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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7049532 | Electric contacts, electric contact apparatus and method for detecting abrasion of the electric contacts A pair of electric contacts include a pair of first units which are provided on the surfaces of the end sides of the electric contacts, and generate light having first characteristics at the time of opening and closing of the electric contacts, and a pair of second ... | 05/23/2006 |
| 6855902 | Self bouncing arc switch The invention concerns a high coulomb transfer switch useful for high current pulse supplies, employing a self-bouncing arc mechanism, wherein two cylindrical electrodes are coaxially arranged and the pathway of current inside the switch is specially designed such t... | 02/15/2005 |
| 5057655 | Electrical circuit breaker with self-extinguishing expansion and insulating gas An inside of tubular contacts of a self-extinguishing expansion SF6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The pre... | 10/15/1991 |
| 4742423 | Gas insulated apparatus A gas insulated apparatus for high voltage, 3-phase applications in which an insulating, self-arc-extinguishing gas separates the high voltage lines from grounded vessels. According to the invention, the transverse impedance of the vessels is chosen so th... | 05/03/1988 |
| 4553008 | Load interrupter An load interrupter is disclosed having the characteristics of an ordinary puffer interrupter and a self-extinguishing gas flow interrupter. The load interrupter comprises a generally hollow cylinder which is adapted to be filled with an arc extinguishing... | 11/12/1985 |
| 4475018 | Puffer type gas circuit breaker The present invention relates to a puffer type gas circuit breaker wherein, in order to efficiently extinguish an electric arc struck when a movable arc contact is disengaged from a stationary arc contact, self-extinction by an arc extinguishing fluid in ... | 10/02/1984 |
| 4465910 | Self-generating gas flow interrupter An electrical circuit interrupter is disclosed having the characteristic of a puffer interrupter and a self-extinguishing gas flow interrupter. The interrupter comprises a generally hollow movable cylinder which is adapted to be filled with an arc extingu... | 08/14/1984 |
| 4459447 | Self extinguishing type gas circuit breaker A self extinguishing type gas circuit breaker includes a body member having a first end connected to a terminal plate and a second end with a nozzle formed of electrical insulation material and defining a nozzle opening in communication with the interior ... | 07/10/1984 |
| 4306130 | Arc self-extinguishing switch device A switch comprises an envelope including a pressure increasing compartment filled with an arc extinguishing fluid. A slit extends through one longitudinal side of the envelope to communicate with the compartment. A movable contact member having a flat cro... | 12/15/1981 |
| 4259555 | Self-extinguishing gas circuit interrupter A circuit interrupter comprising a first pressure chamber for quickly increasing the pressure of an arc extinguishing gas therein by utilizing the energy of an electric arc established between a pair of separable contacts, and a second pressure chamber di... | 03/31/1981 |
| 4253002 | Self-extinguishing type circuit interrupter A circuit interrupter comprising a first and a second chamber both containng an arc extinguishing gas such as SF6 gas, each chamber defining a space independent of the other when a pair of contacts is closed. Between the first and second chambe... | 02/24/1981 |
| 4221943 | Gas-blast type circuit interrupter An improved self-extinguishing puffer-type circuit interrupter comprising a casing filled with an arc extinguishing gas such as SF6 gas and including a pair of separable contacts, wherein the arc extinguishing fluid is pressure-raised by the en... | 09/09/1980 |
