FR553897A - Calculation circle device for quickly determining the results of simple business arithmetic operations - Google Patents

Calculation circle device for quickly determining the results of simple business arithmetic operations

Info

Publication number
FR553897A
FR553897A FR553897DA FR553897A FR 553897 A FR553897 A FR 553897A FR 553897D A FR553897D A FR 553897DA FR 553897 A FR553897 A FR 553897A
Authority
FR
France
Prior art keywords
results
arithmetic operations
circle device
quickly determining
simple business
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
Other languages
French (fr)
Inventor
Etienne-Louis
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 filed Critical
Application granted granted Critical
Publication of FR553897A publication Critical patent/FR553897A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand-manipulated computing devices
    • G06G1/02—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
    • G06G1/10—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation
    • G06G1/12—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation logarithmic graduations, e.g. for multiplication

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
FR553897D 1922-07-12 1922-07-12 Calculation circle device for quickly determining the results of simple business arithmetic operations Expired FR553897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR553897T 1922-07-12

Publications (1)

Publication Number Publication Date
FR553897A true FR553897A (en) 1923-06-01

Family

ID=8938520

Family Applications (1)

Application Number Title Priority Date Filing Date
FR553897D Expired FR553897A (en) 1922-07-12 1922-07-12 Calculation circle device for quickly determining the results of simple business arithmetic operations

Country Status (1)

Country Link
FR (1) FR553897A (en)

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