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1. 发明专利

JPH01188442A PRODUCTION OF OPTICAL FIBER PREFORM 失效
公开(公告)号：JPH01188442A
公开(公告)日：1989-07-27
申请号：JP1090488
申请日：1988-01-22
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TAKAGI MASAHIRO , HABASAKI TOSHIMI , YOSHIDA MASANOBU , SHIOMI AKIO , YOKOTA HIROSHI
IPC分类号： G02B6/00 , C03B37/014 , C03B37/018
摘要： PURPOSE:To obtain the subject preform with extremely reduced eccentricity with a convenient device by mechanically fixing one end of a starting material, and supporting the other end with a spring to deposit fine glass particles while controlling the nonalignment of a rotating shaft and the center axis of the starting material. CONSTITUTION:The upper end of the starting material 1 is fixed to the center axis of rotation by a fixture 2. The lower end of the material 1 is supported by a jig 4 contg. a spring 3, and fixed by the resilience of the spring. A gaseous glass material, a combustible gas, a gaseous combustion improver, an inert gas, etc., are introduced into a burner 5 to deposit fine glass particles around the material 1. In this case, the material 1 is rotated, and the nonalignment of the center axis of the material 1 and the center axis of rotation can be controlled, because the lower end is lightly pressed by the resilience of the spring. As a result, an optical fiber preform with extremely reduced eccentricity can be produced by a convenient device.

2. 发明专利

JPS63100033A PRODUCTION OF OPTICAL FIBER BASE MATERIAL 失效
公开(公告)号：JPS63100033A
公开(公告)日：1988-05-02
申请号：JP24327186
申请日：1986-10-15
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU , SHIOMI AKIO , WATANABE KAZUHISA
IPC分类号： G02B6/00 , C03B20/00 , C03B37/012 , C03B37/12
摘要： PURPOSE:To prevent the generation of flaws by supplying a gas from one end of a glass tube to prevent the direct contact of a glass rod with a glass tube when the glass rod is inserted into the glass tube and the assembly is collapsed to produce the title optical fiber base material. CONSTITUTION:The glass tube 2 is set almost vertically, and a gas 6 is supplied to the lower end of the glass tube 2 at a desired flow rate from a gas feeder 5. At the same time, the glass rod 1 is slowly inserted from the upper end of the glass tube 2 while practically keeping concentricity. Consequently, as the glass rod 1 is successively inserted into the glass tube 2, the flow resistance to the gas 6 flowing through the gap between the glass rod 1 and the glass tube 2 increases, and hence the gas pressure is increased. The pressure functions to keep a uniform gap D between the glass rod 1 and the glass tube 2, and the glass rod 1 is inserted without being brought into contact with the glass tube 2. The assembly is then collapsed, and an optical fiber base material is produced.

3. 发明专利

JPS6384804A THERMAL EXPANSION ABSORPTION CHUCK 失效
公开(公告)号：JPS6384804A
公开(公告)日：1988-04-15
申请号：JP22621386
申请日：1986-09-26
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU , MIZUNO SHUNICHI , SHIOMI AKIO
IPC分类号： B23B31/20 , C03B37/018
摘要： PURPOSE:To prevent the change of a chucking condition due to thermal expansion by providing a spring for energizing a chucking claw to converge toward the inner side of a chuck for holding a glass rod and the like via the shift of a collet having a plurality of chucking claws in an axial direction. CONSTITUTION:Even when a normal temperature condition has changed to a high temperature condition and the whole of a chucked workpiece, a chuck proper 11, a collet 12 and the like has given thermal expansion, thereby forming a gap between the tapered surface 15 of a chucking claw 14 and the chuck proper 11, the chucking claw 14 is pushed upward with a thermal expansion absorption spring 16 and, therefore, a chucking condition is properly maintained. Thereafter, in transition from high temperature to low temperature, thermal expansion takes place. As a removable spring 17 on the rear end of the collet 12 tends to lower the collet 12, however, the force of the thermal expansion absorption spring 16 is released by rotating and loosening a rotary member 13. And the collet 12 is pushed downward and the chucking claw 14 expands toward the outside, thereby preventing the occurrence of an excessive chucking force.

4. 发明专利

JPS62138338A DEVICE FOR AUTOMATICALLY REMOVING DEPOSIT 失效
公开(公告)号：JPS62138338A
公开(公告)日：1987-06-22
申请号：JP27506085
申请日：1985-12-09
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA YUTAKA , YOSHIDA MASANOBU
IPC分类号： B01J19/00 , B08B9/087 , C03B37/014 , C03B37/018
摘要： PURPOSE:To obtain the titled device capable of preventing the deposition of the reaction residue in a discharge passage at all times and capable of keeping the reaction conditions in a reaction vessel constant by providing a coil scraper which makes contact with the inner wall of the reaction residue discharge passage of the reaction vessel at an obtuse angle. CONSTITUTION:The coiled scraper 12 connected to a rotating mechanism 13 is provided along the inner wall of an exhaust pipe 11 connected to the reaction vessel as a discharge passage. When the scraper 12 is rotated in the direction as shown by the arrow, the stripped deposit can be moved to the discharge side on the left in the figure, since the scraper is coiled. In addition, the cross section of the scraper 12 is made triangular to effectively scrape the deposit, and the contact angle theta with the inner wall surface of the exhaust pipe is made obtuse. Accordingly, since the edge of the scraper 12 comes in contact with the inner wall surface of the pipe 11 at an obtuse angle, the reaction residue deposited on the inner wall surface of the pipe 11 is effectively removed and successively sent out to the discharge side. The residue is further removed by suction air and then treated with a residue treating device.

5. 发明专利

JPS6040646B2 失效
公开(公告)号：JPS6040646B2
公开(公告)日：1985-09-12
申请号：JP17064380
申请日：1980-12-03
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU , SASAKI TOORU , OOTA AKIO , SASAGAWA MASAO
IPC分类号： D07B3/00 , H01B13/02

6. 发明专利

JPS60122735A DEVICE FOR SUPPLYING GASEOUS STARTING MATERIAL 失效
公开(公告)号：JPS60122735A
公开(公告)日：1985-07-01
申请号：JP22675083
申请日：1983-12-02
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TAKIMOTO HIROAKI , MIYANOCHI TETSUO , YOSHIDA MASANOBU , TSURITA TAMIO
IPC分类号： C03B8/04 , B01J4/00 , C03B20/00 , C03B37/014 , C03B37/018 , C03B37/085 , C03C17/02 , C23C16/448 , G02B6/00
摘要： PURPOSE:To replenish efficiently a liquid starting material by branching a return pipe from a main pipe between an essential starting material vessel of the liquid starting material used for a VAD process and an auxiliary starting material vessel, and providing appropriately a control valve to both pipes. CONSTITUTION:Gaseous N2 19 is forced into an auxiliary starting material vessel 9 from a pipe 10 by closing control valves 17, 22, 24, and 26 and opening control valves 16, 18, and 23, and a liquid starting material 1 is sent to an essential starting material vessel 2 through a main pipe 11. When a specified amt. is sent, the supply of the liquid starting material 1 is stopped by closing the control valves 16, 18, 23, an 24 and opening the valves 17, 22, and 26, and the liquid starting material 1 remaining in the main pipe 11 is returned to the auxiliary starting material vessel 9 through a return pipe 21. Then the liquid starting material 1 remaining between the control valve 23 and an outlet and 11b is returned to the essential starting material vessel 2 by opening the control valve 24. The amt. to be supplied coincides precisely and easily with the desired value in this way, and the supply can be carried out efficiently.

