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1. 发明专利

JPH09306307A VACUUM VALVE 失效
公开(公告)号：JPH09306307A
公开(公告)日：1997-11-28
申请号：JP11901096
申请日：1996-05-14
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , UCHIYAMA YOSHIMI , WATANABE KENJI , KAGENAGA YOSHIMASA , SATO JUNICHI , KANEKO EIJI , HONMA MITSUTAKA , SOMEI HIROMICHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To further improve breaking performance by preventing the concentration of an arc caused by an eddy current flowing to a contact point. SOLUTION: A material in the same plane direction as a contact plane of a contact point 11A on the front end of a coil electrode is changed. On the outermost peripheral side, it is constituted in an annular shape by arc-shaped four contact point pieces 11a1 made of a copper material and arc-shaped four contact point pieces 11b1 made of copper-chrome alloy. Even on the inside of this annular shape, small arc-shaped contact point pieces made of copper- chrome alloy are arranged on the inner peripheral side of the contact point pieces 11a1, and small arc-shaped contact point pieces made of a copper material are arranged on the inner peripheral side of the contact point pieces 11b1. Fan-shaped small contact point pieces are respectively arranged on the further inner peripheral side of these, and loop resistance of an eddy current is increased.

2. 发明专利

JPH0917297A VACUUM VALVE 失效
公开(公告)号：JPH0917297A
公开(公告)日：1997-01-17
申请号：JP10660196
申请日：1996-04-26
申请人： TOSHIBA CORP
发明人： WATANABE KENJI , UCHIYAMA YOSHIMI , SATO JUNICHI , KAGENAGA YOSHIMASA , KANEKO EIJI , HONMA MITSUTAKA , SOMEI HIROMICHI , OTOBE KIYOBUMI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To prevent the concentration of arcs generated between electrodes on the central part. SOLUTION: A coil electrode 21 is brazed to an outer circumference of the tip of a moving side current carrying axis 7. A magnetic body 31 having a U-shaped cross section is formed so as to face the opening side to an arc electrode 23 side and surround a coil part 21c at the tip of the coil electrode 21. A disk-shaped arm 32 is arranged between the bottom of the magnetic body 31 and the moving side current carrying axis 7, and the magnetic body 31 is fixed to the moving side current carrying axis 7.

3. 发明专利

JPH08264082A VACUUM VALVE AND ITS MANUFACTURE 失效
公开(公告)号：JPH08264082A
公开(公告)日：1996-10-11
申请号：JP6726595
申请日：1995-03-27
申请人： TOSHIBA CORP
发明人： HONMA MITSUTAKA , SOMEI HIROMICHI , KANEKO EIJI , WATANABE KENJI , UCHIYAMA YOSHIMI , SATO JUNICHI , KAGENAGA NOBUMASA , OKUTOMI ISAO , SEKI KEISEI
IPC分类号： H01H11/04 , H01H33/66
摘要： PURPOSE: To prevent concentration of an arc generated when contacts open apart and to stably control the arc to a diffused state. CONSTITUTION: In a vacuum valve, in which hollow ring-shaped contacts 32 are placed on the opposite surfaces of a pair of electrodes that are disc-shaped electrodes 31, hollow ring-shaped electrodes 34, 35 or cylindrical electrodes 36, reinforcing members 38, 39 are employed for the hollow electrodes if necessary. Desirably, either the bore D2 of the hollow part of a contact 32 is 10mm and more and its relation with the outside diameter D1 of the electrode 31 is 0.1×D1

