Focus volume coupling device of FBT

Details Focus volume coupling device of FBT Focus volume coupling device of FBT

1999-03-25

2000-10-31

Gellner, Michael L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338226, H01C 1032

Patent

active

061409081

ABSTRACT:
A focus volume of an FBT (fly back transformer) focus unit and its coupling device are disclosed, in which a volume board is provided in a small size, but the voltage breakdown resisting strength is reinforced. At least one or more round resistor patterns 130 are formed on a volume board 120 which is installed within a focus volume 100 of the FBT focus unit 110. An opening 140 is formed within each of round portions of the resistor patterns 130, and a volume case 180 has a pair of isolating walls 160 within its interior 170, for being inserted into the opening 140 of the volume board 120. The volume case 180 is installed on a side of an FBT case 150. Thus the volume board is made to have a small size, but its voltage breakdown resisting strength is reinforced. Therefore, the filling of an epoxy resin is not required, thereby simplifying the manufacturing process, and making it easy to manufacture the product.

REFERENCES:
patent: 2367170 (1945-01-01), Fahrenwald
patent: 3543213 (1970-11-01), Weyenberg
patent: 3860789 (1975-01-01), Maake
patent: 4829282 (1989-05-01), Waugh et al.
patent: 5789703 (1999-08-01), Choi
patent: 5859407 (1999-01-01), Saiki et al.

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