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1. 发明专利

JPH01199498A STRUCTURE OF ELECTRONIC EQUIPMENT HOUSING SHELF 失效
公开(公告)号：JPH01199498A
公开(公告)日：1989-08-10
申请号：JP2289688
申请日：1988-02-04
申请人： FUJITSU LTD
发明人： YAMAGATA TOSHIO , OKAMOTO ITSUO , OKA AKIRA
IPC分类号： H05K7/14
摘要： PURPOSE:To decrease components in numbers and make a printed board guide rail excellent in a positional accuracy with ease by a method wherein an extrusion molded piece provided with many rail grooves previously formed inside is cut off into two or more frame members, which are arranged in parallel with each other at a certain space between them, and an upper and a lower cover and a left right side board are fixed to two or more frame members. CONSTITUTION:A extrusion molded piece 20 with many rail grooves 10a previously formed inside it is cut off perpendicularly to the rail grooves 10a into two or more frame members 10-12, which are arranged in parallel with each other at a certain distance between them, and an upper and a lower covers 15 and 16 and a left and right side boards 13 and 14 are fixed to two or more parallel frame members 10-12. For instance, the extrusion molded piece 20 is pipe-shaped and nearly rectangular in section, which is cut off into the rectangular frames 20a. And, when the molded piece 20 is molded using aluminum or the like, many parallel rail grooves 10a are provided inside an upper and a lower frame respectively corresponding to each other at an extrusion molding. And, many air vent holes 15a and 15b are provided to the upper and the lower covers 15 and 16, and mounting metal pieces 13a which assemble a shelf to a perpendicular frame are fixed to the left and the right side boards 13 and 14.

2. 发明专利

JPS63253696A CUBICLE STRUCTURE OF ELECTRONIC EQUIPMENT UNIT 失效
公开(公告)号：JPS63253696A
公开(公告)日：1988-10-20
申请号：JP8712787
申请日：1987-04-10
申请人： FUJITSU LTD
发明人： YAMAGATA TOSHIO , OKAMOTO ITSUO , ISHIKAWA HARUO
IPC分类号： H05K7/14 , H05K7/18

3. 发明专利

JPS6367760A HEAT DISSIPATION FIN STRUCTURE WITH BUILT-IN MICRO-HEAT-PIPE 失效
公开(公告)号：JPS6367760A
公开(公告)日：1988-03-26
申请号：JP21074286
申请日：1986-09-09
申请人： FUJITSU LTD
发明人： YAMAGATA TOSHIO , OKAMOTO ITSUO
IPC分类号： F28D15/02 , H01L23/427 , H05K7/20
摘要： PURPOSE:To achieve highly efficient heat dissipation by a method wherein a heat-pipe is composed of a part which is in contact with the upper surface of an electronic device and a part which penetrates the body of a heat dissipation fin main part is built in the heat dissipation fin main part which is composed of a plurality of plate- shape fin parts provided with certain intervals and the body which links the fin parts. CONSTITUTION:The lower part of a micro heat-pipe 20 is formed into a flat spiral 21 and warped upward from the center of the spiral. If the micro heat-pipe 20 is inserted into a heat dissipation fin main part 10, the lower spiral part 21 is fitted in the opening 14 of the heat dissipation fin main part 10 and the part 22 extended upward penetrates through the hole 15 of the body 13 of the heat dissipation fin main part 10. As the spiral part 21 is directly in contact with the upper surface of an electronic device 1, it receives the heat from the electronic device 1 and the liquid in the spiral part 21 is vaporized and quickly transferred to the upper part 22. As the upper part 22 is close to fin parts 11, the part 22 is always cooled and the vaporized liquid is condensed and transferred to the lower spiral part 21 through capillaries by gravity. By repeating this cycle, highly efficient heat dissipation can be achived in a short period.

