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Browse Prior Art Database

Disk Merge/Demerge Nest

IP.com Disclosure Number: IPCOM000102185D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 3 page(s) / 120K

Publishing Venue

IBM

Related People

Erickson, RD: AUTHOR [+2]

Abstract

Illustrated in Fig. 1 is a merge/demerge nest in a merged state. The nest consists of a frame 1, motor 2, lead screw 3, drive nut 4, fifteen disk cradles 5, drive pins 6, two travel sensors 7, and a location flag 8. Fig. 2 shows the nest in its demerged state.

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

Disk Merge/Demerge Nest

       Illustrated in Fig. 1 is a merge/demerge nest in a merged
state.  The nest consists of a frame 1, motor 2, lead screw 3, drive
nut 4, fifteen disk cradles 5, drive pins 6, two travel sensors 7,
and a location flag 8.  Fig. 2 shows the nest in its demerged state.

      The nest is actuated from the merged to the demerged state by a
12 V drive motor.  This motor is coupled to a lead screw which is set
between two bearings at each end of the nest frame.  The disk cradle
closest to the motor is the driver cradle.  It has a drive nut
attached to it and is driven back and forth by the lead screw.  The
next 13 cradles are connected to each other and the driver with pins
that have a tapered head on them.  These pins serve two purposes:  1)
to keep the 15 cradles aligned and attached to each other and 2) to
achieve the desired demerged spacing. The last cradle is attached to
the nest frame.  When the 15 cradles are in the merged state the
spacing is set because of the cradle thickness.  The two optical
sensors are used to accelerate/decelerate and stop the cradles at the
end of the merge and demerge operation.  The flag is notched for two
positions for the optical sensors.  As the flag comes into view of
the sensor, the first sensor eye will see the flag and signal the
motor to slow down.  The second sensor eye stops the motor as the
flag passes in front of it.  This action takes place at both ends of
the nest at the precise time that the nest reaches either the merged
or demerged state.

      From a merged state to a demerged state, the chain of events is
as follows.  Fifteen disks are placed in the nest at the 1/4-inch
spacing, and the motor is actuated.  The lead screw turns clockwise,
and the driver cradle starts to move.  As the driver cradle starts to
move, the two pins that are pressed into it slide through the first
floating cradle.  When a 1/2-inch spacing is achieved between the
driver and the first cradle, the tapered head on the pin seats into a
countersink of the floating cradle.  This will align the floating
cradle with the driver and start to carry it along with the driver
cradle.  As the pins of the first floating cradle seat into...