GB1441963A – Controlled shearing of metal parts
– Google Patents
GB1441963A – Controlled shearing of metal parts
– Google Patents
Controlled shearing of metal parts
Info
Publication number
GB1441963A
GB1441963A
GB1620873A
GB1620873A
GB1441963A
GB 1441963 A
GB1441963 A
GB 1441963A
GB 1620873 A
GB1620873 A
GB 1620873A
GB 1620873 A
GB1620873 A
GB 1620873A
GB 1441963 A
GB1441963 A
GB 1441963A
Authority
GB
United Kingdom
Prior art keywords
charge
fuse
cylinder
detonator
metal member
Prior art date
1972-06-26
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
GB1620873A
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.)
Forces Armees Francaises
Original Assignee
Forces Armees Francaises
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.)
1972-06-26
Filing date
1973-06-15
Publication date
1976-07-07
1973-06-15
Application filed by Forces Armees Francaises
filed
Critical
Forces Armees Francaises
1976-07-07
Publication of GB1441963A
publication
Critical
patent/GB1441963A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F42—AMMUNITION; BLASTING
F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
F42B3/00—Blasting cartridges, i.e. case and explosive
F42B3/006—Explosive bolts; Explosive actuators
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
H01H39/006—Opening by severing a conductor
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
H02G1/005—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for cutting cables or wires, or splicing
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T83/00—Cutting
Y10T83/869—Means to drive or to guide tool
Y10T83/8772—One tool edge of tool pair encompasses work [e.g., wire cutter]
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T83/00—Cutting
Y10T83/869—Means to drive or to guide tool
Y10T83/8821—With simple rectilinear reciprocating motion only
Y10T83/8858—Fluid pressure actuated
Y10T83/8863—Explosive fluid
Abstract
1441963 Shearing; punching ETAT FRANCAIS 15 June 1973 [26 June 1972 11 Jan 1973] 16208/73 Heading B3W A method of effecting rupture of a metal member and separation of parts of the member so ruptured comprises subjecting the member to pure shearing stresses resulting from explosion of a charge having a mass energy of at least 100 joules/gram and α detonation velocity of at least 3000 metres/sec., the charge being housed in a housing, at least part of one wall of which provides a surface on which gases available on explosion of the charge can act in effecting rupture and separation of parts of the metal member, which surface is provided either by surface of the metal member or by a surface of a displaceable member which bears at a forward surface thereof directly or indirectly on a surface of the metal member, the quantity of the explosive charge being such that the volume initially available to said gases is not more than half the volume available when said rupture and separation of parts is achieved. In a circuit breaker, Fig. 1, a metal member 10 to be sheaved comprising a hollow cylinder 10A screwed on a terminal 2 and a cylinder 10B frictionally engaging a contact portion 70 of a terminal 1, grooves 11, 12 forming a plane of weakness at the desired shearing plane. Explosive charge 14 and detonator 15 are housed in a recess 13. To interrupt normal flow of current between terminals 1 and 2 a firing current is supplied to the detonator, shearing occurs along the plane 11-12 and the portion 10B is driven against a lead cylinder 17, causing plastic or permanent deformation of the cylinder. In a second embodiment of circuit breaker (Fig. 2, not shown) a punch (26) and an insulating pad (27) are interposed between the open side of the charge housing (23) and a portion (28a) of a metal plate (28) which constitutes a calibrated fuse, a row of perforations (30) defining opposed edges of the fuse. The plate (28) extends out of opposed slots in a cover (29) screwed to a body (21) in which a member (32) housing the charge (25) is mounted. When current is supplied to an explosive wire of detonator (24) the fuse portion is sheared from the plate, the insulating pad (27) being moved to span the gap in the plate (28). The face of the pad (27) adjacent the fuse is preferably covered with metal sheet or foil. The sheared fuse portion (28a) may eventually contact two further terminals and so close a control or measuring circuit. A bolt or cable cutter, Fig. 3a comprises a cylinder 41 with opposed openings for the cable &c. and a piston 52 formed with a tapered blade 55 shaped to embrace the cable &c. and coacting with a similar fixed blade 57. An explosive charge 50 of lead nitrate and pentrite is housed in a ring 51 opening on to an exploding wire detonator 48 at one side and the rear face of the piston on the other.
GB1620873A
1972-06-26
1973-06-15
Controlled shearing of metal parts
Expired
GB1441963A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
FR7222959A
FR2200770A5
(en)
1972-06-26
1972-06-26
FR7300809A
FR2213829B2
(en)
1972-06-26
1973-01-11
Publications (1)
Publication Number
Publication Date
GB1441963A
true
GB1441963A
(en)
1976-07-07
Family
ID=26217181
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1620873A
Expired
GB1441963A
(en)
1972-06-26
1973-06-15
Controlled shearing of metal parts
Country Status (6)
Country
Link
US
(2)
US3873786A
(en)
BE
(2)
BE794113A
(en)
DE
(2)
DE2317930C2
(en)
FR
(2)
FR2200770A5
(en)
GB
(1)
GB1441963A
(en)
NL
(2)
NL7303259A
(en)
Families Citing this family (71)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4062112A
(en)
*
1977-02-17
1977-12-13
Lake Hilton J
Explosively operated wire cutter
US4224487A
(en)
*
1978-02-23
1980-09-23
Simonsen Bent P
Fast acting explosive circuit interrupter
FR2456585A1
(en)
*
1979-05-16
1980-12-12
Pyromeca
Shears for underwater cutting of long cables – has housing with slot for cable cut by shear driven by explosive
DE8705445U1
(en)
*
1987-04-11
1988-08-11
Robert Krups Stiftung & Co Kg, 5650 Solingen, De
US5070787A
(en)
*
1988-06-24
1991-12-10
The Board Of Regents Of The University Of Texas System
Method and apparatus for switching an electrical circuit
US5097786A
(en)
*
1988-09-27
1992-03-24
Sheffield Woodrow W
Method and apparatus for erecting and removing offshore structures
US5036588A
(en)
*
1989-10-02
1991-08-06
The United States Of America As Represented By The Secretary Of The Navy
Nonvolatile, fast response wire cutter
US5060837A
(en)
*
1990-10-29
1991-10-29
G & H Technology, Inc.
Method and apparatus for severing an optical fiber
FR2668803A1
(en)
*
1990-11-06
1992-05-07
Europ Agence Spatiale
Device for protection against sparks produced by a bolt with controlled breakage
DE4413847B4
(en)
*
1993-05-03
2004-09-09
Volkswagen Ag
Device for motor vehicles for the accident-related disconnection of an electrical energy source from an electrical system
DE4430284B4
(en)
*
1993-12-24
2006-03-30
Volkswagen Ag
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DE4422249A1
(en)
*
1994-06-24
1996-02-15
Temic Bayern Chem Airbag Gmbh
Device for interrupting the current flow in the ground cable of a motor vehicle battery
DE4438157C1
(en)
*
1994-10-26
1995-12-07
Daimler Benz Aerospace Ag
Explosive cutting apparatus
JP3373102B2
(en)
*
1996-01-31
2003-02-04
株式会社東芝
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US5703315A
(en)
*
1996-04-25
1997-12-30
Loral Vought Systems Corporation
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US5990572A
(en)
*
1997-02-28
1999-11-23
Harness System Technologies Research, Ltd.
Electric circuit breaker for vehicle
DE19728658A1
(en)
*
1997-07-04
1999-01-07
Dynamit Nobel Ag
Pyrotechnic active element
US6295930B1
(en)
*
1998-01-08
2001-10-02
Harness System Technologies Research, Ltd.
Circuit breaker
US6222439B1
(en)
*
1998-02-17
2001-04-24
Sumitomo Wiring Systems, Ltd.
Circuit breaking device
DE19817133A1
(en)
*
1998-04-19
1999-10-28
Lell Peter
Power disconnecting switch for emergency use in high current circuits, especially vehicles
JP3426508B2
(en)
*
1998-06-30
2003-07-14
矢崎総業株式会社
Low melting material fusing device and circuit breaker
NO984024D0
(en)
*
1998-09-02
1998-09-02
Lenni Arnt Madsen
Device for automatically cutting the minus and / or plus cable from the battery in a vehicle
JP2000149745A
(en)
*
1998-11-16
2000-05-30
Yazaki Corp
Circuit breaking device
DE19902073A1
(en)
*
1999-01-20
2000-08-10
Bosch Gmbh Robert
Electrical conductor with ignition device
JP3568817B2
(en)
*
1999-03-10
2004-09-22
矢崎総業株式会社
Circuit breaker
DE29904474U1
(en)
*
1999-03-12
2000-08-31
Connectool Gmbh & Co
Device for cutting strand-like material
JP3798194B2
(en)
*
1999-08-03
2006-07-19
矢崎総業株式会社
Circuit breaker
JP2001052584A
(en)
*
1999-08-03
2001-02-23
Yazaki Corp
Circuit breaker
JP3797590B2
(en)
*
1999-08-25
2006-07-19
矢崎総業株式会社
Power breaker
JP2001068000A
(en)
*
1999-08-27
2001-03-16
Yazaki Corp
Circuit breaker
DE29920021U1
(en)
*
1999-11-15
2001-05-10
Weidmueller Interface
Device for cutting strand-like material
DE10205369B4
(en)
*
2002-02-10
2004-03-25
Lell, Peter, Dr.-Ing.
Electrical fuse, in particular pyrotechnic fuse for interrupting high currents in electrical circuits
US6843157B2
(en)
*
2002-06-13
2005-01-18
Autoliv Asp, Inc.
Severing vehicle battery cable
US7063019B2
(en)
*
2002-07-11
2006-06-20
Autoliv Asp, Inc.
Assemblies including extendable, reactive charge-containing actuator devices
US20060027120A1
(en)
*
2002-07-11
2006-02-09
Smith Bradley W
Assemblies including extendable, reactive charge-containing actuator devices
US20040041682A1
(en)
*
2002-08-29
2004-03-04
Pasha Brian D.
Battery circuit disconnect device
ATE380328T1
(en)
*
2003-02-04
2007-12-15
Delphi Tech Inc
PYROMECHANICAL SEPARATION ELEMENT
DE102004008120A1
(en)
*
2003-02-26
2004-11-25
Dynamit Nobel Ais Gmbh Automotive Ignition Systems
Pyromechanical separating device with specially shaped current conducting rail has cable connectors at both end pieces at right angles to plane of separating point formed by conductor narrow point
EP1492139B1
(en)
*
2003-06-26
2016-01-06
Autoliv Development AB
Chisel for pyromechanical separator
ATE373536T1
(en)
*
2003-07-29
2007-10-15
Delphi Tech Inc
PYROTECHNICALLY DRIVEN SEPARATING DEVICE FOR SEPARATING SOLID, COMPACT MATERIALS
DE102004023415A1
(en)
*
2003-07-29
2005-03-31
Dynamit Nobel Ais Gmbh Automotive Ignition Systems
Pyrotechnically driven separating device for separating solid, compact materials
US7207253B2
(en)
*
2003-08-11
2007-04-24
B & B Controls
Parachute line cutting device
US7239225B2
(en)
*
2003-10-17
2007-07-03
Special Devices, Inc.
