US3119334A - Detonator - Google Patents

Detonator Download PDF

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Publication number
US3119334A
US3119334A US70353A US7035360A US3119334A US 3119334 A US3119334 A US 3119334A US 70353 A US70353 A US 70353A US 7035360 A US7035360 A US 7035360A US 3119334 A US3119334 A US 3119334A
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United States
Prior art keywords
firing pin
spring
spring clip
detonator
initiator
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
US70353A
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English (en)
Inventor
Beermann Paul
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.)
RICHARD RINKER Firma
Original Assignee
RICHARD RINKER Firma
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Publication date
Application filed by RICHARD RINKER Firma filed Critical RICHARD RINKER Firma
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Publication of US3119334A publication Critical patent/US3119334A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C7/00—Fuzes actuated by application of a predetermined mechanical force, e.g. tension, torsion, pressure
    • F42C7/12—Percussion fuzes of the double-action type, i.e. fuzes cocked and fired in a single movement, e.g. by pulling an incorporated percussion pin or hammer
    • 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
    • F42C14/08—Mechanical fuzes characterised by the ammunition class or type for land mines

Definitions

  • FIG. 2 9 9 llu INVENTOR Paul Beermann ATTORNEY United States Patent C 3,119,334 DETUNATGR Panl Eeermann, Menden, Sanerland, Germany, assignor to Firms Richard Rinirer, Mention, Saneriand, Germany Filed Nov. 18, 196i), Ser. No. 70,353 Claims priority, application Germany Nov. 24, 1959 6 Claims. (Ci. Tim-81.6)
  • the present invention relates to detonators.
  • detonators such as pressure-response and pull-type detonators.
  • the objects of the present invention also include the provision of a detonator which is reliable, which can be stored for long periods of time, which can be mass-produced at low cost, and which can be safely handled even by inexperienced personnel.
  • the present invention resides mainly in a detonator comprising a tubular body having at one end thereof an end wall, a detonator element arranged at the opposite end of the body, a firing pin mounted in the body for axial movement relative to the detonator element, this firing pin having a head end adapted to project through tne end wall, spring means continually urging the firing pin towards the detonator element at the opposite end of the body, and releasable retaining means for preventing movement of the firing pin under the action of the spring means.
  • the retaining means preferably comprise a spring clip arranged exteriorly of the body and engaging a receiving groove formed in the head end of the firing pin when the head end projects through the end wall, the force of the spring means being suflicient to hold the spring clip firmly against the end wall of the tubular body, thereby sealing the one end of the body against the entry of foreign matter, while being insufiicient to move the firing pin into engagement with the detonator element against the retaining action of the clip.
  • a releasable safety pin is provided which passes through the head end of the firing pin, this safety pin having two parts engaging, respectively, opposite sides of the clip for preventing outward movement of the latter.
  • PEGURE 1 is a longitudinal sectional view of a detonator according to the present invention.
  • FiGURE 2 is a side view of the detonator as seen in a direction forming an angle of with the plane of FIGURE 1.
  • FIGURE 3 is a top plan view of the detonator.
  • FIGURE 4 shows a detail, on an enlarged scale, taken on the line d4l of FIGURE 2.
  • the body 6 carries a striker or firing pin 1, of cylindrical or polygonal cross section, having a rounded head portion 1.1: and a safety pin 2 consisting of a part having a head 2a and a stern 2b and of another part, such as nut 11, into which the stern 2b is threaded, the nut being formed with a knurled portion lie.
  • the head 2a of the safety pin carries a pull ring 2").
  • the firing pin 1 is continuously urged into the detonator, i.e., downwardly as viewed in FIGURE 1, by a compression spring 5 which is interposed between a shoulder lb of the firing pin and two washers 13 and 14 arranged at the top of the interior of the body 1.
  • the Washers 13 and 14- are made of metal and sealing material, respectively, for preventing the entry of dirt and moisture into the interior of the body l.
  • the detonator further comprises a plastic sealing cap 9 containing the initiator or detonator element proper, which can be in the form of a primer or percussion cap or a delayed-action fuse 12 that can be detonated when the firing pin it is allowed to move downwardly under the influence of the spring 5.
  • a plastic sealing cap 9 containing the initiator or detonator element proper which can be in the form of a primer or percussion cap or a delayed-action fuse 12 that can be detonated when the firing pin it is allowed to move downwardly under the influence of the spring 5.
  • a wire retaining spring 10 is provided for preventing the inward movement of the firing pin 1 under the influence of the spring 5.
  • This spring normally has the configuration best shown in FIGURE 4, namely, the retaining spring llti is in the form of a clip having two outer circular portions T3811 and two curved central portions Itiib which are spaced from each other a distance a smaller than the inner diameter b of the outer circular portions ltla, the diameter 1) being greater than the outside diameter d of the firing pin 1 and the distance a corresponding to the smallest diameter of an annular groove to of substantially semi-circular cross section, within which groove the spring portions lltib are received.
