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1. 发明授权

EP0235395B1 Magnetic head 失效
公开(公告)号：EP0235395B1
公开(公告)日：1991-06-05
申请号：EP86118175.8
申请日：1986-12-31
申请人： HITACHI, LTD.
发明人： Kumasaka, Noriyuki , Otomo, Shigekazu , Yamashita, Takeo , Zama, Hideo , Morikawa, Juichi
IPC分类号： G11B5/235 , G11B5/23 , G11B5/193
CPC分类号： G11B5/21 , G11B5/187

2. 发明授权

EP0242861B1 Magnetic head 失效
公开(公告)号：EP0242861B1
公开(公告)日：1993-07-14
申请号：EP87105879.8
申请日：1987-04-22
申请人： HITACHI, LTD.
发明人： Abe, Mitsuo , Konishi, Katsuo , Ohshima,Isao , Kawano, Kanji , Sasaki, Takumi , Zama, Hideo
IPC分类号： G11B5/31 , G11B5/187
CPC分类号： G11B5/187 , G11B5/3176

3. 发明公开

EP0275041A3 Multiplex magnetic recording and reproducing apparatus of the rotary head type 失效
标题翻译：旋转头类型的多重磁记录和再现装置
公开(公告)号：EP0275041A3
公开(公告)日：1990-03-28
申请号：EP88100166.3
申请日：1988-01-08
申请人： HITACHI, LTD. , HITACHI VIDEO ENGINEERING, INC.
发明人： Kobayashi, Masaharu , Arai, Takao , Yumde, Yasufumi , Uto, Kazuo , Amada, Nobutaka , Toeda, Hiroshi , Zama, Hideo , Masuda, Michio
IPC分类号： G11B20/10 , G11B5/008 , G11B20/22 , G11B20/06
CPC分类号： G11B5/0086 , G11B5/00878 , G11B5/02 , G11B20/10527 , H04N5/78213 , H04N9/7921 , H04N9/802
摘要： In a helical scan type magnetic recording and reproducing apparatus using rotary heads, magnetic heads (22a and 22b) for FM audio signals, magnetic heads (23a and 23b) for PCM audio signals, and magnetic heads (24a and 24b) for a video signal are arranged on a cylinder, respectively. The FM audio magnetic heads (22a and 22b), the PCM audio magnetic heads (23a and 23b), and the video signal magnetic heads (24a and 24b) have mutually different azimuth angles, respectively. The FM audio signals are first recorded in a deep layer (39) of a magnetic tape (26) by the FM audio heads, the digital modulation signals of the PCM audio signals are then recorded in an intermediate layer (40) by the PCM audio heads, and the video signal is finally recorded in a surface layer (41) by the video signal heads. Upon recording, the FM carrier frequency of the audio signals and the digital modulation carrier frequency of the PCM audio signals are set to frequencies lower than the frequency band of the FM luminance signal in the video signal. The Offset Quadrature Differential Phase-Shift Keying (O-QDPSK) modulation is used as a method of digitally modulating the PCM audio signals.

4. 发明公开

EP0242861A2 Magnetic head 失效
标题翻译： Magnetkopf。
公开(公告)号：EP0242861A2
公开(公告)日：1987-10-28
申请号：EP87105879.8
申请日：1987-04-22
申请人： HITACHI, LTD.
发明人： Abe, Mitsuo , Konishi, Katsuo , Ohshima,Isao , Kawano, Kanji , Sasaki, Takumi , Zama, Hideo
IPC分类号： G11B5/31 , G11B5/187
CPC分类号： G11B5/187 , G11B5/3176
摘要： A magnetic head (10) comprising a pair of magnetic cores (12, 12') of magnetic thin films which are sandwiched by a pair of non-magnetic substrates (11, 11'), in which the magnetic cores are limitedly formed in the neighborhood of a winding window (14) provided in at least one of the non-magnetic substrates.
摘要翻译：一种磁头（10），包括由一对非磁性基板（11,11分钟）夹持的磁性薄膜的一对磁芯（12,12分钟），其中磁芯被有限地形成在设置在至少一个非磁性基板上的绕组窗口（14）的附近。

