US3776165A - Device for cutting steel ropes, hawsers, chains, cables and the like under the water surface - Google Patents

Device for cutting steel ropes, hawsers, chains, cables and the like under the water surface Download PDF

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Publication number
US3776165A
US3776165A US00190923A US3776165DA US3776165A US 3776165 A US3776165 A US 3776165A US 00190923 A US00190923 A US 00190923A US 3776165D A US3776165D A US 3776165DA US 3776165 A US3776165 A US 3776165A
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US
United States
Prior art keywords
movement
arm
charge
igniting
control plate
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 - Lifetime
Application number
US00190923A
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English (en)
Inventor
U Sabranski
T Weber
W Werner
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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Filing date
Publication date
Priority claimed from DE19702055843 external-priority patent/DE2055843C3/de
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3776165A publication Critical patent/US3776165A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
    • B23D15/145—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure actuated by explosion
    • 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

Definitions

  • ABSTRACT Apparatus adapted for movement underwater to partially surround and cut underwater anchoring means such as steel ropes, hawsers, chains, cables and the like including a housing carrying an explosive cutting charge and having an arm pivotally mounted in the housing and extending therefrom. The arm is biased for movement to an open position and carriescharge igniting means responsive to contact by the anchoring means to be cut in the open position of the arm for detonating the charge and severing the anchoring means.
  • the charge igniting means is provided with several safety devices including a shear pin which is ruptured by contact with the anchoring means and a piston chamber which must be filled with water to enable detonation of the charge, thereby requiring the apparatus to be submerged.
  • the arm may also be restrained from assuming the open position by a wire connecting the arm and the housing which is broken by contact with the anchoring means to be cut.
  • apparatus is adapted to be disposed of after a single use.
  • This invention relates to a device forcutting steel ropes, haws'ers, chains, cables and the like under the surface of the'water; comprisinga capture and cuttings device arranged for movement towards the object to be cut to partially surround it, so that thetcuttingineans is-- actuated by theobject to be cut.-
  • the present invention overcomes" the aforementioned disadvantages by ;providing a-cutting device-for I underwater steel ropes, hawsers, chains, cables *andthe like having an improved cutting efficiency and a'simple construction.
  • the cutting device is preferably formed of such materials that the cuttingzdeviceis economi cally disposable after a single use and is 'not'dependant vi upon" additional buoyancy elements for floating through the'water.
  • the pivotablearm is constructed as an" angle lever havinga control plate' such that in an open position, the-arm can beoperated by, the object to be cut so that a laterally projecting retaining ring'on the-control plate brings about the release of a springloaded'piston.
  • the working stroke ofthe piston is transmitted via a water column in the pistonchamber to a push rod'which' movesa-rockerarm mounted on a pivotablearmand carrying anignition' pin for igniting afi'ri-ng detonator associated with "the cutting charge.
  • the present' invention provides several safety devices for the cutting apparatus including a shear pin connectin g'the control plate to the pivotable arm which must Y be-ruptured before the firing pincan ignite the cutting charge.
  • the operation of the ignition device is only possible under water in that the actuating means forthe firingpin'includes a water column with'an entry slot and asmalllatera'l outlet bore interposed between mechanical actuating means for the firing pin.
  • the cutting charge carrier is provided gs withastabilizer and aceramic plate is located between the cutting charge and tow rope to protect the tow rope from damage by detonation of the charge.
  • both'thehousing of-thecutting charge carrier and the arm areconstructed essentially of plastic material to" "provide an extremely'lightweight cutting device capableof floating without additional buoyancy members.
  • FlGs2- is a longitudinalsection through the cutting device'of FIG. 1 with the pivotable-arm in closed position;
  • FIG 1 is a perspective viewof a capture and cutting- FIG. 4 is the same cutaway view. as in FIG. 3 showing a firing detonator pierced by the firing pin.
  • FIG. 1 there is shown a cutting charge carrier housing 1 preferably formed of a plastic material and receiving a cutting charge 2 having a hollow charge effect, a connecting means 4 for a tow rope 5 located at the transition point of the housing and a stabilizer 3.
  • a ceramic plate 6 is embedded in the housing between the tow rope 5 and the cutting charge 2 which is provided with a conventional metal lining to improved the charge cutting efficiency.
  • a firing detonator 7 is in contact with the cutting charge 2 and serves initially for firing the charge.
  • the housing 1 is provided with an aperture 8 adjacent to the cutting charge 2 and extending to the upper edge of the housing 1 and a pivotable arm 9 preferably formed of a plastic material and having a configuration of an angle lever is arranged within the aperture for pivoting about a pivot 24.
  • a spring 11 wound around a spring shaft biases the arm 9 into the open position.
  • a retaining wire 12 connects the cutting charge carrier housing 1 and the arm 9 for preventing the arm from assuming the open position.
  • the retaining wire 12 is adapted to be destroyed by the object 27 to be cut, or the wire may be removed by hand.
  • the cutting charge carrier 1 and the arm 9 are both provided with guiding surface configurations which aid the capture of the object to be cut.
  • the short end of the angle lever forming the arm is disposed in the aperture 8 and a control plate 13 secured in the arm by a shear pin 9a is disposed deep in the cavity of the cutting charge 2.
  • the control plate includes a projecting retaining ring 15 and the plate is pivoted on the arm 9 by a pivot 14.
  • the shear pin serves as a safety device for preventing improper charge detonation by preventing pivoting of the control plate until sufficient pressure is exerted on the control plate to rupture the pin.
  • a collar 16 of a piston 17 is biased into abutment against the retaining ring 15 by a compression spring 18 which actuates the piston with the portion of the piston above the collar 16 being guided in a piston chamber 19.
