Browse Prior Art Database

Historical Scanner

IP.com Disclosure Number: IPCOM000097729D
Original Publication Date: 1961-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Jordan, EI: AUTHOR

Abstract

The historical scanner monitors a data processing machine and provides a complete history of the machine condition for a given number of operations prior to the one being performed.

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Historical Scanner

The historical scanner monitors a data processing machine and provides a complete history of the machine condition for a given number of operations prior to the one being performed.

The circuit includes a memory unit 10 using bistable magnetic core elements
12. Each core 12 (upper left) is linked in the same sense with a single turn by drive winding 14 and scanner winding 16. Each of these windings is effective when energized to half-select the core. The combined energization of these two windings is effective to switch the core at their intersection to the stable state. Each core 12 is also linked in the opposite sense with two turns by a dashed reset winding 18. This winding is effective when energized to switch the core to the 0 stable state.

The cores 12 are arranged in N word groups of X cores each. N is shown equal to ten and X is equal to the number of machine indicators of computer 20 being monitored. The drive winding for each word is energized by a driver 22 which also energizes the reset winding 18 of the next succeeding word. Drivers 22 are selectively triggered in a time sequence by stepping ring 24 which is driven by pulse source 26. At the same time 26 is driving 24, it also triggers scanner 28 to sample all the machine indicators of computer 20 at the given instant.

Output signals representing the status of the various scanned indicators are transmitted through the scanning unit to lines 16. The simultaneous occurrence of signal...