GB589063A - An improved mathematical data indicator - Google Patents
An improved mathematical data indicatorInfo
- Publication number
- GB589063A GB589063A GB2213844A GB2213844A GB589063A GB 589063 A GB589063 A GB 589063A GB 2213844 A GB2213844 A GB 2213844A GB 2213844 A GB2213844 A GB 2213844A GB 589063 A GB589063 A GB 589063A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cursor
- disc
- lines
- tangential
- data indicator
- 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
Abstract
589,063. Tabular calculators. HARTLEY, S. Dec. 10, 1944, No. 22138. [Class 106 (i)] A mathematical data indicator comprises a disc 10, divided by concentric circles 14 into zones of annular or part annular form, across which rows of co-related data c are marked in narrow spaces which are definable by curved lines, or by straight lines tangential to a circle concentric with the disc and of substantial diameter. A cursor 22 is pivotally mounted concentrically with the circles 14 and its operative edge 21 is shaped to correspond with the curvature of the curved lines or the tangential lines. In the embodiment described, the indicator bears a table of trigonometrical functions in four sections-two on each side of the disc. A right-angled triangle, and a table 26, giving the methods of solving the triangle for all cases, may be printed on the cursor 22, which may be provided with guides 27 for an auxiliary cursor 29 to facilitate reference to the tables. A second auxiliary cursor 32 may be slidably mounted on the cursor 29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2213844A GB589063A (en) | 1944-12-10 | 1944-12-10 | An improved mathematical data indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2213844A GB589063A (en) | 1944-12-10 | 1944-12-10 | An improved mathematical data indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB589063A true GB589063A (en) | 1947-06-10 |
Family
ID=10174501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2213844A Expired GB589063A (en) | 1944-12-10 | 1944-12-10 | An improved mathematical data indicator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB589063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
-
1944
- 1944-12-10 GB GB2213844A patent/GB589063A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
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