GB1495521A - Device for mechanically assisting calculation - Google Patents
Device for mechanically assisting calculationInfo
- 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
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.
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) |
-
1975
- 1975-01-21 GB GB273574A patent/GB1495521A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |