ZA71554B - Improvements in conversion aids - Google Patents

Improvements in conversion aids

Info

Publication number
ZA71554B
ZA71554B ZA710554A ZA71554A ZA71554B ZA 71554 B ZA71554 B ZA 71554B ZA 710554 A ZA710554 A ZA 710554A ZA 71554 A ZA71554 A ZA 71554A ZA 71554 B ZA71554 B ZA 71554B
Authority
ZA
South Africa
Prior art keywords
conversion aids
aids
conversion
Prior art date
Application number
ZA710554A
Inventor
D Robinson
Original Assignee
D Robinson
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 D Robinson filed Critical D Robinson
Priority to ZA710554A priority Critical patent/ZA71554B/en
Priority to AU38386/72A priority patent/AU468511B2/en
Priority to GB402772A priority patent/GB1345639A/en
Publication of ZA71554B publication Critical patent/ZA71554B/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/0005—Hand manipulated computing devices characterised by a specific application
    • G06G1/0073—Hand manipulated computing devices characterised by a specific application for commerce, bank or invoicing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/0005—Hand manipulated computing devices characterised by a specific application
    • G06G1/0068—Hand manipulated computing devices characterised by a specific application for conversion from one unit system to another, e.g. from British to metric
    • 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
    • G06G1/04—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction
    • G06G1/08—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction with circular or helical scales

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Calculators And Similar Devices (AREA)
  • Credit Cards Or The Like (AREA)
  • Mechanical Optical Scanning Systems (AREA)
ZA710554A 1971-01-28 1971-01-28 Improvements in conversion aids ZA71554B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ZA710554A ZA71554B (en) 1971-01-28 1971-01-28 Improvements in conversion aids
AU38386/72A AU468511B2 (en) 1971-01-28 1972-01-27 Improvements in conversion aids
GB402772A GB1345639A (en) 1971-01-28 1972-01-28 Conversion aids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA710554A ZA71554B (en) 1971-01-28 1971-01-28 Improvements in conversion aids

Publications (1)

Publication Number Publication Date
ZA71554B true ZA71554B (en) 1972-03-29

Family

ID=25562983

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA710554A ZA71554B (en) 1971-01-28 1971-01-28 Improvements in conversion aids

Country Status (3)

Country Link
AU (1) AU468511B2 (en)
GB (1) GB1345639A (en)
ZA (1) ZA71554B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654848B1 (en) * 1989-11-22 1994-08-26 Michel Dalmau DEVICE FOR EQUIVALENCE BETWEEN CURRENCIES.
FR2774491B1 (en) * 1998-02-04 2001-09-14 Jean Francois Jacques Auboin ANALOGUE SYSTEM ALLOWING SIMPLE CURRENCY CONVERSION ON WATCHES

Also Published As

Publication number Publication date
AU468511B2 (en) 1976-01-15
AU3838672A (en) 1973-08-02
GB1345639A (en) 1974-01-30

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