US3641938A - Percussion or vibration fuse for explosive charge - Google Patents

Percussion or vibration fuse for explosive charge Download PDF

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Publication number
US3641938A
US3641938A US848418A US3641938DA US3641938A US 3641938 A US3641938 A US 3641938A US 848418 A US848418 A US 848418A US 3641938D A US3641938D A US 3641938DA US 3641938 A US3641938 A US 3641938A
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US
United States
Prior art keywords
battery
fuse device
contact
vibration
charge
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
US848418A
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English (en)
Inventor
Heinz Gawlick
Hellmut Bendler
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Dynamit Nobel AG
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Dynamit Nobel AG
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Filing date
Publication date
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C14/00—Mechanical fuzes characterised by the ammunition class or type
    • F42C14/02—Mechanical fuzes characterised by the ammunition class or type for hand grenades
    • F42C14/025—Mechanical fuzes characterised by the ammunition class or type for hand grenades having electric igniters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/30—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids of propellant gases, i.e. derived from propulsive charge or rocket motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/31—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids generated by the combustion of a pyrotechnic or explosive charge within the fuze
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes

Definitions

  • a gas-enriched primer charge for producing a gas pressure which serves to displace a battery so as to establish communication between the positive pole of the battery and a contact disk such that, upon impingement or vibration, an electric circuit is closed, thereby igniting a detonator and exploding the explosive charge.
  • the contact disk is suspended flexibly, at three points, by means of radially disposed springs, so that the disk can execute a motion upon vibration.
  • the positive pole of the battery includes a projection which, when the fuse is in a safety mode, is short circuited with the housing of the fuse device by means of a plate so that the explosive charge cannot be detonated even if the battery is inadvertently activated.
  • An unintentional activation of the battery could occur, for example, if potassium hydroxide solution employed in the fuse device were to leak.
  • the present invention serves to prevent detonation of the explosive charge even in the event that the solution should leak in the absence of a prior ignition of the gas-enriched primer charge.
  • a pole section of the positive pole is disposed within a bore of the contact disk and is insulated with respect to the latter by means of an insulating ring, which ring simultaneously provides a positional fixation of the contact disk when the fuse device is in a safety mode.
  • FIG. 1 represents a section through a fuse device for use in connection with hand grenades
  • FIG. 2 represents a partial fragmentary view of the device illustrated in FIG. 1, in a safety mode
  • FIG. 3 represents a cross section of the fuse device along line III-III of FIG. 2;
  • FIG. 4 represents a partial fragmentary view of the device illustrated in FIG. 1, in a live or armed position;
  • FIG. 5 represents a sectional view of a modified embodiment of a fuse device according to the present invention, ina safety mode
  • FIG. 6 represents a sectional view through the embodiment illustrated in FIG. 5, in a live or armed mode.
  • a striker element 2 is detachably secured by means of safety lever l.
  • the striker element 2 may be released by freeing the safety leverl in which case it impinges upon a primer cap3, as in conventional hand grenades.
  • the primer cap 3 in turn ignites a delay charge 4 which preferably has a burning time of 2 to 3 seconds.
  • a gas-enriched primer charge 5 is ignited by the delay charge 4; the primer charge 5 serves to conduct potassium hydroxide solution from a container 6 into an activatable battery 7 which supplies, for example, 1.5 volts or 1 ampere, whereby the battery is activated. Further, the primer charge serves to displace the battery, advancing same through a distance of several millimeters.
  • a positive pole 8 (FIG. 2) includes a projection 9, which projection is short circuited, with the fuse device in a safety mode (FIG. 2), by way of a plate 10.
  • a pole section 11 associated with .the positive pole-8 of the battery 7 is disposed such that it is surrounded by an insulating ring 12 within a contact disk 14, which disk 14 is suspended by means of three radially disposed springs 13 (FIG. 3 In this manner, the contact disk 14 is fixed in its position and is simultaneously separated from the positive pole 8 of the battery 7.
  • the contact disk 14 is accommodated within an annular support 15, which support is connected to the positive pole of the detonator (not shown).
  • the fuse illustrated in FIGS. 5 and 6 differs somewhat from that illustrated in FIGS. 2-4, principally in the construction of the member providing selective contact.
  • the positive pole 8 of the battery 7 includes a threaded extension 17 upon which a spring 18 is disposed.
  • the pin '19 of a vibrating contact 20 is disposed within the other end of the spring 18, whereby a mechanical and electrical connection is established between the positive pole 8 and the vibrating contact 20.
  • the vibrating contact 20 is short circuited with respect to the housing 16, in the safety mode, by means of a short circuit disk 21.
  • the spring 18 further serves to fix the vibrating contact 20 in its position.
  • the vibrating contact 20 penetrates the short circuit disk 21 and is then free to oscillate or vibrate due to its spring suspension.
  • the vibrating contact 20 comes into engagement with a contact cup 22, insulated with respect to the housing 16, and the circuit to the detonator is thus closed.
  • the delay tube 4 would then be constructed to afford a longer time interval, for example, 6-10 seconds of burning time.
  • the battery 7 is activated only after the time delay.
  • the operative time of the battery 7 after activation amounts to about 30 minutes when employed with a percussion fuse for a hand grenade.
  • the operative time of the battery 7 should desirably be extended to about 24 hours. This can be accomplished simply by installing a simple battery.
  • the sensitivity of the fuse for percussion or mine effect can be influenced by an appropriate configuration of the contact disk (FIG. 3), enlargement of the mass and type of design of the springs 13, as well as the of the contact 20 and the spring 18 in the embodiment illustrated in FIGS. and 6.
  • a fuse device adapted for the percussion or vibration detonation of the explosive charges of mines and hand and rifle grenades, comprising detonator means, activatable battery means, primer cap means ignited by a striker mechanism, delay tube means ignited by said primer cap means and having a burning time of a predetermined duration, gas-enriched primer charge means initiated by said delay tube means and adapted to cause activation of said battery means by producing a gas-pressurized charge which conducts an electrolytic medium into said battery means, and, simultaneously, to displace said battery means into a position wherein an electric circuit is established by vibration or percussion, which circuit includes said detonator means.
  • a fuse device according to claim 1, wherein said fuse device further includes flexibly supported contact disk means and said battery means includes a pole having a projection thereon which engages said contact disk means when said battery means is displaced by the gas produced by said primer charge means, thereby causing said circuit to close upon vibration or percussion.
  • a fuse device wherein said contact disk means is suspended by means of radially disposed spring means which permit said disk means to move upon vibration of said fuse device.
  • a fuse device further including housing means and plate means serving to short circuit said projection of said battery means with said housing means until said battery means is displaced by said gas charge produced by said primer charge means.
  • a fuse device according to claim 4, further comprising insulating ring means which serves to secure said contact disk means when said fuse device is in a safety mode, prior to displacement of said battery means.
  • a fuse device according to claim 5, wherein said contact disk means includes a bore therethrough and a section of said pole of said battery means is disposed within said bore and insulated from said disk means by said insulating ring means when said fuse device is in a safety mode.
  • a fuse device further including vibrating contact means flexibly connected with a pole of said battery means and contact cup means within which said vibrating contact means is engageable to establish, upon vibration, an electric circuit including said detonator means, after said battery means has been displaced by the gas charge produced by said primer charge means.
  • said pole of said battery means includes a threaded extension and said vibrating contact means is flexibly connected thereto.
  • a fuse device according to claim 8, further comprising coil spring means interconnecting said vibrating contact means and said threaded extension.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Bags (AREA)
  • Fuses (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US848418A 1968-08-09 1969-08-08 Percussion or vibration fuse for explosive charge Expired - Lifetime US3641938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681703991 DE1703991A1 (de) 1968-08-09 1968-08-09 Aufschlag- bzw.Erschuetterungszuender

