Electric lamp and discharge devices – Cathode ray tube – Ray generating or control
313479, 313452, H01J 2946
A focussing lens for an electron beam device is formed by a helically coiled resistance layer of a fired suspension of a conductive material of a mixture of a lead rathenate, a lead titanate and a ruthenium oxide in a glass formed of silicon dioxide, aluminum oxide and lead oxide.
patent: 4713879 (1987-12-01), Vrijssen
patent: 4827184 (1989-05-01), Spanjer et al.
patent: 4853589 (1989-08-01), Vrijssen
patent: 4857797 (1989-08-01), Vrijssen et al.
Montie Edwin A.
Osborne William N.
Prinsen Petrus J. M.
Patel Nimesh D.
Philips Electronics North American Corporation
Spain Norman N.
Yusko Donald J.
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