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Check Circuit for Data Perforator

IP.com Disclosure Number: IPCOM000098864D
Original Publication Date: 1958-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Trimble, LF: AUTHOR

Abstract

In operating a tape or card perforator for statistical data, it is desirable to check the actual mechanical operation of the punches. A split magnetic ring 10 is located adjacent the die section at each punch position. A punch 11 upon being operated enters the split in the ring and closes the magnetic circuit generating an output. A circuit which uses a signal from the perforator keyboard 12, and the output of the split ring to indicate a misoperation of the punch is shown. Although each punch position is provided with a split core 10 and an associated switching circuit, only a single position is illustrated.

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Check Circuit for Data Perforator

In operating a tape or card perforator for statistical data, it is desirable to check the actual mechanical operation of the punches. A split magnetic ring 10 is located adjacent the die section at each punch position. A punch 11 upon being operated enters the split in the ring and closes the magnetic circuit generating an output. A circuit which uses a signal from the perforator keyboard 12, and the output of the split ring to indicate a misoperation of the punch is shown. Although each punch position is provided with a split core 10 and an associated switching circuit, only a single position is illustrated.

The outputs of all positions operate a common error indicating circuit 15 through a driver 16 of conventional design, which is gated to accept inputs at test time only. Core 14 is normally in the 0 state. An output from the keyboard upon closure of a key will switch the corresponding core to a 1 condition. It will then be switched back to a 0 condition by the corresponding punch closing the magnetic circuit in ring 10. Should a punch fail to operate, the core 14 will be in a 1 condition. Closure of the test circuit will switch the core to the 0 condition producing an output which will be accepted by the gated .error circuitry.

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