US1950019A - Detonator - Google Patents

Detonator Download PDF

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Publication number
US1950019A
US1950019A US606303A US60630332A US1950019A US 1950019 A US1950019 A US 1950019A US 606303 A US606303 A US 606303A US 60630332 A US60630332 A US 60630332A US 1950019 A US1950019 A US 1950019A
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US
United States
Prior art keywords
cap
explosive material
case
primary
detonator
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
US606303A
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English (en)
Inventor
Biazzi Mario Felice Federico
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1950019A publication Critical patent/US1950019A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00Blasting cartridges, i.e. case and explosive
    • F42B3/10Initiators therefor
    • F42B3/195Manufacture

Definitions

  • the compound detonators actually used are constituted by a metallic cartridge or ,chased case into which is compressed in one or several times a so called secondary explosive material (generally a nitro derivated from the 4aromatic series) and a metallic cap or washer bored with a hole in it and which is introduced into the cartridge after having placed in this latter and over the secondary explosive material a small quantity of a so called primary explosive material (fulminate of mercury, nitride or lead or the like) the object of which is to start the detonation of the secondary explosive which gives to the detonator its real priming power.
  • a so called secondary explosive material generally a nitro derivated from the 4aromatic series
  • a metallic cap or washer bored with a hole in it and which is introduced into the cartridge after having placed in this latter and over the secondary explosive material a small quantity of a so called primary explosive material (fulminate of mercury, nitride or lead or the like) the object of which is to start the detonation of the secondary explosive which
  • the compression of the primary explosive material in the detonator is made after the cap has been set in its place and by means or a compressing punoli which acts on the cap and indirectly on 'the primary explosive material in which the cap is thrust down by this means.
  • an efficient compression oi the primary load is is in tact close to the compressing punch, e. near the bottom ci the cap, that the strongest compression said load ie obtained.; 'the marirriuin den sity Zone of said load is thus limited near the tor, the compression thereol decre s og and more towards the lower eno; primary load.
  • Fig. l is a sectional view of the detonator oi the invention.
  • Fig. 2 is a sectional view of the separated members of the detonator.
  • Fig. 3 is a further sectional vievtT ci the detoriator0 Figs. Li and 5 Vare sectional views, respectively, of the two separated or joined members of the detonator loaded with intermediate sensibility explosive material.
  • Figs. il and 7 show modifications of the cap of the detonator.
  • the minimum density zone of the primary explosive material 4 that the succession of the densities, such as it isA in the present detonators, is not a rational one.
  • the primary load is compressed inside cap 2 with its maximum density in 4 near the open part of the cap where the compressing punch acts.
  • Another advantage of the invention is the fact that the very high pressure of the primary explosive material decreases its capillarity and makes it impossible for the moisture to penetrate by the side of the cap.
  • the greater coherency thus obtained prevents any loss of primary explosive material throughthe hole in the cap either during the different manipulations of the detonator, during'the manufacture in the works, or during the transport and use thereof.
  • caps provided in their bottom ol a hollowspace 6 made by punching the bottom 2 of cap 2 .( Figure 6) or made inside the thickness of the bottom wall of cap 2 ( Figure 7); said hollow space being used for placing a relay load, thus placed between the lighting means of the detonator and the primary explosive material 4, in order to make easier the lighting or to prime the primary explosive material, if necessary.
  • this .latter shall be itself put and compressed in said hollow space 6'under a very much reduced volume with reference to'an ordinary volume.
  • a process for loading detonators which consists in compressing a primary explosive material in a cap, then compressing in said cap an explosive material having high power and a sensibility to impact intermediate between the primary explosive material and the secondary explosive material, separately loading the secondary explosive material in a case and forcingsaid cap into said case.
  • a detonator comprising a case, a secondary explosive material compressed in said case, a cap within vsaid case, 'a primary explosive material partly filling said cap, and in said cap and in contact with the zone of maximum density of the primary explosive material an explosive having power and sensibility to impact intermediate be'- tween the primary and the secondary material.
  • a detonator comprising a case, a secondary explosive material compressed in said case, a cap within said case, a primary explosive material compressed in said cap and in, contact by its zone of maximum density with the secondary explosive material Within the case, a hollow provided in said cap, and primary explosive'material within said hollow.
  • detonators which consists in compressing a primary explosive material in a cap, separately loading a secondary explosive material in a case, then 'compressing in one of said caps or cases a secondary explosive material of higher power and sensibility in posi tion to llie between and in contact with the primary and secondary materials in the finished detonators, and forcing vsaid cap into said case.
  • a detonator comprising a case, a secondary explosive material compressed in said case, a cap within said case, a primary explosive material compressed in said cap and in contact by its zone of maximum density with the secondary explosive material within the case, a hollow provided in said cap and a relay load in said hollow and between the firing means of the detonator and the primary explosive material.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US606303A 1931-04-29 1932-04-20 Detonator Expired - Lifetime US1950019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR642465X 1931-04-29

Publications (1)

Publication Number Publication Date
US1950019A true US1950019A (en) 1934-03-06

Family

ID=8998824

Family Applications (1)

Application Number Title Priority Date Filing Date
US606303A Expired - Lifetime US1950019A (en) 1931-04-29 1932-04-20 Detonator

Country Status (6)

Country Link
US (1) US1950019A (fr)
BE (1) BE381075A (fr)
DE (1) DE642465C (fr)
FR (1) FR732263A (fr)
GB (1) GB387545A (fr)
NL (1) NL34459C (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap
US2517763A (en) * 1946-04-10 1950-08-08 Hercules Powder Co Ltd Blasting cap
US2541334A (en) * 1944-05-20 1951-02-13 Atlas Powder Co Explosive assembly and method of making it
US2617326A (en) * 1943-06-16 1952-11-11 Ici Ltd Explosive primer
US4170178A (en) * 1976-12-21 1979-10-09 Werkzeugmaschinenfabrik Oerlikon-Buhrle Detonator containing octogen crystals for projectiles and method of manufacturing the same
US4625648A (en) * 1983-10-01 1986-12-02 Rheinmetall Gmbh Projectile propelling charge and method of manufacture thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1187531B (de) * 1961-09-13 1965-02-18 Oerlikon Buehrle Ag Vorrichtung fuer gerichtete Zuendung von Sprengladungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap
US2617326A (en) * 1943-06-16 1952-11-11 Ici Ltd Explosive primer
US2541334A (en) * 1944-05-20 1951-02-13 Atlas Powder Co Explosive assembly and method of making it
US2517763A (en) * 1946-04-10 1950-08-08 Hercules Powder Co Ltd Blasting cap
US4170178A (en) * 1976-12-21 1979-10-09 Werkzeugmaschinenfabrik Oerlikon-Buhrle Detonator containing octogen crystals for projectiles and method of manufacturing the same
US4625648A (en) * 1983-10-01 1986-12-02 Rheinmetall Gmbh Projectile propelling charge and method of manufacture thereof

Also Published As

Publication number Publication date
DE642465C (de) 1937-03-05
GB387545A (en) 1933-02-09
FR732263A (fr) 1932-09-15
BE381075A (fr)
NL34459C (fr)

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