Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 5592055 | Radio-frequency plasma source A plasma source is described, comprising a discharge chamber (1) bounded by a base wall (5) and by a lateral wall (3), a system (7) for the admission of gas into said discharge chamber, a system of electrodes (13, 15) which are associated with said discha... | 01/07/1997 |
| 5434469 | Ion generator with ionization chamber constructed from or coated with material with a high coefficient of secondary emission In a device for ion generation, the ionization chamber is characterized by walls coated with a material with a high coefficient of secondary emission, such as a suitable glass; this enables the energy yield and mass yield of the device to be improved with... | 07/18/1995 |
| 5431045 | Device and method for measuring on earth the thrust of thrusters for use in space The equipment for measuring on earth the thrust of thrusters for use in space comprises a balance (1) and a measuring means (11) which is associated with the balance in order to measure the thrust exerted by the thruster (P). The balance (1) is provided w... | 07/11/1995 |
| 5352954 | Plasma generator and associated ionization method In the discharge chamber (21) of a device for generating plasma, used in the space sector for ion propulsion or for the discharging of satellites and in applications on the ground, suitable ionizing radiation sources (47) are provided, capable of improvin... | 10/04/1994 |
| 5321336 | Electron gun device for controlling the potential of a body in space The cathode of an electron gun is connected to the body of a space vehicle, performing an automatic limitation (or neutralization) of the negative potential (measured with respect to the physical entity toward which the electron beam is directed, i.e. the... | 06/14/1994 |
| 5272412 | Method for the production of extraction grids for ion generation and grids produced according to said method An innovative method is proposed for the production of ion extraction grids, comprising the stages of: disposing a plurality of wires or metallic filaments in a lattice structure; coating said structure with a layer of boron. The coating with boron may take pl... | 12/21/1993 |
| 5241243 | Device with unheated hollow cathode for the dynamic generation of plasma A hollow cylinder (3) of suitable material (the cathode) and one or more anodes (5, 7) of suitable shape and dimensions permits the generation of high-density plasma capable of being used particularly (but not exclusively) for applications in space. The p... | 08/31/1993 |
| 5241244 | Cyclotron resonance ion engine An ion engine for the generation of primary plasma by discharge in a gas wherein the discharge is obtained by the simultaneous use of a magnetic conditioning and confinement field and an electromagnetic field. The latter being at a frequency such that the... | 08/31/1993 |
| 5175468 | Device for generating an on-off modulation electron beam An electron gun and a high tension switch permits the achievement of high-power electron beams which are ON-OFF modulated by DC up to frequencies exceeding kHz. The electron gun has a cathode, at least two accelerating electrodes, a cathode heater, and a ... | 12/29/1992 |
