Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6952466 | Oil-free electron source for an EBT scanner An oil-free electron source including a vacuum chamber within which a vacuum is maintained. A rigid insulated receptacle and an anode extend into the vacuum chamber and are mounted to opposite ends of the housing. A cathode-focus electrode assembly is mounted to an ... | 10/04/2005 |
| 6917148 | Oxide cathode for an electron gun, having a denser and thinner emissive zone Cathode comprising a substrate (2) supporting a cathode emissive coating, comprising what is called an emissive central zone (12) and what is called a nonemissive peripheral zone (11); according to the invention: | 07/12/2005 |
| 5955829 | Cathode for electron gun with band-shaped beams Electron gun with band-shaped beams that includes a vacuum chamber extend in a longitudinal direction, a beam window running in the longitudinal direction along the vacuum chamber, and a cathode control-electrode system positioned within the vacuum chamb... | 09/21/1999 |
| 5814939 | Mechanically tunable magnetron injection gun (MIG) A mechanically tunable magnetron injection gun (MIG) provides an annular, relativistic beam of electrons for injection into an axially aligned magnetic field of a gyrotron-class device. The electron emitter encircles a center electrode. Turning a knob adj... | 09/29/1998 |
| 5686785 | Electron gun having electrically isolated and adjustable cathode An electron gun for producing a beam of electrons has an elongated, linear thermionic cathode and a focusing electrode. The opposite ends of the cathode are engaged by adjustable holders which enable the spatial separation between the cathode and focusing... | 11/11/1997 |
| 4798993 | Electron gun for electronic tubes In electron guns for electronic tubes, such as travelling wave tubes, for power modulating the electron beam, the distance between the cathode and the modulation grid increases the closer to the axis of the tube. Such a gun can be applied to travelling wa... | 01/17/1989 |
| 4634925 | Electron gun for a high power klystron An electron gun for a high power klystron which includes a cathode which emits electrons; a focus electrode which, connected to the cathode through a supporting member composed of a material of high electric resistivity, makes the electrons emitted from t... | 01/06/1987 |
| 4593230 | Dual-mode electron gun An improved dual-mode electron gun includes a close-in and a further control grid to control the laminar flow of electrons which pass from the smooth spherical surface of a cathode toward an annular anode. In the high mode of operation, the close-in grid ... | 06/03/1986 |
| 4583021 | Electron gun with improved cathode and shadow grid configuration An improved electron gun is shown with a cathode having a smooth, concaved surface and a grooved pattern therein which matches, and is aligned with, the pattern of a shadow grid placed immediately before the cathode surface so that the outer, larger radiu... | 04/15/1986 |
| 4543509 | Off-axis electron gun The purpose of the off-axis electron gun is to generate a beam of electrons and to deflect the beam onto the axis of a device which utilizes the beam. The off-axis electron gun includes an arcuate wire electron emitting source subtending an azimuthal angl... | 09/24/1985 |
| 4495442 | Cold-cathode magnetron injection gun A magnetron injection gun comprising a conical cold-cathode and a cylindrical anode coaxially surrounding the cold-cathode. The anode is provided with an annular projection extending toward the emission ring surface, and the surface of the conical cold-ca... | 01/22/1985 |
| 4321505 | Zero-bias gridded gun A gun for a linear-beam electron tube has a control grid for modulating the beam current which consists of an array of conductive web elements whose spacing from each other is much larger than their spacing from the concave emissive surface of the cathode... | 03/23/1982 |
| 4227116 | Zero-bias gridded gun A gun for a linear-beam electron tube has a control grid for modulating the beam current which consists of an array of conductive web elements whose spacing from each other is much larger than their spacing from the concave emissive surface of the cathode... | 10/07/1980 |
| 4205254 | Electron gun for a cathode ray tube In an electron gun of a cathode ray tube of the type comprising a cathode electrode for emitting an electron beam, a first grid electrode for focusing the electron beam and a second grid electrode for accelerating the electron beam, the cathode surface wh... | 05/27/1980 |
| 4147953 | Cathode construction for linear beam tubes A linear beam tube is provided with a gridded electron gun in which a concave cathode surface is provided with concave channels from which electrons are emitted. The channels may be arranged as concentric annuli. In a preferred embodiment the channels ext... | 04/03/1979 |