4. 发明专利

JPS5921098A Communication equipment containing trestle structure 失效
标题翻译：包含TRESTLE结构的通讯设备
公开(公告)号：JPS5921098A
公开(公告)日：1984-02-02
申请号：JP12964282
申请日：1982-07-27
申请人： Fujitsu Ltd
发明人： ZENITANI HIDEKI , OKA AKIRA , OKAMOTO ITSUO , HAYASHI HISAO , TANIGUCHI SHIYOUJIROU
IPC分类号： H05K7/02 , H05K7/18

5. 发明专利

JPS5831713B2 失效
公开(公告)号：JPS5831713B2
公开(公告)日：1983-07-07
申请号：JP15389581
申请日：1981-09-30
申请人： FUJITSU LTD
发明人： OKAMOTO ITSUO , MATSUI KYOSHI , SAKURAI ISAO , ARAI KATSUSHI
IPC分类号： H01R24/00 , H05K7/20

6. 发明专利

JPS58108798A MEASURING JACK STRUCTURE FOR COMMUNICATION CHANNEL DEVICE CONTAINING APPARATUS 失效
公开(公告)号：JPS58108798A
公开(公告)日：1983-06-28
申请号：JP18611681
申请日：1981-11-21
申请人： FUJITSU LTD
发明人： SUGANO TAKU , OKA AKIRA , OKAMOTO ITSUO , OGURO SHINJI , MIZUSHIMA KOUJI
IPC分类号： H05K7/02 , H05K7/20

7. 发明专利

JPS5618320A SWITCH WITH SLIDE ROD 失效
公开(公告)号：JPS5618320A
公开(公告)日：1981-02-21
申请号：JP9328279
申请日：1979-07-24
申请人： FUJITSU LTD
发明人： YAMAGATA TOSHIO , KOUNO MICHIO , YAMAJI HIROSHI , SATOU TAKASHI , TAKAHASHI TSUTOMU , OKAMOTO ITSUO
IPC分类号： H01H23/02 , H01H23/16

8. 发明专利

JPS52139448A PREPARATION OF CORD CONNECTING PART FOR OPTICAL FIBER 失效
公开(公告)号：JPS52139448A
公开(公告)日：1977-11-21
申请号：JP5602876
申请日：1976-05-18
申请人： FUJITSU LTD
发明人： OKA AKIRA , OKAMOTO ITSUO , MURAI HITOSHI
IPC分类号： G02B6/38 , G02B6/40 , H01B11/00 , H01P3/00 , H02G15/08
摘要： PURPOSE:To provide a method for preparing cord connecting part for optical fiber, in which fiber cores are arranged at equal intervals on one straight line by inserting fiber cores into plural cone-shaped bores in metallic part material to be fixed therein.

9. 发明专利

JPS5211947A ECCENTRICITY MEASURING METHOD 失效
公开(公告)号：JPS5211947A
公开(公告)日：1977-01-29
申请号：JP8867175
申请日：1975-07-18
申请人： FUJITSU LTD
发明人： OKA AKIRA , OKAMOTO ITSUO , MURAI HITOSHI , FURUTA YOUSUKE , KUWABARA HIDEO , MATSUI KIYOSHI
IPC分类号： G01M11/00 , G01B11/00 , G02B6/00
摘要： PURPOSE:To measure an eccentric volume in a hole by observing the difference between the mark established into the center of the transparent board and the pattern of concentric circle.

10. 发明专利

JPH1028020A AMPLIFIER CIRCUIT AND MULTISTAGE AMPLIFIER CIRCUIT 失效
公开(公告)号：JPH1028020A
公开(公告)日：1998-01-27
申请号：JP18291596
申请日：1996-07-12
申请人： FUJITSU LTD
发明人： KAWAI TAKAHISA , OKAMOTO ITSUO
IPC分类号： H03F3/68 , H03F1/30 , H03F3/04 , H03F3/193 , H03F3/24 , H03G1/00
摘要： PROBLEM TO BE SOLVED: To provide an amplifier circuit using an FET, for example, an MESFET which does not require any negative power source when te MESFET has a positive power source and, at the same time, can largely attenuate the input signals when the signals are to be attenuated largely by making the variable width of the gain larger. SOLUTION: An amplifier circuit is provided with an E MESFET 46 which controls the drain voltage of another E MESFET 45 constituting an amplifier element in addition to the MESFET 45 and the drain voltage VDD3 of the MESFET 45, the characteristics of the MESFET 46, and the resistance of resistors 50-52 are decided so that the drain voltage and gate bias of the MESFET 45 can respectively change to 4-0V and about 0.4-0V correspondingly to the variation of a gate bias control voltage control 1.

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