Dynamic magnetic information storage or retrieval – Recording for monetary delay of an analog signal
Reexamination Certificate
2005-06-14
2005-06-14
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Recording for monetary delay of an analog signal
Reexamination Certificate
active
06906873
ABSTRACT:
A method and apparatus to monitor the positioning of a tape leader pin in a tape threader block moveably disposed in a tape drive. The' apparatus includes a tape threader block assembly comprising a first circuit having a first coil, a second circuit having a second coil, where that second circuit has an impedance, where the first coil is disposed adjacent the second coil. The apparatus further includes a detection circuit which detects the impedance of the second circuit, where the second circuit has a first impedance when the first circuit is open, and where the second circuit has a second impedance when the second circuit is closed. In the event a tape leader pin is properly releaseably fixtured to Applicants' threader block, the first circuit is closed and the impedance of the second circuit changes. The detection circuit detects that impedance change and provides a signal to a controller indicating that the tape leader pin is properly seated in the threader block.
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Argumedo Armando J.
Childers Edwin R.
Taylor Mark A.
West Richard A.
Hudspeth David
International Business Machines - Corporation
Regelman Dale F.
Tzeng Fred F.
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