← Back to Patent Explorer
US4145969A Expired / Lapsed US ⏱️ 0.0 years remaining

Priming system for high-temperature stable propellants

Assignee: Dynamit Nobel AG
•
Filing: 1977-10-12
•
Granted: 1979-03-27
•
Expires: 1997-10-12
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A priming system for propellants having thermal decomposition points above 180° C. comprising: A. an ignition charge; and B. a booster charge of solid explosive compound containing one or more --NO 2 groups and/or --N═N end groups and having a deflagration point above 200° C., said booster charge containing an initiating explosive in an amount between 10% and 60% by weight; The amount of the ignition charge A being between 2 and 20 weight % of the booster charge B.

Inventors

  • 👤 Heinz Gawlick
  • 👤 Gunther Marondel
  • 👤 Werner Sieglein

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 08:48
CPC Classifications
C; C06; C06C; C06C7/00; C06B; C06B25/00; C06B25/04; C06B25/34; C06B35/00

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 214 words
A priming system for a propellant having a thermal decomposition point above 180° C. comprising: A. an ignition charge selected from the group consisting of heavy metal azites, heavy metal salts of mono-, di- and trinitroresorcinol, lead phloroglucinate, heavy metal picrates, azotetrazole lead, diazodinitrophenol, and a mixture of 80% of a cerium-magnesium alloy and 20% of lead oxide; B. a booster charge of a mixture of B1. a solid explosive compound having one or more --NO 2 groups and/or --N═N groups and having a deflagration point above 200° C., said solid explosive compound being selected from the group consisting of hexanitrodiphenyl, hexanitrodiphenyl oxide, hexogen, octogen, tetryl, a triazole, a tetrazole, 5-aminotetrazole, guanylamino-5-tetrazole, 1-guanyl-3-tetrazolyl-5-guanidine, ditetrazole, diaminoguanidineditetrazole, diaminoguanidine azotetrazole, hexanitrodiphenyloxamide, hexanitrodiphenylsulfone, hexanitrodiphenylsulfide, hexanitrodiphenylamine, tetranitrocarbazole, tetranitroaniline, hexanitrostibene, hexanitroanilide, cyclotetramethylenetetranitramine and a hexanitrodiphenyl of the formula ##STR3## wherein A represents the group ##STR4## wherein n is a whole number between 1 and 3, or A represents the group --NH--CO--CO--HN-- or --NH--CO--HN--; and B2. between 10 and 60% by weight of an initiating explosive selected from the group consisting of heavy metal azides, heavy metal salts of mono-, di- and trinitroresorcinol, lead phlorogludinate, heavy metal picrates, azotetrazole lead and diazodinitrophenol, the amount of the ignition charge A being between 2 and 20% by weight of the booster charge B.
Claim 2
Dependent Claim 214 words
A priming system for a propellant having a thermal decomposition point above 180° C. comprising: A. an ignition charge selected from the group consisting of heavy metal azites, heavy metal salts of mono-, di- and trinitroresorcinol, lead phloroglucinate, heavy metal picrates, azotetrazole lead, diazodinitrophenol, and a mixture of 80% of a cerium-magnesium alloy and 20% of lead oxide; B. a booster charge of a mixture of B1. a solid explosive compound having one or more --NO 2 groups and/or --N═N groups and having a deflagration point above 200° C., said solid explosive compound being selected from the group consisting of hexanitrodiphenyl, hexanitrodiphenyl oxide, hexogen, octogen, tetryl, a triazole, a tetrazole, 5-aminotetrazole, guanylamino-5-tetrazole, 1-guanyl-3-tetrazolyl-5-guanidine, ditetrazole, diaminoguanidineditetrazole, diaminoguanidine azotetrazole, hexanitrodiphenyloxamide, hexanitrodiphenylsulfone, hexanitrodiphenylsulfide, hexanitrodiphenylamine, tetranitrocarbazole, tetranitroaniline, hexanitrostibene, hexanitroanilide, cyclotetramethylenetetranitramine and a hexanitrodiphenyl of the formula ##STR3## wherein A represents the group ##STR4## wherein n is a whole number between 1 and 3, or A represents the group --NH--CO--CO--HN-- or --NH--CO--HN--; and B2. between 10 and 60% by weight of an initiating explosive selected from the group consisting of heavy metal azides, heavy metal salts of mono-, di- and trinitroresorcinol, lead phlorogludinate, heavy metal picrates, azotetrazole lead and diazodinitrophenol, the amount of the ignition charge A being between 2 and 20% by weight of the booster charge B.
Claim 3
Dependent Claim 16 words
A priming system according to claim 1 wherein the explosive composition contains a --NO 2 group.
Claim 4
Dependent Claim 16 words
A priming system according to claim 1 wherein an explosive compound contains a --N═N end group.
Claim 5
Dependent Claim 17 words
A priming system according to claim 1 wherein the explosive is a hexanitrodiphenyl or a derivative thereof.
Claim 6
Dependent Claim 15 words
A priming system according to claim 1 wherein the solid explosive compound is hexanitrodiphenyl oxide.
Claim 7
Dependent Claim 17 words
A priming system according to claim 1 wherein the solid explosive compound is tetrazole or its derivative.
Claim 8
Dependent Claim 40 words
A priming system according to claim 1 wherein there are two charges which are pressed together to form cylinders whose diameter amounts to not more than 5 mm and whose length amounts to at most 3× to 4× the diameter.
Claim 9
Dependent Claim 44 words
A priming system according to claim 1 wherein the solid explosive compound is a hexanitrodiphenyl of the general formula ##STR5## wherein A represents the group ##STR6## wherein n is a whole number between 1 and 3, or A represents the group --NH--CO--CO--HN-- or --NH--CO--HN--.
Claim 10
Dependent Claim 29 words
A priming system according to claim 1 wherein the solid explosive compound is selected from the group consisting of triazoles, tetrazole, 5-aminotetrazole, guanylamino-5-tetrazole, 1-guanyl-3-tetrazolyl-5-guanidine, ditetrazole, diaminoguanidineditetrazole and diaminoguanadine azotetrazole.
Claim 11
Dependent Claim 38 words
A priming system according to claim 1 wherein the initiating explosive is selected from the group consisting of heavy metal azides, heavy metal salts of mono-, di- and trinitroresorcinol, lead phloroglucinate, heavy metal picrates, azotetrazole lead and diazodinitrophenol.
Claim 12
Dependent Claim 20 words
A priming system according to claim 1 wherein the ignition charge is positioned successively with respect to the booster charge.
Claim 13
Dependent Claim 16 words
A priming system according to claim 1 wherein the ignition charge is a pyrotechnical ignition mixture.
Claim 14
Dependent Claim 25 words
A priming system according to claim 1 wherein the ignition charge is a mixture of 80% of a cerium-magnesium alloy and 20% of lead oxide.
Claim 15
Dependent Claim 38 words
A priming system according to claim 1 wherein the ignition charge is selected from the group consisting of heavy metal azides, heavy metal salts of mono-, di- and trinitroresorcinol, lead phloroglucinate, heavy metal picrates, azotetrazole lead and diazodinitrophenol.
Claim 16
Dependent Claim 17 words
A priming system according to claim 1 wherein said solid explosive compound is hexogen, octogen or tetryl.

References Cited (Backward Citations)

US3418372A Cited
US3040055A Cited
US3611939A Cited
US3173921A Cited
US3558720A Cited
US3562332A Cited
US3659527A Cited
US3899536A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-26 1982-09-25 1983-03-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-26 1986-09-25 1987-03-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-26 1990-09-25 1991-03-27 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag