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1. 发明专利

JPS5989520A SHORTCIRCUIT PROTECTING CIRCUIT 失效
公开(公告)号：JPS5989520A
公开(公告)日：1984-05-23
申请号：JP19893682
申请日：1982-11-15
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOIZUMI HIROYUKI , MAEDA TAKEO
IPC分类号： H02H7/122 , H02M7/537

2. 发明专利

JPH01191280A KANJI RECOGNIZING SYSTEM 失效
公开(公告)号：JPH01191280A
公开(公告)日：1989-08-01
申请号：JP1442288
申请日：1988-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SHIMA KIYOYA , SAITO HIDETOSHI , ISHIKAWA KIYOSHI , MIZUNIWA YOSHIHIRO , MAEDA TAKEO , SAKATA MASATERU
IPC分类号： G06K7/10
摘要： PURPOSE:To correctly recognize a KANJI (Chinese character) in a short time by alternately disposing black points and white points on the upper side and the left side of an information element, disposing the white points on a lower side and a right side and reading a code on which a point representing information is disposed by an image scanner. CONSTITUTION:In order to obtain the entry position of the information element, the positions Xa, Ya,...Xd, Yd of the points (a), (b), (c), (d) of the four corners of an external frame are obtained to obtain the coordinates of the points 11, 12, 21, 22 of the reference of four bits. The widths of the external frame are respectively subtracted from the distance of the X axis direction of the point (a) and the point (c), and the point (b) and the point (d) and averaged to have the length of the X axis direction occupied by a piece of information and they are two columns, so that they are divided equally into two to obtain the width Xs of the piece of information. On a Y axis, Ys is similarly obtained. The width of the information obtained in such a way is added to the coordinate Xa, Ya of an origin, thereby, the coordinate of the reference of the information is obtained. However, when the number of the bits of a the information element is increased, the position detecting error of the information element is increased. Then, as one part of the external frame, the black points and the white points are alternately disposed to measure the position of the black points, thereby, more correctly obtaining the position of the information.

3. 发明专利

JPH01191279A KANJI RECOGNITION SYSTEM 失效
公开(公告)号：JPH01191279A
公开(公告)日：1989-08-01
申请号：JP1442188
申请日：1988-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SHIMA KIYOYA , SAITO HIDETOSHI , ISHIKAWA KIYOSHI , MIZUNIWA YOSHIHIRO , MAEDA TAKEO , SAKATA MASATERU
IPC分类号： G06K7/10
摘要： PURPOSE:To recognize a KANJI (Chinese character) code at high speed by a short program by encoding a KANJI and directly recognizing. CONSTITUTION:The points of the four corners of the code are respectively defined to be (c), (d), (e), (f). The 1, 2, 23, 24 rows and 1, 2, 23, 24 columns of a picture element are frames and black. 3-7 rows indicate the information of 4 bits (0100) for representing a numeric character 2. Since the 3-7 rows have the least significant bit of 0, they are white, since 8-12 columns show the numeric character of 1, they are black, and since 13-17 columns and 18-22 columns show 0, they are white. Since 8-12 columns show the numeric character of 0, 13-17 columns show 3 and 18-22 columns show 3, the JIS code 2033 of the character of KAN (Chinese) is represented. Then, the code is inputted to a computer by an image scanner to detect the coordinates of the four corners of the frame, calculate the position of respective information bits from the values, decide 1 or 0 according to that there are many white points or black points at a relevant position and read the numeric character represent one KANJI.

4. 发明专利

JPS6281149A DOCUMENT PROCESSING DEVICE HAVING COMMUNICATION FUNCTION 失效
公开(公告)号：JPS6281149A
公开(公告)日：1987-04-14
申请号：JP22008885
申请日：1985-10-04
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ASAI NOBUTERU , NAGASHIMA YUKIMI , MAEDA TAKEO
IPC分类号： H04L29/06 , G06F5/00 , G06F13/00 , G06F17/21 , H04L13/00
摘要： PURPOSE:To communicate all document data formed by a document processing function section by identifying a document processing function of the document processing function section of a communication party and transmitting/receiving the document data in the unique document form or code system when the opposite device has the same kind of the document processing function. CONSTITUTION:At the establishing processing of a session executed ahead the reception of a document data, whether or not the opposite party has the same kind of the document processing function is discriminated and the result is stored as a part of a reception management data. In the reception processing, the line is connected to the opposite telex equipment and a reception data is stored in a floppy disc stored in an FDD 27 through an NCU MODEM 304, a communication controller 303, a communication program memory 306 and a floppy disc controller 307. When the opposite device has the same kind of document processing function, the generated document data is transmitted/received in the unique document form or code system without any modification, and when the opposite device has a different kind of the document processing function, the document form or code system is changed to attain a free data communication.

