Portable bubble memory apparatus

Details Portable bubble memory apparatus Portable bubble memory apparatus

1981-07-10

1984-04-24

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

G11C 1908

Patent

active

044451997

ABSTRACT:
A portable bubble memory apparatus having a bubble memory cassette for accommodating a bubble memory element, and a portable cassette adapter provided with a cassette holder for loading and unloading the bubble memory cassette, the portable cassette adapter housing a control circuit and peripheral circuitry for the bubble memory element. A signal generator generates a signal to indicate whether the bubble memory cassette has been loaded at the correct position within the cassette holder. If the bubble memory cassette is displaced from the correct position, the generated signal causes the exchange of information between the bubble memory cassette and an external unit to cease. Additionally, if the bubble memory cassette is displaced from its correctly loaded position the electrical connection between the bubble memory cassette and the portable cassette adapter is maintained at least for a period of time, measured from the generation of the signal, required for the bubbles in the bubble memory to shift to a predetermined position, thereby preventing the loss of information stored in the bubble memory element.

REFERENCES:
patent: 3947883 (1976-03-01), Suzuki
patent: 4156934 (1979-05-01), Burford
patent: 4308593 (1981-12-01), Young et al.
patent: 4400795 (1983-08-01), Irie et al.
Electronics-vol. 54, No. 9; May 5, 1981, pp. 149-151.

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