US3703121A - Control element to be ignited electrically for pin entrance - Google Patents

Control element to be ignited electrically for pin entrance Download PDF

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Publication number
US3703121A
US3703121A US87112A US3703121DA US3703121A US 3703121 A US3703121 A US 3703121A US 87112 A US87112 A US 87112A US 3703121D A US3703121D A US 3703121DA US 3703121 A US3703121 A US 3703121A
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US
United States
Prior art keywords
control element
element according
pin
disk
fuze
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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
US87112A
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English (en)
Inventor
Heinz Gawlick
Hellmut Bendler
Gunter Hubsch
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
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Dynamit Nobel AG
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Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
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Publication of US3703121A publication Critical patent/US3703121A/en
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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

Definitions

  • ABSTRACT A control element to be electrically ignited for pin retraction, wherein the pin is guided in a housing in which the electrical primer element is accommodated and is optionally provided with a delay device.
  • a compression spring presses the pin with an integrally attached piston against the primer element.
  • the piston rests on a supporting element of the primer element.
  • the compression spring presses the pin with a residual force against the remaining portion of the supporting element which has been penetrated.
  • the present invention relates to a control element to be ignited electrically for pin entrance, and more particularly, to a control element wherein the pin is guided in a housing in which the electric igniter or detonator is accommodated and is optionally provided with a delay charge.
  • Control elements of the aforementioned type also known as an actuator, are intended for initiating a switching procedure upon the ignition therein of a pressure igniter charge by means of a wire or a gap fuze effected electrically by remote control.
  • a control element which has a piston, wherein a guide tube, which is disposed in an outer sleeve and associated with the piston, is provided with surfaces on its outside.
  • the propellant gases developing after the ignition of a propellant charge pass between the guide tube and the outer sleeve from the ignition side, which is located on one side of the piston, to the opposite side of the piston and, thereby, press the piston into the tube so that the piston exerts a pulling action, by way of a pin, on an element connected with the piston and disposed outside of the control element which is to be switched or controlled.
  • a control element is conventional which draws in a pin having a disk-like stem within the housing on which a compression spring rests with the opposite side of this spring being supported in the bottom of the housing.
  • the compression force of the spring presses the pin, by means of a piston stem attached to the disk-like stem of the pin, onto a firmly compressed pyrotechnical supporting or delay charge.
  • the pyrotechnical charge is converted into liquid slag, so that the piston stem of the pin can penetrate into the fuze tube and, accordingly, the pin executes a movement toward the inside.
  • a compression spring presses the pin with its integrally attached piston against the detonator or primer element with this piston resting on a supporting element of the primer element; the compression spring presses the pin, after the ignition of the detonator element and the thus-produced penetration through the supporting element, with a residual force against the remaining portion of the supporting element of the primer element.
  • the detonating or primer element consists preferably of a capsule, wherein a fuze tube containing a pressure igniter charge is disposed.
  • FIG. 1 is a partial cross-sectional view of a control element with a pyrotechnical pressure igniter charge prior to ignition or detonation;
  • FIG. 2 is a view of the control element according to FIG. 1 after ignition
  • FIG. 3 and 4 are partial cross-sectional views of a control element corresponding to the element of FIGS. 1 and 2 but with an additional delay charge;
  • FIG. 5 shows the steps of installing a supporting disk in a fuze or powder train tube.
  • the control element consists of a housing 1 from which a pin 2 extends for executing the switching or control function, i.e. it is drawn into the housing after a trigger pulse or impulse.
  • the pin 2 rests, in its armed or extended position, with the shoulder 3 of the guide portion 4 abutting against the bottom 5 of the housing and can be moved toward the inside by means of a compression spring 6 disposed between the bottom 5 of the housing and a mounting disk 7 following the guide portion 4 of the pin.
  • the lower end of the pin forms a piston 8 which tapers conically in the direction of the mounting disk 7.
  • the pin 2 is cocked or armed by way of a primer element 10 disposed in a locking screw or threaded cap 9, i.e. the pin is pushed out of the housing against the force of the spring to such an extend that the shoulder 3 contacts the bottom 5 of the housing.
  • a fuze tube 14 is disposed above the primer charge and is held in the capsule by means of a flange or bead 15.
  • a pyrotechnical pressure igniter charge 16 is pressed into the fuze tube 14.
  • the gas produced by the electrical primer charge is completely sufficient, so that the pressure igniter charge 16 can be replaced by adjusting or appropriately apportioning the electrical primer charged into the gap detonator.
  • the pressure igniter charge or the electrical primer charge can be covered in the fuze tube 14 with, for example, a varnished or lacquered lead-tinfoil and provided with a cover coating of varnish.
  • a disk 17 serves as a cover for the fuze tube 14 and simultaneously constitutes the supporting element for the tensioned or armed pin, thereby exerting a scaling function.
  • This function is attained by providing that the disk 17, prior to its installation, has a different geometrical shape than in the mounted condition.
  • the disk is, as shown in FIG. 5, curved in the center with the peripheral area 18 being parallel to the line of symmetry.
  • the disk is inserted with its curvature l9 pointing upwardly into the recess or aperture 20 of the fuze tube 14. By pressing the disk flat, an enlargement of the outer diameter is obtained which is dependent on the size of the curvature 19 of the disk. As shown in FIG.
  • the flattened disk assumes the configuration of a truncated cone with the lower peripheral portion of the disk deforming the recess 20 such that the recess assumes a corresponding shape.
