GB358212A - Improvements in or relating to calculating devices - Google Patents

Improvements in or relating to calculating devices

Info

Publication number
GB358212A
GB358212A GB2554730A GB2554730A GB358212A GB 358212 A GB358212 A GB 358212A GB 2554730 A GB2554730 A GB 2554730A GB 2554730 A GB2554730 A GB 2554730A GB 358212 A GB358212 A GB 358212A
Authority
GB
United Kingdom
Prior art keywords
scale
inner circle
relating
percentages
representing
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
GB2554730A
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
Priority to GB2554730A priority Critical patent/GB358212A/en
Publication of GB358212A publication Critical patent/GB358212A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

358,212. Calculating-apparatus. CROSS, E., 1, Cedars Road, Clapham Common, London. Aug. 27, 1930, No. 25547. [Class 106 (i).] Slide-rules.-A device of disc form for calculations relating to amounts, weights and prices and percentages comprises a rotatable disc with a scale A representing quantity or weight divided into fifteen parts, a concentric scale B representing monetary units arranged in two circles the outer of which has markings sixteen times as great or one-sixteenth of those of the inner circle, and a transparent cursor F with a central radial reading line. The scale A is provided with an index arrow G and an inner circle of graduations is provided for determining percentages.
GB2554730A 1930-08-27 1930-08-27 Improvements in or relating to calculating devices Expired GB358212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2554730A GB358212A (en) 1930-08-27 1930-08-27 Improvements in or relating to calculating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2554730A GB358212A (en) 1930-08-27 1930-08-27 Improvements in or relating to calculating devices

Publications (1)

Publication Number Publication Date
GB358212A true GB358212A (en) 1931-10-08

Family

ID=10229451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2554730A Expired GB358212A (en) 1930-08-27 1930-08-27 Improvements in or relating to calculating devices

Country Status (1)

Country Link
GB (1) GB358212A (en)

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