Dual floppy disc machine

Details Dual floppy disc machine Dual floppy disc machine

1980-04-11

1982-07-13

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 98, G11B 5016, G11B 1706

Patent

active

043397786

ABSTRACT:
A single device for driving a pair of floppy discs, preferably the smaller mini floppy discs, is disclosed herein and identified as a dual floppy disc machine. A drive motor is coupled to a pair of rotatable spindles mounted side by side. The spindles receive respective floppy discs thereon, and are driven at a speed not to exceed 50 rpm, much lower than the speed of conventional floppy disc machines. A pair of read/write heads are provided which have a capacity of reading no more than 20,000 bits per second, again well below conventional rates but sufficient for the speeds used in the present invention. A single carriage has both read/write heads mounted thereon in spaced relationship, and is moveable along an axis bisecting a line connecting the centers of the spindles. As a result, the read/write heads are moveable in unison radially relative to the respective spindles. A stepping motor is coupled to the carriage to move the carriage along its axis. The pair of floppy discs are clamped to their respective spindles, and the read/write heads are biased against the respective discs so that both discs can be utilized.

REFERENCES:
patent: 3815150 (1974-06-01), Stoddard et al.
patent: 3965485 (1976-06-01), Morin
patent: 4052746 (1977-10-01), Weller
patent: 4224648 (1980-09-01), Roling

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