GB1262860A - Improvements in or relating to calculating machines - Google Patents

Improvements in or relating to calculating machines

Info

Publication number
GB1262860A
GB1262860A GB3392368A GB3392368A GB1262860A GB 1262860 A GB1262860 A GB 1262860A GB 3392368 A GB3392368 A GB 3392368A GB 3392368 A GB3392368 A GB 3392368A GB 1262860 A GB1262860 A GB 1262860A
Authority
GB
United Kingdom
Prior art keywords
function
counter
circuit
energized
july
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
GB3392368A
Inventor
Norbert Kitz
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.)
Bell Punch Co Ltd
Original Assignee
Bell Punch Co 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 Bell Punch Co Ltd filed Critical Bell Punch Co Ltd
Priority to GB3392368A priority Critical patent/GB1262860A/en
Priority to CA056312A priority patent/CA929670A/en
Priority to NL6910888A priority patent/NL6910888A/xx
Priority to DE19691936221 priority patent/DE1936221C/en
Publication of GB1262860A publication Critical patent/GB1262860A/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)
  • Measurement Of Unknown Time Intervals (AREA)
  • Calculators And Similar Devices (AREA)

Abstract

1,262,860. Digital calculator. BELL PUNCH CO. Ltd. 7 July, 1969 [16 July, 1968], No. 33923/68. Heading G4A. A digital calculator as described in Specification 1,261,710, has modifications relating to its function counter circuit. A function keyboard 8 has a number of keys representing various functions or programme operations of the machine, e.g. add, enter &c., depression of a key causing generation of a signal unique to that function. The signal is a repetitively transmitted pulse of duration depending on the function and a digit keyboard is also provided. A function counter 10 is a decade counter having eight states corresponding to eight functions F0 to F7 which are connected to respective emitter followers 10c which in turn are connected to the function circuit by diode resistor AND gates (Fig. 2, not shown). When a counter state is energized a voltage is applied by the emitter follower to enable the AND gate and hence the function circuit. If the state is not energized the AND gate is not enabled and the function circuit is isolated.
GB3392368A 1968-07-16 1968-07-16 Improvements in or relating to calculating machines Expired GB1262860A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3392368A GB1262860A (en) 1968-07-16 1968-07-16 Improvements in or relating to calculating machines
CA056312A CA929670A (en) 1968-07-16 1969-07-07 Calculating machines
NL6910888A NL6910888A (en) 1968-07-16 1969-07-15
DE19691936221 DE1936221C (en) 1968-07-16 1969-07-16 Electronic calculating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3392368A GB1262860A (en) 1968-07-16 1968-07-16 Improvements in or relating to calculating machines

Publications (1)

Publication Number Publication Date
GB1262860A true GB1262860A (en) 1972-02-09

Family

ID=10359165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3392368A Expired GB1262860A (en) 1968-07-16 1968-07-16 Improvements in or relating to calculating machines

Country Status (3)

Country Link
CA (1) CA929670A (en)
GB (1) GB1262860A (en)
NL (1) NL6910888A (en)

Also Published As

Publication number Publication date
NL6910888A (en) 1970-01-20
CA929670A (en) 1973-07-03
DE1936221A1 (en) 1970-01-22
DE1936221B2 (en) 1973-02-01

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