Browse Prior Art Database

Vertical Skip Carriage Control

IP.com Disclosure Number: IPCOM000097078D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Weiss, L: AUTHOR

Abstract

This device controls the vertical skip of paper forms in a carriage. It comprises a coding disk 10 secured to the carriage platen shaft 12 which causes a bi-directional counter 16 to advance in step with platen 14. A neon photoconductor format control device 18 initiates a skip in accordance with information punched in a format control card. Neon photoconductor circuitry compares the count in the counter with the line number that has been programmed to stop the platen drive.

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Vertical Skip Carriage Control

This device controls the vertical skip of paper forms in a carriage. It comprises a coding disk 10 secured to the carriage platen shaft 12 which causes a bi-directional counter 16 to advance in step with platen 14. A neon photoconductor format control device 18 initiates a skip in accordance with information punched in a format control card. Neon photoconductor circuitry compares the count in the counter with the line number that has been programmed to stop the platen drive.

Light from source 20 shines through the coding disk 10 onto a fixed. reference member 22. This has four photocells 24, 26, 28 and 30 spaced radially. One set of holes 32 in the coding disk 10 is radially spaced. Each hole represents a print line space, the other three sets of holes 34, 36 and 38 are staggered so that two of the photocells 24, 26 and 28 are illuminated when the platen 14 is between line spaces. The output of photocells 24, 26 and 28 is coupled to bi-directional counter 16. The counter is advanced by an output from two of the three photocells. To initiate a vertical skip step, neon F is energized which causes photoconductor F1 to switch to its low resistance and energize neon A. Photoconductor F2 turns off neon D. The turnon of neon A causes the vertical carriage motion to start through its photoconductor A3 and turns on neon B through its photoconductor A1. The compare neon 40 is reset by means of photoconductor A4. Neon D is turned on by photoco...