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1. 发明专利

JPS6479594A BARREL 失效
公开(公告)号：JPS6479594A
公开(公告)日：1989-03-24
申请号：JP23498287
申请日：1987-09-21
申请人： JAPAN TECH RES & DEV INST , JAPAN STEEL WORKS LTD
发明人： MIZUNO TADASHI , TOGASHI TEPPEI , TAKASUGI MASAHIKO , KOBAYASHI HIRONOBU
IPC分类号： F41A21/10
摘要： PURPOSE: To ensure a long life gun barrel excellent in heat resistance, burning/ corrosion resistance, and wear resistance by fitting a ceramics liner to an inner surface of a cylindrical outer cylinder composed of gun barrel steel, and coupling the outer cylinder and the liner in a united manner. CONSTITUTION: A gun barrel 1 comprises an outer cylinder 2 and a liner 3, and the outer cylinder 2 comprises gun barrel steel. The liner 3 is a ceramics one where an outer surface 3a is fitted to an inner surface 2 of the outer surface, which has a length equal to the outer cylinder 2 and is pressure inserted into the outer cylinder 2 with shrink fitting and is fixed in a united manner. Once propellant is combusted, although an inner surface of the gun barrel 1 is wholly exposed to high temperature high pressure corrosive gas, ceramics is very high in heat resistance and corrosion resistance, so that melting and exfoliation are prevented from happening in an inner surface of the gun barrel 1. Further, since the ceramics is small in a friction coefficient, so that the inner surface of the gun barrel 1 is also excellent in wear resistance.

2. 发明专利

JPH1047678A IMPACT SENSING DEVICE 失效
公开(公告)号：JPH1047678A
公开(公告)日：1998-02-20
申请号：JP20562396
申请日：1996-08-05
申请人： JAPAN TECH RES & DEV INST , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANEKO TAKESHI , TOGASHI TEPPEI , SAITO HIDETOSHI , KUME MASAHIRO
IPC分类号： F42C11/02 , F23Q2/28 , G01P15/00 , G01P15/09
摘要： PROBLEM TO BE SOLVED: To perform discharge against an impact with high reliability through a simple circuit by a method wherein a piezoelectric body and a spark discharge section are electrically connected in series and a resistor is formed in a manner to be disconnectable against an impact from the outside. SOLUTION: A piezoelectric body 1 and an electric resistor 2 are arranged electrically in parallel and a spark discharge part 3 is arranged in series. When an object approaches and collides, the piezoelectric body 1 senses the collision to generate a voltage. When the voltage does not exceed a threshold, since compared with electric resistance of a spark discharge part 3, electric resistance of an electric resistor 2 is sufficiently lower, a current generated by the piezoelectric body 1 is grounded through the electric resistor 2. When the piezoelectric body 1 generates a voltage exceeding a threshold, the electric resistor 2 is disconnected and a current flows to a spark discharge part 3, and a spark is generated to operate a system.

3. 发明专利

JPH02293388A FLAME-RETARDANT EXPLOSIVE COMPOSITION 失效
公开(公告)号：JPH02293388A
公开(公告)日：1990-12-04
申请号：JP11225689
申请日：1989-05-02
申请人： JAPAN TECH RES & DEV INST , NIPPON OILS & FATS CO LTD
发明人： TOBE YOICHIRO , MIZUNO TADASHI , TAKASUGI KAIHIKO , TOGASHI TEPPEI , TORII AKIO , KATO YUKIO , ISHIDA TOSHIO , KOBAYASHI MASAKAZU
IPC分类号： C06B23/00 , C06B23/04
摘要： PURPOSE:To form a flame-retardant explosive composition capable of maintaining the capability of a system or an ammunition by compounding a specific flame-retarding agent to a secondary explosive and a binder component, thereby suppressing the combustion loss of the explosive. CONSTITUTION:The subject composition is composed of a secondary explosive, a binder component and a flame-retarding agent consisting of one or more materials selected from halogen-containing organic compound, phosphoric acid ester, halogen-containing phosphoric acid ester, inorganic phosphoric acid compound, antimony compound, metal hydroxide and boric acid compound. Tetrabromoethane, tri(chloroethyl) phosphate or tris(dichloropropyl) phosphate is especially preferable for practical use.

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