  • This type of sealing withstands high pressures, so that the pyrotechnical compositions compressed thereunder are completely protected from environmental influences.
  • the mode of operation of the control element in accordance with the present invention is as follows: Upon the application of a specific electrical energy to the electric poles 12 and 13, the pulse is conducted to the initiating charge (not shown). Upon the ignition of such an initiating means, the pressure igniter charge or the electrical charge spontaneously builds up a pressure in the fuze tube 14. The pressure is directed against the disk 17, which advantageously consists of a material having a low elongation at rupture such as, for example, copper or a copper alloy such as brass which exhibits these properties after special treatment. This material can be, for example, one having the DIN (German Industrial Standard) designation E-Cu F 37 or Ms 58 F 51.
  • the disk 17 were made of a soft material, the material would be pressed upwardly at the piston 8 on the outside by the gas pressure, and the gas could escape into the space between the primer element and the mounting disk 7. Entrance of the pin 2 by the spring 6 could not be ensured thereby, since the piston 8 is only a little smaller than the receiving bore 22 for the pyrotechnical pressure igniter charge 16 in the fuze tube 14.
  • the disk 17 is ruptured along the diameter of the piston 8 of pin 2 when slightly lifted by the gas pressure, whereby the latter is moved and is accelerated by the spring 6 into the presently empty space of the fuze tube 14.
  • the disk 23 punched out of the disk 17 likewise falls into the receiving bore 22 of the fuze tube 14, as seen in FIG. 2.
  • the gas which is under pressure thereby reaches the space between the primer element and the receiving disk only when the disk 17 has been punched.
  • FIGS. 3 and 4 the construction of the fuze 10 employed in FIGS. 1 and 2 is different.
  • the control element in FIGS. 1 and 2 switches without a delay time, whereas the element of FIGS. 3 and 4 has a pyrotechnical delay unit incorporated therein.
  • the difference in the primer element 10 resides in that a pyrotechnical delay charge 26 is connected with the primer charge 25 and the pressure igniter charge 16.
  • the delay charge 26 and the pressure igniter charge 16 are pressed into the fuze tube 27 and converted with, for example, a leadtinfoil and provided with a cover layer of varnish.
  • This combined element is inserted into the primer element 10 as a prefabricated unit with this primer element, in turn, being embedded in the capsule 1 1.
  • the primer element can be manufactured in large numbers as a unit, wherein the primer composition can be covered with, for example, a lead-tinfoil and provided with a cover coating of varnish.
  • the same procedure can be followed with respect to the delay component, the unit being producible with varying delay times. Thereby, it is possible to couple the same primer elements with varying delay components. This measure simplifies the manufacture and storage of fuzes having an incorporated delay time element.
  • the primer composition 25 is first ignited and then ignites the pyrotechnical delay charge 26 which, in turn, ignites the pressure igniter charge 16 after the lapse of a certain delay period. Thereafter, as in the control element of FIGS. 1 and 2, the disk 17 is punched through and the pin 2 is retracted into the housing 1.
  • the present invention ensures that the pin 2 is securely fixed in its terminal position. This is important when, for example, the control elements are employed in a rocket in order to prevent an unintended actuation.
  • the length of the entrance or draw-in path a of the pin 2 can be modified as desired by effecting simple constructional measures at the pin 2 and/or at the primer element 10. Thus, it is possible to adapt the control element to the respective desired purpose.
  • Control element adapted to be ignited electrically, comprising a housing, pin means having a piston operatively guided in the housing, electrical detonator means arranged in the housing, said electrical detonator means include a capsule having fuze tube means, said fuze tube means being provided with recess means at the end thereof directed toward the outside, means for pressing the pin means against the detonator means to retract the pin; and supporting means in the form of a disk being mounted in a flush manner in said recess means such that the pin means rests against said disk, said disk having a curvature adapted to be pressed flat to form an enlarged outer disk diameter for peripheral flush engagement with said recess means to effect a seal between said disk and said recess means of said fuze tube means, wherein the pressing means presses the pin means against the detonator means in the starting position and, after ignition of the detonator means and penetration of the supporting means, presses the pin means with a residual force against the remaining portion of the supporting means.
  • Control element according to claim 5 wherein a delay charge is provided in the detonator means.
  • said fuze tube means includes a first fuze tube with a primer charge arranged in the capsule, and a second fuze tube containing the pressure igniter charge and a delay charge arranged in said first fuze tube.
  • fuze tube means includes a pressure igniter charge disposed therein.
  • said fuze tube means includes a first fuze tube with a primer charge arranged in the capsule, and a second fuze tube containing the pressure igniter charge and a delay charge arranged in said first fuze tube.
  • said fuze tube means includes a first fuze tube with a primer charge arranged in the capsule, and a second fuze tube containing the pressure igniter charge and a delay charge arranged in said first fuze tube.
  • Control element according to claim 11, wherein the material is from the group consisting of copper and copper alloy.
  • Control element according to claim 2 wherein the compression spring is mounted on a guide portion of the pin means.
  • Control element according to claim 1 wherein a threaded cap means is provided as a centering device and abutment for the detonator means.
  • Control element according to claim 1 wherein said supporting disk has a configuration of a truncated cone in the flattened condition.
  • Control element according to claim 1 wherein said supporting disk effects a flush mounting and sealing of said supporting disk and said recess means by deforming the walls of said recess means to correspond to the enlarged outer diameter of said disk in the flattened condition.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
US87112A 1969-11-05 1970-11-05 Control element to be ignited electrically for pin entrance Expired - Lifetime US3703121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1955703A DE1955703C3 (de) 1969-11-05 1969-11-05 Elektrisch zu zündendes Schaltelement

Publications (1)

Publication Number Publication Date
US3703121A true US3703121A (en) 1972-11-21

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ID=5750213

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Application Number Title Priority Date Filing Date
US87112A Expired - Lifetime US3703121A (en) 1969-11-05 1970-11-05 Control element to be ignited electrically for pin entrance

Country Status (9)

Country Link
US (1) US3703121A (fr)
JP (1) JPS4923127B1 (fr)
BE (1) BE758528A (fr)
CA (1) CA926895A (fr)
DE (1) DE1955703C3 (fr)
FR (1) FR2069014A5 (fr)
GB (1) GB1320158A (fr)
NL (1) NL7016074A (fr)
SE (1) SE363913B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988989A (en) * 1975-09-10 1976-11-02 The United States Of America As Represented By The Secretary Of The Navy High-pressure, electrically initiated explosive igniter
US20140290948A1 (en) * 2012-06-12 2014-10-02 Halliburton Energy Services, Inc. Pressure-Activated Switch

Families Citing this family (4)

* 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
DE3643301A1 (de) * 1986-12-18 1988-06-30 Diehl Gmbh & Co Elektrisches anzuendstueck
DE3830670C1 (en) * 1988-09-09 1989-11-23 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Actuation device
DE4326737C1 (de) * 1993-08-09 1994-03-31 Deutsche Aerospace Elektrischer Auslöser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062143A (en) * 1959-11-02 1962-11-06 Armour Res Found Detonator
US3541920A (en) * 1967-04-07 1970-11-24 Dynamit Nobel Ag Spring urged ignitable actuating element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062143A (en) * 1959-11-02 1962-11-06 Armour Res Found Detonator
US3541920A (en) * 1967-04-07 1970-11-24 Dynamit Nobel Ag Spring urged ignitable actuating element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988989A (en) * 1975-09-10 1976-11-02 The United States Of America As Represented By The Secretary Of The Navy High-pressure, electrically initiated explosive igniter
US20140290948A1 (en) * 2012-06-12 2014-10-02 Halliburton Energy Services, Inc. Pressure-Activated Switch
US9334715B2 (en) * 2012-06-12 2016-05-10 Halliburton Energy Services, Inc. Pressure-activated switch

Also Published As

Publication number Publication date
JPS4923127B1 (fr) 1974-06-13
FR2069014A5 (fr) 1971-09-03
BE758528A (fr) 1971-04-16
NL7016074A (fr) 1971-05-07
DE1955703B2 (de) 1978-02-23
CA926895A (en) 1973-05-22
DE1955703A1 (de) 1971-06-09
GB1320158A (en) 1973-06-13
DE1955703C3 (de) 1978-10-05
SE363913B (fr) 1974-02-04

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