Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1977-03-31
1979-01-30
Segal, Robert
Electric lamp and discharge devices
Cathode ray tube
Envelope
313458, 313412, 316 18, H01J 2994, H01J 9385
Patent
active
041374800
ABSTRACT:
This disclosure depicts a novel electron gun having at least one cathode having an electron emissive coating, a forward element and a plurality of electrodes interspaced between the cathode and the forward element. The electrodes and forward element each have at least one aperture wherein the apertures in the electrodes and forward element are coaxial and define at least one beam passageway for passing through the gun a stream of electrons emitted by the cathode during operation. The beam passageway unavoidably forms a conduit for high velocity gas when the gun is located in a narrow neck of a television picture tube and the tube is evacuated of gas through a tubulator located at the rear end of the neck. The improvements in the electron gun comprise a gas influencing element for reducing and perturbing the high velocity gas flow in the conduit at least in the region of the cathode as the tube is evacuated to suppress erosion of the cathode coating by preventing a violent flow of gas over the cathode.
REFERENCES:
patent: 2617061 (1952-11-01), De Gier
patent: 3604969 (1971-09-01), Blumenberg
patent: 3614502 (1971-10-01), Doggett et al.
Amin Ramesh G.
Gioia Norman F.
Retsky Michael W.
Torre Alton J.
Clarke, Jr. Ralph E.
Segal Robert
Zenith Radio Corporation
LandOfFree
Television picture tube with cathode coating erosion suppression does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Television picture tube with cathode coating erosion suppression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Television picture tube with cathode coating erosion suppression will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1152493