US1794732A - Primer composition - Google Patents

Primer composition Download PDF

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Publication number
US1794732A
US1794732A US152053A US15205326A US1794732A US 1794732 A US1794732 A US 1794732A US 152053 A US152053 A US 152053A US 15205326 A US15205326 A US 15205326A US 1794732 A US1794732 A US 1794732A
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Prior art keywords
primer
primer composition
mixture
composition
high explosive
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US152053A
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Charles H Pritham
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B37/00—Compositions containing a metal fulminate
    • C06B37/02—Compositions containing a metal fulminate with a nitrated organic compound or an inorganic oxygen-halogen salt

Definitions

  • the subject of this invention is a primer composition.
  • the priming compositions heretofore used in this country have contained potassium chlorate as one of their principal oxidizing ingredients.
  • potassium chlorate as one of their principal oxidizing ingredients.
  • the employment of this salt is highly undesirable owing to the fact that when the primer is tired potassium chloride is formed which is deposited in the bore of the gun and if not carefully removed will cause corrosion and pitting.
  • the barium mixture is more bulky than the potassium mixture it can not be successfully employed in the type of primer used in small arms cartridges of American manufacture in which the anvil occupies part of the space in the primer cup.
  • barium nitrate primer mixture above referred to may be modified to give successful results in less than normal charges by incorporating in the mixture a small percentage of high explosive consisting of nitrated hydrocarbons or aromatics such as trinitrotoluol trinitrobenzene, trinitroaniline, trinitroanisol, pentaei ythritete- 4a tranitrate or the like.
  • the amount of high explosive incorporated in the primer varies with the nature of the high explosive used but is generally from 4 to 8%.
  • a typical example of a non-corrosive primer composition which has been successfully used is in part the standard Swiss primer mixture and has approximately the following composition:

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Description

Patented Mar. 3, 1931 OFFICE CHARLES H. PRITHAM, F UPPER DARBY, PENNSYLVANIA PRIMER COMPOSITION N 0 Drawing.
Application filed December 1, 1926.
Serial No. 152,053.
(GRANTED UNDER THE ACT OF MARCH 3, 1883, AS AMENDED APRIL 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment to me of anyroyalty thereon.
The subject of this invention is a primer composition.
The priming compositions heretofore used in this country have contained potassium chlorate as one of their principal oxidizing ingredients. The employment of this salt is highly undesirable owing to the fact that when the primer is tired potassium chloride is formed which is deposited in the bore of the gun and if not carefully removed will cause corrosion and pitting.
The problem has been sucessfully met for many years in foreign countries by substituting barium nitrate for the potassium chlorate but the use of such improved composition is only possible in certain types of primers such as the Berdan primer,' in which the anvil is contained in the cartridge itself providing considerable space in the primer cup and allowing the use of a suflicient quantity of the primer mixture.
Because the barium mixture is more bulky than the potassium mixture it can not be successfully employed in the type of primer used in small arms cartridges of American manufacture in which the anvil occupies part of the space in the primer cup.
I have discovered that the barium nitrate primer mixture above referred to may be modified to give successful results in less than normal charges by incorporating in the mixture a small percentage of high explosive consisting of nitrated hydrocarbons or aromatics such as trinitrotoluol trinitrobenzene, trinitroaniline, trinitroanisol, pentaei ythritete- 4a tranitrate or the like.
The amount of high explosive incorporated in the primer varies with the nature of the high explosive used but is generally from 4 to 8%.
A typical example of a non-corrosive primer composition which has been successfully used is in part the standard Swiss primer mixture and has approximately the following composition:
Per cen: Fulminate of mercury 37 Barium nitrate 32 Antimony sulphide 28 Ground glass 3 To which is added high explosive"- 4 to 8 CHARLES H. PRITHAM.
US152053A 1926-12-01 1926-12-01 Primer composition Expired - Lifetime US1794732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US152053A US1794732A (en) 1926-12-01 1926-12-01 Primer composition

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Application Number Priority Date Filing Date Title
US152053A US1794732A (en) 1926-12-01 1926-12-01 Primer composition

Publications (1)

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US1794732A true US1794732A (en) 1931-03-03

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US152053A Expired - Lifetime US1794732A (en) 1926-12-01 1926-12-01 Primer composition

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