Cathode ray tube display device

Details Cathode ray tube display device Cathode ray tube display device

1981-12-29

1985-10-15

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

335213, H01J 2978

Patent

active

045477094

ABSTRACT:
A cathode ray tube display device having beam deflection coils (8,10,12,14) and means (44 and 46) for applying to inductive means (58 plus the coils) which includes the beam deflection coils a voltage for causing a ramp current to flow in the coils to produce progressive beam deflection, comprising means (52,54,56) for selectively modifying interconnections between the coils to change the inductance presented to the voltage applying means and thus change the gradient of the ramp current and the rate of beam deflection, said interconnection modifying means being operable to change the number of deflection coils through which said current flows.

REFERENCES:
patent: 2414939 (1947-01-01), Fitch
patent: 2544355 (1951-03-01), Richmond
patent: 2799798 (1957-07-01), Kratz et al.
patent: 2821657 (1958-01-01), Newhouse
patent: 3173053 (1965-03-01), Mead
patent: 3934173 (1976-01-01), Korver

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