain the same result without departing from the ob ject and nature of my invention. ship to be protected; electrically operated rudder The operation of my invention is as follows: means controlling said feelers; insulated,.multi As mentioned supra the motor-driven, torpedo shaped feelers are powered by electric motors and 25 conductor cables connecting said feelers to said ship; a pair of bare cables, mechanically con controlled from the ship to be protected. These nected together but insulated from each other 'at feelers I0 and I! are sent out ahead of the ship their connected ends as well as from the body of 5 and operated at a suitable distance away from said feelers, said bare cablestying said feelers same. The electric motors 24 furnish an excess of power thus giving the feelers a greater speed 30 together mechanically, and automatic detection means comprising a balanced bridge circuit, of than the ship 5. In this manner the tow lines which said bare cables form one half, whereby-the’ 8 and 9 will be held taut as will the cables I 2 and proximity of mines or other metallic objects may [5 due to the fact that the rudders 26 are set so be indicated. ,7 as to give the feelers I0 and I I a slight angle out 2. A mine detection device for ships, compris ward from the ship 5. Due to the fact that feelers 35 ing a plurality of electrically driven, torpedo l0 and ll have a higher speed than the ship 5 it is also possible to make turns at full speed by properly controlling said feelers and by pulling in on one or the other of the cables 8 and 9 if necessary. The feelers are designed to have suffi cient buoyancy to ?oat and to carry the cables 8, 9, I2 and I5 and their elevation may further shaped feelers operated at a considerable distance‘, ahead of the ship to be protected; electrically operated rudder means whereby said feelers may be controlled from the ship; insulated,imulti conductor cables connecting said feelers to said ship; a pair of bare cables forming a tie between said feelers, said bare cables being insulated from more be controlled by means of rudders 21. The one another as Well as from the bodies of .said electric motors 24, 28 and 29 are preferably ar 45 feelers; a Wheatstone bridge circuit including ranged so as to minmize any gyroscopic action. said bare cables and said insulated cables} avari The bare cables 12 and 15 form one half of a able resistor forming two legs of said bridge. cir Wheatstone bridge, as shown in Fig. 3, with the cuit; a polarized amplifying circuit connected to variable resistor 33 forming the other half. A said bridge circuit, and indicating means ‘oper voltage is applied to this bridge circuit from coil 39 through leads 38 and 4|, the current traveling 50 ated by said amplifying circuit whereby the‘ proximity of a mine ‘may be indicated... ~ through the salt water and through the body of 3. A mine detection devicefor ‘ships compris the feelers l0 and H. Normal zeroindication is ing a plurality of feelers, said feelers .being elec set by adjusting the variable resistor 33. The trically driven and controlled and‘operated ahead cables l2 and 15 are bare and in contact with the salt water, but are insulated from the bodies of 55 of the ship to be protected; ‘electrically operated rudder means whereby said feelers may be'con feelerslil and I l by means of the lead-ins l3 and 16. Being of equal length the resistance of cables l2 and [5 to ground will also be equal. It is there fore only necessary to adjust resistor 33 to obtain perfect balance in the bridge circuit. 'I’his'bal ance is furthermore adjusted to match tube 3'! trolled from the ship; insulated multi-conductor cables connecting said feelers to said ship; ‘alpair of .bare cables forming'a tie'between 'said‘fe‘elers,‘ said bare cables being insulated from one another at their common ends as well as fromthe bodies of said feelers, said. bar’e‘cabl'es' being connected through insulated lead-ins to said insulated multi conductor cables; .a potentiometer ‘connected, across said ‘insulated cables, said bare cables, in‘ sulated cables and potentiometers forming ‘a immediately result in the upsetting of this bal bridge circuit; a sensitive detection circ'iiitéo'n ance and a voltage will be induced in transformer nected across said potentiometer, and remote con 35. If, therefore, a mine or any other metallic trol means operated ‘by said sensitive detection object comes into the vicinity of one of the cables l2 or I?) the balance will be upset and being po 70 circuit whereby the proximity of ‘amine maybe larized the induced voltage in transformer 36 will 4. A detector device comprising a plurality. of. act on either one or the other of the grids of by means of resistor 42. With the bridge on bal ance no voltage will flow in the secondary of transformer 36. Any small change in the con tact areas of the cables l2 and [5, however, will, 65 detected. ' ‘ ' ' ' electrically driven torpedo ‘shaped feelers oper ated at a considerable distance ahead of the ship other of the plates of the ‘Thyratron 44, thereby operating either one of the relays 45 or 46. It is 76 to be protected; electrically operated ‘rudder tube 37 and accordingly operate either one or the 5 2,404,286 means whereby said feelers may be controlled from the ship; and insulated multi-conductor cable connecting each of said feelers to said ship; a pair of bare cables forming a tie between said feelers; said bare cables being tied together through an insulator at their common end and connected to a separate lead in said insulated cables through an insulated lead-in in said feelers; a potentiometer connected across said leads of 6 pli?er tube, a potentiometer connected across the two plates of said dual detector tube, a dual Thyratron tube connected across said potentiom eter, a pair of relays connected in such a manner that one is in series with the cathode of one side of said Thyratron while one is in series with the plate of the other side of said Thyratroma power transformer energizing said tubes, said power transformer having a separate winding energizing said insulated cables, said potentiometer forming 10 said bridge circuit through said potentiometer, the two arms of a bridge circuit, while the two and remote control means operated by said relays other arms are being formed by said bare cables; a sensitive detection circuit connected across said potentiometer and comprising an input trans former connected into a dual detector and am- 15 whereby the proximity of a conducting object may be detected. MICHAEL HENRY LQUGI-INANE.