GB1495521A - Device for mechanically assisting calculation - Google Patents

Device for mechanically assisting calculation

Info

Publication number
GB1495521A
GB1495521A GB273574A GB273574A GB1495521A GB 1495521 A GB1495521 A GB 1495521A GB 273574 A GB273574 A GB 273574A GB 273574 A GB273574 A GB 273574A GB 1495521 A GB1495521 A GB 1495521A
Authority
GB
United Kingdom
Prior art keywords
circular
plate
base
scales
grid
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
GB273574A
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB273574A priority Critical patent/GB1495521A/en
Publication of GB1495521A publication Critical patent/GB1495521A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

1495521 Calculating apparatus BRITISH STEEL CORP 21 Jan 1975 [21 Jan 1974] 02735/74 Heading G4B A device for mechanically assisting calculation comprises a circular base-plate 10, a grid 11 which may be printed on paper or plastics material retained on the base-plate, in a circular recessed portion thereof, a circular transparent plate 12 having a diameter less than the recess and located above said grid in said recessed portion and pivotally attached to the base-plate by a pin 15, said transparent plate being permanently marked with four concentric circular scales 16, 17, 18 and 19 and being receptive to a marking instrument such as a pencil or a pen, and a pointer element 21 adjustably attached to an arm 22 pivotally secured to the base of the base-plate 10 by the pin 15. The grid 11 is marked with a prominent diametric datum line 13. The pointer element 21 may be adjusted to point to any one of said four concentric circular scales. A transparent shelf 28 of the arm 22 extends over the four circular scales and is provided with four arcuate scales with divisions corresponding to eighths of a division of the respective circular scales. Vectors may be represented by lines drawn on the transparent plate 12 using the grid to measure the length of such lines and the circular scales to determine their direction and the device is particularly useful as an aid to calculation in the dynamic balancing of rotating machinery.
GB273574A 1975-01-21 1975-01-21 Device for mechanically assisting calculation Expired GB1495521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB273574A GB1495521A (en) 1975-01-21 1975-01-21 Device for mechanically assisting calculation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB273574A GB1495521A (en) 1975-01-21 1975-01-21 Device for mechanically assisting calculation

Publications (1)

Publication Number Publication Date
GB1495521A true GB1495521A (en) 1977-12-21

Family

ID=9744903

Family Applications (1)

Application Number Title Priority Date Filing Date
GB273574A Expired GB1495521A (en) 1975-01-21 1975-01-21 Device for mechanically assisting calculation

Country Status (1)

Country Link
GB (1) GB1495521A (en)

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Legal Events

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