Publications (1)

Publication Number Publication Date
US3641938A true US3641938A (en) 1972-02-15

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ID=5688655

Family Applications (1)

Application Number Title Priority Date Filing Date
US848418A Expired - Lifetime US3641938A (en) 1968-08-09 1969-08-08 Percussion or vibration fuse for explosive charge

Country Status (7)

Country Link
US (1) US3641938A (de)
BE (1) BE737259A (de)
DE (1) DE1703991A1 (de)
FR (1) FR2015366A1 (de)
GB (1) GB1273800A (de)
NL (1) NL6911480A (de)
NO (1) NO124894B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712218A (en) * 1969-08-06 1973-01-23 J Fay Safety grenade
US5526749A (en) * 1993-06-08 1996-06-18 Teetzel; James W. Laser detonated projectile apparatus
US5600086A (en) * 1993-07-22 1997-02-04 Giat Industries Target detection device using a trigger wire
WO2001018484A1 (en) * 1999-09-07 2001-03-15 Dyno Nobel Sweden Ab Detonator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2094241A5 (de) * 1970-06-15 1972-02-04 Diehl Fa
DE3475949D1 (en) * 1983-05-18 1989-02-09 Haley & Weller Ltd Pyrotechnic or explosive device having electric ignition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205322A (en) * 1962-11-27 1965-09-07 Jr Edwin G Reed Destructible magnetic switch
US3505959A (en) * 1967-04-13 1970-04-14 Diehl Safety device for fuses

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205322A (en) * 1962-11-27 1965-09-07 Jr Edwin G Reed Destructible magnetic switch
US3505959A (en) * 1967-04-13 1970-04-14 Diehl Safety device for fuses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712218A (en) * 1969-08-06 1973-01-23 J Fay Safety grenade
US5526749A (en) * 1993-06-08 1996-06-18 Teetzel; James W. Laser detonated projectile apparatus
US5600086A (en) * 1993-07-22 1997-02-04 Giat Industries Target detection device using a trigger wire
WO2001018484A1 (en) * 1999-09-07 2001-03-15 Dyno Nobel Sweden Ab Detonator
AU759187B2 (en) * 1999-09-07 2003-04-10 Detnet South Africa (Pty) Ltd Detonator
US6814005B1 (en) * 1999-09-07 2004-11-09 Dyno Nobel Sweden Ab Detonator

Also Published As

Publication number Publication date
DE1703991A1 (de) 1972-02-17
NL6911480A (de) 1970-02-11
NO124894B (de) 1972-06-19
GB1273800A (en) 1972-05-10
BE737259A (de) 1970-01-16
FR2015366A1 (de) 1970-04-24

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