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Scaled Tab Storage in Multiple Pitch Machines with Memory

IP.com Disclosure Number: IPCOM000055033D
Original Publication Date: 1980-May-01
Included in the Prior Art Database: 2005-Feb-13

Publishing Venue

IBM

Related People

Authors:
Booth, JR Hallman, BL Mahlbacher, PA Schuller, WM [+details]

Abstract

In order to preserve the proportions of the text's format in all playout pitches, it is necessary to scale the tab lengths that are stored in memory. When a tab is keyed-in during text-record, it is immediately broken down into a number of elements called tab spaces. The tab space is equivalent in length to the space-bar space. The number of tab spaces in the tab is generated by dividing the length of the tab by the length of the space. In proportional spacing mode (PSM), the length of the tab may not be an even multiple of spaces, in which case there is a fraction of a space remaining. The tab is stored in memory as a sequence of consecutive tab spaces (and terminated by a fractional space if the pitch is PSM), rather than as an absolute escapement magnitude.