FR401990A - Improvements to slide rules - Google Patents

Improvements to slide rules

Info

Publication number
FR401990A
FR401990A FR401990DA FR401990A FR 401990 A FR401990 A FR 401990A FR 401990D A FR401990D A FR 401990DA FR 401990 A FR401990 A FR 401990A
Authority
FR
France
Prior art keywords
slide rules
rules
slide
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
Rudolph Charles Smith
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR401990A publication Critical patent/FR401990A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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)
FR401990D 1909-04-13 1909-04-13 Improvements to slide rules Expired FR401990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR401990T 1909-04-13

Publications (1)

Publication Number Publication Date
FR401990A true FR401990A (en) 1909-09-23

Family

ID=1446757

Family Applications (1)

Application Number Title Priority Date Filing Date
FR401990D Expired FR401990A (en) 1909-04-13 1909-04-13 Improvements to slide rules

Country Status (1)

Country Link
FR (1) FR401990A (en)

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