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

JPS57138600A METHOD OF CUTTING AND WORKING HOLLOW ARTICLE 失效
公开(公告)号：JPS57138600A
公开(公告)日：1982-08-26
申请号：JP2305381
申请日：1981-02-20
申请人： HITACHI LTD
发明人： SASAKI HIROHARU , SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , KAWAKUBO YUKIO , IKEMOTO NORIO
IPC分类号： B23K26/38 , B26F3/06

2. 发明专利

JPS5530817A GAS LASER GENERATING DEVICE 失效
公开(公告)号：JPS5530817A
公开(公告)日：1980-03-04
申请号：JP10289378
申请日：1978-08-25
申请人： HITACHI LTD
发明人： KUWABARA SHIYOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： H01S3/036 , H01S3/038 , H01S3/097
摘要： PURPOSE:To throttle glow discharge by surrounding gas flow and generate high efficiency gas laser by providing plural holes on the outside of a gas flow passage provided to a cathode. CONSTITUTION:At the end of the inclined surface 12 of a discharge tube 11 having an anode 10, a cathode 13 is arranged being contacted to said end. Plural holes 15 are made around a gas flow passage 14 in the center of this cathode 13. On the surface from the outer surface 13A of the cathode 13 to the holes 15 and on the surface from the holes 15 to the gas flow passage 14, an insulatting film 16 is coated, but on the cathode surface 14 facing the gas flow passage 14, the insulating film is not provided. By so doing, if gas medium 21 is flowed in the direction of the arrow mark in the state of emitting glow discharge 20, the gas medium 21A passed through the holes 15 surrounds all around the glow discharge 20 and flows along the inclined surface 12 to the glow discharge side, therefore, the glow discharge is throttled by the gas flow and high efficiency laser output is obtained.

3. 发明专利

JPS5642392A DISCHARGE OF GAS LASER DEVICE 失效
公开(公告)号：JPS5642392A
公开(公告)日：1981-04-20
申请号：JP11795279
申请日：1979-09-17
申请人： HITACHI LTD
发明人： TAKEMORI SEI , SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/097 , H01S3/0977
摘要： PURPOSE:To contrive the high speed of discharging pulse glow and to reduce the withstand voltage of a switching circuit in the gas laser device by retaining continuous glow discharge with an electric input less than threshold and executing pulse glow discharge as superimposed with this glow discharge. CONSTITUTION:An anode 7, a cathode 8 and trigger electrode 10 are contained in a laser tube 1 filled with laser medium therein. A power supply circuit having a DC high voltage power supply 4, a switching circuit 5 and a discharge stabilizing ballast resistor 6 connected in series with each other is connected between the anode 7 and the cathode 8, the power supply 4 and the circuit 4 are operated, and a voltage is applied between the anode 7 and the cathode 8, and a glow discharge is generated between the cathode 8 and the electrode 10. Then, a glow discharge is generated between the anode 7 and the cathode 8 by the discharge trigger operation, the laser tube 1 is excited therein, and the laser light 11 is irradiated through a concave reflecting mirror 2 and a plane output mirror 3. The circuit 5 is operated in this operation, a pulse glow discharge 13 is executed as superimposed with the continuous glow discharge 12, and the withstand voltage of the circuit 5 is reduced.

4. 发明专利

JPS5480099A LASER DEVICE 失效
公开(公告)号：JPS5480099A
公开(公告)日：1979-06-26
申请号：JP14713577
申请日：1977-12-09
申请人： HITACHI LTD
发明人： SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/097 , H01S3/0971 , H01S3/104
摘要： PURPOSE:To better the gas circulation without increasing the blower capacity and thus to increase the cooling efficiency by providing the switch which performs the control so that the other electrode may not discharge while one of the two electrodes discharges. CONSTITUTION:Discharge tube 1 and 2 discharge the laser beam generated through excitation of gas 13 filled inside, along with the discharge through electrode 6 and 7 provided at the both ends of the discharge tube. At the same time, cooling path 23 is provided to circulate gas 13 from part of the discharge tube in which both electrodes correspond to each other through the both ends of the discharge tube. Then a switch is provided to the electrode to give control so that the other electtrode may not discharge while one of the both electrodes is discharging. As a result, the gas circulation can be improved without increasing the capacity of blower 12, thus increasing the cooling efficiency.