5. 发明公开

EP0235395A1 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0235395A1
公开(公告)日：1987-09-09
申请号：EP86118175.8
申请日：1986-12-31
申请人： HITACHI, LTD.
发明人： Kumasaka, Noriyuki , Otomo, Shigekazu , Yamashita, Takeo , Zama, Hideo , Morikawa, Juichi
IPC分类号： G11B5/235 , G11B5/23 , G11B5/193
CPC分类号： G11B5/21 , G11B5/187
摘要： In a magnetic head employing a metallic ferromagnetic material (32) for portions defining a transducing gap, an oxide film (33) or carbide film (33) and a nonmagnetic metal film (34) are provided in this order on each of track width narrowing grooves, and glass (35) is packed on the nonmagnetic metal film, thereby to prevent the deterioriations of magnetic characteristics ascribable to the reaction between the metallic ferromagnetic material and the glass (35) and the production of bubbles ascribable to the reaction between the protective films and the glass, and to achieve the enhancements of recording and reproducing characteristics, the prevention of damages to a recording medium surface, the increase of a head lifetime and the rise of the available percentage of manufacture of the heads. When a glass film is further provided on the nonmagnetic metal film and the glass (35) is packed thereon, more excellent effects are achieved.
摘要翻译：在用于限定换能间隙的部分的采用金属铁磁材料（32）的磁头中，氧化膜（33）或碳化物膜（33）和非磁性金属膜（34）依次设置在每个磁道宽度变窄凹槽和玻璃（35）填充在非磁性金属膜上，由此防止归因于金属铁磁材料和玻璃（35）之间的反应的磁特性的恶化以及由于保护层薄膜和玻璃，并且实现记录和再现特性的提高，防止对记录介质表面的损害，磁头寿命的增加以及磁头制造的可用百分比的提高。当在非磁性金属膜上进一步提供玻璃膜并且玻璃（35）被填充在其上时，获得更优异的效果。

6. 发明授权

EP0718825B1 Video signal recording apparatus and video signal recording and reproducing apparatus 失效
标题翻译：一种视频记录和再现装置
公开(公告)号：EP0718825B1
公开(公告)日：2001-03-14
申请号：EP95119989.2
申请日：1995-12-18
申请人： Hitachi, Ltd.
发明人： Amada, Nobutaka , Owashi, Hitoaki , Noguchi, Takaharu , Kumasaka, Noriyuki , Zama, Hideo
IPC分类号： G11B5/008 , G11B15/12 , G11B15/18 , G11B15/467 , G11B15/02 , H04N5/782 , H04N9/79
CPC分类号： H04N5/78213 , G11B5/0086 , G11B5/00878 , G11B15/02 , G11B15/125 , G11B15/1875 , G11B15/4671 , G11B15/4672 , G11B15/4731 , H04N5/78266 , H04N9/7921 , H04N9/8042 , H04N9/83

7. 发明公开

EP0393582A2 Rotary magnetic head device and rotary transformer used therefor 失效
标题翻译： Rotierende Magnetkopf-Vorrichtung unddafürverwendeter rotierender Transformer。
公开(公告)号：EP0393582A2
公开(公告)日：1990-10-24
申请号：EP90107254.6
申请日：1990-04-17
申请人： HITACHI, LTD.
发明人： Ohji, Toshio , Morikawa, Juichi , Zama, Hideo
IPC分类号： G11B5/53
CPC分类号： G11B5/53 , H01F38/18
摘要： A pair of throughholes (101a, 101b), through which the starting extremity (107a) and the ending extremity (107b) of each of coil conductors (107) disposed on the rotor core (104) and the stator core constituting the rotary transformer are led to the respective rear surfaces, are linked by a linking slit (120). Or one throughhole (501), through which both the starting extremity (507a) and the ending extremity (507b) of each of the coil conductors (507) are led, is divided into two throughhoes (501a, 501b) by the disposing a non-magnetic partitioning member (510) having a thermal expansion coefficient close to that of the magnetic body within a region of 15%. In this way, the two throughholes (101a, 101b; 501a, 501b) behave, as if the starting extremity (107a) and the ending extremity (107b) of each of coil conductors (107) passed through magnetically one throughhole, so that magnetic field components produced at the starting portion and the ending portion cancel each other and that the coupling coefficient between the rotor core and the stator core is increased.
摘要翻译：一对通孔（101a，101b），设置在转子铁心（104）上的每个线圈导体（107）的起始末端（107a）和末端（107b）以及构成旋转变压器的定子铁心的一对通孔被引导到相应的后表面，通过连接狭缝（120）连接。或者每个线圈导体（507）的起始末端（507a）和末端（507b）都被引导的一个通孔（501）通过设置非线性元件被分成两个通孔（501a，501b） - 磁性分隔构件（510），其在15％的区域内的热膨胀系数接近于磁体的热膨胀系数。以这种方式，两个通孔（101a，101b; 501a，501b）的行为就好像每个线圈导体（107）的起始末端（107a）和末端（107b）通过磁性通过一个通孔，使得磁在起始部分和末端部分产生的场分量相互抵消，并且转子芯和定子铁心之间的耦合系数增加。

