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61. 发明专利

JPS5857483B2 JPS5857483B2 - 失效
公开(公告)号：JPS5857483B2
公开(公告)日：1983-12-20
申请号：JP11691177
申请日：1977-09-30
申请人： Hitachi Ltd
发明人： KOYAMA TETSUO , SOENO HIROSHI , KOMURO KATSUHIRO
IPC分类号： B22F5/00 , B22F3/11 , B22F3/12 , C22C1/04 , C22C1/08 , C22C5/06 , C22C9/00

62. 发明专利

JPS57155025A QUICK HEATING TYPE GLOW PLUG FOR DIESEL ENGINE 失效
公开(公告)号：JPS57155025A
公开(公告)日：1982-09-25
申请号：JP3939281
申请日：1981-03-20
申请人： HITACHI LTD
发明人： KOYAMA TETSUO , IIJIMA SHIROU
IPC分类号： F23Q7/00
摘要： PURPOSE:To improve durability and quick heatability by using a composite core material having a positive high resistance temperature coefficient and covered with a metal or an alloy having a higher oxidation resistance than that of the core material for heating element. CONSTITUTION:An iron core metal 2 having a positive high resistance temperature coefficient is inserted into an alloy tube 1 made of heat proof metals, such as Ni-Cr, Ni-Cr-Fe and Fe-Cr-Al for covering. Through this constitution, a temperature in a complex resistance wire is first increased quickly as the conductivity depends on iron up to a temperature of about 700 deg.C. Then, when specific electric resistance of the core material 2 becomes almost equal to that of the heat resistant alloy tube 1, the heat generated by the resistance becomes controllable with the heat resistant alloy, the temperature dependence is lowered and the Joule heat attains the limit at a fixed temperature without a special control circuit. Then, the heat resistane is improved and preheating time can be reduced.

63. 发明专利

JPS5712221A GLOW PLUG FOR DIESEL ENGINE 失效
公开(公告)号：JPS5712221A
公开(公告)日：1982-01-22
申请号：JP8513480
申请日：1980-06-25
申请人： HITACHI LTD
发明人： TAKEDA SEIJIROU , HARADA KOUJI , IIJIMA SHIROU , KOYAMA TETSUO
IPC分类号： F23Q7/00
摘要： PURPOSE:To improve the heat resistance and the durability of a glow plug, by forming the heating body of the glow plug of a cermet, the cermet being produced by combining ceramic particles of silicon carbide or the like with a metal powder of nickel or the like. CONSTITUTION:The glow plug comprises a protective tube 2 of a nickel-chrome- iron alloy, a conductive center shaft 4 of a mild steel housed in the tube 2, and the heating body 3 of a cermet connected to the tip of the shaft 4. Into the space between the heating body 3, the conductive center shaft 4 and the protective tube 2 is filled with an insulating material powder 5 of magnesia or the like. The heating body 3 is obtained by mixing for example 70% by weight of ceramic particles of silicon carbide or the like with, for example, 30% by weight of a metal powder of nickel or the like, molding the mixture, and then sintering it. In this case, after the sintering, its electric specific resistance is set, at for example, 100muOMEGA.cm or more.

64. 发明专利

JPS54131861A DIRECTTHEATED CATHODE FOR ELECTRIC DISCHARGE TUBE 失效
公开(公告)号：JPS54131861A
公开(公告)日：1979-10-13
申请号：JP3920278
申请日：1978-04-05
申请人： HITACHI LTD
发明人： ANDOU HISASHI , TENNO HIROSHI , SAKAMOTO HIROSHI , KOYAMA TETSUO , KAWAMURA TAKAO , FUKUSHIMA HIROSHI
IPC分类号： H01J1/14 , H01J1/15 , H01J29/04
摘要： PURPOSE:To obtain a cathode which features the excelllent heat electron radiation property for a long period of time by specifying the quantity of the zirconium contained in the cathode substrate in which the heat electron radioactive oxide layer is combined with the nickel discontinuous layer. CONSTITUTION:The cathode substrate formed at the foot part 4 and flat panel part 1 is composed of the alloy containing 20-30 wt% pf tungsten (W), 0.01- 0.25 wt% of zirconium (Zr) and the rest of nickel (Ni). And the alkaline earth metal oxide layer 2 of (Ba, Sr, Ca) O, etc. is baked on panel 1 as the heat electron radioactive oxide layer via discontinuous layer 3 of Ni powder formed previously. This Ni-powder layer function to secure a rigid combination between layer 2 and part 1, and layer can be given a direct contact with part 1 because of the discontinuity of the layer. Thus, the lowering of the heat electron radiation property in a short time can be prevented, and furthermore the best state is secured for the heat electron radiation quantity by specifying the range of the Zr content.

65. 发明专利

JPS5417359A MANUFACTURE OF CLAD 失效
公开(公告)号：JPS5417359A
公开(公告)日：1979-02-08
申请号：JP8108377
申请日：1977-07-08
申请人： HITACHI LTD
发明人： ANDOU HISASHI , TENNO HIROSHI , KOYAMA TETSUO , SAKAMOTO HIROSHI , OOTAKA KIYOSHI
IPC分类号： B32B15/01 , B23K20/00 , B23K20/16 , B32B15/00
摘要： PURPOSE:To enhance the adherence of a clad at its interface by putting metal foil between a covering plate and a base plate each coated with an org. medium or coating the base metal with a mixt. of the org. medium and metal powder and mounting the covering plate, followed by rolling.

