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Slide Device with Odd Parity Coding

IP.com Disclosure Number: IPCOM000091092D
Original Publication Date: 1969-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Houdek, ME: AUTHOR

Abstract

Slide 10 has a series of indicia 11 with a recess 12 respectively corresponding to each indicia. Slide 10 is mounted in track 13 to permit reciprocating motion. Slide 10 is moved in one direction to a stationary stop by a stylus inserted in the recess 12 corresponding to the selected indicia, to be there retained until sensed and is biased in the opposite direction. The biasing, mechanical stop position and retaining devices are not shown.

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Slide Device with Odd Parity Coding

Slide 10 has a series of indicia 11 with a recess 12 respectively corresponding to each indicia. Slide 10 is mounted in track 13 to permit reciprocating motion. Slide 10 is moved in one direction to a stationary stop by a stylus inserted in the recess 12 corresponding to the selected indicia, to be there retained until sensed and is biased in the opposite direction. The biasing, mechanical stop position and retaining devices are not shown.

The reverse side of slide 10 carries a series of sensing spots 15 which have twice the pitch of recesses 12. Thus, moving slide 10 a distance between two adjoining characters indexes such slide two sensing spot positions. The dark spots are representative of a logical one and the light spots indicate a logical zero. As shown for a 16-position slide there are 35 sensing spots 15 coded to give an odd parity.

When slide 10 is positioned, sensing device 17 observes five consecutive sensing spots corresponding to the indicia selected with the stylus. The coded sequences sensed are mutually exclusive with a representative odd parity as shown in the table. The sensing element as shown at B is sensing an F as the coded combination 10000 is presented.

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