5. 发明专利

JPS58130791A DRIVE DEVICE FOR MOTOR 失效
公开(公告)号：JPS58130791A
公开(公告)日：1983-08-04
申请号：JP1005682
申请日：1982-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO , UMETSU HIDEYASU , TAKAHASHI NORIYOSHI
IPC分类号： H02P27/06 , H02P21/04 , H02P21/18 , H02P21/22 , H02P21/24 , H02P21/34 , H02P21/36 , H02P23/03 , H02P23/16
摘要： PURPOSE:To prevent the operation of a drive device for a motor from becoming unstable by providing an upper limit of duty by a control arithmetic circuit and stopping the counting of the rotating speed when it exceeds the upper limit of the set duty. CONSTITUTION:A controller for frequency converter has a control circuit 23 which includes an arithmetic memory. This control circuit 23 stops the output of the converter by the rotating speed count command from a rotating speed measurement instructing circuit 26 and calculates the rotating speed from the induced voltage of a motor 5, and the result is temporarily stored in the memory. The upper limit of the duty is provided in the control circuit 23, and when it exceeds the upper limit of the set duty, the measurement and calculation of the rotating speed are stopped.

6. 发明专利

JPS5787626A DRIVING CIRCUIT FOR SELF-DISTINGUISHING TYPE SWITCH ELEMENT 失效
公开(公告)号：JPS5787626A
公开(公告)日：1982-06-01
申请号：JP16335480
申请日：1980-11-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO
IPC分类号： H02M1/06 , H03K17/73 , H03K17/732
摘要： PURPOSE:To increase the interrupting ability of a main switch element, by detecting that the current of the main switch element is abnormally greater and superposing a voltage of a capacitor which waits for charging in advance on an off-gate voltage. CONSTITUTION:Switches 3, 3' turn on, a power supply 1 is applied between the gate and cathode of a switch element 30 and it is triggered. In this case, a capacitor 13 is charged via a diode 12. If the current of the switch element 30 is abnormally greater and it is required to increase the interrupting capability, a switch 11 is triggered in synchronizing with switches 4, 4' for turning off. Then, power supply 1 and the capacitor 13 are connected in series and the voltages are applied between the cathode and gate of the switch element 30, allowing to turn off the switch element 30 surely.

7. 发明专利

JPS62245320A WORD PROCESSOR 失效
公开(公告)号：JPS62245320A
公开(公告)日：1987-10-26
申请号：JP8720886
申请日：1986-04-17
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA ISAO , MATSUOKA SHIGERU , MAEDA TAKEO , NAGASHIMA YUKIMI , NAKAJIMA HAJIME
IPC分类号： G06F1/16 , B41J5/30 , B41J13/00 , B41J13/10 , B41J15/04 , B41J21/00 , B41J29/42 , B41J29/52 , G06F1/00 , G06F3/12 , G06F17/21
摘要： PURPOSE:To miniaturize the whole of a product, by mounting a display device turnably so that the screen of the display device is brought down keeping face to face with the upper plane of a printing device. CONSTITUTION:A word processor unit in which an upper case 1 and a lower case 2 are provided, is constituted of a keyboard 3 as an input device, a controller which processes a signal from the keyboard, a printing device 5, and a display device 6. At such a time, the display device 6 is mounted turnably in the rearward of the printing device 5, and when the word processor is used, the screen 18 of the display device 6 is positioned in the rearward of the printing device 5, and face to face with an operator. Furthermore, the picture plane 18 of the display device 6 is shared as the paper supplying guide of a sheet of printing paper, and a function to display a form setting position to the printing device 5 is provided on the screen 18 of the display device 6. In this way, it is possible to perform the position alignment of a paper easily prior to the start of a printing.

