GB285322A - Improvements in logarithmic calculating apparatus - Google Patents
Improvements in logarithmic calculating apparatusInfo
- Publication number
- GB285322A GB285322A GB2120227A GB2120227A GB285322A GB 285322 A GB285322 A GB 285322A GB 2120227 A GB2120227 A GB 2120227A GB 2120227 A GB2120227 A GB 2120227A GB 285322 A GB285322 A GB 285322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- pairs
- shaft
- calculating apparatus
- fiacchi
- 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
- G06G1/02—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
- G06G1/085—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 borne by a cylinder
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Cultivation Of Plants (AREA)
Abstract
285,322. Fiacchi, F. Aug. 11, 1927. Slide-rules of cylindrical form for effecting calculations relating to ferro-concrete structures. A cylinder bea.rs a number of pairs of scales denoting the useful height and the area of slabs or sections, based on different coefficients and read selectively at windows 12 - - 15 slidably adjusted accordingly by a finger-piece 16. The cylinder is rotated to add the logarithms of the various factors by means of graduated rings two of which namely 5, 5<1> are secured.to the cylinder shaft while the other two pairs are only frictionally held to the shaft to allow preliminary relative adjustment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2120227A GB285322A (en) | 1927-08-11 | 1927-08-11 | Improvements in logarithmic calculating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2120227A GB285322A (en) | 1927-08-11 | 1927-08-11 | Improvements in logarithmic calculating apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB285322A true GB285322A (en) | 1928-02-16 |
Family
ID=10158892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2120227A Expired GB285322A (en) | 1927-08-11 | 1927-08-11 | Improvements in logarithmic calculating apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB285322A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2710142A (en) * | 1946-08-13 | 1955-06-07 | George R Stibitz | Film type of slide rule |
-
1927
- 1927-08-11 GB GB2120227A patent/GB285322A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2710142A (en) * | 1946-08-13 | 1955-06-07 | George R Stibitz | Film type of slide rule |
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