Pyrotechnic circuit breaker
US7498923B2
(en)
*
2004-09-08
2009-03-03
Iversen Arthur H
Fast acting, low cost, high power transfer switch
WO2006027251A1
(en)
*
2004-09-09
2006-03-16
Lisa Dräxlmaier GmbH
Load shedder
DE102005010125A1
(en)
*
2005-03-02
2006-09-07
Rheinmetall Waffe Munition Gmbh
Ammunition, in particular programmable large caliber ammunition
US7934682B2
(en)
*
2006-10-13
2011-05-03
Manfredi Dario P
Aircraft safety system
DE102007014339A1
(en)
*
2007-03-26
2008-10-02
Robert Bosch Gmbh
Thermal fuse for use in electrical modules
CN101178993B
(en)
*
2007-12-07
2010-04-14
合肥南南电力保护设备有限公司
Great current quick-speed turning on-off body
JP5359982B2
(en)
*
2009-06-29
2013-12-04
豊田合成株式会社
Electric circuit breaker for vehicle
DE102009037396B4
(en)
2009-08-13
2012-08-16
Wafios Ag
Pyrotechnically operated cutting device
FR2957452B1
(en)
*
2010-03-15
2012-08-31
Snpe Materiaux Energetiques
ELECTRIC SWITCH WITH PYROTECHNIC ACTUATION
JP4915473B1
(en)
*
2010-12-27
2012-04-11
ダイキン工業株式会社
Cutting device
WO2012090384A1
(en)
*
2010-12-27
2012-07-05
ダイキン工業株式会社
Cutting device
JP5056941B2
(en)
*
2010-12-27
2012-10-24
ダイキン工業株式会社
Cutting device
JP5874583B2
(en)
*
2012-08-29
2016-03-02
豊田合成株式会社
Conduction interruption device
EP2996134B1
(en)
*
2014-09-09
2017-04-26
Airbus Safran Launchers SAS
Pyrotechnic circuit breaker with improved cutting of the bus bar
EP2996133B8
(en)
*
2014-09-09
2017-08-23
ArianeGroup SAS
Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof
DE102015107579B3
(en)
*
2015-05-13
2016-08-04
Lisa Dräxlmaier GmbH
Fuse with explosion chamber
US11239038B2
(en)
*
2015-05-18
2022-02-01
Gigavac, Llc
Mechanical fuse device
US10566160B2
(en)
2015-05-18
2020-02-18
Gigavac, Llc
Passive triggering mechanisms for use with switching devices incorporating pyrotechnic features
DE102015009278B4
(en)
*
2015-07-21
2017-04-27
Jenoptik Advanced Systems Gmbh
Cable winch system for a winch and method for operating a cable cutter for a winch
CN105458388A
(en)
*
2016-01-19
2016-04-06
江苏宏威重工机床制造有限公司
Stress field thermal relaxation optimized hydraulic plate shearing machine
DE102016122424B4
(en)
*
2016-11-22
2023-06-07
Auto-Kabel Management Gmbh
Arc breaker disconnect device
US10622176B2
(en)
*
2017-10-11
2020-04-14
Key Safety Systems, Inc.
High voltage electric line cutter device
US11072030B2
(en)
*
2017-11-20
2021-07-27
Barton G. Selby
Aquatic animal detangling device of benthic gear and mooring lines
RU2705859C1
(en)
*
2018-06-04
2019-11-12
Акционерное общество «Научно-производственное предприятие «Краснознаменец»
Separation bolt with obturation system
US10763064B2
(en)
*
2018-12-12
2020-09-01
Key Safety Systems, Inc.
