GB471562A - - Google Patents
Info
- Publication number
- GB471562A GB471562A GB471562DA GB471562A GB 471562 A GB471562 A GB 471562A GB 471562D A GB471562D A GB 471562DA GB 471562 A GB471562 A GB 471562A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rope
- pawl
- pulley
- vessel
- gate
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H11/00—Defence installations; Defence devices
- F41H11/05—Net barriers for harbour defence
Abstract
471,562. Net barriers for the defence of harbours. JENKINSON. E. G. May 9, 1936, No. 13136. [Class 9 (ii)] [Also in Group XXX] A pulley-block is provided with a pawl 3 which engages a link of a short length of chain 8 inserted in the hoisting rope 7 to retain the load in a desired position. The pawl is pivoted at 4, and its shorter arm is connected to a pair of springs 5 under tension. The pawl is moved by the springs into position to permit lowering of the load when the entire chain has been pulled past it in the hoisting dircetion. The groove in the pulley has a deep central portion 9 in which the rope lies clear of the pawl. When the apparatus is used in connection with harbour defences of the kind in which nets are stretched between fixed anchoring points, and one section of net which is to act as a gate is anchored at one end to a buoy and at the other end to a vessel, the rope connecting the gate to the vessel is passed round a pulley-block constructed as described above and located on a buoy remote from the vessel. When this rope is hauled in, the gate is opened and is locked in open position by the engagement of the pawl and chain. In this position the rope can be slackened to permit the passage of vessels over it. The rope is released in the manner already described, and the net restored to position in the barrier by hauling on a second rope.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB471562A true GB471562A (en) | 1900-01-01 |
Family
ID=1747007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB471562D Expired GB471562A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB471562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0438258A2 (en) * | 1990-01-15 | 1991-07-24 | Petroleo Brasileiro S.A. - Petrobras | Method for the casting of anchors and mooring of platforms, and an anchor casting unit |
-
0
- GB GB471562D patent/GB471562A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0438258A2 (en) * | 1990-01-15 | 1991-07-24 | Petroleo Brasileiro S.A. - Petrobras | Method for the casting of anchors and mooring of platforms, and an anchor casting unit |
| EP0438258A3 (en) * | 1990-01-15 | 1991-11-27 | Petroleo Brasileiro S.A. Petrobras | Method for the casting of anchors and mooring of platforms, and an anchor casting unit |
| EP0612655A2 (en) * | 1990-01-15 | 1994-08-31 | Petroleo Brasileiro S.A. - Petrobras | Method for the casting of anchors and mooring of platforms, and an anchor casting unit |
| EP0612655A3 (en) * | 1990-01-15 | 1994-11-09 | Petroleo Brasileiro Sa | Method for the casting of anchors and mooring of platforms, and an anchor casting unit. |
| EP0653349A1 (en) * | 1990-01-15 | 1995-05-17 | Petroleo Brasileiro S.A. - Petrobras | Line fisher for use in anchor laying |
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