US3541920A - Spring urged ignitable actuating element - Google Patents

Spring urged ignitable actuating element Download PDF

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Publication number
US3541920A
US3541920A US719652A US3541920DA US3541920A US 3541920 A US3541920 A US 3541920A US 719652 A US719652 A US 719652A US 3541920D A US3541920D A US 3541920DA US 3541920 A US3541920 A US 3541920A
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US
United States
Prior art keywords
actuating member
spring
piston
charge
housing
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
US719652A
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English (en)
Inventor
Reinhold Rapp
Heinz Gawlick
Hellmut Bendler
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3541920A publication Critical patent/US3541920A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F42B3/087—Flexible or deformable blasting cartridges, e.g. bags or hoses for slurries
    • F42B3/093—Flexible or deformable blasting cartridges, e.g. bags or hoses for slurries in mat or tape form

Definitions

  • the translating actuating member of the element is held against the bias of a spring by a member that will release it in response to the heat given off by an electrically actuated pyrotechnic charge.
  • the member may be a metallic plate or wire meltable or deformable in response to the heat given off by the pyrotechnic charge or a ring spring radially expansible in response to the heat.
  • Cartridge-type actuating elements wherein a relatively gas deficient propellant charge is remotely ignited to move a piston or a buckling metallic sleeve to bring about or release an actuating or regulating operation.
  • Electric primers are advantageous forremote control.
  • a piston-cylinder type of actuating element wherein the propellant charge will relatively move the two to provide a pushing or pulling action.
  • the charge being ignited on one side of the piston and passing across to exert its pressure on the other side of the piston.
  • the pyrotechnic charge or composition may be designed to develop a sufficient amount of heat, but no pressure. This heat may be used to melt a metallic member holding the piston in its initial position against the pressure of the spring. Instead of meltable metallic member, a metallic member, for example a steel disk, may be employed that will directly engage the charge or composition so that it is deformed by and progressively moved into the slag formed by the burning charge or composition, with the piston moving concurrently therewith.
  • the charge or composition may be designed so that it will burn to produce a pressure sufficient for displacing the piston against the pressure of the spring.
  • the spring may be placed behind the piston at its terminal position for preventing return of the piston.
  • FIG. 1 is an axial partial cross-sectional view of an actuating element with an actuating piston that will move inwardly;
  • FIG. 2 is a similar view of another actuating element with an outwardly moving actuating piston
  • FIG. 3 is another embodiment of the FIG. 1 device
  • FIG. 4 illustrates another actuating element with an outwardly moving piston
  • FIG. 5 shows another embodiment of the actuating element with an outwardly moving piston.
  • a cover disk 4 having a centrally located aperture 5 filled with a primer charge 6 to be electrically ignited by means of the series connected positive pole 7 and current supply lines 8 and 9.'
  • the supporting ring 11 is mounted between the positive pole 7 and the flanged end 10 of the easing 1.
  • the other side of the pyrotechnic charge is covered by means of the closure disk 12 which may consist of Woods metal, or an alloy having a melting temperature of 200C., for example.
  • the disk 12 is securely held in its position by means of the spacer sleeve 13, the supporting ring 14 having a central aperture 15, and the inwardly flanged end 16 of the casing 1.
  • a piston 17 is guidingly disposed within the spacer sleeve 13 constituting an actuating member together with its integral stud or pin 18 on one side and its piston rod 19 on its other side.
  • the outer end 19:: of the piston rod 19 projects through the central aperture 15 of the supporting ring 14.
  • the outwardly projecting end of the extension 19a may be suitable connected with the device to be operated by the actuating element.
  • the primer 'charge 6 When current is supplied to the lines 8 and 9, the primer 'charge 6 is ignited to in turn ignite and burn the pyrotechnic charge or delay composition 3, which burning will develop a relatively small amount of or no gas but sufficient heat to melt the central portion of the disk 12 so that the pin 18 will move downwardly into the charge 3 concurrently with movement of the piston 17 and piston rod 19 under the bias of the spring 20 toward the tube 2 until axially abutting the tube 2 at the terminal position of the actuating member 17, 18, 19, 19a; the residual pressure of the spring 20 maintaining this terminal position.
