Browse Prior Art Database

Microfiche Grid Index Arrangement

IP.com Disclosure Number: IPCOM000090923D
Original Publication Date: 1969-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Morey, CJ: AUTHOR

Abstract

This arrangement enables manual location of a sheet of microfiche to align a selectable single frame under the optical system for viewing. Sheet 1 of microfiche has five rows A...E of film frames with twenty frames per row. Transparent template 2 is properly positioned, as by locating pins 3, on viewer table 4. Overprinted on template 2 are a series of lettered row lines A...E and numbered column lines which correspond to the size and X-Y coordinate spacing of the rows and columns of film frames on sheet 1. As shown in one broken away portion, frame C18 is positioned between two glass sheets in alignment with optical axis 6 for viewing. Only the upper sheet 5 is shown.

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Microfiche Grid Index Arrangement

This arrangement enables manual location of a sheet of microfiche to align a selectable single frame under the optical system for viewing. Sheet 1 of microfiche has five rows A...E of film frames with twenty frames per row. Transparent template 2 is properly positioned, as by locating pins 3, on viewer table 4. Overprinted on template 2 are a series of lettered row lines A...E and numbered column lines which correspond to the size and X-Y coordinate spacing of the rows and columns of film frames on sheet 1.

As shown in one broken away portion, frame C18 is positioned between two glass sheets in alignment with optical axis 6 for viewing. Only the upper sheet 5 is shown. This positioning is achieved manually by locating frame 7, which is A20 on the fiche, with its upper edge flush with row line C and its left edge aligned with column line 18.

On the other hand, to view frame B9, frame 8, which is A1 on the fiche, is manually positioned as shown in the other broken away portion with its upper edge flush with row line B and its right hand edges aligned with column line 9. Thus, frames in columns 10...20 are referenced from the leftmost film frame edge of the fiche, i.e., from the left edge of frame A20. The frames in columns 1...10 are referenced from the rightmost film frame edge, i.e., from the right edge of frame A1. Hence, frames in column 10 can be referenced from either the left edge of A20 or right edge of A1. But the rows A t...