Title: Camera tube and method of manufacturing same

Abstract: An electron gun for a camera tube includes an anode and a cathode. The cathode is assembled in a cathode support which can very readily be adjusted relative to the anode in the non-connected condition. In particular, the cathode support and the anode are movable radially with respect to each other and with respect to an axis. An emissive cathode surface and a part of the anode extending perpendicular to the axis remain accurately parallel to each other during the radial movement. As a result of this it is possible to cause the central path of the generated electron beam and the gun axis to coincide so that extra correction coils for aligning the electron beam may be omitted.

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Inventors: Van, Roosmalen Johannes H. T. (Eindhoven, NL)
De, Haas Franciscus C. M. (Eindhoven, NL)

Application Number: 06/260665
Filing Date: 1981-05-04
Publication_date: 1984-02-21
Assignee: PHILIPS CORP (US)

Primary Class(es): 445/34 445/4, 445/36
Other Classes: H01J29/48; H01J29/82; H01J31/38; H01J31/08; H01J9/18
US Patent Ref:

2146365	February, 1939	Batchelor	313/447	Electron emitter
2411184	November, 1946	Beggs	29/251.6	Fabrication of discharge devices
2945295	July, 1960	Feaster	29/251.4	High temperature metallic joint
3128407	April, 1964	Mattson	313/451	Cathode-grid assembly for electron guns
3500520	March, 1970	Oess	29/251.6	METHOD OF OBTAINING APERTURE ALIGNMENT IN AN ELECTRON GUN CONSTRUCTION
3885191	May, 1975	Kerstetter	313/451	Cathode-grid assembly for a cathode ray tube
3928784	December, 1975	Weijland	313/389	Television camera tube with control diaphragm
3984261	July, 1975	Corson	313/449	Ohmic contact
4112327	September, 1978	Eisele	313/446	Cathode structure and method

Other Refs: FR50983

July, 1938

313/446

Other References: Funk Technik, No. 1-1978, pp. 1-6.

Primary Examiner: Ramsey, Kenneth J.
Assistant Examiner:
Attorney: Schechter, Marc D.

Parent Case Data:

This is a division of application Ser. No. 056,481, filed July 11, 1979, now U.S. Pat. No. 4,309,638.