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| Number | Title | Issue Date |
| 7315228 | Electro-magnetically enhanced current interrupter The present invention provides an apparatus and method of interrupting the current in a circuit wherein the magnetic pressure induced by current flow through a conductor causes the conductor to flow and thereby open the associated circuit. Magnetic pressure may be d... | 01/01/2008 |
| 7289309 | Isolation apparatus The apparatus is intended for disconnection of a live electrical conductor and has an enclosure (3) and two power connections (1, 2) which are passed out of the enclosure (3). A conductor section (7) which connects the two power connectio... | 10/30/2007 |
| 7012354 | Method and structure for a pusher-mode piezoelectrically actuated liquid metal switch A method and structure for an electrical switch. According to the structure of the present invention, a liquid-filled chamber is housed within a solid material. A plurality of switch contacts within the liquid-filled chamber are coupled to the solid material, while ... | 03/14/2006 |
| 6946776 | Method and apparatus for maintaining a liquid metal switch in a ready-to-switch condition A method and apparatus for maintaining a liquid metal switch in a state of readiness for switching. The liquid metal switch has a liquid metal volume contained in a cavity of a switch body. A signal path though the cavity is made or broken by energizing an actuator ... | 09/20/2005 |
| 6900578 | High frequency latching relay with bending switch bar An electrical relay that uses a conducting liquid in the switching mechanism. In the relay, a pair of moveable switching contacts is attached to the free end of a switch bar and positioned between a pair of fixed electrical contact pads. The connections to the switc... | 05/31/2005 |
| 6894424 | High frequency push-mode latching relay An electrical relay that uses a conducting liquid in the switching mechanism. In the relay, a pair of moveable switching contacts is positioned between a pair of fixed electrical contact pads. A surface of each contact supports a droplet of a conducting liquid, such... | 05/17/2005 |
| 6876133 | Latching relay with switch bar An electrical relay that uses a conducting liquid in the switching mechanism. In the relay, a pair of switching contacts is attached to the free end of a switch bar and positioned between a pair of fixed electrical contact pads. A surface of each contact supports a ... | 04/05/2005 |
| 6621401 | Self-recovering current limiting device having liquid metal A self-recovering current-limiting device with a liquid metal includes two T-shaped electrodes for connection to an electric circuit to be protected. Each of the electrodes are made of a solid metal. Several compressor cavities which are partially filled ... | 09/16/2003 |
| 6603384 | Self-recovering current-limiting device having liquid metal A self-recovering current-limiting device having liquid metal includes solid metal electrodes for connecting to an external electric circuit to be protected. A plurality of compression spaces which are partially filled with liquid metal are arranged one b... | 08/05/2003 |
| 6600405 | Self-regenerating current limter with liquid metal A self-regenerating current limiter with liquid metal includes solid metal electrodes for connection of the current limiter to an electric circuit to be protected. A plurality of compression chambers that are partially filled with liquid metal are located... | 07/29/2003 |
| 5581192 | Conductive liquid compositions and electrical circuit protection devices comprising conductive liquid compositions Novel conductive liquid compositions which have low resistivity when carrying an applied steady-state current (ISteady-State) but exhibit sharp increases in resistivity when subject to an applied fault current (IFault). When used in ... | 12/03/1996 |
| 5471185 | Electrical circuit protection devices comprising conductive liquid compositions The invention provides an electrical circuit protection device using a conductive liquid contained in a flexible tube contacted and sealed at each end by an annular metal electrode capped by a flexible membrane. The flexible tube is further sealed inside ... | 11/28/1995 |
| 5038894 | Drive control apparatus A drive control apparatus includes a magnetic field in which a magnetic field gradient is provided by applying a magnetic field to the magnetic fluid to produce an apparent specific gravity gradient in accordance with the magnetic field gradient. A contro... | 08/13/1991 |
| 4841834 | Command operated liquid metal opening switch A very low inductance, very low resistance, command operated repetitive high current opening switch is described which uses a Lorentz force to move a conductive liquid between a conducting region and an insulated region between two electrodes. In a specif... | 06/27/1989 |
| 4804932 | Mercury wetted contact switch A glass reed relay has an elongated glass enclosure with an electrode passing through and being sealed to each of the opposite ends of said enclosure. One of the electrodes has an associated reed for making and breaking contact with the other of said elec... | 02/14/1989 |
| 4663503 | MHD pinch interrupting switch for high currents Switching apparatus for very high currents utilizes the magneto hydrodyna pinch effect to interrupt a liquid metal column that occupies the gap between a pair of spaced conductors maintained apart by an insulating sleeve. The on/off condition of the swit... | 05/05/1987 |
| 4292615 | Switching element A switching element having a container made of insulating material, terminals extending from the inside to outside of the container, a mixture filled and hermetically sealed in the container, the mixture being composed of conductive powder or particles wh... | 09/29/1981 |
| 4188601 | Mercury-wetted relay construction A mercury-wetted relay construction is disclosed in which a substantially flattened "Z" shaped armature (20) is mounted by means of a flexible hinge (19), at one side of the stem (11) to extend in an overlapping and spaced-apart relation with a contact (1... | 02/12/1980 |
| 4156216 | Mercury switch relay A mercury switch is provided in a cartridge for insertion into a relay having a plurality of flux fingers spaced apart to define a flux finger gap, the cartridge being received in the relay and bridging the flux finger gap. The mercury switch includes a p... | 05/22/1979 |
| 4134088 | Miniature magnetic mercury-wetted relay construction A miniature magnetic, mercury-wetted relay construction for achieving optimum magnetic reluctance in its operating flux path and thereby improving relay sensitivity. The dimensions of the armature of the relay are determined for maximum flux-carrying capa... | 01/09/1979 |
| 4123675 | Inertia damper using ferrofluid A viscous-fluid inertia damper, which damper comprises a housing composed of a nonferromagnetic material and having a chamber therein, a seismic mass containing a permanent magnet disposed in the housing chamber and in a closely spaced-apart relationship ... | 10/31/1978 |