  • the piston chamber is provided with a lateral slot 20 as an inlet and a small lateral bore 21 as an outlet.
  • a push-rod 22 is movably mounted in the arm 9 for striking the side edge of a rocker arm 23 mounted on the pivot 24.
  • a leaf spring 26 supported on the rocker arm 23 and the inner wall of the arm 9 constantly biases the rocker arm 23 against the push rod 22 and an ignition pin 25 projects downwardly from the opposite end of the rocker arm 23.
  • a plurality of the cutting devices are connected to the tow rope of a mine sweeper at a predetermined spacing.
  • the free end of the two rope 5 is provided with a float having fins which permits the tow rope 5 to be held in a wide are out of the wash of the ship, thus enabling the tow rope to cover an area as wide as possible;
  • the formation of the housing and arm from plastic material provides extraordinarily light cutting devices with flat stabilizers 3 which require noadditional buoyancy members.
  • the water penetrates the piston chamber 19 throughthe slot 20 and forms a water column 28 to complete the firing pin actuating mechanism.
  • the chamber is constantly refilled through the slot 20.
  • an object 27 to be cut e.g., a steel rope
  • an object 27 to be cut arrives in front of the retaining wire 12 breaking the wire so that the force of the spring 11 causes the entire arm 9 to be brought into the open position as shown in FIG. 3.
  • This solution has the advantage that the open capture device covers a greater area and has a greater chance of catching a steel rope than a closed device.
  • the point of the ignition pin 25 is located immediately in front of the firing detonator 7 of the cutting charge 2.
  • the rope presses against the control plate 13 causing the safety shear pin to rupture.
  • the pressure of the water column 28 operates on the push-rod 22 forcing the push-rod from its seat to actuate the rocker arm 23 against the force of the leaf spring 26 and causing the rocker arm to pivot about pivot 24 so that the point of the ignition pin 25 punctures the firing detonator 7.
  • the firing detonator ignites the cutting charge 2 and since the steel rope 27 to be cut is exactly in front of the cutting charge 2, it is broken cleanly by the cutting blast of the detonating cutting charge.
  • the cutting charge upon ignition by the detonator 7 deforms the metallic lining into a cutting edge, which cuts through the steel rope or an anchoring hawser, a chain or even a cable at high speed.
  • the ceramic plate 6 is arranged as a protective screen between the cutting charge 2 and the tow rope 5 to prevent damage of the tow rope.
  • Apparatus adapted for movement underwater to partially surround and cut an underwater anchoring means such as a steel rope or chain comprising a housing, cutting charge carried by said housing, arm means connected to said housing and mounted for pivotable movement into an open position with respect to said housing, said arm means in the open position being responsive to the anchoring means for igniting said cutting charge to sever the anchoring means, and means for restraining the movement of said arm means into the open position.
  • the means includes means carried thereby and arranged for contacting the anchoring means in the open position of said arm means and responsive thereto for igniting said cuttingcharge.
  • said restraining means is a wire connecting said housing and said arm means, said wire adapted to be broken by contact with the anchoring means thereby permitting said arm means to assume the open position.
  • said arm means is formed as an angle lever and includes means carried thereby and arranged for contacting theanchoring means in the, open position, of said; am. means. and responsive thereto. for igniting said. cutting; charge.
  • igniting means includes a control plate mountedfor pivotal; movement in response to contact bythe anchoring means, a rocker arm. mounted for pivotal movement and carrying an igniting pin for contactingsaid cutting charge to ignite said charge, and actuating means-responsive to the pivotal movement of saidcontrol plate for causing movement of saidrockerarmandzsaid ignifi ing pin whereby said igniting pin ignites. said. cutting to the movement of said pison-via, the water: in said chamber for pivoting said rocker arm to.c,ause. ignition;
  • control plate being positioned along-said.
  • arm means proximate to said recess.
  • Apparatus as definedin claim 20' wherein said housingisprovidedwith astabilizer portion extending therefromiand acerarnic plate is disposed in said housing between-saidacuttingmharge and said stabilizer portion.
  • said ig niting means includes a control plate mounted for pivotal movementiin response to contact by the anchoring means, a-rocken arm mounted for pivotal'movement and carrying'an igniting pin for contacting said cutting charge toignite saidcharge, and actuating means re-' sponsiveto the pivotal movement *of said control plate forcausing movement of said rocker arm and said ignit-' ingpimwh'ereby said'igniting pin ignites said cutting charge.
  • said actuating means includes a piston chamber adapted to be filled :with water, as ring'biased piston arranged for movement-zinsaid chamber in response to the movementof'saidcontrol plate, and a push-rod responsive to :the movementof said piston via the water in said chamber -for.pivoting. said rocker arm to cause ignition ofisaid charge by said igniting pin:
  • actuating means includes a piston chamber adapted to be filled with water, a spring biased piston arranged for movement in said chamber in response to the movement of said control plate, and a push-rod responsive to the movement of said piston via the water in said chamber for pivoting said rocker arm to cause ignition of said charge by said igniting pin.
  • said igniting means includes a control plate mounted for pivotal movement in response to contact by the anchoring means, a rocker arm mounted for pivotal movement and carrying an igniting pin for contacting said cutting charge to ignite said charge, and actuating means re sponsive to the pivotal movement of said control plate for causing movement of said rocker arm and said igniting pin whereby said igniting pin ignites said cutting charge.
  • actuating means includes a piston chamber adapted to be filled with water, a spring biased piston arranged for movement in said chamber in response to the movement of said control plate, and a push-rod responsive to the movement of said piston via the water in said chamber for pivoting said rocker arm to cause ignition of said charge by said igniting pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US00190923A 1970-11-13 1971-10-20 Device for cutting steel ropes, hawsers, chains, cables and the like under the water surface Expired - Lifetime US3776165A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702055843 DE2055843C3 (de) 1970-11-13 Vorrichtung zum Kappen von Stahlseilen, -trossen, -ketten, Kabeln u.dgl. unter der Wasseroberfläche

