Plugboards
Home Up Set Of Plugboards IBM 444 IBM 609 IBM 519 IBM 513 IBM 513. IBM 519

 

 

Plugboards Used for Programming the Machines

Plugboard for Tabulator IBM 444

 

The programming of punched card machines was usually done by plugboards. The operation of the machine was controlled by connecting wires on plugboard. E.g. the location of the information fields on the card that were desired to be summed up and the location where the result should be perforated on the card.

Set of Plugboards

 

Plugboards were usually different and their size was different on different types of machines. Plugboards were fixed for each machine for recurring tasks or dismountable and re-connectable for temporary tasks.
Some persons showed up to be real masters on programming these plugboards. They were able to perform quite complicated and amazing tasks on punched card machines just by connecting these wires. 

Plugboard for Tabulator IBM 444

Plugboard for Tabulator IBM 444

Plugboard for IBM 609 Calculator

Plugboard for IBM 609 Calculator

This program has been used to perform tax deduction calculations.

Plugboard for IBM 519

Plugboard for IBM 519

This program has been used for recognizing Mark Sensing lines from payment cards.

Plugboard for IBM 513

Plugboard for IBM 513

"Total Disaster".
Each column and perforation is copied from one stack of cards to another.

Plugboard for IBM 513

Plugboard for IBM 513

This program was used to copy perforations from first card to all following cards on stack. 

Plugboard for IBM 519

Plugboard for IBM 519

This is a fixed plugboard from the backside. Silver coated connecting parts can be seen in the picture. 

 

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