GB177796A - Improvements in and relating to calculating machines - Google Patents
Improvements in and relating to calculating machinesInfo
- Publication number
- GB177796A GB177796A GB9197/22A GB919722A GB177796A GB 177796 A GB177796 A GB 177796A GB 9197/22 A GB9197/22 A GB 9197/22A GB 919722 A GB919722 A GB 919722A GB 177796 A GB177796 A GB 177796A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- graduated
- spiral
- discs
- scales
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
177,796. Odier, A. I. March 31, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Slide-rules of the flat-spiral kind graduated for use in connection with monetary exchange,. wages or costs, comprises discs 1, 2, bearing on the outer faces spirals logarithmically graduated with double scales of, say francs and centimes. and pounds, shillings and pence, and mounted to turn relatively to each other in a clamp 5, having index pointers 6, 7. On the inner face,. the disc 1 has a circular logarithmic scale of rates of exchange, visible through an opening 4 in the disc 2 with markings on the rim, so that the discs may be set according to the current rate. The two spiral scales may be placed on opposite faces of a single disc, two centrally-pivoted pointers being provided to co-operate with them. Microscopes may be mounted on the instrument to increase reading accuracy.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE177796X | 1921-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB177796A true GB177796A (en) | 1923-06-07 |
Family
ID=3864269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9197/22A Expired GB177796A (en) | 1921-03-31 | 1922-03-30 | Improvements in and relating to calculating machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB177796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2684202A (en) * | 1953-02-26 | 1954-07-20 | Giuntini Roland | Foreign money value calculating device |
-
1922
- 1922-03-30 GB GB9197/22A patent/GB177796A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2684202A (en) * | 1953-02-26 | 1954-07-20 | Giuntini Roland | Foreign money value calculating device |
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