  • the spring has a generally circular cross section, so that the cross sectional configurations of the spring and of the groove will complement each other.
  • the thickness of the spring 14) is equal to about twice the depth of the groove 1c. If it is desired to make the thickness of the spring it more than twice the depth of the groove is, this can be done by imparting to the groove a slightly less than semi-circular cross section.
  • opposite junctions lilo at which the spring portions Mia and Nb meet are spaced apart a distance 0 which is smaller than the distance a.
  • the outer circular portions Ma of the retaining spring it ⁇ lie against a sealing cap 4 arranged at the top of the body 1, and the spring is held in this position by the action of the spring 5.
  • the spring 10 which actually prevents the spring 5 from drawing the firing pin 1 into engagement with the primer or other detonator element 12.
  • the purpose of the safety pin 2 is to hold the retaining spring it? in place; this result is achieved by so arranging the parts that the head 2a and the part 11 en gage the spring portions Jltib, i.e., the sides of the spring lib, as shown in FIGURE 1, thereby preventing the spring from moving out of the annular groove 10 of the firing pin 1.
  • the pin 2 will, of course, also act as a safety de vice which positively prevents the downward movement of the firing pin into the body 6, should the retaining spring 10 inadvertently become damaged and leave the groove 10.
  • the configuration and strength of the spring 10 are such that even when the safety pin 2, 11, is removed, the firing pin 1 will be held in place by the spring 10, i.e., the spring 5 is not strong enough to force the retaining spring out of the groove 10 because the radial force exerted by the spring 10 will not be overcome by the radial component which the spring 5 can exert through the camming action between the firing pin 1 and the spring 10.
  • the detonator described above may be actuated, once the safety pin 2, 11, has been removed, by exerting a sufiicient force in the direction of the double arrow 1:3 (FIGURE 2).
  • the force in the direction of the arrow may be exerted by a suitable trip wire attached to the outer portions 10a of the retaining spring 10, or by otherwise applying a sufiicient pulling or pushing force.
  • the firing pin 1 will be free to move downwardly under the action of the spring 5.
  • the detonator may also be actuated by applying a sufiicient force in the direction of the arrow 16 (FIGURE 2); this may occur when a certain force, such as a weight, is brought to bear on the head end in.
  • the force will have to be just enough to spread the central portions 16b of the spring 10 apart sufiiciently to force the spring 10 out of the groove 10, and this will free the firing pin for downward movement under the influence of the spring 5.
  • a detonator according to the present invention can be activated by a pushing or pulling force, such as by a trip wire attached to one of the outer circular portions 10a of the spring clip 10, or by pressure applied in the direction of the axis of the firing pin 1.
  • a pushing or pulling force such as by a trip wire attached to one of the outer circular portions 10a of the spring clip 10, or by pressure applied in the direction of the axis of the firing pin 1.
  • the arrangement of the parts is such that so long as the safety pin 2, 11, is in place, there is no danger of inadvertently detonating the device, so that the wires or the like may be safely attached to the spring clip.
  • the entire arrangement is reliable in operation, it can be mass-produced at low cost and, thanks to the sealing afforded by the interaction of the various parts, particularly by the pressure exerted on the cap 4, it is possible to store the detonator for long periods without adversely afiecting its reliability and useful life.
  • a detonator comprising, in combination: a tubular body having at one end thereof an end wall; an initiator arranged at the opposite end of said body; a firing pin mounted in said body for axial movement relative to said initiator, said firing pin having a head end normally projecting through said end wall, said normally projecting head end having a receiving groove; spring means continuously urging said firing pin towards said initiator at said opposite end of said body; and releasable retaining means for preventing movement of said firing pin under the action of said spring means, said retaining means comprising a flat spring clip arranged exteriorly of Said body and having two curved central portions which are received within said receiving groove of said firing pin head end and two outer circular portions each joining both of said two curved central portions and projecting laterally beyond said tubular body, the force of said spring means being sufficient to hold said spring clip firmly against the outer surface of said end wall of said tubular body, thereby sealing said one end of said body against the entry of foreign matter, while being insuflicient to move said firing pin
  • said retaining means further comprise a releasable safety pin passing through said head end of said firing pin, said clip extending around said firing pin head end and said safety pin engaging said two curved central portions of said clip which are received in said groove to prevent said two central portions from spreading apart, thereby preventing withdrawal of said clip from said groove.
  • a detonator as defined in claim 2 wherein said safety pin comprises a stem having a head at one end thereof and a nut threadable onto the free end of said stem, said head and nut engaging said curved central portions of said clip, respectively.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Emergency Lowering Means (AREA)
US70353A 1959-11-24 1960-11-18 Detonator Expired - Lifetime US3119334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER26784A DE1122425B (de) 1959-11-24 1959-11-24 Schlagbolzenzuender fuer Sprengladungen aller Art

