Browse Prior Art Database

Multi-Media Diskette Drive for Personal Computer Systems

IP.com Disclosure Number: IPCOM000100187D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 4 page(s) / 131K

Publishing Venue

IBM

Related People

Genduso, TB: AUTHOR [+2]

Abstract

A multi-media diskette drive mechanism is described which can be used in personal computer systems and has the capability of handling either a 3-1/2" or a 5-1/4" diskette in one drive unit. This single drive unit eliminates the need for separate drive units for each size diskette, since the single drive can accept either of the two sizes. In addition, either of the two sizes may be designated as the "A" or "B" drive.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Multi-Media Diskette Drive for Personal Computer Systems

       A multi-media diskette drive mechanism is described which
can be used in personal computer systems and has the capability of
handling either a 3-1/2" or a 5-1/4" diskette in one drive unit.
This single drive unit eliminates the need for separate drive units
for each size diskette, since the single drive can accept either of
the two sizes.  In addition, either of the two sizes may be
designated as the "A" or "B" drive.

      Typically, personal computer systems are manufactured with
either 3-1/2" or 5-1/4" disk drives to accommodate programs written
in these formats.  Many times, programs are written to operate
correctly only in the "A" drive requiring that the "A" drive be of
one specific size.  Often the user must purchase an external disk
drive to accommodate the two different formats.  The concept
described herein provides the ability for one disk drive unit to
accept either of the two diskette sizes, enabling users to work
directly with either diskette format.

      The multi-media diskette drive, as shown in Fig. 1, has the
same overall dimensions as 5-1/4" drives, since it requires the
ability to accept the wider diskette, but it also has the ability to
accept the 3-1/2" diskette, which is thicker and smaller.  The lock
lever device is similar and continues to rotate clockwise for locking
the diskette in position.  The light-emitting diode (LED) lights when
the diskette is being read or written.  Each diskette has its own
write protect switch, similar to the existing models.

      The concept implements four distinct features to provide the
multi-media functions:
1) A mechanical actuating system for determining the size of the
inserted diskette and a mechanism for preventing the insertion of a
diskette if one of either size is already in position .
2) A mechanical actuating system for automatically positioning the
diskette between the read/write heads, simultaneously opening the
protective cover used with the 3-1/2" diskettes.
3) Utilizing a single drive mechanism to operate either size
diskette.
       4) Incorporating electrical signals to inform the software as
to the size of the diskette being used.

      When a user inserts a 5-1/4" diskette, it will slide onto
diskette positioning plate 10, as shown in Fig. 2.  The insertion of
a 3-1/2" diskette will slide under diskette positioning plate 10.
Once the diskette is inserted, the operator rotates the lock handle
clockwise, enabling idler wheel assembly 11 to be lowered
automatically.  If a 3-1/2" diskette is inserted and not a 5-1/4"
size, the downward motion of idler wheel assembly 11 will rest on the
plastic case of the 3-1/2" diskette.

      With the 5-1/4" diskette inserted, idler wheel 12 will pass
through the center hole of the diskette enabling the outer rim of
idler wheel 12 to line up with the inner rim of the reinforced center
hole of the 5-1/...