4. 发明专利

JPH08111150A VACUUM CIRCUIT BREAKER 失效
公开(公告)号：JPH08111150A
公开(公告)日：1996-04-30
申请号：JP24282294
申请日：1994-10-06
申请人： TOSHIBA CORP
发明人： TAKAHASHI HIDEOMI , YOSHIDA TETSUO , KANEKO EIJI , SHIOIRI SATORU
IPC分类号： H01H33/66
摘要： PURPOSE: To improve withstand voltage characteristics, and downsize an external shape. CONSTITUTION: A conductor support part 10 is suspended from an upper end plate 4A of an insulating cylinder 1, and an upper conductor 3 of a vacuum valve 1 is supported with an under surface of this conductor support part 10. A truncated cone shaped boss part 11A is protrusively arranged in an upper part on an outside surface of the insulating cylinder 1, and a boss part 11B is similarly protrusively arranged in a lower part. An upper polar terminal 3a is penetratingly arranged on the axis of the boss part 11A, and the base end of this upper polar terminal 3a is brazed to a side surface of the upper conductor 3.

5. 发明专利

JPH06139886A VACUUM VALVE 失效
公开(公告)号：JPH06139886A
公开(公告)日：1994-05-20
申请号：JP28840692
申请日：1992-10-27
申请人： TOSHIBA CORP
发明人： WATANABE KENJI , KANEKO EIJI
IPC分类号： H01H33/66
摘要： PURPOSE:To provide a vacuum valve increasing the critical current value at an electrode to form an arc spot when the current is cut off and maintaining the excellent cutoff performance. CONSTITUTION:Contact pieces 7 at the middle section and outer periphery of a contact 5 are formed into a protruded shape toward an electrode 4 side on the contact 5 of the electrode 4 of a vacuum valve. The material of a recessed contact piece 8 at the middle section has the melting point, heat conductivity, specific heat, and density larger than those of the material of the contact piece 7.

6. 发明专利

JPH0622420A SWITCHGEAR 失效
公开(公告)号：JPH0622420A
公开(公告)日：1994-01-28
申请号：JP17248392
申请日：1992-06-30
申请人： TOSHIBA CORP
发明人： YOSHIDA TETSUO , SHIRAISHI MASAZUMI , KANEKO EIJI , MIYAGAWA MASARU , MASAKI NOBUO , NAGATA YASUFUMI
IPC分类号： H02B1/20 , H02B13/02
摘要： PURPOSE:To obtain a small switchgear which can prevent secondary accidents and the spreading of accidents, and which is easy to maintain. CONSTITUTION:Each of the high voltage main circuit apparatus for three phases is assembled into one unit with insulating resin. A metal cylinder 28 is interposed between the circuit apparatus, and the circuit apparatus are coupled with each other via a contact 26 incorporated in the cylinder 28. Silicon gel 33 is applied around this contact 26, whereby the withstand voltage characteristic of the coupling section is increased.

7. 发明专利

JPH05109349A VACUUM CIRCUIT BREAKER 失效
公开(公告)号：JPH05109349A
公开(公告)日：1993-04-30
申请号：JP26779291
申请日：1991-10-16
申请人： TOSHIBA CORP
发明人： KANEKO EIJI
IPC分类号： H01H33/66
摘要： PURPOSE:To increase the flowing current even when a sintered material, the main component of which is WC, is used for a contact part of an electrode in a method wherein either of a pair of electrodes is driven to contain a velocity component in the direction different from the turn-on direction of the electrode. CONSTITUTION:A vacuum valve 20 is composed in such a manner that both end opening parts of an insulating tube 2 are airtightly sealed by end plates 3 and 4 so as to form a vacuum container 5 followed by arranging a pair of electrodes 6 and 7 therein in such a way that they can be freely contacted with or separate from each other. Then, a driving device 26 is driven, a movable current carrying shaft 21 is upwardly moved via a link 27, etc., and subsequently when it reaches the location immediately before the electrodes 6 and 7 are brought into contact with each other, a roller 24a of an engaging body 24 provided on a supporting frame body 23 hits and contacted with a contact surface 22a of a protruded part 22 provided on shaft 21. Accordingly, since the electrode 7 moves off the electrode 6 in the sideways direction, the opposing electrode surfaces are pressed and deformed by the protrusion part resulting in the increase in the contact area. Therefore, even when sintered material the main component of which is WC (tungusten carbide) is used, flowing current can be increased.

