Browse Prior Art Database

Strip Selection System

IP.com Disclosure Number: IPCOM000091445D
Original Publication Date: 1968-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 46K

Publishing Venue

IBM

Related People

Weidenhammer, JA: AUTHOR [+2]

Abstract

The device randomly selects any strip 2a in a pack of flat strips, used in the data storage system of the type described on page 1350. Air nozzles 17 provide jets of air which effectively separate each strip 2a from its adjacent strips in the pack. Coded selection notches 3 are provided on the bottom end of each strip. Each strip in the pack has a unique address encoded by a unique permutation of notches 3 at positions which align with the corresponding binary positions of bails 4a... f. The six binary digit pattern shown accommodates up to sixty-four strips in a pack. A notch or its lack are present in adjacent halves of each digit position, aligning with the two positions of each bail 4, to represent by the 180 degree phasing of each notch a 1 or 0 digit value.

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Strip Selection System

The device randomly selects any strip 2a in a pack of flat strips, used in the data storage system of the type described on page 1350. Air nozzles 17 provide jets of air which effectively separate each strip 2a from its adjacent strips in the pack. Coded selection notches 3 are provided on the bottom end of each strip. Each strip in the pack has a unique address encoded by a unique permutation of notches 3 at positions which align with the corresponding binary positions of bails 4a... f. The six binary digit pattern shown accommodates up to sixty-four strips in a pack. A notch or its lack are present in adjacent halves of each digit position, aligning with the two positions of each bail 4, to represent by the 180 degree phasing of each notch a 1 or 0 digit value. The notches can be closely spaced so that adjacent oppositely-phased notches can run together as shown. Narrow notches can be used so that coding is compact.

In the six-digit example shown, six selection bails 4a...4f are used, each having two positions representing 0 and 1 values. Each bail such as 4c, is actuated by a magnet 6 and a linkage 16 shown pivoting about pivot 5c. Ejection for the selected strip is controlled by a single lifter bail 7 which pivots at 19. Bail 7 both raises and lowers the pack gently for selection, as well as for rapidly ejecting the selected strip. In order to accomplish this, a high-inertia bumper member 8 is provided.

Bail 7 is normally urged upward by spring 9, which urges bail 7 against bumper surface 8a of member 8, until the assembly of 7 and 8 is halted by fixed stop 13. While doing this, bail 7 lifts all strips in the pack slightly to clear the tips of selection bails 4a...4f. The latter can then be set by their associated magnets 6 to any required binary selection value without damage to the strip notches for selecting the next strip.

After bails 4a...4f are set, cocking solenoid 11 is energized to pull bail 7 downward by hook 10 engaging pin 18 fixed to such bail. This lowers all strips in the pack u...