GB1309571A - Calculating machines - Google Patents

Calculating machines

Info

Publication number
GB1309571A
GB1309571A GB1309571DA GB1309571A GB 1309571 A GB1309571 A GB 1309571A GB 1309571D A GB1309571D A GB 1309571DA GB 1309571 A GB1309571 A GB 1309571A
Authority
GB
United Kingdom
Prior art keywords
machine
key
keyboard
program
sequence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUMLOCK ANITA ELECTRONICS Ltd
Original Assignee
SUMLOCK ANITA ELECTRONICS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SUMLOCK ANITA ELECTRONICS Ltd filed Critical SUMLOCK ANITA ELECTRONICS Ltd
Publication of GB1309571A publication Critical patent/GB1309571A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

1309571 Digital computers; key entry SUMLOCK ANITA ELECTRONICS Ltd 19 April 1971 [17 Feb 1970] 7526/70 Heading G4A A keyboard operated digital electric calculating machine 3 as described in Specifications 1,261,710 and 1,282,770 can operate in two modes: (i) Under contol of keys from keyboard 1 which enter instructions (or data) into the machine via an interface 2. (ii) On actuation of a start program key which causes sequential actuation of a read only microprogram memory 5 (a removable diode matrix board or boards) to produce digital signals similar to the key entered signals for control of the machine 3 via the interface 2. The digital signals simulate a sequence of operations of keys on the keyboard. (i) Keyboard control.-The machine operates as in the prior mentioned patents. (ii) Machine control.-When the program start key is depressed the keyboard output is inhibited (Fig. 2a, not shown), a program lamp is lit, and divided by ten counters 130, 131 are pulsed and these pulse the left most line 133 of diode matrix 139 which causes a group of 5 digital signals (representing an instruction) to be sent to the machine via lines AS-ES. When the machine has completed this instruction the second line 133 is energized and so on for up to 100 lines. At intervals during the program this sequence can be interrupted for entry of data by actuation of a key and then the sequence is returned to. The sequence can also be terminated at any point using a reset program key.
GB1309571D 1970-02-17 1970-02-17 Calculating machines Expired GB1309571A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB752670 1970-02-17

Publications (1)

Publication Number Publication Date
GB1309571A true GB1309571A (en) 1973-03-14

Family

ID=9834821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1309571D Expired GB1309571A (en) 1970-02-17 1970-02-17 Calculating machines

Country Status (5)

Country Link
AU (1) AU2555471A (en)
CA (1) CA941509A (en)
DE (1) DE2107614A1 (en)
GB (1) GB1309571A (en)
NL (1) NL7102115A (en)

Also Published As

Publication number Publication date
NL7102115A (en) 1971-08-19
DE2107614A1 (en) 1971-09-02
CA941509A (en) 1974-02-05
AU2555471A (en) 1972-08-24

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees