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"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
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| Number | Title | Issue Date |
| 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 |
| 7002097 | Switching device for mode transition of DC plasma torches The present invention obtains an automatic mode switching of DC plasma torches through, which easily switches DC plasma torches to be run between a transmitting mode and a non-transmitting mode and put the switching device under the monitor and the control of a curr... | 02/21/2006 |
| 4538133 | Passively detonated explosively-assisted fuse An explosively-assisted fuse is passively triggered (without electronics) by means of an auxiliary fuse in series with the main conductor. The auxiliary fuse provides a detonating voltage across a gap formed therein on melting in response to a fault curre... | 08/27/1985 |
| 4479105 | Pyrotechnic current interrupter Apparatus is provided for automatically interrupting current in an electrical circuit before the first current peak which occurs after an excess current condition develops. The apparatus includes a main conductor in the current path which passes the curre... | 10/23/1984 |
| 4358648 | Power circuit breaker with opening and closing mechanisms A circuit breaker characterized by a pair of separable contacts, operating means for opening the contacts and comprising a cylinder and piston mechanism, closing means for closing the contacts and comprising a second cylinder and piston assembly operative... | 11/09/1982 |
| 4250365 | Current interrupter for fault current limiter and method A current interrupter is provided for use in controlling currents associated with power line faults. The interrupter is of the type having a housing filled with a dielectric fluid such as pressurized sulfur hexafluoride liquid and having electrodes extend... | 02/10/1981 |
| 4224491 | Chemically activated switch A switch is provided for use in controlling currents associated with power line faults. The switch includes a housing with a pair of relatively movable electrodes opened and closed by means of chemical propellants. In the preferred form, one electrode com... | 09/23/1980 |
| 4176385 | Explosively activated fault current limiter An explosively activated current interrupter is provided for use in a fault current limiting system employing a plurality of such interrupters. Each interrupter includes an automatic switching system for sequentially installing each of a plurality of the ... | 11/27/1979 |
