IBM 513

The IBM 513 Reproducing Punch ( [http://ed-thelen.org/1401Project/513FrontSide-.jpgphoto] ) was a card punching machine developed by IBM. The machine could perform these functions:

* Reproducing all or part of the data on a deck of punched cards.
* Gang punching -- copying punched information from a master card.
* Summary punching -- punching a total or new balance card amounts which have been accumulated in the accounting machine.
* Mark sensing -- the operation by which information recorded in the form of pencil marks is turned into punches on the cards.

Mark sensing allowed a person to enter data to be used in punched-card data processing without using a keypunch machine. It was used for tasks such as recording long distance calls or electric meter readings.

Unlike other types of IBM unit record equipment, the 513 fed cards face down 12 edge first. The advantage of this was worn out decks from other equipment (which fed cards face down 9 edge first), having frayed 9 edges would still feed reliably through the reproducer, allowing a fresh copy to be made.

References

*cite book
last = IBM
title = IBM Electric Punched Card Accounting Machines, Principles of Operation, Reproducing Punches 513 and 514
date = 1945
*cite book
last = IBM
title = IBM Reference Manual: 513, 514 Reproducing Punches
date = October, 1959
id = A24-1002-2
url = http://www.bitsavers.org/pdf/ibm/cardProc/A24-1002-2_513-514_reprPun.pdf

External links

* [http://www.columbia.edu/acis/history/reproducer.html Columbia University Computing History: IBM Reproducing/Summary Punches] .