GB579231A - An improved submersible electro-magnet - Google Patents

An improved submersible electro-magnet

Info

Publication number
GB579231A
GB579231A GB118140A GB118140A GB579231A GB 579231 A GB579231 A GB 579231A GB 118140 A GB118140 A GB 118140A GB 118140 A GB118140 A GB 118140A GB 579231 A GB579231 A GB 579231A
Authority
GB
United Kingdom
Prior art keywords
vessel
coil
sea
bed
thornycroft
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
GB118140A
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.)
English Electric Co Ltd
John I Thornycroft and Co Ltd
Original Assignee
English Electric Co Ltd
John I Thornycroft and Co Ltd
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 English Electric Co Ltd, John I Thornycroft and Co Ltd filed Critical English Electric Co Ltd
Priority to GB118140A priority Critical patent/GB579231A/en
Publication of GB579231A publication Critical patent/GB579231A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines
    • B63G7/06—Mine-sweeping means, Means for destroying mines of electromagnetic type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

579,231. Firing magnetic mines. THORNYCROFT, SIR J. E., THORNYCROFT & CO., Ltd., J. I., ENGLISH ELECTRIC CO., Ltd., and CALVERLEY, J. E. Jan. 19,1940, No. 1181. [Class 9 (ii)] A submersible electromagnet for use in exploding magnetic mines comprises a torpedo-shaped vessel, a magnetic core which does not form a closed circuit, a magnetizing coil, means for energizing the coil, and means for keeping the device submerged at a predetermined distance above the sea-bed. The vessel 1 is provided with a towing device 16, and a screw 11 at its rear which operates on being dragged through the water to drive an electro-generator 6, which is positioned inside the vessel within the hooded end 5 of an open magnetic core 2 adapted to be energized by a surrounding coil 3. The current may be simply direct current or a combination of direct and alternating current to vary the strength of the field. The coil is enclosed by a casing 19 open at both ends and the hood 5 is provided with apertures 5a through which cooling air is circulated by a fan 6a on the screw shaft 8. The vessel is provided either with resiliently mounted wheels 22 at its front and a carriage spring 29 at its rear, which contact with the bed of the sea when it is required to drag the device thereon, or with a length of chain which is raised by the natural buoyancy of the device until a predetermined level above the sea bed is attained. The device may be charged with air at a greater pressure than the pressure due to submergence in order to prevent inward leakage of water through the shaft bearings. Vanes 14 are provided at the stern to cause submergence when the device is being towed by overcoming the natural buoyancy of the device.
GB118140A 1940-01-19 1940-01-19 An improved submersible electro-magnet Expired GB579231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB118140A GB579231A (en) 1940-01-19 1940-01-19 An improved submersible electro-magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB118140A GB579231A (en) 1940-01-19 1940-01-19 An improved submersible electro-magnet

Publications (1)

Publication Number Publication Date
GB579231A true GB579231A (en) 1946-07-29

Family

ID=9717556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB118140A Expired GB579231A (en) 1940-01-19 1940-01-19 An improved submersible electro-magnet

Country Status (1)

Country Link
GB (1) GB579231A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977798C (en) * 1962-05-19 1970-07-09 Bundesrep Deutschland Towable clearing device for clearing magnetically and / or acoustically closed sea mines
EP1572531A1 (en) * 2002-12-18 2005-09-14 Commonwealth Of Australia Minesweeping device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977798C (en) * 1962-05-19 1970-07-09 Bundesrep Deutschland Towable clearing device for clearing magnetically and / or acoustically closed sea mines
EP1572531A1 (en) * 2002-12-18 2005-09-14 Commonwealth Of Australia Minesweeping device
EP1572531A4 (en) * 2002-12-18 2011-06-22 Commw Of Australia Minesweeping device
US8006620B2 (en) 2002-12-18 2011-08-30 The Commonwealth Of Australia Minesweeping device

Similar Documents

Publication Publication Date Title
US2127847A (en) Nautical instrument
US6213021B1 (en) Electromagnetic sea mine detonation system
US3826215A (en) Magnetic mine detonator system
GB579231A (en) An improved submersible electro-magnet
US3120073A (en) Fish lure
ES448566A1 (en) Apparatus for mounting and dismounting a submerged propeller unit for a floating body
US2164340A (en) Target
US2938483A (en) Acoustic decoy
JPS55144216A (en) Electromagnetically driven slit exposure shutter
US2397678A (en) Torpedo exploding mechanism
US2270694A (en) Mine-sweeping apparatus
GB579728A (en) Improvements in and connected with electrically propelled torpedoes
GB1204640A (en) Improvements in the design and utilisation of submarines particularly for cargo carrying and fishing
SE9002760D0 (en) WEAPONS
CN112379072B (en) Water quality detection device and detection method thereof
US2268155A (en) Boat construction
GB181297A (en) Improvements in or relating to apparatus for use in connection with the raising, repair or other manipulations of vessels especially when submerged or sunk
ES363054A1 (en) Tail-shaft bearing assembly
SU1186549A1 (en) Arrangement for collecting petroleum from water surface
GB2022239A (en) Heating of diving suits
GB532007A (en) Improved means for supplying air to submerged submarines
GB140842A (en) Improvements in salvage
CN205210305U (en) Side scan sonar device
GB906705A (en) Exercise torpedo
GB150429A (en) Improvements in auxiliary propelling devices for towing and manoeuvring vessels and other floating bodies