专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2000074753A Apparatus for detecting atmosphere in furnace 审中-公开
标题翻译：检测大气中的大气的装置
公开(公告)号：JP2000074753A
公开(公告)日：2000-03-14
申请号：JP24134698
申请日：1998-08-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANAKA SHIGERU , SUZUKI YASUTAKA , YAMADA SEIICHI , CHIBA AKIO , TAKAHASHI KEN
IPC分类号： G01K11/00 , F27B14/20 , F27B17/00 , G01N27/04 , G01N27/12
摘要： PROBLEM TO BE SOLVED: To make detectable the temp./oxygen concn. by a convenient method, without using complicated electric wirings or measuring circuits by constituting a detector for detecting signals from a specified ceramic sintered compact.
SOLUTION: E.g., 6 sheets of ceramic sintered compact 1 formed in specified dimensions, contg. zinc oxide 80 mol% or more, are adhered onto an alumina board 3 with an inorg. adhesive 2 to form the furnace atmosphere detector. The sheets of sintered compact 1 are made by sintering in the air (O concn. 20%) at temps. of 950°C, 960°C, 970°C, 980°C, 990°C, respectively. The furnace atmosphere detector is set in an electric furnace set e.g. at 970°C, the surface of each sintered compact 1 is visually seen after completion of the sintering process. In this time voids or cracks appear on the sintered compact surface at 950°C, 960°C, 970°C, and if no change appears on the sintered compact at 980°C, 990°C, the furnace temp. is lower than 980°C and higher than 970°C. When the temp. must be known at a more fine resolution, the furnace temp. can be estimated at an accuracy within about 2°C from the change of the crystal grain size.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：使可测的温度/氧浓度通过构成用于检测来自特定陶瓷烧结体的信号的检测器，通过方便的方法不使用复杂的电线或测量电路。解决方案：例如，以特定尺寸形成的6片陶瓷烧结体1， 80摩尔％以上的氧化锌用氧化铝粘合到氧化铝板3上。粘合剂2形成炉气氛检测器。烧结体1通过在空气中烧结（O浓度20％）在温度下制造。分别为950℃，960℃，970℃，980℃，990℃。炉气氛检测器设置在例如电炉中。在970℃下，烧结工序完成后，目视观察各烧结体1的表面。此时，在950℃，960℃，970℃的烧结体表面上出现空隙或裂纹，如果烧结体在980℃，990℃没有变化，则炉温度低于980℃，高于970℃。当温度必须以更精细的分辨率知道炉温。可以从晶粒尺寸的变化估计在约2℃以内的精度。

2. 发明专利

DE3688646D1 未知
公开(公告)号：DE3688646D1
公开(公告)日：1993-08-05
申请号：DE3688646
申请日：1986-10-13
申请人： HITACHI LTD
发明人： NAITOH TAKASHI , NAMEKAWA TAKASHI , YAMADA SEIICHI , OGIHARA SATORU , MORIKAWA JUICHI
IPC分类号： C03C8/24 , C22C45/04 , G11B5/10 , G11B5/105 , G11B5/127 , G11B5/147 , G11B5/235 , G11B5/133 , G11B5/23
摘要： In a magnetic head of amorphous magnetic alloy (4, 4'). The joint parts of magnetic cores (1, 1') of the magnetic head, or the joint parts and a magnetic gap part (5) are bonded with a bonding glass having a viscosity of 10 poises or less at a temperature by at least 50 DEG C lower than the crystallization temperature of the amorphous magnetic alloy, a good water resistance after sintering and a low coefficient of thermal expansion such as 100 x 10 / DEG C or less. The bonding glass contains 55 to 70% by weight of V2O5, 17 to 25% by weight of P2O5, 3 to 20% by weight of Sb2O3, 0 to 20% by weight of PbO, 0 to 15% by weight of Tl2O, and 0 to 5% by weight of Nb2O5.

