Browse Prior Art Database

Indicating Full Tape

IP.com Disclosure Number: IPCOM000091938D
Original Publication Date: 1968-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Andrews, DR: AUTHOR [+2]

Abstract

This apparatus is used with a keyboard recorder device to insure that proper codes are recorded at the end of a data tape by the machine operator. Data characters normally keyed from keyboard 1 are transmitted to logic circuit 2 and then recorded by transducer 3 on magnetic tape 4. Circuit 2 also transmits the keyed character to printer 5 which causes the character to be printed on sheet 6. End-of-tape sensor 7 senses the end of tape 4 prior to the time it reaches transducer 3. A end-of-tape signal is transmitted to circuit 2 which causes light 8 to become lit, thus warning the operator that the end of tape 4 is approaching. The operator can next record only a predetermined number of data characters prior to recording a tape termination sequence.

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Indicating Full Tape

This apparatus is used with a keyboard recorder device to insure that proper codes are recorded at the end of a data tape by the machine operator. Data characters normally keyed from keyboard 1 are transmitted to logic circuit 2 and then recorded by transducer 3 on magnetic tape 4. Circuit 2 also transmits the keyed character to printer 5 which causes the character to be printed on sheet 6. End-of-tape sensor 7 senses the end of tape 4 prior to the time it reaches transducer 3. A end-of-tape signal is transmitted to circuit 2 which causes light 8 to become lit, thus warning the operator that the end of tape 4 is approaching. The operator can next record only a predetermined number of data characters prior to recording a tape termination sequence. If the operator attempts to exceed the predetermined number of data characters, logic 2 causes light 9 to become lit and locks keyboard 1. The data character which exceeds the predetermined number is either printed by printer 5 nor recorded by transducer 3. The operator must then depress backspace key 10 to unlock keyboard 1 and then records the proper tape termination sequence. If the wrong tape termination sequence is attempted by the operator, again keyboard 1 is locked and the wrongly keyed character is not recorded. None of the tape termination sequence codes are printed by printer 5.

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