Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7188466 | Passive, high-temperature amplifier for amplifying spark signals detected in igniter in gas turbine engine A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the ign... | 03/13/2007 |
| 7093422 | Detecting spark in igniter of gas turbine engine by detecting signals in grounded RF shielding A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the ign... | 08/22/2006 |
| 7015698 | Sensor for detection of spark in igniter in gas turbine engine An igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is used to detect current which produces the spark, the thereby infer the presence of spark. Further, t... | 03/21/2006 |
| 6935120 | Approach to extending life of gas turbine engine Methods of increasing lifetimes of components in a gas turbine engine. Ordinarily, components are replaced after they experience a certain number of thermal cycles, or a certain operating temperature limit is exceeded. Under one form of the invention, the components... | 08/30/2005 |
| 6760796 | Smart card which temporarily stores transactions in non-secure memory and consolidates the transactions into secure memory The present invention relates to a smart card and to a method of operating the smart card in which the smart card has input/output means enabling the smart card to receive and transmit data regarding individual financial transactions. The smart card has a microproce... | 07/06/2004 |
