GB560183A - Improvements in slide rules - Google Patents
Improvements in slide rulesInfo
- Publication number
- GB560183A GB560183A GB1335042A GB1335042A GB560183A GB 560183 A GB560183 A GB 560183A GB 1335042 A GB1335042 A GB 1335042A GB 1335042 A GB1335042 A GB 1335042A GB 560183 A GB560183 A GB 560183A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scale
- flow
- injection rate
- rate scale
- index mark
- 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
- G06G1/10—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation
- G06G1/12—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation logarithmic graduations, e.g. for multiplication
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
560,183. Calculating - apparatus. BLACKMORE, D. W., FRISELL, B., and WALLACE & TIERNAN, Ltd. Sept. 22, 1942, No. 13350. [Class 106 (i)] A slide rule for calculations relating to the addition of chlorine or other chemical reagent to water or other fluids has a treatment rate scale and an injection rate scale on one part and a water flow scale and index on the other part. The treatment rate scale a on the stock A represents the number of parts of the reagent to be added per million parts of the fluid and the injection rate scale b is expressed in gallons or pounds to be added per time unit. On the slide B opposite the treatment rate scale is arranged the flow scale c in gallons per hour' and opposite the injection rate scale is an index mark C shown as an arrow projecting from a rectangle. A fourth scale d representing a range of solution concentrations is provided on the slide to co-operate with the injection rate scale when graduated in gallons per unit time. Additional scales e, f and an index mark SC are provided to co-operate with the scale d for use in calculating the amount of reagent necessary to form a solution of a desired strength from a concentrate of known strength. Calcutations relating to the rate of flow can be effected by the provision of scales g, h and i representing capacity in gallons, pipe diameter and length respectively together with an index mark C. A time scale j may be provided for use in determining the time required for a unit of fluid to flow through a given length of pipe. An index mark V may be provided to co-operate with the injection rate scale b for determining the velocity of flow through the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1335042A GB560183A (en) | 1942-09-22 | 1942-09-22 | Improvements in slide rules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1335042A GB560183A (en) | 1942-09-22 | 1942-09-22 | Improvements in slide rules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560183A true GB560183A (en) | 1944-03-23 |
Family
ID=10021353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1335042A Expired GB560183A (en) | 1942-09-22 | 1942-09-22 | Improvements in slide rules |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB560183A (en) |
-
1942
- 1942-09-22 GB GB1335042A patent/GB560183A/en not_active Expired
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