8. 发明专利

JPS6249744A TELETEX EQUIPMENT 失效
公开(公告)号：JPS6249744A
公开(公告)日：1987-03-04
申请号：JP18835985
申请日：1985-08-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ASAI NOBUTERU , NAGASHIMA YUKIMI , MAEDA TAKEO
IPC分类号： H04L29/12 , G06F13/00 , G06F17/21 , H04L13/00 , H04L29/00 , H04M11/00
摘要： PURPOSE:To make communication with an external equipment without impeding a document processing function, by providing a magnetic recording device which stores a system program for communication and communicating document data. CONSTITUTION:When a power source 260 is turned on, the host CPU 251 of a main body controlling section 25 shifts a system program stored in a floppy disk set in an FDD 24 to a program memory 253 in accordance with the program of a boot ROM 252 and starts the operation of a word processor. On the other hand, a communication device 28 also shifts a system program stored in a floppy disk set in another FDD 27 to another program memory 306 in accordance with the program of another boot ROM 302 and executes a communication function.

9. 发明专利

JPS58130794A VARIABLE SPEED DRIVE DEVICE FOR MOTOR 失效
公开(公告)号：JPS58130794A
公开(公告)日：1983-08-04
申请号：JP1005582
申请日：1982-01-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAEDA TAKEO , UMETSU HIDEYASU , TAKAHASHI NORIYOSHI
IPC分类号： H02P27/06 , H02P5/46
摘要： PURPOSE:To measure the rotating speed of a motor with a simple structure by calculating the rotating speed of the motor from the induced voltage presented at the terminal of the motor during the stopping period of a power inverter. CONSTITUTION:Drive devices which are respectively formed of power reactors 21-19, filters 31-39, power inverters 41-19 are provided by 1:1 at many motors 51-59. The drive devices respectively have controllers 71-79. To measure the rotating speeds, the operations of the inverters 41-49 are stopped, the induced voltages of the motors are respectively detected by detectors 61-69, and are inputted to the controllers 71-79, which respectively calculate by the induced voltages the rotating speeds of the motors 51-59.

10. 发明专利

JPS59148559A Drive circuit for semiconductor switching element 失效
标题翻译：用于半导体开关元件的驱动电路
公开(公告)号：JPS59148559A
公开(公告)日：1984-08-25
申请号：JP2159983
申请日：1983-02-14
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： MAEDA TAKEO
IPC分类号： H02M1/06 , H02M1/08
CPC分类号： H02M1/08
摘要： PURPOSE:To enable to safely supply electric power of high voltage and high frequency to a load without sacrificing the element characteristics by connecting an inductor between the connecting point of a gate turn OFF SCR and a switching transistor and the gate of the SCR. CONSTITUTION:An inductor 11 is connected between the series connecting point of a gate turn OFF SCR (GTO) 7 and a high speed switching transistor TR8 and the gate of the GTO7, and a capacitor 12 for absorbing the transient voltage is provided in parallel with the TR8. Values of the inductor 11, the capacitor 12 and the resistor 10 are selected so that the circuit of them become in non resonance mode. Since the inductor 11 is provided, a current is flowed from a gate power source through the inductor 11 and the TR8 during the ON period of the GTO7, and when an OFF signal is inputted to the TR8, the current is flowed from the cathode to the gate of the GTO7 to become the arc extinguishing current of the GTO.
摘要翻译：目的：通过在栅极关断SCR和开关晶体管的连接点与SCR的栅极之间连接电感器，可以在不牺牲元件特性的情况下，安全地向负载提供高压高频电源。构成：电感器11连接在门极关断SCR（GTO）7和高速开关晶体管TR8的串联连接点与GTO7的栅极之间，并且与电容器12并联连接，用于吸收瞬态电压 TR8。选择电感器11，电容器12和电阻器10的值，使得它们的电路变为非谐振模式。由于设置电感器11，所以在GTO7的导通期间，电流从栅极电源流过电感器11和TR8，当向TR8输入OFF信号时，电流从阴极流向 GTO7的门口成为GTO的灭弧电流。

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