Voltage dividing shielded door seal

Details Voltage dividing shielded door seal Voltage dividing shielded door seal

H - Electricity

05

K

347/7

H05K 9/00 (2006.01)

Patent

CA 1254988

ABSTRACT Disclosed is an electromagnetic shielded door seal which will block both low frequency electromagnetic waves as well as very high frequency electromagnetic waves. The sealing effectiveness of the door seal which may be used for a shielded enclosure, is improved by introducing a high frequency impedance between the two coacting surfaces of the door seal. The door seal is provided with two cooperating members which move relative to one another. At least one of the members contains a small cavity therein which is filled with a dielectric or lossy material. The periphery surrounding the cavity is closed, with the exception of a small gap ensuring communication between the material provided within the cavity and a sealing surface between the two cooperating members. The combination of this gap and the dielectric material introduces a high frequency impedance between the surfaces of the seal. This impedance results in a voltage dividing action and reduces the voltage across the protected surface of the door seal.

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