Patents Assigned to Northeast Filter Co., Inc.
  • Patent number: 4845447
    Abstract: A trap filter assembly of the type employed with a video cable system to block a particular band of video frequencies has a housing formed as a generally rectangular block of square cross-section, made of cast aluminum or other suitable material. A cavity formed in the housing has first and second compartments which are separated from one another by a pair of barrier walls that define therebetween a channel passageway that extends from one corner of the first cavity compartment to a laterally opposite corner of the second cavity compartment. This prevents any direct line of sight signal path for stray video signals between the first and second compartments. First and second printed circuit filter boards are mounted in the compartments, preferably by a threaded fastener which mounts the boards onto respective pedestals in the compartments. A bare-braid coax conductor passes through the channel between the barrier walls and unites the signal paths on the two boards in the respective compartments.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: July 4, 1989
    Assignee: Northeast Filter Co., Inc.
    Inventor: Timothy M. Holdsworth
  • Patent number: 4701726
    Abstract: A trap filter assembly, of the type which can be employed with a video cable system to block a particular channel or band of channels and pass the remaining video signal, is formed of a circuit board, a centrally-disposed cylindrical ground block, and a housing formed of male and female housing halves which are press-fit over the circuit board onto the ground block. The housing halves form a solderless connection with the ground block, and the latter forms a solderless connection with ground pads on the printed circuit board. A slot cut in the cylindrical ground block receives the printed circuit board, and a zig-zag channel structure formed in one wall of the slot permits a zig-zag signal lead to extend from one end of the printed circuit board through a ground area of the board, to the other end thereof.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: October 20, 1987
    Assignee: Northeast Filter Co., Inc.
    Inventor: Timothy M. Holdsworth