8. 发明公开

EP0242861A3 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0242861A3
公开(公告)日：1989-10-11
申请号：EP87105879.8
申请日：1987-04-22
申请人： HITACHI, LTD.
发明人： Abe, Mitsuo , Konishi, Katsuo , Ohshima,Isao , Kawano, Kanji , Sasaki, Takumi , Zama, Hideo
IPC分类号： G11B5/31 , G11B5/187
CPC分类号： G11B5/187 , G11B5/3176
摘要： A magnetic head (10) comprising a pair of magnetic cores (12, 12') of magnetic thin films which are sandwiched by a pair of non-magnetic substrates (11, 11'), in which the magnetic cores are limitedly formed in the neighborhood of a winding window (14) provided in at least one of the non-magnetic substrates.
摘要翻译：一种磁头（10），包括一对由一对非磁性基片（11,11'）夹持的磁性薄膜的磁芯（12,12'），其中磁芯有限地形成在设置在至少一个非磁性基板上的绕组窗口（14）附近。

9. 发明公开

EP1052624A1 Video signal recording apparatus and video signal recording and reproducing apparatus 失效
标题翻译：一种视频记录和再现装置
公开(公告)号：EP1052624A1
公开(公告)日：2000-11-15
申请号：EP00117249.3
申请日：1995-12-18
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Owashi, Hitoaki , Noguchi, Takaharu , Kumasaka, Noriyuki , Zama, Hideo
IPC分类号： G11B5/008 , G11B15/12 , G11B15/473 , G11B15/18 , H04N5/782 , H04N9/79
CPC分类号： H04N5/78213 , G11B5/0086 , G11B5/00878 , G11B15/02 , G11B15/125 , G11B15/1875 , G11B15/4671 , G11B15/4672 , G11B15/4731 , H04N5/78266 , H04N9/7921 , H04N9/8042 , H04N9/83
摘要： An apparatus for recording and reproducing a digital video signal on and from a common recording medium by using the head configuration common to the conventional one while maintaining exchangeability with the current analog VTR. An analog video and audio signals are recorded and reproduced on and from an video track and an underlying deep-layer track, respectively, by means of magnetic heads (1a, 1b) and magnetic heads (2a, 2b). On the other hand, a digital video and audio signal is recorded and reproduced on and from two adjacent tracks by means of the magnetic heads (2a, 2b) for analog audio recording. During reproduction, an identification signal generating circuit (53) generates an identification signal for discriminating a recorded signal, and a control signal is PWM modulated with the identification signal and recorded on a control track by means of a magnetic head (4).

10. 发明公开

EP0718825A1 Video signal recording apparatus and video signal recording and reproducing apparatus 失效
标题翻译：视频信号记录装置和视频信号记录和再现装置
公开(公告)号：EP0718825A1
公开(公告)日：1996-06-26
申请号：EP95119989.2
申请日：1995-12-18
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Owashi, Hitoaki , Noguchi, Takaharu , Kumasaka, Noriyuki , Zama, Hideo
IPC分类号： G11B5/008 , G11B15/12 , G11B15/18 , G11B15/467 , G11B15/02 , H04N5/782 , H04N9/79
CPC分类号： H04N5/78213 , G11B5/0086 , G11B5/00878 , G11B15/02 , G11B15/125 , G11B15/1875 , G11B15/4671 , G11B15/4672 , G11B15/4731 , H04N5/78266 , H04N9/7921 , H04N9/8042 , H04N9/83
摘要： An apparatus for recording and reproducing a digital video signal on and from a common recording medium by using the head configuration common to the conventional one while maintaining exchangeability with the current analog VTR. An analog video and audio signals are recorded and reproduced on and from an video track and an underlying deep-layer track, respectively, by means of magnetic heads (1a, 1b) and magnetic heads (2a, 2b). On the other hand, a digital video and audio signal is recorded and reproduced on and from two adjacent tracks by means of the magnetic heads (2a, 2b) for analog audio recording. During reproduction, an identification signal generating circuit (53) generates an identification signal for discriminating a recorded signal, and a control signal is PWM modulated with the identification signal and recorded on a control track by means of a magnetic head (4).
摘要翻译：一种用于在保持与当前模拟VTR的可交换性的同时，通过使用常规记录介质的公用头部配置在公共记录介质上记录和再现数字视频信号的设备。通过磁头（1a，1b）和磁头（2a，2b）分别在视频轨道和下层深层轨道上记录和再现模拟视频和音频信号。另一方面，数字视频和音频信号通过用于模拟音频记录的磁头（2a，2b）在两个相邻轨道上记录和再现。在再现期间，识别信号产生电路（53）产生用于识别记录信号的识别信号，并且利用识别信号对控制信号进行PWM调制，并借助于磁头（4）将其记录在控制轨道上。

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