Browse Prior Art Database

Verification for Circulating Storage

IP.com Disclosure Number: IPCOM000094559D
Original Publication Date: 1965-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 3 page(s) / 42K

Publishing Venue

IBM

Related People

Sih, KY: AUTHOR

Abstract

This apparatus verifies a permanent record which is stored on a revolver 10. The latter can be a magnetic drum, magnetic disk, or a magnetic tape loop. There are two buffer storage tracks, revolver 1 and revolver 2. Read and write heads are placed apart on revolvers 1 and 2 resulting in two closed recirculating storage loops. Two special characters A and Z are used to indicate the beginning and end of a record, respectively.

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Verification for Circulating Storage

This apparatus verifies a permanent record which is stored on a revolver 10. The latter can be a magnetic drum, magnetic disk, or a magnetic tape loop. There are two buffer storage tracks, revolver 1 and revolver 2. Read and write heads are placed apart on revolvers 1 and 2 resulting in two closed recirculating storage loops. Two special characters A and Z are used to indicate the beginning and end of a record, respectively.

The record stored in permanent storage 10 is read via Or 12 and is written onto revolver 1. The same record is read from revolver 1 and shifted into register 1, out of register 1 into register 2, and out of 2 via And 16 through Or 12 to revolver 1. The read-write circuitry associated with storage 10 is not shown. It is similar to that used in conjunction with revolvers 1 and 2.

The record to be verified continuously circulates in the path comprising revolver 1, register 1, register 2, And 16, and Or 12. Detector 52 decodes the output of register 2. When the beginning of character A is shifted into register 2, the output of A detector 52 energizes And 54. This causes a similar A character from keyboard 18 to be shifted into buffer register 20. This A character is written via And 22 and Or 24 onto revolver 2. At the same time, a Z character is generated by Z generator 50 and is stored in register 4. The Z character stored in register 4 is detected by Z detector 28. This energizes the other leg of And 22 to allow the A character to be written onto revolver 2. The Z character is then transferred from register 4 immediately following the A character and is recorded on revolver 2. The A and Z characters are continuously read from revolver 2 to register 3, shifted from this to register 4, shifted from 4 via Or 22 and rewritten onto revolver 2.

To verify the particular record which has been temporarily stored in revolver 1 from its permanent position on record 10, the operator repeats the data of the record by keying the data into keyboard 18. The keyboard entry is temporarily stored in register 20 and is blocked from being written on revolver 2 by And 22. When the Z character stored in revolver 2 is detected in register 4 by detec...