Illumination – Elongated source light unit or support – With means to accommodate additional circuit element
Patent
1995-03-31
1996-06-25
Gromada, Denise L.
Illumination
Elongated source light unit or support
With means to accommodate additional circuit element
F21V 2302
Patent
active
055306349
ABSTRACT:
To suppress electromagnetic interference across a wide range of frequencies, in both magnetic and electrical fields, an emissive wire is surrounded by a ferrite core having an outer surface covered with a metal foil. The metal foil on the core or cores is grounded. If multiple cores are used in proximity, the foils of the several cores are electrically coupled together. In one embodiment, an omni-directional strobe light like the one shown in U.S. Pat. No. 5,155,666 is shielded by placing pairs of foil-covered ferrite cores around the wires at each apex of the polygon formed by the interconnected flash tubes, grounding the cores to the nearest lamp reflector, and grounding the reflectors together.
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Materials regarding EG&G Electro-Optics EMI Suppressor Unit for Flashheads, 8 pages (1993).
Basichas Alfred
Gromada Denise L.
Hoffman Louis J.
Hughey & Phillips, Inc.
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