发明名称 |
MAGNETIC TAPE CARTRIDGE WITH FILE PROTECT FEATURE |
摘要 |
A magnetic tape cartridge (11) comprises a device (16) settable to prevent inadvertent recording and thus erasure on the tape. The device (16) comprises a shaft (21) carrying a control disc (18) intermediate its length. The disc 18 either masks a sensor (23) from a light source (22) or allows illumination of the sensor according to its angular setting. The unit (16) is rotatably mounted in a sleeve (12) formed integraliy with a part (11) of the cartridge. The unit 16 has a screwdriver slot (17c) and an indicator (17b). The sensor (23) is connected in a read/write control circuit. |
申请公布号 |
DE3167783(D1) |
申请公布日期 |
1985.01.31 |
申请号 |
DE19813167783 |
申请日期 |
1981.03.31 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
LARSON, RICHARD THOR;MCMURTRY DAVID HARWOOD;RINKLEIB, HELFRIED OTTO |
分类号 |
G11B23/28;G11B23/04;(IPC1-7):G11B23/04;G11B15/04;G11B15/06 |
主分类号 |
G11B23/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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