  • pyrotechnic charge and/or delay composition 3 may be covered with a metallic lamina (not shown), for example of steel, that will not melt but will be pressed into the slag of the burning pyrotechnic charge 3 by the pin 18 acting under the pressure of the spring 20.
  • FIG. 3 numerals have been used that correspond with those of FIG. 1 and the above description is equally applicable with respect thereto.
  • closure caps or covers 25 and 26 are screwed into the ends of the cylindrical casing or housing 1 of FIG. 3, which construction has the advantage that the assembly of the actuating element a is considerably simplified and defective or spent parts may be replaced.
  • the casing 1 is provided with an annular shoulder 27 for axially fixing, in one direction, 'the' position of the small tube 2 containing therein the pyrotechnic charge 3.
  • FIG. 3 In contrast' to FIG.
  • the closure disk 28 of the pyrotechnic charge 3 on one side of the piston 17 is not placed upon the annular end face of the small tube 2, but instead :is provided as a steel disk 7 and fitted precisely into the inside aperture of the small tube 2 directly upon the pyrotechnic charge and/or delay composition 3.
  • the primer charge of the electric primer is disposed within the casing of the igniting primer 7, which works in principle identical to the electric primer of the FIG. 1, device.
  • the piston or piston rod 19 has a reduced diameter axial extension 19a with a further reduced diameter stud 30 screwed into the disk or plate 31 that will be used as a control element before and after firing.
  • the ring spring 20 engages the right-hand shoulder of the actuating member 19 to resiliently retain it in its initial position biased directly against the charge 3; this shoulder being a cam or wedge-type annular surface.
  • the charge 3 will produce a small amount of gas to exert a pressure upon the actuating element 19 to move it towards the right, as viewed in FIG. 4, so that the actuating member 19 will move through the spring ring 20, which will be radially expanded.
  • the spring 20 After'the actuating member 19 has moved to the right through the spring 20, the spring 20 will radially contract to its original diameter behind the rear abutment surface of the actuating member 19 to retain it in its forward terminal position.
  • the screw cap is provided with an internal portion of increased diameter 29 to allow the above described movement ofthe actuating member to the right and at the same time to define an abutment facing to the left that determines the terminal position of the actuating member 19 with respect to its outward movement.
  • the actuating member 19, 19a will move outwardly in the direction of the arrow as will the actuating member of the FIG. 4 device.
  • Corresponding numerals have been applied to parts corresponding to those previously described.
  • the actuating member 19, 19a is held in its illustrated initial position against the force of the compressed coil spring 20 by means of the tensioned wire 33 extending through the transverse bore 32 in the journal or stud integral with the actuating member 19, 190 at one end and secured at its other lower end to the casing or housing.
  • the pyrotechnic charge 3 is ignited by means of the electric primer 7 to produce heat sufficient for melting the wire 33 at least at its ends adjacent to the charge 3.
  • the spring 20 will move the thus released actuating member 19, 19a forwardly, that is, upwardly with respect to the illustrated position of FIG. 5, until the forwardly facing shoulder of the actuating member engages the rearwardly facing shoulder of the casing at the terminal position where it will be securely held by the residual pressure applied by the still compressed spring 20.
  • An actuating element comprising: a housing; an actuating member mounted'for relative movement in the direction of actuation with respect to said housing between a normal first position and a second actuated position; a pyrotechnic composition charge within said housing; means for igniting said pyrotechnic charge; a spring operatively mounted biased between said housing and said actuating member in both of said positions; said spring and said pyrotechnic charge constituting at least in part means for securely holding said actuating member in each ofits positions and for moving said actuating member from said first position to said second position in response to ignition of said pyrotechnic charge, said actuating member and said spring are disposed, in alignmennwithin said housing, said housing including fixed opposed abutment surfaces each preventing movement of said actuating member in one direction in each of its two positions, respectively; said securely holding and moving means including a member between said housing and said actuating member holding said actuating member in its first position against the bias of said spring; said member consisting essentially
