Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For filament
Patent
1996-06-14
1997-09-09
O'Shea, Sandra L.
Electric lamp and discharge devices
With support and/or spacing structure for electrode and/or...
For filament
313618, H01J 188
Patent
active
056660189
ABSTRACT:
An electron tube cathode has a hollow cylindrical structure formed by thermo-emissive wires mounted between two conductive supports. The two supports are mechanically fixed to each other. To prevent the deformation of the cathode when the heating is turned on and turned off, at least one spring is used, this spring being integrated with one of the supports and being placed in the vicinity of the thermo-emissive wires. The spring is made of a material possessing elastic properties which, at ambient temperature, are lower than or equal to the properties that it has at a temperature greater than ambient temperature.
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patent: 3218502 (1965-11-01), Freggens
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patent: 3419743 (1968-12-01), Kaiser et al.
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patent: 4563609 (1986-01-01), Clerc et al.
Frossard Robert
Langlois Michel
Esserman Matthew J.
O'Shea Sandra L.
Thomson Tubes Electroniques
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