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1. 发明公开

EP0265095A2 Apparatus for erasing magnetic tape 失效
标题翻译： GerätzumLöschenvon Magnetband。
公开(公告)号：EP0265095A2
公开(公告)日：1988-04-27
申请号：EP87308661.5
申请日：1987-09-30
申请人： Data Security, Inc.
发明人： Schultz, Robert Allen
IPC分类号： G11B5/024
CPC分类号： G11B5/0245
摘要： A bulk degausser apparatus for erasing a reel (22) of high energy magnetic tape includes a means for generating magnetic fields including a coil (L1) defining a window (34) for passage of the reel (72) of tape. The coil (L1) includes a first winding (L2) having relatively few turns and a second winding (L3), inductively coupled to the first winding (L2), and having relatively many turns. The apparatus also includes an ac power supply (82) connected to the first winding (L2) and a dc power supply (84) connected to the second winding (L3). A resonance capacitor (C1) is interconnected with the second winding (L3) for substantially balancing the inductive reactance of the second winding (L3) at the frequency of the ac power supply. The apparatus also includes an isolation relay (K3) interconnecting the capacitor (C1) and the second winding (L3) with the dc power supply, for isolating the dc power supply when the first winding (L2) is energized by the ac power supply (82). Energization of the second winding (L3) by the dc power supply (84) causes a tape (22) in the window (34) to undergo a dc magnetic field, and energization of the first winding (L2) by the ac power supply induces ac current in the second winding (L3) resulting in a reel (22) in said window (34) experiencing an ac magnetic field. A drive mechanism for translating and rotating the reel (22) of high energy magnetic tape with respect to the coil (L1), is also disclosed.
摘要翻译：用于擦除高能磁带的卷轴（22）的体积消减装置包括用于产生磁场的装置，包括限定用于磁带卷轴（72）通过的窗口（34）的线圈（L1）。线圈（L1）包括具有相对较少匝数的第一绕组（L2）和感应耦合到第一绕组（L2）并且具有相对较多匝的第二绕组（L3）。该装置还包括连接到第一绕组（L2）的交流电源（82）和连接到第二绕组（L3）的直流电源（84）。谐振电容器（C1）与第二绕组（L3）互连，用于以交流电源的频率基本平衡第二绕组（L3）的感抗。该装置还包括用直流电源将电容器（C1）和第二绕组（L3）互连的隔离继电器（K3），用于在第一绕组（L2）由交流电源供电时隔离直流电源（ 82）。通过直流电源（84）对第二绕组（L3）的通电导致窗口（34）中的带（22）经受直流磁场，并且由交流电源引起的第一绕组（L2）的激励引起在第二绕组（L3）中的交流电流导致所述窗口（34）中的卷轴（22）经历交流磁场。还公开了一种用于相对于线圈（L1）平移和旋转高能磁带的卷轴（22）的驱动机构。

2. 发明公开

EP0265095A3 Apparatus for erasing magnetic tape 失效
标题翻译：用于擦除磁带的装置
公开(公告)号：EP0265095A3
公开(公告)日：1991-07-31
申请号：EP87308661.5
申请日：1987-09-30
申请人： Data Security, Inc.
发明人： Schultz, Robert Allen
IPC分类号： G11B5/024
CPC分类号： G11B5/0245
摘要： A bulk degausser apparatus for erasing a reel (22) of high energy magnetic tape includes a means for generating magnetic fields including a coil (L1) defining a window (34) for passage of the reel (72) of tape. The coil (L1) includes a first winding (L2) having relatively few turns and a second winding (L3), inductively coupled to the first winding (L2), and having relatively many turns. The apparatus also includes an ac power supply (82) connected to the first winding (L2) and a dc power supply (84) connected to the second winding (L3). A resonance capacitor (C1) is interconnected with the second winding (L3) for substantially balancing the inductive reactance of the second winding (L3) at the frequency of the ac power supply. The apparatus also includes an isolation relay (K3) interconnecting the capacitor (C1) and the second winding (L3) with the dc power supply, for isolating the dc power supply when the first winding (L2) is energized by the ac power supply (82). Energization of the second winding (L3) by the dc power supply (84) causes a tape (22) in the window (34) to undergo a dc magnetic field, and energization of the first winding (L2) by the ac power supply induces ac current in the second winding (L3) resulting in a reel (22) in said window (34) experiencing an ac magnetic field. A drive mechanism for translating and rotating the reel (22) of high energy magnetic tape with respect to the coil (L1), is also disclosed.
摘要翻译：用于擦除高能磁带的卷轴（22）的体积消减装置包括用于产生磁场的装置，包括限定用于磁带卷轴（72）通过的窗口（34）的线圈（L1）。线圈（L1）包括具有相对较少匝数的第一绕组（L2）和感应耦合到第一绕组（L2）并且具有相对较多匝的第二绕组（L3）。该装置还包括连接到第一绕组（L2）的交流电源（82）和连接到第二绕组（L3）的直流电源（84）。谐振电容器（C1）与第二绕组（L3）互连，用于以交流电源的频率基本平衡第二绕组（L3）的感抗。该装置还包括用直流电源将电容器（C1）和第二绕组（L3）互连的隔离继电器（K3），用于在第一绕组（L2）由交流电源供电时隔离直流电源（ 82）。通过直流电源（84）对第二绕组（L3）的通电导致窗口（34）中的带（22）经受直流磁场，并且由交流电源引起的第一绕组（L2）的激励引起在第二绕组（L3）中的交流电流导致所述窗口（34）中的卷轴（22）经历交流磁场。还公开了一种用于相对于线圈（L1）平移和旋转高能磁带的卷轴（22）的驱动机构。

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