Message location calibration method and system

Details Message location calibration method and system Message location calibration method and system

1986-01-17

1987-10-20

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 722, G11B 1518

Patent

active

047018143

ABSTRACT:
A method of calibrating the addresses of messages on a copy record duplicated from a master record of such messages having known addresses. Prior to duplication of the master record, first and second cues are recorded on the master record, which cues are separated by a known or determined distance along a track of the master record. After the copy record has been duplicated from the master record and installed in the message retrieval system, the system determines the distance between the duplicated cues on the copy record and derives a correction factor from the distance so determined and the known distance between the recorded cues on the master record. When a message is selected for being reproduced by the message retrieval system, the correction factor is applied to the address of the selected message on the master record to obtain a corrected address of the selected message on the copy record. The invention further includes the system utilizing the present method, as well as the copy record and the master record for use in connection with such system.

REFERENCES:
patent: 4062048 (1977-12-01), Weber
patent: 4159490 (1979-06-01), Wood
patent: 4471391 (1984-09-01), Reagan

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