Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1979-02-14
1981-01-13
Braun, Fred L.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335210, H01F 100
Patent
active
042452058
ABSTRACT:
A convergence correction arrangement for a television display system using a deflection yoke mounted coaxially upon the neck of a kinescope includes first and second magnetically permeable tabs contiguous with the beam entrance end of the yoke. The tabs are located on opposite sides of the axis and a fixed separation is maintained between them. A first track constrains the tabs against tangential motion relative to the axis while permitting radial motion. A rotary drive arrangement suited to being engaged by a yoke adjustment machine includes a second track having radial and tangentially-directed components. The second track engages the tabs whereby roatary motion of the rotary drive arrangement drives the convergence-adjusting tabs radially and provides differential motion of the tabs relative to the axis for convergence control.
REFERENCES:
patent: 3290532 (1966-12-01), Lemke et al.
patent: 3290533 (1966-12-01), Ammerman
patent: 3305744 (1967-02-01), Werst
patent: 3332046 (1967-07-01), Melone
patent: 3605053 (1971-09-01), Anthony
patent: 3743985 (1973-07-01), Nishimura et al.
patent: 3942146 (1976-03-01), LaBelle
Braun Fred L.
Rasmussen Paul J.
RCA Corporation
Stevens Scott J.
Whitacre Eugene M.
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