Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7323652 | Gas insulated switchgear The gas insulated switchgear includes a rotary shaft which penetrates a pressure vessel is connected with a moving part which is housed in the pressure vessel by way of a lever, and is connected to the moving part, and brackets which support the rotary shaft and are... | 01/29/2008 |
| 7283136 | Cell descriptor A method, system and apparatus for use in computer-aided design, computer-aided manufacturing, computer-aided engineering and product lifecycle management. Cell descriptors are used to identify one or more geometric cells of a model. The cell descriptors are in the ... | 10/16/2007 |
| 6624372 | Gas insulated switchgear A gas insulation switchgear having a lowered overall height is provided. The height of the gas insulation switchgear can be lowered by constructing the gas insulation switchgear so as to comprise a breaker unit 13 horizontally arranged in the lower side a... | 09/23/2003 |
| 5589674 | Metal-encapsulated, gas-insulated switching installation A metal-encapsulated, gas-insulated switching installation is provided with at least one busbar system, the busbar system having an axis separation, and a circuit breaker, the circuit breaker being in the form of a pole and having a pole axis, the circuit... | 12/31/1996 |
| 5291369 | Three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgear A three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgear may include a single-pole, encapsulated, high-voltage power switch. Breaker units are located in a pressure chamber and are arranged with longitudinal axes thereof parallel to... | 03/01/1994 |
| 5166483 | Electrical circuit breaker with rotating arc and self-extinguishing expansion A three-phase circuit breaker with self-extinguishing expansion and rotating arc structures comprises an arc extinguishing chamber per pole and housing a pair of contacts, one stationary and one moveable, a coil to rotate the arc, and an exhaust channel i... | 11/24/1992 |
| 5012051 | Three-phase common container-type circuit breaker Breaker units (3, 4) of three-phases are enclosed in a common container (25). The three-phase breaker units and lead conductors (27a, 28a) connected to both ends of the breaker units are arranged on imaginary straight lines that are in parallel each other... | 04/30/1991 |
| 4821140 | Gas insulated switchgear disconnector arrangement A gas insulated switchgear comprises main circuit disconnector units for three phases contained within a single vessel and a shunt circuit disconnector unit also contained within the vessel and provided in the vicinity of a side portion of the main circui... | 04/11/1989 |
| 4816624 | Multiphase gas expansion circuit breaker for gas-insulated metalclad cell A circuit breaker includes a plurality of poles disposed parallel side by side in a sealed enclosure (18) filled with SF6 insulating gas. The housing of each arc extinguishing chamber (22) comprises a metal shielding wall (52) designed to neutralize the i... | 03/28/1989 |
| 4779197 | Three-phase-enclosure type gas insulated switchgear A three-phase-enclosure type gas insulated switchgear in which high-voltage conductors in a metallic vessel are disposed in parallel to each other to pass through apexes of a substantially right angled equilateral triangle, and in which each of the high-v... | 10/18/1988 |
| 4774627 | Metal-encapsulated switching apparatus A metal-encapsulated switching apparatus includes a housing having first and second opposite ends, a first insulator disposed at the first end and a second insulator disposed at the second end. First terminals are supported on the first insulator. First p... | 09/27/1988 |
| 4701583 | Gas switch Herein disclosed is a gas switch comprising: a body casing having an arc-extingushing gas such as the SF6 gas and the like confined therein; bushings having their inner end portions inserted into said body casing; a rod-shaped stationary electrode and a h... | 10/20/1987 |
| 4570042 | Gas-insulated switching apparatus A gas-insulated switching apparatus comprises gas-insulated interrupters, gas-insulated buses and gas-insulated disconnecting switches, whereby the movable electrode side terminals of all the disconnecting switches accommodated in the apparatus are so arr... | 02/11/1986 |
| 4442329 | Dead tank housing for high voltage circuit breaker employing puffer interrupters A cylindrical housing for a high voltage circuit breaker is filled with sulfur hexafluoride and receives three parallel elongated puffer interrupters arranged with their axes on the apices of an equilateral triangle. A single triangular support plate rece... | 04/10/1984 |
| 4417111 | Three-phase combined type circuit breaker A three-phase combined type circuit breaker is disclosed which comprises a common housing, three-phase interrupting units in said common housing, movable contacts of the interrupting units connected through link mechanisms to operating devices for three p... | 11/22/1983 |
| 4013853 | Multi-phase compressed-gas circuit-breaker construction An improved multi-phase compressed-gas circuit-breaker installation is provided having the three or more circuit-breaker assemblies mounted upon a horizontally-extending rigid frame structure, with the high-pressure and low-pressure gas-reservoir tanks di... | 03/22/1977 |
| 4004118 | Metal clad monophase switchgear panels for high voltages and polyphase switching plants consisting of such switchgear panels Metal clad switchgear for high voltages comprising monophase switchgear units, in each of which the circuit-breaker is accommodated in a spherical casing and each isolator connected to the circuit-breaker is provided in a substantially tubular casing whic... | 01/18/1977 |
| 3947650 | Gas-insulated switch for an underground power distrubution system An electric switch suitable for use in underground distribution (UD) systems includes a conductive housing having at least one pair of insulated feed-through bushings mounted thereon. The bushings are adapted to receive underground conductor terminations ... | 03/30/1976 |