66. 发明专利

JPS53126858A MANUFACTURE OF DIRECT HEATED CATHODE STRUCTURE 失效
公开(公告)号：JPS53126858A
公开(公告)日：1978-11-06
申请号：JP4129577
申请日：1977-04-13
申请人： HITACHI LTD
发明人： ANDOU HISASHI , TENNO HIROSHI , SAKAMOTO HIROSHI , KOYAMA TETSUO , OOTAKA KIYOSHI
IPC分类号： B22F5/00 , C22C19/03 , H01J9/04
摘要： PURPOSE:To decrease the malformation of the cathode substrate for the direct heated cathod structure as well as to reduce the dispersion of the malformation amount, by forming a recycled pressure powder substance through repetition of the formation and destruction of a pressure powder substance and securing a micro metal composition.

67. 发明专利

JPS5395564A MANUFACTURE FOR DIRECTLY HEATED TYPE CATHOD RAY TUBE COMPOSITE CATHODE MATERIAL 失效
公开(公告)号：JPS5395564A
公开(公告)日：1978-08-21
申请号：JP969577
申请日：1977-02-02
申请人： HITACHI LTD
发明人： KOYAMA TETSUO , TENNO HIROSHI , ANDOU HISASHI , SAKAMOTO HIROSHI , OOTAKA KIYOSHI
IPC分类号： H01J9/04
摘要： PURPOSE:To manufacture the composite cathode material for CRT having a good bonding between metallic base plate and Ni or Ni alloy coated plate and having no peeling off at the bonding part at cold strip.

68. 发明专利

JPS51100914A SHOKETSUTAINO SEIZOHO 失效
公开(公告)号：JPS51100914A
公开(公告)日：1976-09-06
申请号：JP2502875
申请日：1975-03-03
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： HIRAGA RYO , FUKUI HIROSHI , HATAYA FUMIO , KOYAMA TETSUO , KOMURO KATSUHIRO
IPC分类号： B22F3/10 , B22F3/24

69. 发明专利

JPH11213336A THIN-FILM MAGNETIC HEAD AND ITS PRODUCTION 失效
公开(公告)号：JPH11213336A
公开(公告)日：1999-08-06
申请号：JP1099098
申请日：1998-01-23
申请人： HITACHI LTD
发明人： FUKAZAWA KATSUYA , KOYAMA TETSUO , SUZUKI NOBUO
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To shorten the cutting time and to improve the yield by arranging a rotary electrode and a rotating grinding wheel in parallel, using the grinding wheel corrected at the front end angle by electric discharge forming while intersecting the electrode and the grinding wheel forward and backward in the rotary axis direction and cutting a substrate by a wire saw delivered from a guide roller having a formed V-groove. SOLUTION: A wire is wound around the guide roller and while a polishing material is sprayed, the substrate is subjected to wire saw cutting under conditions, for example, a wire feed 200 m/min, a wire diameter 0.12 mm and a depth of cut of 2.8 mm. The V-groove forming grinding wheel 6 of the guide roller is rotated at 1200 revolutions/min and is moved to the rotary electrode 7 rotating at 1500 revolutions/min at an intersection angle 40 deg. of the flanks with each other and a speed of 10 mm/min, to execute electric discharge forming. At this time, the radius of curvature of 30 μm and angle of 42 deg. of the grinding wheel are obtd. by using an electric discharge voltage of 150 V and peak current of 20A. As a result, the formation of the highly accurate shape is made possible and the working yield is improved.

70. 发明专利

JPH1112028A BETA"-ALUMINA-SINTERED SOLID ELECTROLYTE AND ITS PRODUCTION 失效
公开(公告)号：JPH1112028A
公开(公告)日：1999-01-19
申请号：JP17147197
申请日：1997-06-27
申请人： HITACHI LTD
发明人： KOYAMA TETSUO , MITSUYOSHI TADAHIKO , HATOU HISAMITSU , ANPO KATSUO , MADOKORO MANABU , IMAGAWA KATSUMI
IPC分类号： C04B35/113 , H01M10/39
摘要： PROBLEM TO BE SOLVED: To obtain the subject solid electrolyte highly reliable as a solid electrolyte as a constituent of sodium-sulfur cells by specifying the ratio for Li2 O and Na2 O in stock powder and also specifying the composition and crystal form of a seed crystal to be added to the stock powder. SOLUTION: This β"-alumina sintered solid electrolyte is produced by adding a seed crystal to and dispersing it in stock powder comprising Li compound powder, Na compound powder and Al compound powder followed by molding and then sintering, under the following conditions: (1) weight ratio: Li2 O/Na2 O is 0.078-0.1 in terms of oxide in the stock powder; and (2) for the seed crystal, weight ratio: Li2 O/Na2 O is 0.081-0.15, and >=50 (pref. >=80)% crystal form thereof being β"-alumina phase, and the above weight ratio being greater than that in the stock powder. This β"-alumina sintered compact is 1.5-2.5 Ωcm in resistivity at 330 deg.C and 250-350 MPa in radial crushing strength.

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