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- The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats through large height differences. Such locks, each of which would only raise and lower boats through small height differences of a few feet, would not suffice when large height differences had to be tackled nor when water was in short supply. The caisson (or caisoon) was thought to be one solution, although it transpired that the technology of the day was not capable of achieving this type of construction economically. It was designed primarily as a water-saving measure, and also was an attempt to minimise construction costs compared with other engineering solutions of the time. In use it was capable of replacing up to seven conventional locks. Other design benefits were speed of boat descent/ascent, and only a little loss of water when operating compared with a conventional boat lock. (en)
- L'ascenseur à caisson du canal à charbon du Somersetshire (en anglais : Somersetshire Coal Canal caisson lock) est un ascenseur à bateaux qui fut établi au XVIIIe siècle sur le canal à charbon du Somersetshire (aujourd'hui disparu), au sud de la ville de Bath en Angleterre. Il fut construit pour compenser la différence de niveau à Combe Hay, qui était de 41 mètres (135 pieds). Son concepteur fut l'ingénieur (1754-1810). On l'attribue parfois également à Erasmus Darwin. Cet ouvrage étonnant pour l’époque, digne des créations imaginaires de Jules Verne, est parfois qualifié sur place de « sous-marin pour bateaux ». Les détails de la machinerie et la localisation exacte de l’ouvrage restent à ce jour inconnus. La littérature française de l'époque (notamment Joseph-Michel Dutens) évoque l’ouvrage sous le nom d'"écluse à flotteur". (fr)
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- 10703 (xsd:nonNegativeInteger)
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- The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats through large height differences. Such locks, each of which would only raise and lower boats through small height differences of a few feet, would not suffice when large height differences had to be tackled nor when water was in short supply. The caisson (or caisoon) was thought to be one solution, although it transpired that the technology of the day was not capable of achieving this type of construction economically. (en)
- L'ascenseur à caisson du canal à charbon du Somersetshire (en anglais : Somersetshire Coal Canal caisson lock) est un ascenseur à bateaux qui fut établi au XVIIIe siècle sur le canal à charbon du Somersetshire (aujourd'hui disparu), au sud de la ville de Bath en Angleterre. Il fut construit pour compenser la différence de niveau à Combe Hay, qui était de 41 mètres (135 pieds). Son concepteur fut l'ingénieur (1754-1810). On l'attribue parfois également à Erasmus Darwin. Les détails de la machinerie et la localisation exacte de l’ouvrage restent à ce jour inconnus. (fr)
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- Caisson lock (en)
- Ascenseur à caisson du canal à charbon du Somersetshire (fr)
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