CH374224A - Desktop calculator - Google Patents

Desktop calculator

Info

Publication number
CH374224A
CH374224A CH5025257A CH5025257A CH374224A CH 374224 A CH374224 A CH 374224A CH 5025257 A CH5025257 A CH 5025257A CH 5025257 A CH5025257 A CH 5025257A CH 374224 A CH374224 A CH 374224A
Authority
CH
Switzerland
Prior art keywords
desktop calculator
calculator
desktop
Prior art date
Application number
CH5025257A
Other languages
German (de)
Inventor
Kitz Norbert
Watkins Sparrow Vernon
Milburn Robert
Frederick Webb Christopher
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
Priority claimed from GB2738356A external-priority patent/GB868753A/en
Application filed by Bell Punch Co Ltd filed Critical Bell Punch Co Ltd
Publication of CH374224A publication Critical patent/CH374224A/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/491—Computations with decimal numbers radix 12 or 20.
    • G06F7/498—Computations with decimal numbers radix 12 or 20. using counter-type accumulators
    • G06F7/4981—Adding; Subtracting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00—Input mechanisms
    • G06C7/02—Keyboards
    • G06C7/06—Keyboards with one set of keys for each denomination
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/46—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using electromechanical counter-type accumulators
    • G06F7/461—Adding; subtracting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/491—Computations with decimal numbers radix 12 or 20.
    • G06F7/498—Computations with decimal numbers radix 12 or 20. using counter-type accumulators
    • G06F7/4983—Multiplying; Dividing
    • G06F7/4985—Multiplying; Dividing by successive additions or subtractions

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Input From Keyboards Or The Like (AREA)
CH5025257A 1956-09-06 1957-09-06 Desktop calculator CH374224A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2738356A GB868753A (en) 1956-09-06 1956-09-06 Improvements in or relating to calculating machines
GB3579756 1956-11-22
GB2110557 1957-07-03

Publications (1)

Publication Number Publication Date
CH374224A true CH374224A (en) 1963-12-31

Family

ID=27257978

Family Applications (5)

Application Number Title Priority Date Filing Date
CH5025357A CH374225A (en) 1956-09-06 1957-09-06 Adding machine
CH5025257A CH374224A (en) 1956-09-06 1957-09-06 Desktop calculator
CH5025457A CH374226A (en) 1956-09-06 1957-09-06 Key operated office calculating machine
CH5025557A CH374227A (en) 1956-09-06 1957-09-06 Adding machine
CH5025157A CH374223A (en) 1956-09-06 1957-09-06 Desktop calculator

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CH5025357A CH374225A (en) 1956-09-06 1957-09-06 Adding machine

Family Applications After (3)

Application Number Title Priority Date Filing Date
CH5025457A CH374226A (en) 1956-09-06 1957-09-06 Key operated office calculating machine
CH5025557A CH374227A (en) 1956-09-06 1957-09-06 Adding machine
CH5025157A CH374223A (en) 1956-09-06 1957-09-06 Desktop calculator

Country Status (2)

Country Link
CH (5) CH374225A (en)
DK (1) DK105892C (en)

Also Published As

Publication number Publication date
CH374225A (en) 1963-12-31
CH374227A (en) 1963-12-31
DK105892C (en) 1966-11-21
CH374226A (en) 1963-12-31
CH374223A (en) 1963-12-31

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