Thermionic cathode heater
US4634921A · kind A · utility
4Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jul 3, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/15
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heater for a thermionic cathode for producing an electron beam includes a central wide and a hollow cylindrical conductor with the wire disposed coaxially thereof. The wire and the cylindrical conductor are electrically connected at one end of the heater and at the other end include means for connecting to a power source. Equal electrical currents thus flow in opposite directions in the wire and the cylindrical conductor so that the magnetic fields produced thereby tending to deflect the electron beam cancel each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.