1. A marine power generation apparatus for generating power from an ocean current, said apparatus comprising:
a turbine operable to generate power when within an ocean current, the turbine comprising one or more turbine blade assemblies comprising
a hub,
a set of turbine spokes, stays or blades extending radially from the hub, and
a circumferential ring extending around and connected to an outer periphery of the set of turbine spokes, stays or blades;
one or more magnetic means mounted thereto;
wherein the one or more turbine blade assemblies are mounted for rotation when placed in an ocean current such that rotation of the one or more turbine blade assemblies causes the one or more magnetic means to pass adjacent to power generation means adapted to generate power from the one or more magnetic means; and
anchoring means for anchoring the turbine relative to a floor of the ocean and in alignment with the ocean current, the anchoring means connected to and supporting the turbine and positioned below the turbine in use, and the anchoring means comprising a floodable vessel having variable buoyancy means operable for refloating the apparatus, and wherein the floodable vessel is formed to be positioned on the floor of the ocean during use.
2. A marine power generation apparatus according to claim 1, wherein the magnetic means comprise a plurality of magnets.
3. A marine power generation apparatus according to claim 2, wherein the magnets are permanent magnets, electrically-induced magnetic poles or a combination thereof.
4. A marine power generation apparatus according to claim 1, wherein the power generation means comprises one or more static windings.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An upright vacuum cleaner, comprising:
a main body for housing a suction power generating means for sucking air and a filtering means for filtering out foreign substances contained in the sucked air;
a suction nozzle pivotably connected to a lower portion of the main body for sucking the air containing the foreign substances and then guiding the sucked air into the main body;
a handle installed at the top of the main body and gripped by a user in use; and
a potential meter installed at one side surface of the handle and capable of controlling a suction power level and onoff operations of the vacuum cleaner by means of a sliding manipulation.
2. The upright vacuum cleaner as claimed in claim 1, wherein the potential meter is installed at a front surface of the handle.
3. The upright vacuum cleaner as claimed in claim 1 or 2, wherein the potential meter comprises a slide volume switch assembly which contains a plurality of contacts having different resistance therein and from which a slide element protrudes; a board which is installed at a front surface of the switch assembly and on which indications for suction power levels are printed; and a slide knob (56) installed at a front surface of the board, operated by the user, and interlocked with the slide element, and wherein the potential meter is installed in an opening (42) formed in the handle so that the board and slide knob are exposed to the outside at the front surface.