Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1987-11-25
1989-04-11
Moore, David K.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 535, 313156, H01J 2986, H01J 526
Patent
active
048209554
ABSTRACT:
A traveling wave tube has a cylindrical vacuum envelope surrounding a delay line. The vacuum envelope is tightly surrounded by a permanent magnet system of ring-shaped pole discs and of magnetic rings respectively arranged between the pole discs and oppositely polarized in alternating fashion in an axial direction. The permanent magnet system is inserted into an outer envelope in form-fit fashion. An attitude and position retention for the focusing elements which is resistant to temperature shock is provided in the traveling wave tube. For this purpose the permanent magnet system is glued at its outside generated surface and the glue is formed of a mixture of an epoxy resin having adhesive properties and of glass fibers provided therein in an undirected attitude. This traveling wave tube is useful given extreme temperature fluctuations, such as in a range from -60.degree. C. through +95.degree. C.
REFERENCES:
patent: 3227913 (1966-01-01), Disman et al.
patent: 4104559 (1978-08-01), Hobbs
patent: 4283656 (1981-08-01), Goto et al.
patent: 4539512 (1985-09-01), Heynisch et al.
patent: 4712293 (1987-12-01), Manoly
2213 Frequenz, vol. 35 (1981) Jun., No. 6, Berlin, Germany, "Application of Carbon Fibre Epoxy Technology to RF-Components of Satellite Payloads", pp. 155-162.
Boehme Gerit
Turnwald Hermann
Moore David K.
Powell Mark R.
Siemens Aktiengesellschaft
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