GB309309A - An appliance for computing and indicating the effect of load and ballast on the draft and trim of marine vessels - Google Patents
An appliance for computing and indicating the effect of load and ballast on the draft and trim of marine vesselsInfo
- Publication number
- GB309309A GB309309A GB1052728A GB1052728A GB309309A GB 309309 A GB309309 A GB 309309A GB 1052728 A GB1052728 A GB 1052728A GB 1052728 A GB1052728 A GB 1052728A GB 309309 A GB309309 A GB 309309A
- Authority
- GB
- United Kingdom
- Prior art keywords
- draft
- load
- scales
- chart
- trim
- 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
- G06G1/14—Hand manipulated computing devices in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
309,309. Weir, S. G. April 10, 1928. Calculatin.g-apparat2cs. - An appliance for ascertaining the effect of load and ballast on the draft and trim of marine vessels comprises a chart provided with draft and tonnage scales and having strings, rods or other indicators adapted to show the load, draft and trim when adjusted in relation to the scales. As shown in Figs. 1 and 2, a panel or frame 1 bears a squared chart 2, a tonnage scale a disposed in the middle of the chart, and side scales b of draft representing submergence at the bow and stern of the vessel. The scales are set in accordance with the rates of submergence in inches per ton of the ship and may read up to total tonnage and full draft. The scales, however, as shown are interchangeable the graduations being formed on tapes 4 passing around guide rollers to spools 6 on shafts 10 with squared ends 11 for operation by a key or handle. The tapes are kept taut by friction blocks 7 mounted on adjustable spring blades 8. To facilitate the choice of scales for a particular rate of submergence a table as shown in Fig. 6 is provided, the tonnage scale numbers being arranged across the top and bottom and the draft scale numbers down the sides, the space enclosed thereby being divided into squares and marked with the rates. Above the chart is arranged a number of indicators constituted of elastic string 12 connected at the ends to sliders 13 working in grooves 14 on the frame 1. The chart is provided with an auxiliary chart marked with a curve c from which the effect of a given load on the trim of the vessel can be read when the distance of the centre of gravity of the load from the mid-line of the ship is known. The curve may be plotted from results obtained by observation on a given load or by the formula 420<W>/A(1+6.91<Wh>/A) = S where A = Area of water plane of the vessel h = distance from the mid-ship section S = the submergence at the end towards which the load is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1052728A GB309309A (en) | 1928-04-10 | 1928-04-10 | An appliance for computing and indicating the effect of load and ballast on the draft and trim of marine vessels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1052728A GB309309A (en) | 1928-04-10 | 1928-04-10 | An appliance for computing and indicating the effect of load and ballast on the draft and trim of marine vessels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB309309A true GB309309A (en) | 1929-04-11 |
Family
ID=9969459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1052728A Expired GB309309A (en) | 1928-04-10 | 1928-04-10 | An appliance for computing and indicating the effect of load and ballast on the draft and trim of marine vessels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB309309A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2546641A (en) * | 1947-07-01 | 1951-03-27 | Francisco J Llanso | Draft calculator |
| US3409216A (en) * | 1967-04-18 | 1968-11-05 | Texaco Inc | Grease flow predictor |
| CN111426365A (en) * | 2020-03-31 | 2020-07-17 | 天津开发区瑞锋科技有限公司 | Crowd funding type intelligent water depth data acquisition system and method |
| CN117251943A (en) * | 2023-11-20 | 2023-12-19 | 力鸿检验集团有限公司 | Waterline position fluctuation curve simulation method and device and electronic equipment |
-
1928
- 1928-04-10 GB GB1052728A patent/GB309309A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2546641A (en) * | 1947-07-01 | 1951-03-27 | Francisco J Llanso | Draft calculator |
| US3409216A (en) * | 1967-04-18 | 1968-11-05 | Texaco Inc | Grease flow predictor |
| CN111426365A (en) * | 2020-03-31 | 2020-07-17 | 天津开发区瑞锋科技有限公司 | Crowd funding type intelligent water depth data acquisition system and method |
| CN111426365B (en) * | 2020-03-31 | 2021-10-08 | 天津开发区瑞锋科技有限公司 | Crowd funding type intelligent water depth data acquisition system and method |
| CN117251943A (en) * | 2023-11-20 | 2023-12-19 | 力鸿检验集团有限公司 | Waterline position fluctuation curve simulation method and device and electronic equipment |
| CN117251943B (en) * | 2023-11-20 | 2024-02-06 | 力鸿检验集团有限公司 | Waterline position fluctuation curve simulation method and device and electronic equipment |
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