8. 发明专利

JPH03276780A GAS LASER OSCILLATOR 失效
公开(公告)号：JPH03276780A
公开(公告)日：1991-12-06
申请号：JP7564690
申请日：1990-03-27
申请人： TOSHIBA CORP
发明人： NISHIDA KOICHI , TERAI KIYOHISA , KANEKO EIJI
IPC分类号： H01S3/038
摘要： PURPOSE:To offer a small-sized gas laser oscillator whose structure is simple and whose oscillation efficiency is high by a method wherein at least one out of paired dielectrics arranged and installed near individual discharge electrodes is formed cylindrically and its inside is coated with a metal to form a discharge electrode. CONSTITUTION:A cylindrical dielectric 11 is inserted into an outside wind tunnel 1; a second discharge electrode 13 is formed at its inside. The outside wind tunnel 1 itself can be made small; a gas laser oscillator can be made small-sized and its structure can be simplified. In addition, when the frequency of a high-frequency voltage to be applied across a first discharge electrode 6a and the second discharge electrode 13 is reduced, the reactance of an interconnection from a power supply to the electrodes is reduced and the interconnection is made easily. Since the inside of the cylindrical dielectric 11 is coated with a metal to form the second discharge electrode 13, a void is not formed between the dielectric 11 and the metal coating part. As a result, it is possible to prevent a partial electric discharge inside the void, and a uniform electric discharge can be obtained between dielectrics 7a, 11.

9. 发明专利

JPH03255687A GAS LASER DEVICE 失效
公开(公告)号：JPH03255687A
公开(公告)日：1991-11-14
申请号：JP5265990
申请日：1990-03-06
申请人： TOSHIBA CORP
发明人： TERAI KIYOHISA , NISHIDA KOICHI , KANEKO EIJI
IPC分类号： H01S3/104 , H01S3/00 , H01S3/134
摘要： PURPOSE:To obtain a gas laser device of high efficiency which can be controlled in operational state corresponding to the moisture content contained in a case by a method wherein the output signal of a moisture content detector which detects the concentration of H2O is transmitted to a control section, and a power supply is so constituted as to be controlled basing on the output signal concerned. CONSTITUTION:A moisture content detector 10 which detects the concentration of H2O contained in laser gas is provided inside a case 1. The moisture content contained in laser gas is constantly monitored by the moisture content detector 10 provided inside the case 1, and the detected data are transmitted to a control section 12 through a signal line 11. When the detected data transmitted from the moisture content detector 10 are higher than a set value that a stable discharge can be obtained, the control section 12 is so controlled as not to transmit an operation instruction to the power supply 5 considering that a gas laser device is in an abnormal state.

10. 发明专利

JPH03230437A VACUUM BREAKER 失效
公开(公告)号：JPH03230437A
公开(公告)日：1991-10-14
申请号：JP2504290
申请日：1990-02-06
申请人： TOSHIBA CORP
发明人： KANEKO EIJI , SATO TAKANARI
IPC分类号： H01H33/66 , H01H33/18
摘要： PURPOSE:To keep high reliability, and to improve current-limiting action by providing three vacuum valves on tops of a triangle, and by arranging a magnet between two tops for each, so as to form a closed circuit of a flux. CONSTITUTION:For a vacuum valve 20, a fixed side electrode 15 is larger enough than the diameter of an electrode 16 on a moving side, and vacuum valves 20A, 20B, 20C are provided on tops of a triangle, for the use in three- phase. A permanent magnet 11 is arranged between respectively adjacent two valves 20A and 20B, 20B and 20C, and 20A. The polarity of the magnet 11 is defined in such a way that a flux 12 generated by each magnet 11 passage through each electrode 15, 16 of the valves 20A, 20B, 20C, and becomes a continuous closed loop. The flux 12 orthogonally crosses a vacuum arc 13 generated between the electrodes 15 and 16, and a positive column is bent thereby. Arc voltage is thus elevated, and excellent current-limiting action can be obtained while high reliability is ensured.

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