Filter

Claim 2

A filter comprising: a hollow, cylindrically shaped dielectric; a pair of spaced-apart electrodes, one of which is located on each of the respective end surfaces of the dielectric and formed thereon to cover the entire surface area thereof so that the length of the cylindrical dielectric defines the insulating gap between said electrodes along both its inner and outer peripheral surfaces; a conductor passing through said dielectric in a coaxial, spaced relationship therewith for conducting direct and low frequency currents, said conductor being electrically coupled with one of said electrodes; a ferrite member operatively positioned with respect to said conductor for absorbing high frequency noise signals traveling along the length thereof; an electrical connector suitable for connecting the filter to a chassis, connected to the other of said electrodes; and a synthetic resin mold surrounding and integrally bonding the dielectric, the conductor, and the ferrite member but allowing the respective ends of the conductor and a portion of the electrical connector for connecting the filter to the chassis to project out of said resin mold.

Claim 3

A filter comprising: a hollow, cylindrically shaped dielectric; a pair of spaced-apart electrodes, one of which is located on each of the respective end surfaces of the dielectric anD formed thereon to cover the entire surface area thereof so that the length of the cylindrical dielectric defines the insulating gap between said electrodes along both its inner and outer peripheral surfaces; a conductor threaded at both ends and passing through said dielectric in a coaxial, spaced relationship therewith for conducting direct and low frequency currents; a first electrical connector in contact with one of said electrodes and coupling the electrode with said connector; a second electrical connector suitable for connecting the filter to a chassis, connected to the other of said electrodes; at least one ferrite ring positioned about said conductor for absorbing high frequency noise signals passing along the length thereof; and a synthetic resin mold surrounding and integrally bonding the dielectric, the first electrical connector, the conductor and the ferrite ring but allowing both threaded ends of the conductor and a portion of said second electrical connector to project out of said resin mold.

Claim 4

A filter comprising: a hollow, cylindrically shaped dielectric; a pair of spaced-apart electrodes, one of which is located on each of the respective end surfaces of the dielectric anD formed thereon to cover the entire surface area thereof so that the length of the cylindrical dielectric defines the insulating gap between said electrodes along both its inner and outer peripheral surfaces; a conductor threaded at both ends and passing through said dielectric in a coaxial, spaced relationship therewith for conducting direct and low frequency currents; a first electrical connector in contact with one of said electrodes and coupling the electrode with said connector; a second electrical connector suitable for connecting the filter to a chassis, connected to the other of said electrodes; at least one ferrite ring positioned about said conductor for absorbing high frequency noise signals passing along the length thereof; and a synthetic resin mold surrounding and integrally bonding the dielectric, the first electrical connector, the conductor and the ferrite ring but allowing both threaded ends of the conductor and a portion of said second electrical connector to project out of said resin mold.

Claim 5

A filter comprising: a hollow, cylindrically shaped ceramic dielectric; a pair of spaced-apart electrodes, one of which is located on each of the respective end surfaces of the dielectric and formed thereon to cover the entire surface area thereof so that the length of the cylindrical dielectric defines the insulating gap between the electrodes along both its inner and outer peripheral surfaces; a first electrical connector, having a cylindrical recessed portion with a threaded member projecting outwardly from the end surface thereof, connected to one of said electrodes; a cylindrical ferrite member projecting into said recessed member and passing through said dielectric in spaced relationships therewith; a conductive coil positioned about the ferrite member, said coil being connected at one end to said first electrical connector; a second electrical connector suitable for coupling the filter to a chassis, connected to the other of said electrodes; a conductor member having a threaded portion extending outwardly beyond said second electrical connector coupled to the other end of said coil; and a synthetic resin mold surrounding and integrally bonding the dielectric, the first and second electrical connectors, the ferrite member, the coil and the conductor member, but allowing the threaded portions of the first electrical connector and the conductor member together with a portion of the second electrical connector to project out of said resin mold.

Claim 6

A filter comprising: a hollow, cylindrically shaped ceramic dielectric; a pair of spaced-apart electrodes, one of which is located on each of the respective end surfaces of the dielectric and formed thereon to cover the entire surface area thereof so that the length of the cylindrical dielectric defines the insulating gap between the electrodes along both its inner and outer peripheral surfaces; a first electrical connector, having a cylindrical recessed portion with a threaded member projecting outwardly from the end surface thereof, connected to one of said electrodes; a cylindrical ferrite member projecting into said recessed member and passing through said dielectric in spaced relationships therewith; a conductive coil positioned about the ferrite member, said coil being connected at one end to said first electrical connector; a second electrical connector suitable for coupling the filter to a chassis, connected to the other of said electrodes; a conductor member having a threaded portion extending outwardly beyond said second electrical connector coupled to the other end of said coil; and a synthetic resin mold surrounding and integrally bonding the dielectric, the first and second electrical connectors, the ferrite member, the coil and the conductor member, but allowing the threaded portions of the first electrical connector and the conductor member together with a portion of the second electrical connector to project out of said resin mold.

Claim 7

A filter as set forth in claim 3, in combination with a second similar filter wherein, both filters are bonded to a single second electrical connector for coupling the filters to a chassis and integrally bonded in a spaced relationship with one another in said resin mold.