5. 发明专利

JPS52122094A ELECTRODE FOR PERMANENT CURRENT SWITCH 失效
公开(公告)号：JPS52122094A
公开(公告)日：1977-10-13
申请号：JP3821976
申请日：1976-04-07
申请人： HITACHI LTD
发明人： KUWABARA SHIYOUJI , SUZUKI KOUJI , TADA NAOFUMI
IPC分类号： H01L39/14 , H01L39/00
摘要： PURPOSE:To obtain the electrode part materials to open and close in the full vacuum where the gap don't occure between the both parts materials even by heating by processing with pulling out after screwing and inserting the ultra-conductive part materials where the surface is uneven into the hollow highly pure metalic part materials where similarly the inside surface is uneven.

6. 发明专利

JPS5717802A CENTER POSITION DETECTING DEVICE FOR LASER BEAM 失效
公开(公告)号：JPS5717802A
公开(公告)日：1982-01-29
申请号：JP9271980
申请日：1980-07-09
申请人： HITACHI LTD
发明人： SHIROKURA TOSHIJI , SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SASAKI HIROHARU , YOSHIOKA YOSHIO
IPC分类号： G01B11/00 , B23K26/00 , G01B11/27 , G01C15/00
摘要： PURPOSE:To always monitor the position of laser beam by constituting a bridge by 2 thin lines and 2 resistors and detecting balance of bridge with the use of variation of resistors by irradiation of the laser beam for working the material to be worked on these thin lines. CONSTITUTION:A bridge consists of thin lines 14a and 14b, and resistors 15a and 15b. Output of bridge is taken out from an amplifier 16. These two thin lines 14a and 14b are located in parallel and laser beam 3 is made incident to these thin lines 14a and 14b. When thin lines 14a and 14b are located in the symmetrical position to the center position of the laser beam 3, output of the amplifier 16 becomes 0, and when laser beam 3 is slided in horizontal direction, output is generated from the amplifier 16.

7. 发明专利

JPS56131981A CO2 GAS LASER DEVICE 失效
公开(公告)号：JPS56131981A
公开(公告)日：1981-10-15
申请号：JP3408280
申请日：1980-03-19
申请人： HITACHI LTD
发明人： KUWABARA SHIYOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： H01S3/097 , H01S3/036 , H01S3/22
摘要： PURPOSE:To obtain a stable laser output constantly by a method wherein the CO content in laser beams is set in desired limits after the passage of the beams through a catalyst part irrespective of the volume of injection power of glow discharge. CONSTITUTION:A laser medium 2 containing CO2 gas is filled up in a discharge tube 1. Glow discharge 5 is generated between electrodes 3 and 4, thereby CO2 is excited and laser beams 6 are generated. The laser beams 6 are reflected between mirrors 7 and 8 and a part thereby is taken out to the outside through the intermediary of the mirror 8. The laser medium 2 is cooled by a heat exchanger 10 located in a circulation channel 9 and CO and O2 are combined at a catalyst 12. The 1st region 12A of the honeycomb-shaped catalyst 12 prepared by impregnating Al2O3 with Pt is heated by a heater so as to be kept at the temperature at which the oxidation characteristic of CO shows saturation, while the 2nd region 12B thereof is kept at the temperature at which CO is not oxidized nearly at all. Since the CO content in the laser medium after passage thereof through the catalyst part can be controlled to take a desired value by changing the area ratio between the 1st and 2nd regions, the laser output can be stabilized.

