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Browse Prior Art Database

Card Jam Detector

IP.com Disclosure Number: IPCOM000093092D
Original Publication Date: 1967-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Wilcox, WL: AUTHOR

Abstract

If any transducer 10 fails to generate a pulse between reset and check time, a jam condition exists. Record card 15 is transported between endless belt 20 and drive rolls 25 relative to stackers 17 and 18. Belt 20 is continuously driven. Pressure between belt 20 and rolls 25 is created by causing 20 to wrap rolls 25 for a small angle by pressure rolls 21. Thus in the absence of card 15, rolls 25 are driven by belt 20. Otherwise, rolls 25 are driven by card 15. Rolls 25 are provided with a suitable number of accurately spaced magnetic inserts 26. These cause transducer 10 to generate pulses as rolls 25 rotate.

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Card Jam Detector

If any transducer 10 fails to generate a pulse between reset and check time, a jam condition exists. Record card 15 is transported between endless belt 20 and drive rolls 25 relative to stackers 17 and 18. Belt 20 is continuously driven. Pressure between belt 20 and rolls 25 is created by causing 20 to wrap rolls 25 for a small angle by pressure rolls 21. Thus in the absence of card 15, rolls 25 are driven by belt 20. Otherwise, rolls 25 are driven by card 15. Rolls 25 are provided with a suitable number of accurately spaced magnetic inserts 26. These cause transducer 10 to generate pulses as rolls 25 rotate.

Deflectors 30 are selectively operable to deflect cards 15 into stackers 17 and 18. If a card 15 fails to move, one or more rolls 25 stop. When any roll 25 stops, the associated transducer 10 fails to generate pulses. Detection circuit 35 is operable to generate a stacker transport jam signal if any roll 25 stops.

Latches 36 are repeatedly reset by reoccurring reset pulses and are connected to be set by pulses from transducers 10. Or 37 provides a signal to And 38 if any latch 36 is in the reset state at check pulse time. If this occurs, then And 38 passes a stacker transport jam signal to indicate a card jam, a broken or loose belt 20, or a locked roll 25.

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