Publications (1)

Publication Number Publication Date
US3776165A true US3776165A (en) 1973-12-04

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US00190923A Expired - Lifetime US3776165A (en) 1970-11-13 1971-10-20 Device for cutting steel ropes, hawsers, chains, cables and the like under the water surface

Country Status (3)

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US (1) US3776165A (enrdf_load_stackoverflow)
FR (1) FR2114409A5 (enrdf_load_stackoverflow)
GB (1) GB1351696A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038901A (en) * 1975-07-10 1977-08-02 Rheinmetall G.M.B.H. Submergible detonating device
US4120246A (en) * 1975-10-30 1978-10-17 Rheinmetall Gmbh Submarine explosive cable cutting device towed by a towing cable
US5419272A (en) * 1992-09-09 1995-05-30 Rheinmetall Gmbh Explosive cutter for mine moorings
CN113483980A (zh) * 2021-06-16 2021-10-08 哈尔滨工程大学 一种用于水下爆炸试验的精准布药装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330512A1 (fr) * 1975-08-14 1977-06-03 Champ Michel Cisaille pyrotechnique a charge a revetement diedrique
CN112894895B (zh) * 2020-12-25 2022-07-08 中国船舶重工集团有限公司第七一0研究所 一种海底光缆剪切器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304549A (en) * 1919-05-27 Means to protect submarine-mine fields
US2806442A (en) * 1943-10-02 1957-09-17 Temple Velocity Equipment Inc Mine anchor-line cutter
US2920532A (en) * 1957-05-24 1960-01-12 Daniel A Mcbride Cable cutter utilizing a hollow charge explosive
US3326173A (en) * 1956-04-30 1967-06-20 Kurtz Mark Multiple unit mine cable cutter
US3557384A (en) * 1969-02-24 1971-01-26 Us Army Variable infantry armor system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304549A (en) * 1919-05-27 Means to protect submarine-mine fields
US2806442A (en) * 1943-10-02 1957-09-17 Temple Velocity Equipment Inc Mine anchor-line cutter
US3326173A (en) * 1956-04-30 1967-06-20 Kurtz Mark Multiple unit mine cable cutter
US2920532A (en) * 1957-05-24 1960-01-12 Daniel A Mcbride Cable cutter utilizing a hollow charge explosive
US3557384A (en) * 1969-02-24 1971-01-26 Us Army Variable infantry armor system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038901A (en) * 1975-07-10 1977-08-02 Rheinmetall G.M.B.H. Submergible detonating device
US4120246A (en) * 1975-10-30 1978-10-17 Rheinmetall Gmbh Submarine explosive cable cutting device towed by a towing cable
US5419272A (en) * 1992-09-09 1995-05-30 Rheinmetall Gmbh Explosive cutter for mine moorings
CN113483980A (zh) * 2021-06-16 2021-10-08 哈尔滨工程大学 一种用于水下爆炸试验的精准布药装置
CN113483980B (zh) * 2021-06-16 2022-12-09 哈尔滨工程大学 一种用于水下爆炸试验的精准布药装置

Also Published As

Publication number Publication date
DE2055843B2 (de) 1976-01-15
GB1351696A (en) 1974-05-01
FR2114409A5 (enrdf_load_stackoverflow) 1972-06-30
DE2055843A1 (de) 1972-05-18

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