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Apparatus for Automatically Printing Errors

IP.com Disclosure Number: IPCOM000095636D
Original Publication Date: 1964-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Kerr, JW: AUTHOR

Abstract

In this printer, apparatus is provided for automatically printing an error indicating symbol without the use of error detecting circuitry. The format of the print element or print head is arranged so that valid characters are printed only when represented by the proper code. Any improper representation of a character or any failure by a component in the print setup mechanism automatically sets the print head so that an error or other distinguishing symbol is printed.

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Apparatus for Automatically Printing Errors

In this printer, apparatus is provided for automatically printing an error indicating symbol without the use of error detecting circuitry. The format of the print element or print head is arranged so that valid characters are printed only when represented by the proper code. Any improper representation of a character or any failure by a component in the print setup mechanism automatically sets the print head so that an error or other distinguishing symbol is printed.

The arrangement of print elements on print head 10 is such that the numeric character is printed when the print setup mechanism is operating properly. Otherwise, an alphabetic character or special symbol is printed. Magnets T1, T2, R1, R2, R2a and R5 control the print setup mechanism shown in IBM Customer Engineering Manual of Instruction, Form No. 221-6191-0, dated 1962. Magnets T1 and T2 control the tilting of the print head and magnets R1, R2, R2a and R1 control the rotation of the print head.

Upon energizing a specific combination of these magnets, a particular print element of the print head is mechanically moved into printing position. In order to position the numeric character 9 into printing position, it is necessary to energize magnets T1, T2, R1, R5 and not magnets R2a and R2. If the magnets are energized as indicated, then a 9 is brought into print position. However, for example, if magnet R1 failed to be energized, for some reason, then the poun...