Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1987-06-12
1988-07-26
Hix, L. T.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
315 8, H01F 1300, H01H 4700
Patent
active
047604891
ABSTRACT:
A degaussing apparatus for a video display includes a degaussing coil and a source of degaussing current. A switching means is coupled to the degaussing coil and to the source for providing a path for degaussing current between the source and coil during a degaussing operation. First and second PTC elements, functioning as degaussing current reducing means, are coupled to the degaussing coil and to the switching means. The switching means produces alternate coupling of the first and second PTC elements to the degaussing coil with respect to successive degaussing operations.
REFERENCES:
patent: 3495136 (1970-02-01), Gerritsen
patent: 3845442 (1974-10-01), Ihaya
Hix L. T,.
Laks Joseph J.
Porterfield David
Rasmussen Paul J.
RCA Licensing Corporation
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