FI951363A - Press Top Chambers - Google Patents

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Publication number
FI951363A
FI951363A FI951363A FI951363A FI951363A FI 951363 A FI951363 A FI 951363A FI 951363 A FI951363 A FI 951363A FI 951363 A FI951363 A FI 951363A FI 951363 A FI951363 A FI 951363A
Authority
FI
Finland
Prior art keywords
bullet
pressure
gunpowder
combustion
chamber
Prior art date
Application number
FI951363A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI97912C (en
FI951363A0 (en
FI97912B (en
Inventor
Antti Juhani Eraestoe
Original Assignee
Antti Juhani Eraestoe
Seppaelae Juho Janne Pekka
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Antti Juhani Eraestoe, Seppaelae Juho Janne Pekka filed Critical Antti Juhani Eraestoe
Priority to FI951363A priority Critical patent/FI97912C/en
Publication of FI951363A0 publication Critical patent/FI951363A0/en
Publication of FI951363A publication Critical patent/FI951363A/en
Application granted granted Critical
Publication of FI97912B publication Critical patent/FI97912B/en
Publication of FI97912C publication Critical patent/FI97912C/en

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  • Emergency Lowering Means (AREA)
  • Solid-Fuel Combustion (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

This invention belongs to the field of internal ballistics, its object being to reduce the imbalance between the rapid combustion of gunpowder or other propellant, which causes the rise in pressure, and the low acceleration of the bullet in the initial stage. When the gunpowder 8 is ignited in the casing or combustion chamber 9, the bullet 1 starts moving when the pressure has risen sufficiently. The cylinder-shaped part 6 of the bullet closes off the front edge 2 of the top- pressure chamber. On its way to the barrel 7, the rear edge 5 of the cylinder-shaped part of the bullet, after it has passed the rear edge of the top-pressure chamber 3, opens the inlet for the ignited material into the top- pressure chamber 4. The combustion chamber suddenly increases in size, both pressure and temperature drop and the rate of combustion of the gunpowder is lower for a while. The bullet thus gets extra time to accelerate to a sufficient velocity. <IMAGE>
FI951363A 1995-03-23 1995-03-23 Press Top Chambers FI97912C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI951363A FI97912C (en) 1995-03-23 1995-03-23 Press Top Chambers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI951363 1995-03-23
FI951363A FI97912C (en) 1995-03-23 1995-03-23 Press Top Chambers

Publications (4)

Publication Number Publication Date
FI951363A0 FI951363A0 (en) 1995-03-23
FI951363A true FI951363A (en) 1996-09-24
FI97912B FI97912B (en) 1996-11-29
FI97912C FI97912C (en) 1997-03-10

Family

ID=8543106

Family Applications (1)

Application Number Title Priority Date Filing Date
FI951363A FI97912C (en) 1995-03-23 1995-03-23 Press Top Chambers

Country Status (1)

Country Link
FI (1) FI97912C (en)

Also Published As

Publication number Publication date
FI97912C (en) 1997-03-10
FI951363A0 (en) 1995-03-23
FI97912B (en) 1996-11-29

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Legal Events

Date Code Title Description
GB Transfer or assigment of application

Owner name: PATRIA VAMMAS OY

BB Publication of examined application
PC Transfer of assignment of patent

Owner name: PATRIA VAMMAS OY