Browse Prior Art Database

Automatic Duplexing for Data Processors

IP.com Disclosure Number: IPCOM000084373D
Original Publication Date: 1975-Nov-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Brady, RL: AUTHOR [+3]

Abstract

The drawing shows the interconnections used to provide a transfer of a function from one data processing system to another automatically, and to indicate by lights and/or bells that the transfer occurred. In the event of failure of both systems, a major alarm is activated and a reset is provided for the attached function.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 83% of the total text.

Page 1 of 2

Automatic Duplexing for Data Processors

The drawing shows the interconnections used to provide a transfer of a function from one data processing system to another automatically, and to indicate by lights and/or bells that the transfer occurred. In the event of failure of both systems, a major alarm is activated and a reset is provided for the attached function.

In operation, the prime system 1 normally controls the attached function (e.g., a toll ticketing system 2) by the digital output (DO) and digital input (DI) features on the system. These DI/DO features are connected to the attached function 2 by a transfer switch 5.

A backup system 13 with DI/DO features is also connectable to the toll ticketing system 2 by switch 5. The systems 1 and 13 preferably utilize IBM System/7 processors.

The transfer switch 5 is activated by transfer controls 6. The transfer controls 6 test the condition of the status detectors 7 and 8 and connect operating system 1 or 13 to the attached function 2. If the status detectors 7 and 8 indicate a failure condition, they activate alarm bell control 9 and alarm light controls 10 or 11.

If both status detectors 7 and 8 indicate a failure, an alarm light control 12 is activated to show a major alarm condition and to cause a reset (if desired) of the attached function 2. The alarm bell 9 has a manual cutoff 14 which stops the bell but leaves the actuated alarm light operating. The manual cutoff 14 automatically resets upon clearance of the...