Publications (1)

Publication Number Publication Date
US3119334A true US3119334A (en) 1964-01-28

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ID=7402282

Family Applications (1)

Application Number Title Priority Date Filing Date
US70353A Expired - Lifetime US3119334A (en) 1959-11-24 1960-11-18 Detonator

Country Status (5)

Country Link
US (1) US3119334A (zh)
BE (1) BE594332A (zh)
DE (1) DE1122425B (zh)
GB (1) GB926680A (zh)
NL (2) NL256803A (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411402A (en) * 1967-02-03 1968-11-19 Pike Corp Of America Apparatus for launching rocketpropelled shells
US3865027A (en) * 1974-01-28 1975-02-11 Richard C Dubno Hand grenade with safety mechanism
US4020764A (en) * 1974-02-26 1977-05-03 Hagenuk & Co. Gmbh Detonator
WO2022133609A1 (en) * 2020-12-22 2022-06-30 Sparkes James Robert Perimeter breach warning alarm

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT317065B (de) * 1972-02-16 1974-08-12 Olaf Reeh Ing Vorrichtung zum Auslösen der Betätigung eines Schaltgliedes
DE2345336C2 (de) * 1973-09-07 1985-01-03 Reeh, geb. Hoffmann, Mathilde, 8034 Germering Befestigung von Stolperdrähten an einem Auslösekopf eines Springminenzünders

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1213397A (en) * 1916-05-08 1917-01-23 William Mills Hand-grenade, incendiary and other bomb, and the like.
US1304544A (en) * 1919-05-27 conrad and c
US1358652A (en) * 1917-01-19 1920-11-09 Us Ordnance Co Grenade
US2100698A (en) * 1933-05-26 1937-11-30 Morner Eric Goran Grenade
US2512179A (en) * 1948-01-30 1950-06-20 Edward M Shinkle Fuse for hand grenades
US2684142A (en) * 1949-07-19 1954-07-20 Hoffman Radio Corp Clutch for radio controls
US2717042A (en) * 1950-03-31 1955-09-06 Specialties Dev Corp Impact operated valve
GB765026A (en) * 1951-11-02 1957-01-02 Renato Sorlini Improvements relating to field mines
US2853007A (en) * 1953-11-19 1958-09-23 Casati Gianni Verga Combined priming and ignition tube for firing ordnance or explosives

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR865240A (fr) * 1940-01-16 1941-05-16 Sageb Dispositif de mise de feu pour engin explosif

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1304544A (en) * 1919-05-27 conrad and c
US1213397A (en) * 1916-05-08 1917-01-23 William Mills Hand-grenade, incendiary and other bomb, and the like.
US1358652A (en) * 1917-01-19 1920-11-09 Us Ordnance Co Grenade
US2100698A (en) * 1933-05-26 1937-11-30 Morner Eric Goran Grenade
US2512179A (en) * 1948-01-30 1950-06-20 Edward M Shinkle Fuse for hand grenades
US2684142A (en) * 1949-07-19 1954-07-20 Hoffman Radio Corp Clutch for radio controls
US2717042A (en) * 1950-03-31 1955-09-06 Specialties Dev Corp Impact operated valve
GB765026A (en) * 1951-11-02 1957-01-02 Renato Sorlini Improvements relating to field mines
US2853007A (en) * 1953-11-19 1958-09-23 Casati Gianni Verga Combined priming and ignition tube for firing ordnance or explosives

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411402A (en) * 1967-02-03 1968-11-19 Pike Corp Of America Apparatus for launching rocketpropelled shells
US3865027A (en) * 1974-01-28 1975-02-11 Richard C Dubno Hand grenade with safety mechanism
US4020764A (en) * 1974-02-26 1977-05-03 Hagenuk & Co. Gmbh Detonator
WO2022133609A1 (en) * 2020-12-22 2022-06-30 Sparkes James Robert Perimeter breach warning alarm

Also Published As

Publication number Publication date
GB926680A (en) 1963-05-22
BE594332A (fr) 1961-10-18
DE1122425B (de) 1962-01-18
NL256803A (zh)
NL113600C (zh)

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