US PATENT SUBCLASS 439 / 607
HAVING OR PROVIDING INDUCTIVE OR CAPACITIVE SHIELD

Current as of: June, 1999
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439 /   HD   ELECTRICAL CONNECTORS

607HAVING OR PROVIDING INDUCTIVE OR CAPACITIVE SHIELD {3}
608  DF  .~> Conductive shielding material individually surrounding or interposed between mutually insulated contacts
609  DF  .~> Resilient conductive means providing additional electrical path between mating outer shield members
610  DF  .~> Having means for electrically connecting shield of shielded cable to connector shield member

DEFINITION

Classification: 439/607

HAVING OR PROVIDING INDUCTIVE OR CAPACITIVE SHIELD:

(under the class definition) Electrical connector comprising a conductive screen means for (a) preventing or reducing the detrimental effect induced within a connector or contact* due to capacitive or inductive coupling with electric or magnetic fields generated from a source outside of the connector or contact, or (b) preventing or reducing induced electrical interference or signal loss due to capacitive or inductive coupling between mutually insulated contacts within a plural-contact connector (i.e., reducing crosstalk), or (c) preventing or reducing undesirable loss of electrical information or signal due to electrical radiation of signal from the connector or contact.

(1) Note. Since there are included herein connectors of the type adapted to be electrically connected to a cable* having an outer conductive shield concentrically surrounding the longitudinal axis of the cable, there is a similarity between the connectors for coaxial cables found in subclasses 578+ and some of the connectors included in this and the indented subclasses. The similarity relates, however, only to the tubular outer contact, because the shielded-cable connectors included in these subclasses (607+) are adapted to be secured to cables having at least one inner conductor whose longitudinal axis does not extend along the longitudinal axis of the cable, whereas the connectors in subclasses 578+ are adapted to be secured only to cables in which the longitudinal axes of all of the conductors coincide with the longitudinal axis of the cable.

(2) Note. Since electric fields induce noise voltages capactively, it is common to surround a connector or contact with a grounded conducting shield in order to reduce stray pickup from external sources or crosstalk between mutually insulated contacts. Since external magnetic fields induce noise currents inductively, it is common to surround a connector or contact with a high-permeability ferromagnetic enclosure which reduces the intensity of magnetic fields.

SEE OR SEARCH THIS CLASS, SUBCLASS:

88+, for an electrical connector which includes an elastomeric or nonmetallic conductive portion and which provides anti-inductive shielding.

92+, for an electrical connector having a specific provision to electrically connect a portion thereof to the earth for the purpose of providing a safety ground for the electrical connector, and see Note (2) above, and see the Notes appended to subclass 92.

125+, particularly subclass 126 for a spark plug cover or shield of an electrostatic suppressing nature. 274, 275, and 279, for an electrical connector combined with a distinct cable sheath sealing element or material, which connector may also provide inductive or capacitive shielding.

578+, for an electrical connector specifically adapted for use with coaxial cables, which connector often includes an inductive or capacitive shielding function, and see Note (1) above.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

35+, for a conductor in which an antiinductive shield is used, and see especially the Notes appended thereto for the location of other devices having antiinductive structure.