Browse Prior Art Database

Magnetic Tape Unit

IP.com Disclosure Number: IPCOM000096545D
Original Publication Date: 1963-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Ghertman, J: AUTHOR

Abstract

The tape is divided into two parts. One bears the data from a previous updating. The other receives the data from the new updating. Such is calculated by a data processing machine from data read from the first part and from modifying data proceeding from other sources such as punched cards or movement tape. During a following updating operation, the functions of the two parts are interchanged. The data having registered on the second part is now used for the new calculations, the results of which are registered on the first part.

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Magnetic Tape Unit

The tape is divided into two parts. One bears the data from a previous updating. The other receives the data from the new updating. Such is calculated by a data processing machine from data read from the first part and from modifying data proceeding from other sources such as punched cards or movement tape. During a following updating operation, the functions of the two parts are interchanged. The data having registered on the second part is now used for the new calculations, the results of which are registered on the first part.

A magnetic head in case of the series coding system or a set of magnetic heads in case of parallel system is associated with each part of the tape. In the first case, one of the heads is movable parallel to the movement of the tape. In the second case, a complete set is movable. For each operation, the reading heads are set ahead of the writing heads. The relative displacement corresponds to the time necessary for the transfers and calculations.

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