Browse Prior Art Database

Multielement Head Design for Separate Clock Function Sensing

IP.com Disclosure Number: IPCOM000088138D
Original Publication Date: 1977-Apr-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Schwarz, TA: AUTHOR

Abstract

Separate read-only transducers are provided in the same transverse plane as the transducers providing the erase, write and read functions over a plurality of tracks being sensed by the multielement, head-per-track recording head. The separate read transducers sense a separate track or tracks that provide the clock pulses and function signals such as beginning of tape (BOT), end of tape (EOT), speed detection and interblock gap (IBG) signals.

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Multielement Head Design for Separate Clock Function Sensing

Separate read-only transducers are provided in the same transverse plane as the transducers providing the erase, write and read functions over a plurality of tracks being sensed by the multielement, head-per-track recording head. The separate read transducers sense a separate track or tracks that provide the clock pulses and function signals such as beginning of tape (BOT), end of tape (EOT), speed detection and interblock gap (IBG) signals.

In the figure is illustrated a multitrack, separate read and write transducer assembly 10, such as disclosed in U. S. Patent 3,813,766, which can be equipped with extra read transducers 20 positioned to sense separate tracks 13 and 14 from a tape media 15. The assembly 10 comprises at least one erase transducer 16, at least one write transducer 17 and at least one read transducer 18 for operating with the data information from a track 19 on the tape media 15. Separate read-only transducers 20 are positioned at the edges of the assembly 10 to sense the tracks 13 and 14.

The tracks 13 and 14 are prerecorded onto the media 15 and in general provide the clocking pulses for timing the transducer operations and for indicating the speed of the media. Double frequency pulses can be used to pattern BOT, EOT and IBG signals. The transducers 20, positioned transversely with the erase transducer 16 and write transducer 17, can detect the patterns to identify the signal early en...