Browse Prior Art Database

Selectively Variable Bulk Erase Mechanism

IP.com Disclosure Number: IPCOM000091806D
Original Publication Date: 1968-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Kolpek, RA: AUTHOR [+2]

Abstract

The dictating apparatus includes a bulk erase mechanism. This is variably settable to enable manually-controlled erasure of all or only a selected portion of a magnetic belt record media. Apparatus 1 at A, has microphone 2 for dictation and control. Index slip 3 indicates the relative location with respect to magnetic belt 4 of a magnetic head, not shown, mounted on index carrier 5. Belt 4 is selectively erased by mechanism 6 having a permanent bar magnet 7 at B, C, and D. Magnet 7 is mounted on member 8 that is slidably movable as indicated by arrow 9 in support member 10. Member 8 carries index slip 11 that moves adjacent mark 12 on the frame of apparatus 1 to indicate the portion of belt 4 to be erased. As an example, portion a on slip 11 indicates portion b on belt 4 is to be erased by magnet 7.

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Selectively Variable Bulk Erase Mechanism

The dictating apparatus includes a bulk erase mechanism. This is variably settable to enable manually-controlled erasure of all or only a selected portion of a magnetic belt record media. Apparatus 1 at A, has microphone 2 for dictation and control. Index slip 3 indicates the relative location with respect to magnetic belt 4 of a magnetic head, not shown, mounted on index carrier 5. Belt 4 is selectively erased by mechanism 6 having a permanent bar magnet 7 at B, C, and D. Magnet 7 is mounted on member 8 that is slidably movable as indicated by arrow 9 in support member 10. Member 8 carries index slip 11 that moves adjacent mark 12 on the frame of apparatus 1 to indicate the portion of belt 4 to be erased. As an example, portion a on slip 11 indicates portion b on belt 4 is to be erased by magnet 7. Member 10 is carried by hanger 13 pivotally attached to pivot shaft 19 on the inner upper surface of apparatus 1 by bracket 14 and arranged for rotation by lever 15 from the inoperative condition at C to the operative condition at D. To operate the mechanism, lever 15, pivoted at 16 and engaged with hanger 13 on stud 17, is moved toward the front of the machine as indicated by arrow 18. This engages magnet 7 with belt 4. Microphone 2 is operated to drive belt 4 through its entire length past magnet 7 erasing the portion b selected.

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