  • said securely holding and moving means includes a metallic means engaging said pyrotechnic charge and operatively interposed between said housing and said actuating member to hold said actuating member in its firstposition and being bodily movable into the slag of the burning pyrotechnic charge under the bias of said spring to allow movement of said actuating member.
  • said securely holding and moving means includes a wire secured between said actuating member and said housing normally holding said actuating member in its first position against the force of said spring; and said wire comprising a material having a relatively low melting temperature substantially lower than the temperature of the burning pyrotechnic mixture and substantially above the normal ambient temperatures to be melted solely by the heat given off from the burning of said pyrotechnic charge to release said actuating member for movement to said second position under the bias of said spring.
  • said housing includes a tubular casing having screw threads at its opposite ends; a cap screwed into each of said ends and having a central aperture therein; said actuating member extending through the central aperture of one of said caps and electrical supply leads extending through the central aperture of the other of said caps; said igniting means including an electrically actuated primer incircuit with said leads.
  • An actuating element comprising; a housing; an actuating member mounted for relative movement in the direction of actuation'with respect to said housing between a normal first position and a second actuated position; a pyrotechnic composition charge within said housing; means for igniting said pyrotechnic charge; a spring operatively mounted biased between said housing and said actuating member in both of said positions; said spring and said pyrotechnic charge constituting at least in part means for securely holding said actuating member in each of its positions and for moving said actuating member from said first position to said second position in .response to ignition of said pyrotechnic charge, wherein said housing includes a tubular casing inwardly flanged at its opposite ends to retain said actuating member, said spring, said pyrotechnic charge, said igniting means therein; and wherein said securely holding and moving means includes a member between said housing and said actuating member holding said actuating member in its first position against the bias of said spring;
  • An actuating element comprising: a housing; an actuating member mounted for relative movement in the direction of actuation with respect to said housing between a normal first position and a second actuated position; a pyrotechnic composition charge within said housing; means for igniting said pyrotechnic charge; a spring operatively mounted biased between said housing and said actuating member in both of said positions; said.
  • said actuating member is a piston andsaid housing includes a tubular casing slidably receiving said piston therein, said igniting means including a series-connected electrically ignited primer and wherein said securely holding and moving means includes a metallic member between said housing and said actuating member holding said actuating member in its first position against the bias of said spring; said metallic memberconsisting essentially of a material readily meltable at relatively low temperatures substantially below the burning temperature of said 7.
  • An actuatingelement comprising: a housing; an actuating member mounted for relative movement in the direction of actuation with respect to said housing between a normal first position and a second actuated position; a pyrotechnic composition charge within said housing; means for igniting said pyrotechnic charge; a spring operatively mounted biased between said housing and said actuating member in both of said positions; said spring and said pyrotechnic charge constituting at least in part means for securely holding said actuat ing member in each of its positions and for moving said actuating member from said first position to said second position in response to ignition of said pyrotechnic charge, wherein said spring resiliently biases said actuating member from said first position to said second position; said securely holding and moving means including a plate immediately adjacent said pyrotechnic charge and blocking movement of said actuating member from said first position to said second position; said plate comprising a material having a relatively low melting temperature substantially below the burning temperature of said pyrotechnic charge and substantially above the normal ambient temperatures

