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Character Selection For Mosaic Printer

IP.com Disclosure Number: IPCOM000097925D
Original Publication Date: 1961-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Mako, J: AUTHOR

Abstract

In a mosaic printer, dot forming wires 21 of a matrix are individually driven to form a data imprint on a print medium. A device for selecting and operating various combinations of wires of the matrix comprises a character selector drum 10, rotatably mounted on a shaft 11 and having a plurality of openings 12 in its surface. Openings 12 are arranged axially over the surface of 10. There are various combinations in a plurality of tracks to indicate characters to be printed. The number of tracks is equal to the number of wires 21 in the print matrix. Character identifying light signals are formed by the openings 12. The light source is a tube 13 inside a reflector 14. The light signals are converted to electric signals by photocells 15.

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Character Selection For Mosaic Printer

In a mosaic printer, dot forming wires 21 of a matrix are individually driven to form a data imprint on a print medium. A device for selecting and operating various combinations of wires of the matrix comprises a character selector drum 10, rotatably mounted on a shaft 11 and having a plurality of openings 12 in its surface. Openings 12 are arranged axially over the surface of 10. There are various combinations in a plurality of tracks to indicate characters to be printed. The number of tracks is equal to the number of wires 21 in the print matrix. Character identifying light signals are formed by the openings 12. The light source is a tube 13 inside a reflector 14. The light signals are converted to electric signals by photocells 15. These are arranged in a row parallel to the axis of drum 10 proximate the outside surface. Each of the photocells 15 is connected by leads 16 to individual AND's 17. These have output connections 18 to print drive amplifiers 19, connected to windings 20 of the individual wires 21 of the matrix.

Drum 10 also has a character code track comprising openings 22 adapted to apply a series of light pulses to photocell 23. Signals from photocell 23 are delivered to binary character counter 24 through lead 25 to identify a character in position to be printed on impulses from openings 12. A comparator 26 has input leads 27 and 28 connected to the output of character counter 24 and input register 29, respe...