Electric fuse box or junction box assembly with a high voltage electric line cutter device
US11443910B2
(en)
2019-09-27
2022-09-13
Gigavac, Llc
Contact levitation triggering mechanisms for use with switching devices incorporating pyrotechnic features
RU2740458C1
(en)
*
2020-07-08
2021-01-14
Акционерное общество «Научно-производственное предприятие «Краснознаменец»
Explosive bolt
CN113935074B
(en)
*
2021-09-17
2023-01-31
北京理工大学
Safety control chip for transient self-destruction system of memory
Family Cites Families (18)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US346170A
(en)
*
1886-07-27
lester osgood
US3125108A
(en)
*
1964-03-17
Interstage explosively operated hy-
US2365364A
(en)
*
1943-06-26
1944-12-19
Temple Velocity Equipment Inc
Outlet valve
US2495953A
(en)
*
1946-08-26
1950-01-31
Austin Frank
Wire line cutter
US2970506A
(en)
*
1956-06-22
1961-02-07
Mine Safety Appliances Co
Explosively actuated cable cutting tool using a live cartridge for producing gaseous pressure
US2929892A
(en)
*
1957-11-19
1960-03-22
Raymond Engineering Lab Inc
Explosive actuated switch
US3119298A
(en)
*
1960-08-04
1964-01-28
Hi Shear Corp
Explosively separable fastener
US3246396A
(en)
*
1963-04-11
1966-04-19
Mine Safety Appliances Co
Explosive cutting tool for cable and the like
DE1438870A1
(en)
*
1963-10-22
1969-02-06
Bofors Ab
relay
US3742859A
(en)
*
1965-04-02
1973-07-03
Us Navy
Explosive charge
US3452631A
(en)
*
1967-04-17
1969-07-01
Atlas Chem Ind
Reefing line cutter
US3393605A
(en)
*
1967-08-31
1968-07-23
Paul E. Parnell
Explosively actuated device for high pressure environment
US3732129A
(en)
*
1967-12-22
1973-05-08
Dynamit Nobel Ag
Explosive charges initiated by exploding wires
US3523477A
(en)
*
1969-01-15
1970-08-11
Us Army
Subminiature reefing line cutter
US3707896A
(en)
*
1970-05-26
1973-01-02
Kh Aviatsionnyj Institut
Machine for working metals by impulses
US3640169A
(en)
*
1970-07-24
1972-02-08
Us Air Force
Pyrotechnic remote cutter
US3739673A
(en)
*
1972-01-12
1973-06-19
Mine Safety Appliances Co
Water pressure actuated electric switch for cable cutter
US3745276A
(en)
*
1972-03-01
1973-07-10
Cartridge Actuated Devices
Circuit breaking device
1972
1972-06-26
FR
FR7222959A
patent/FR2200770A5/fr
not_active
Expired
1973
1973-01-11
FR
FR7300809A
patent/FR2213829B2/fr
not_active
Expired
1973-01-16
BE
BE794113D
patent/BE794113A/en
not_active
IP Right Cessation
1973-03-08
NL
NL7303259A
patent/NL7303259A/xx
active
Search and Examination
1973-04-10
DE
DE2317930A
patent/DE2317930C2/en
not_active
Expired
1973-05-08
US
US35840773
patent/US3873786A/en
not_active
Expired – Lifetime
1973-06-15
GB
GB1620873A
patent/GB1441963A/en
not_active
Expired
1973-12-14
NL
NL7317153A
patent/NL7317153A/xx
active
Search and Examination
1974
1974-01-11
DE
DE2401358A
patent/DE2401358C2/en
not_active
Expired
1974-01-11
BE
BE139727A
patent/BE809647R/en
not_active
IP Right Cessation
1974-01-14
US
US43330174
patent/US3895552A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
DE2401358C2
(en)
1985-04-25
FR2213829A2
(en)
1974-08-09
NL7317153A
(en)
1974-07-15
FR2213829B2
(en)
1976-11-05
NL7303259A
(en)
1973-12-28
US3895552A
(en)
1975-07-22
DE2317930A1
(en)
1974-02-21
BE809647R
(en)
1974-07-11
BE794113A
(en)
1973-05-16
DE2317930C2
(en)
1983-11-17
DE2401358A1
(en)
1974-07-18
US3873786A
(en)
1975-03-25
FR2200770A5
(en)
1974-04-19
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Legal Events
Date
Code
Title
Description
1976-11-17
PS
Patent sealed [section 19, patents act 1949]
1993-07-14
PE20
Patent expired after termination of 20 years
Effective date:
19930614
