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Punch Error Detection

IP.com Disclosure Number: IPCOM000091329D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Jensen, DF: AUTHOR [+2]

Abstract

A pneumatic system for checking punch operation is provided by monitoring the movement of the interposer. A timed pressure pulse applied to diaphragm actuator 1 causes actuator lever 2 to rock counterclock, wise about its pivot point moving an extended portion 3 out of the path of interposer 4. The latter is pivotally mounted on interposer operating arm 12 which is spring-biased in a clockwise direction about its pivot.

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Punch Error Detection

A pneumatic system for checking punch operation is provided by monitoring the movement of the interposer. A timed pressure pulse applied to diaphragm actuator 1 causes actuator lever 2 to rock counterclock, wise about its pivot point moving an extended portion 3 out of the path of interposer 4. The latter is pivotally mounted on interposer operating arm 12 which is spring-biased in a clockwise direction about its pivot.

Arm 12 is provided with vane 5 positioned between jet stream 6 and receiver
7. When interposer 4 moves to the left to that its and is positioned between cam 8 and punch output rod 9, arm 12 to which vane 5 is fastened is shifted left allowing a positive pressure pulse 10 to appear at receiver 7.

Pulse 10, indicating a punch operation has occurred, is fed to the control input of diaphragm-controlled element B. The latter B is conditioned to respond correctly by periodic pressure pulses from Nor C that are fed through diaphragm- controlled element A into element B. If the latter is unblocked, it produces a negative pulse at the output of Nor D indicating an error. The memory unit generates a positive pulse each time a punch operation is to occur. The pulse is inverted and applied at element A. The negative pulse at element A then allows the positive pulse from Nor C to appear at element B. The positive pulse arriving at element B is blocked by pulse 10 from the punch and produces a negative output pulse. A negative pulse applie...