8. 发明专利

JPS5641088A MONITORING DEVICE FOR LASER LIGHT AXIS 失效
公开(公告)号：JPS5641088A
公开(公告)日：1981-04-17
申请号：JP11619579
申请日：1979-09-12
申请人： HITACHI LTD
发明人： KUWABARA SHIYOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： B23K26/02 , B23K26/03 , G02B27/62
摘要： PURPOSE:To monitor the irradiated position and the laser light axis at all times and to enable quick processing, by constituting the intermediate reflection mirror irradiated with light between the laser oscillator and laser light and light diffractive external reflection mirror, with the laser light through-hole and the light reflection section at the external circumference. CONSTITUTION:The light 11 from the light generator 13 is fed to the laser oscillator 1 at the refleftion section 23 of the intermediate reflection mirror 22 via the beam splitter 21. Next, the light 11 is reflected at the full reflector mirror 3, it overlapped with the optical path of the laser light 6 from the oscillator 1 and it is diffractive downward at the right angle at the external reflection mirror 7 through the hole 24. Further, it is narrowed with the focus lens 8 so that the laser light 6 and the light 11 can irradiate the object to be processed 9 at all times. Accordingly, this light 11 irradiation point can be given to the processing part.

9. 发明专利

JPS554957A GAS TYPE LASER BEAM GENERATOR 失效
公开(公告)号：JPS554957A
公开(公告)日：1980-01-14
申请号：JP7748878
申请日：1978-06-28
申请人： HITACHI LTD
发明人： KUWABARA SHIYOUJI , SUGAWARA HIROYUKI , SHIROKURA TOSHIJI , SASAKI HIROHARU , TAKEMORI SEI
IPC分类号： H01S3/038 , H01S3/036 , H01S3/04 , H01S3/041 , H01S3/097 , H01S3/0977
摘要： PURPOSE:For reducing the whole structure of this system, to generate partial discharge between the third electrode provided in the vicinity of a cathode and said cathode so that no high voltage may be impressed between the cathodes of a plurality of discharge tubes. CONSTITUTION:Third electrodes 20A and 20B are provided in the vicinity of the cathodes of first and second discharge tubes 2A and 2B, and connected to the + side terminal of a DC power source 12 through the medium of a high-resistor 21 by means of an electric wire 22. Immediately after the start of the discharge of said discharge tube 2A which has made the first discharge after starting, said discharge tube 2B does not start main discharge, but partial discharge is generated between a cathode 4B and an electrode 20B. Therefore, the voltage between cathodes 4A and 4B does not become excessive since the voltage of said cathode 4B is lower than that generated by a DC power source 13. Consequently, the insulation distance l between insulating tubes 5A and 5B can be decreased. If said third electrodes 20A and 20B are installed on the flow lower gas flow course side of said cathodes 4A and 4B, good results can be obtained since charge particles easily reach anode side.

10. 发明专利

JPS5478098A LASER EQUIPMENT OF GAS FLOW TYPE 失效
公开(公告)号：JPS5478098A
公开(公告)日：1979-06-21
申请号：JP14501077
申请日：1977-12-05
申请人： HITACHI LTD
发明人： SUGAWARA HIROYUKI , KUWABARA SHIYOUJI , SHIROKURA TOSHIJI , SASAKI HIROHARU
IPC分类号： H01S3/097 , H01S3/036
摘要： PURPOSE:To miniaturize a laser equipment and improve its total effeciency by arranging discharge pipes in two lines and by making discharge pipes shift in position from the center shaft corresponding to discharge mouths of blowers. CONSTITUTION:Four discharge pipes 1a and 1b at one side and 2a and 2b at the other side are arrayed in two lines. In discharge pipes, gas increasing in temperature through discharging is circulated by the corresponding 1st centrifugal blower 6a or 2nd centrifugal blower 6b and then cooled by 1st heat exchanger 7a or 2nd heat exchanger 7b. Two blowers 6a and 6b are arranged facing each other and discharge mouths 10 of 1st blower 6a and 2nd blower 6b are connected to insulating cylinders 9a and 9b respectively and separately. In addition, since discharge mouth 10 shift from center shafts 11 of blowers respectively, 1st and 2nd blowers can be arranged, facing each other, between two columns of discharge pipes, and the positions of discharge pipes are made to shift from center shafts and to correspond to shifts of discharge mouths. Consequently, the equipment can be miniaturized and the total efficiency of it can be also improved.

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