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Fuses (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Air Bags (AREA)
US719652A 1967-04-07 1968-04-08 Spring urged ignitable actuating element Expired - Lifetime US3541920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0052735 1967-04-07

Publications (1)

Publication Number Publication Date
US3541920A true US3541920A (en) 1970-11-24

Family

ID=7054411

Family Applications (1)

Application Number Title Priority Date Filing Date
US719652A Expired - Lifetime US3541920A (en) 1967-04-07 1968-04-08 Spring urged ignitable actuating element

Country Status (9)

Country Link
US (1) US3541920A (enrdf_load_stackoverflow)
BE (1) BE713288A (enrdf_load_stackoverflow)
DE (1) DE1646335C3 (enrdf_load_stackoverflow)
DK (1) DK122349B (enrdf_load_stackoverflow)
FR (1) FR1567316A (enrdf_load_stackoverflow)
GB (1) GB1221105A (enrdf_load_stackoverflow)
IL (1) IL29763A (enrdf_load_stackoverflow)
NL (1) NL6804814A (enrdf_load_stackoverflow)
NO (1) NO122693B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640174A (en) * 1971-01-13 1972-02-08 Us Air Force Pyromechanical release device
US3703121A (en) * 1969-11-05 1972-11-21 Dynamit Nobel Ag Control element to be ignited electrically for pin entrance
US3961481A (en) * 1972-07-13 1976-06-08 Nikolai Trofimovich Romanenko Arrangement for retaining an actuating member in an extreme position
EP0004967A3 (de) * 1978-04-17 1979-11-14 Mohl, Werner, Prof. DDr. Einrichtung zum Festlegen eines Sondenkopfes, insbesondere einer Kardialsonde
EP1350148A4 (en) * 2000-10-25 2006-03-22 Lockheed Corp DESTRUCTIBLE BOLT ACTIVE SPRING RELEASE DEVICE
US7114427B1 (en) * 2005-10-19 2006-10-03 Special Devices, Inc. Quick-loosening mechanical linking device
US20090229485A1 (en) * 2008-03-14 2009-09-17 Autoliv Asp, Inc. Pyrotechnic actuator for retracting a piston
US20100257983A1 (en) * 2009-04-10 2010-10-14 Bae Systems Information And Electronic Systems Integration Inc. Method and apparatus for rapid severance of a decoy towline
US8881637B2 (en) * 2013-03-15 2014-11-11 Sargent Manufacturing Company Door lock access control component mounting
CN107108032A (zh) * 2014-10-17 2017-08-29 斯凯克公司 用于从飞行设备发射物体的方法和设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328184C3 (de) * 1973-06-02 1981-06-25 Dynamit Nobel Ag, 5210 Troisdorf Elektrisch zu zündendes Schaltelement für Stifteinzug
DE2701935A1 (de) * 1977-01-19 1978-07-20 Dynamit Nobel Ag Druckgasbetaetigtes schaltelement
DE3643301A1 (de) * 1986-12-18 1988-06-30 Diehl Gmbh & Co Elektrisches anzuendstueck

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703121A (en) * 1969-11-05 1972-11-21 Dynamit Nobel Ag Control element to be ignited electrically for pin entrance
US3640174A (en) * 1971-01-13 1972-02-08 Us Air Force Pyromechanical release device
US3961481A (en) * 1972-07-13 1976-06-08 Nikolai Trofimovich Romanenko Arrangement for retaining an actuating member in an extreme position
EP0004967A3 (de) * 1978-04-17 1979-11-14 Mohl, Werner, Prof. DDr. Einrichtung zum Festlegen eines Sondenkopfes, insbesondere einer Kardialsonde
EP1350148A4 (en) * 2000-10-25 2006-03-22 Lockheed Corp DESTRUCTIBLE BOLT ACTIVE SPRING RELEASE DEVICE
US7114427B1 (en) * 2005-10-19 2006-10-03 Special Devices, Inc. Quick-loosening mechanical linking device
US20090229485A1 (en) * 2008-03-14 2009-09-17 Autoliv Asp, Inc. Pyrotechnic actuator for retracting a piston
US7735405B2 (en) * 2008-03-14 2010-06-15 Autoliv Asp, Inc. Pyrotechnic actuator for retracting a piston
US20100257983A1 (en) * 2009-04-10 2010-10-14 Bae Systems Information And Electronic Systems Integration Inc. Method and apparatus for rapid severance of a decoy towline
US8387501B2 (en) * 2009-04-10 2013-03-05 Bae Systems Information And Electronic Systems Integration Inc. Method and apparatus for rapid severance of a decoy towline
US8881637B2 (en) * 2013-03-15 2014-11-11 Sargent Manufacturing Company Door lock access control component mounting
CN107108032A (zh) * 2014-10-17 2017-08-29 斯凯克公司 用于从飞行设备发射物体的方法和设备
EP3206950A4 (en) * 2014-10-17 2018-05-23 Skycat Oy A method and an apparatus to shoot an object from a flying apparatus
CN107108032B (zh) * 2014-10-17 2021-02-19 斯凯克公司 用于从飞行设备发射物体的方法和设备

Also Published As

Publication number Publication date
NL6804814A (enrdf_load_stackoverflow) 1968-10-08
FR1567316A (enrdf_load_stackoverflow) 1968-05-16
DK122349B (da) 1972-02-21
DE1646335B2 (de) 1973-03-29
BE713288A (enrdf_load_stackoverflow) 1968-08-16
IL29763A (en) 1972-12-29
IL29763A0 (en) 1968-11-27
DE1646335A1 (de) 1971-07-15
GB1221105A (en) 1971-02-03
DE1646335C3 (de) 1973-10-25
NO122693B (enrdf_load_stackoverflow) 1971-07-26

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