3. 发明专利

DE3476907D1 IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE 未知
公开(公告)号：DE3476907D1
公开(公告)日：1989-04-06
申请号：DE3476907
申请日：1984-07-24
申请人： HITACHI LTD
发明人： TAKAHASHI KEN , JIMBOU RYUTAROU , MATSUSHITA YASUO , YAMADA SEIICHI , KOSUGI TETUO
IPC分类号： F02P7/02

4. 发明专利

DE3485961T2 未知
公开(公告)号：DE3485961T2
公开(公告)日：1993-04-01
申请号：DE3485961
申请日：1984-07-24
申请人： HITACHI LTD
发明人： TAKAHASHI KEN , JIMBOU RYUTAROU , MATSUSHITA YASUO , YAMADA SEIICHI , NAGAE HIROMITSU
IPC分类号： F02P7/02
摘要： An ignition distributor for an internal combustion engine with reduced electric discharge energy and suppressed radio noise generation comprises a rotor electrode 7 capable of rotary motion and a plurality of stationary electrodes 3 arranged substantially in a circle around the rotor electrode with an electric discharge clearance therebetween. The rotor electrode is made of a sintered mixture comprising zirconium oxide and an electroconductive inorganic compound having a specific resistance of not more than 10° Ωcm as main components.

5. 发明专利

DE3730614A1 未知
公开(公告)号：DE3730614A1
公开(公告)日：1988-03-24
申请号：DE3730614
申请日：1987-09-11
申请人： HITACHI LTD
发明人： YAMADA SEIICHI , NAITOH TAKASHI , NAMEKAWA TAKASHI , IKEGAMI AKIRA , GOTOO RYOO , NISHIYAMA TOSHIKAZU
IPC分类号： C03C3/074 , G11B5/127 , G11B5/147 , G11B5/23 , G11B5/235 , H01F3/00
摘要： The present invention relates to a magnetic head in which a magnetic metal film comprising a Co-containing amorphous alloy and a crystallizable glass of the PbO-B2O3-ZnO system as a solder glass are used. The magnetic head of the present invention has about 2 times higher recording density than the conventional one as a magnetic head for floppy disks and hard disks because an amorphous alloy is used. Since a crystallizable glass is used as the glass, there can be obtained a magnetic head having a high strength and superior humidity resistance and reliability.

6. 发明专利

BR9500483A 未知
公开(公告)号：BR9500483A
公开(公告)日：1995-10-17
申请号：BR9500483
申请日：1995-02-09
申请人： HITACHI LTD
发明人： YAMADA SEIICHI , TANAKA SHIGERU , SYOJI MORITAKA , MOTOWAKI SHIGEHISA , TAKAHASHI KEN , SHIRAKAWA SHINGO , OOWADA SHINICHI , YAMAZAKI TAKEO
IPC分类号： H01C7/112 , H01C17/00
摘要： To produce a voltage non-linear resistor, a mixture of calcinated metallic oxides is mixed with ZnO and SiO2, granulated, compacted to form the resistor and then sintered. After sintering, the formed ZnO resistor elements are heat treated, preferably in a two-step heat treating process.

7. 发明专利

DE3688646T2 未知
公开(公告)号：DE3688646T2
公开(公告)日：1993-10-07
申请号：DE3688646
申请日：1986-10-13
申请人： HITACHI LTD
发明人： NAITOH TAKASHI , NAMEKAWA TAKASHI , YAMADA SEIICHI , OGIHARA SATORU , MORIKAWA JUICHI
IPC分类号： C03C8/24 , C22C45/04 , G11B5/10 , G11B5/105 , G11B5/127 , G11B5/147 , G11B5/235 , G11B5/133 , G11B5/23
摘要： In a magnetic head of amorphous magnetic alloy (4, 4'). The joint parts of magnetic cores (1, 1') of the magnetic head, or the joint parts and a magnetic gap part (5) are bonded with a bonding glass having a viscosity of 10 poises or less at a temperature by at least 50 DEG C lower than the crystallization temperature of the amorphous magnetic alloy, a good water resistance after sintering and a low coefficient of thermal expansion such as 100 x 10 / DEG C or less. The bonding glass contains 55 to 70% by weight of V2O5, 17 to 25% by weight of P2O5, 3 to 20% by weight of Sb2O3, 0 to 20% by weight of PbO, 0 to 15% by weight of Tl2O, and 0 to 5% by weight of Nb2O5.

8. 发明专利

DE3485961D1 未知
公开(公告)号：DE3485961D1
公开(公告)日：1992-11-26
申请号：DE3485961
申请日：1984-07-24
申请人： HITACHI LTD
发明人： TAKAHASHI KEN , JIMBOU RYUTAROU , MATSUSHITA YASUO , YAMADA SEIICHI , NAGAE HIROMITSU
IPC分类号： F02P7/02
摘要： An ignition distributor for an internal combustion engine with reduced electric discharge energy and suppressed radio noise generation comprises a rotor electrode 7 capable of rotary motion and a plurality of stationary electrodes 3 arranged substantially in a circle around the rotor electrode with an electric discharge clearance therebetween. The rotor electrode is made of a sintered mixture comprising zirconium oxide and an electroconductive inorganic compound having a specific resistance of not more than 10° Ωcm as main components.

9. 发明专利

JP2001257104A NEUTRAL POINT GROUNDING RESISTOR AND GAS CIRCUIT BREAKER 失效
公开(公告)号：JP2001257104A
公开(公告)日：2001-09-21
申请号：JP2001013184
申请日：2001-01-22
申请人： HITACHI LTD
发明人： SHOJI MORITAKA , KITAMI CHIKASHI , YAMADA SEIICHI , TAKAHASHI KEN , SHIRAKAWA SHINGO , YAMAZAKI TAKEO , TANAKA SHIGERU , GENKIYO NARIHISA
IPC分类号： H01C7/00 , H01C7/02 , H01H33/16 , H01H33/70 , H02B1/16
摘要： PROBLEM TO BE SOLVED: To provide a neutral point grounding resistor and a gas circuit breaker which can be lessened in size. SOLUTION: A neutral point grounding resistor comprises a zinc oxide as a main component and an additive composed of aluminum oxide of 3.0 to 40 mol%, magnesium oxide of 2.0 to 40 mol%, silicon oxide of 0.1 to 40 mol%, and calcium oxide of 0.005 to 0.5 mol% as an integral component, or borosilicate glass which contains calcium oxide of 1.0 to 40.0 wt.%, and amounts to 0.03 to 3.0 wt.% of all the resistor is used as an additive instead of the above additive, the additive in which calcium oxide is limited in amount to 0.0043 to 0.43 wt.% of all the resistor serves as an integral component, and furthermore the resistor is formed of ceramic resistor whose temperature coefficient of electric resistance is positive. When a neutral point grounding resistor is formed of ceramic resistors of high endurance strength, necessary resistors can be lessened in number as compared with conventional resistors, so that a neutral point grounding resistor and a gas circuit breaker can be lessened in size.

10. 发明专利

JPH10203865A PRODUCTION OF CERAMIC RESISTOR 失效
公开(公告)号：JPH10203865A
公开(公告)日：1998-08-04
申请号：JP916897
申请日：1997-01-22
申请人： HITACHI LTD
发明人： SHOJI MORITAKA , KITAMI CHIKASHI , OWADA SHINICHI , YAMADA SEIICHI , TANAKA SHIGERU , TAKAHASHI KEN
IPC分类号： C04B35/453 , H01C7/10
摘要： PROBLEM TO BE SOLVED: To provide a process for producing a ceramic resistor having a uniform electrical properties and excellent tolerance in improved workability by suppressing the solidification of a slurry. SOLUTION: This process for the production of a ceramic resistor comprises the mixing of powdery materials composed mainly of zinc oxide and containing 3.0-40mol% of aluminum oxide (in terms of Al2 O3 ), 2.0-40mol% of magnesium oxide (in terms of MgO) and 0.1-1.0mol% of silicon oxide (in terms of SiO2 ), the granulation, molding and baking of the mixture and the application of an electrode on the product. Not more than 50mol% of the magnesium oxide powder is substituted with an acidic magnesium compound in the addition of the powder.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式