7. 发明专利

JPS5678007A METHOD OF TWISTING COMMUNICATION CABLE 失效
公开(公告)号：JPS5678007A
公开(公告)日：1981-06-26
申请号：JP17064380
申请日：1980-12-03
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU , SASAKI TOORU , OOTA AKIO , SASAGAWA MASAO
IPC分类号： D07B3/00 , H01B13/02

8. 发明专利

JPS63170234A DEVICE FOR PRODUCING OPTICAL FIBER BASE MATERIAL 失效
公开(公告)号：JPS63170234A
公开(公告)日：1988-07-14
申请号：JP14887
申请日：1987-01-06
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU
IPC分类号： G02B6/00 , C03B37/012
摘要： PURPOSE:To prevent the generation of flaws on the title optical fiber base material, by providing a core rod and a positioner for detecting the position of the rod and adjusting the position, and arranging a rod member concentrically with the center axis of a pipe member to keep an extremely narrow gap. CONSTITUTION:The device for producing an optical fiber base material is formed with the core rod 1 consisting of high-refractive index glass or a thermosoftening photoconductive material, a supporting device having the positioner for detecting the position of the rod with a detector 15 and adjusting the position of a holder 13 for holding the rod 1, the pipe member 2, and a gas feeder 5. The pipe member 2 is arranged concentrically with the center axis of the rod 1, and made of low-refractive index glass, etc. A gas 6 is supplied into the pipe by the feeder 5 from the lower end of the pipe member 2 and discharged from the upper end, and the feed rate and/or pressure of the gas are fine-adjusted by the output from the detector 15.

9. 发明专利

JPS60161346A PROCESS AND DEVICE FOR PREPARING OPTICAL FIBER PREFORM 失效
公开(公告)号：JPS60161346A
公开(公告)日：1985-08-23
申请号：JP6984
申请日：1984-01-05
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： MIYANOCHI TETSUO , YOSHIDA MASANOBU , TSURITA TAMIO , KANAMORI HIROO , SENDA KAZUNORI
IPC分类号： G02B6/00 , C03B19/14 , C03B37/014 , C03B37/018
摘要： PURPOSE:To prepare an optical fiber preform having a specified distribution of glass raw material by sensing the variation of growth at the lowermost part of a deposited particulate glass body in the horizontal direction due to an oxyhydrogen flame burner and correcting the oxyhydrogen flame burner in the horizontal direction. CONSTITUTION:Gaseous glass raw material is flame-hydrolyzed in a muffle furnace 1 by ejecting the raw material from the oxyhydrogen flame burner 2 and deposited particulate glass 4 is grown on a tip end of a supporting rod 3 which rises up with revolution to prepare a bar-shaped optical fiber preform. In this process, when the lowermost part of the deposited glass body 4 is shifted in the horizontal direction during the growth of the deposited glass body 4, the amt. of shift is sensed by the sensors 12, 13 for sensing the position in the X-axis and Y-axis. Then, a pulse motor 14 is controlled based on the sensing signal through a control board 16, and automation stages 10, 11 for shifting in X- and Y-axis direction mounting the oxyhydrogen flame burner 2 are shifted in the horizontal direction. By this way, the relative position of the lowermost part of the deposited glass body 4 to the oxyhydrogen flame burner 2 is maintained constantly, and optical fiber preform having uniform distribution of refractive index is obtd. stably.

10. 发明专利

JPS6042241A AUTOMATIC OPEN/SHUT TYPE CHUCK 失效
公开(公告)号：JPS6042241A
公开(公告)日：1985-03-06
申请号：JP14574183
申请日：1983-08-11
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： YOSHIDA MASANOBU , TSURITA TAMIO
IPC分类号： C03B37/018 , B23B31/12 , B23B31/16 , B23B31/163 , C03B37/014
摘要： PURPOSE:To enable optional gripping and opening of an object to be gripped under rotation as desired by combining a chuck body attached to a hollow spindle and an annular rotating member which can be driven and rotated separately therefrom. CONSTITUTION:An annular bushing 14 and an annular bearing metal 15 are fixed to the bottom end of a hollow spindle 13 through which an object 12 to be gripped is penetrated. An annular chuck body 18 formed radially with plural guide grooves 17 is connected via a bolt 19 to the metal 15. On the other hand, an annular rotating member 21 inscribed with a spiral screw 20 is interposed between the body 18 and the metal 15 freely rotatably with both. If a driving motor 24 is controlled in such a way that the angular speed of the member 21 changes relatively with the angular speed of the spindle 13, the member 21 rotates with respect to the metal 15 and the body 18 and gripping pawls 23 are opened and shut by meshing of the screws 20, 22 by which the body 12 under rotation is opened or gripped.

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