Browse Prior Art Database

Asynchronous Control Circuitry

IP.com Disclosure Number: IPCOM000093964D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Kerr, JW: AUTHOR [+2]

Abstract

Collating machine 10 is a synchronously operated machine with timing provided by a magnetic pulse generator 11. Heretofore, oscillator 12 is permitted to run only at a specific time after cards 13 and 14 are read by sensing brushes 15 and 16 respectively. Specifically, this takes place at G 13 time of generator 11. However, card reading is completed at the end of G 12 time. Thus, in the completely synchronously operated machine 10, there is a dead time between the end of card reading and oscillator start. The speed of 10 can be increased by eliminating this dead time. This is accomplished by turning 12 on as soon as the card reading function is completed. Further, it has been the practice to operate pocket control 20 and clutch control 21 only at a specific generated pulse time after oscillator 12 is turned off.

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Asynchronous Control Circuitry

Collating machine 10 is a synchronously operated machine with timing provided by a magnetic pulse generator 11. Heretofore, oscillator 12 is permitted to run only at a specific time after cards 13 and 14 are read by sensing brushes 15 and 16 respectively. Specifically, this takes place at G 13 time of generator
11. However, card reading is completed at the end of G 12 time. Thus, in the completely synchronously operated machine 10, there is a dead time between the end of card reading and oscillator start. The speed of 10 can be increased by eliminating this dead time. This is accomplished by turning 12 on as soon as the card reading function is completed. Further, it has been the practice to operate pocket control 20 and clutch control 21 only at a specific generated pulse time after oscillator 12 is turned off. This results in another dead time. In this arrangement, pocket control 20 and clutch control 21 are activated as soon as oscillator 12 turns off.

In order to appreciate this asynchronous operation of the otherwise synchronously controlled machine 10, data sensed by 15 and 16 from cards 13 and 14 is transferred into data storage not shown. The data is then read out and relocated in storage to facilitate the sequence and cross-compare operations of a collator. Card feeding is under clutch control 21 and selection of cards into pockets 23...27 is under control of 20.

At the beginning of G 12 time which is the last read pulse fo...