GB1345639A - Conversion aids - Google Patents

Conversion aids

Info

Publication number
GB1345639A
GB1345639A GB402772A GB402772A GB1345639A GB 1345639 A GB1345639 A GB 1345639A GB 402772 A GB402772 A GB 402772A GB 402772 A GB402772 A GB 402772A GB 1345639 A GB1345639 A GB 1345639A
Authority
GB
United Kingdom
Prior art keywords
units
indicators
jan
bearing
base
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
GB402772A
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
Publication of GB1345639A publication Critical patent/GB1345639A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/0005—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)

Abstract

1345639 Conversions between unit systems D U ROBINSON 28 Jan 1972 [28 Jan 19711 4027/72 Heading G4B A device for making conversions between different systems of units comprises a base 14, bearing a circular logarithmic scale, and a disc 15, pivotal with respect to the base and bearing at least three indicators 16, the angular spacing of the indicators being such that they intersect values on the scale 14 corresponding to one and the same quantity expressed in different systems of units. Instead of the units of currency shown, the indicators may correspond to units of weight, area, length, volume, speed or pressure, Fig. 2 (not shown).
GB402772A 1971-01-28 1972-01-28 Conversion aids Expired GB1345639A (en)

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
GB1345639A true GB1345639A (en) 1974-01-30

Family

ID=25562983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB402772A Expired GB1345639A (en) 1971-01-28 1972-01-28 Conversion aids

Country Status (3)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654848A1 (en) * 1989-11-22 1991-05-24 Dalmau Michel Device for establishing the equivalents between currencies
FR2774491A1 (en) * 1998-02-04 1999-08-06 Jean Francois Jacques Auboin Watch mounted currency converter.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654848A1 (en) * 1989-11-22 1991-05-24 Dalmau Michel Device for establishing the equivalents between currencies
FR2774491A1 (en) * 1998-02-04 1999-08-06 Jean Francois Jacques Auboin Watch mounted currency converter.
EP0938056A1 (en) * 1998-02-04 1999-08-25 Jean-Francois Auboin Analog currency converter suitable for watches

Also Published As

Publication number Publication date
AU3838672A (en) 1973-08-02
ZA71554B (en) 1972-03-29
AU468511B2 (en) 1976-01-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee