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 |
| 7285915 | Electron gun for producing incident and secondary electrons An electron gun. The electron gun includes an RE cavity having a first side with an emitting surface and a second side with a transmitting and emitting section. The gun also includes a mechanism for producing an oscillating force which encompasses the emitting surfa... | 10/23/2007 |
| 6914350 | Switching arrangement A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty module... | 07/05/2005 |
| 5780971 | Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coher... | 07/14/1998 |
| 5563555 | Broadbend pulsed microwave generator having a plurality of optically triggered cathodes Disclosed is a method and apparatus for generating a very fast electron pulse (30) in a vacuum. The electron source comprises a pulse-forming line (12), a solid-state switch (14), a cold field-emitting cathode (16), and an anode grid (18). The anode grid ... | 10/08/1996 |
| 5534824 | Pulsed-current electron beam method and apparatus for use in generating and amplifying electromagnetic energy Disclosed is a method and apparatus for generating a very fast electron pulse (30) in a vacuum. The electron source comprises a pulse-forming line (12), a solid-state switch (14), a cold field-emitting cathode (16), and an anode grid (18). The anode grid ... | 07/09/1996 |
| 5235248 | Method and split cavity oscillator/modulator to generate pulsed particle beams and electromagnetic fields A compact device called the split cavity modulator whose self-generated oscillating electromagnetic field converts a steady particle beam into a modulated particle beam. The particle beam experiences both signs of the oscillating electric field during the... | 08/10/1993 |
| 5150067 | Electromagnetic pulse generator using an electron beam produced with an electron multiplier A pulse generator for producing high-energy, subnanosecond electromagnetic pulses. The generator comprises a pulsed cathode assembly (160) which includes a microchannel-plate electron multiplier (150) triggered by a low-intensity, pulsed electron beam. An... | 09/22/1992 |
| 4847517 | Microwave tube modulator Provided is a modulator having two amplifying stages for supplying high-voltage pulses to the primary winding of a transformer connected to a microwave transmitter tube. The first stage uses field-effect transistors connected in a common source configurat... | 07/11/1989 |
| 4760311 | Sub-nanosecond rise time multi-megavolt pulse generator A sub-nanosecond rise time megavolt pulse generator is disclosed. The generator utilizes an induction energy store together with electron beams for generating a sub-nanosecond high voltage pulse wave-front. The electron beams are deflected to establish th... | 07/26/1988 |
| 4656430 | Short rise time intense electron beam generator A generator for producing an intense relativistic electron beam having a subnanosecond current rise time includes a conventional generator of intense relativistic electrons feeding into a short electrically conductive drift tube including a cavity contain... | 04/07/1987 |
| 4629937 | Compact electron gun for emitting high current short duration pulses Disclosed is a pulsed electron beam gun for generating a high current, short duration pulse which is received by a pulse detection circuit. The gun has a gated electron beam emitting area, a beam deflection and sweeping area and a beam pulse detector. Mag... | 12/16/1986 |
| 4489288 | High frequency pulse generating circuit A circuit for generating high frequency output pulses comprising a magnetron, a pulse transformer having its secondary winding coupled to apply firing pulses across the input terminals of the magnetron, charge storage means connected in circuit with the p... | 12/18/1984 |
| 4153881 | Early flood warning system An Early Flood Warning System provides advanced warning of probable flash floods and/or stage floods to potential flood victims by collecting and analyzing rainfall and stream level data, and by providing means for disseminating alarms and instructions to... | 05/08/1979 |
| 4001772 | Coded signaling and control system A coded signaling and control system including one or more transmitters and one or more receivers, wherein both the transmitters and the receivers are coded or programmed to transmit a unique signal for actuating only selected ones of the receivers. Digit... | 01/04/1977 |
| 3937997 | Cathode-ray tube signal generator having resistance configurated electron receptor The present invention relates to apparatus for generating electric signals. Basically, the disclosed apparatus comprises a cathode-ray-type tube wherein the electron-beam sweeps across an especially designed electron-receptor. By suitable design of the re... | 02/10/1976 |
