Browse Prior Art Database

Portable Data Storage Volumes

IP.com Disclosure Number: IPCOM000082404D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Brigham, RA: AUTHOR [+5]

Abstract

Volumes stored in a library between transfers to computer-connected read/write stations carry data in magnetic, electric or electrostatic form.

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Portable Data Storage Volumes

Volumes stored in a library between transfers to computer-connected read/write stations carry data in magnetic, electric or electrostatic form.

A data library stores volumes in cubby holes as shown in Fig. 1. An electromechanical access mechanism moves between positions A and B and carries a single volume at a time to read/write stations, which exchange data between the volumes and a computer.

The volumes may store data as magnetized areas on a magnetic tape (Fig. 2a), drum (Fig. 2b), disc, card or the like. Alternatively, the data may be stored in a small portable memory circuit of the type shown in Fig. 2c. The circuit could include magnetic cores which retain their stored information without external power.

Other possibilities include cryogenic and bubble devices. Or, as in Fig. 3a, the card may include power storage (such as a battery) for storing data in a shift register via control and data input lines, and an output connected to the read/write station when the volume is placed therein. If desired, the shift register can be modified for parallel (and, thus, addressable) operation. An internal oscillator can continuously circulate data in a dynamic shift register storage arrangement.

Still another version appears in Fig. 3b, where a capacitor C holds a single bit of a multiple-bit data group provided in each circuit card.

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