Low pass filter for a junction box

• US 6,018,278 A
• Filed: 01/29/1998
• Issued: 01/25/2000
• Est. Priority Date: 03/10/1997
• Status: Expired due to Term

• Current Assignee: Antronix Incorporated
• Original Assignee: Antronix Incorporated
• Inventors: Tang, Danny Q.
• Primary Examiner(s): Bettendorf, Justin P.
• Application Number:
  US09/015,396
• Time in Patent Office: 726 Days
• Field of Search: 333/182, 333/185, 333/100, 333/12, 333/260, 361/270, 361/302, 361/800, 361/816, 361/818, 439/620
• US Class Current: 333/100
• CPC Class Codes: H01R 13/5216 characterised by the sealing material, e.g. gels or resins
• CPC Class Codes: H01R 13/7197 with filters integral with or fitted onto contacts, e.g. tubular filters
• CPC Class Codes: H01R 2107/00 Four or more poles
• CPC Class Codes: H01R 24/52 mounted in or to a panel or structure
• CPC Class Codes: H01R 4/2433 one part of the base being movable to push the cable into the slot
• CPC Class Codes: H01R 4/70 Insulation of connections end caps H01R4/22
• CPC Class Codes: H02G 15/085 for coaxial cables or hollow conductors plug and socket connections between HF conductors H01P1/04; plug and socket connections per se H01R24/38
• CPC Class Codes: H03H 1/0007 of radio frequency interference filters
• CPC Class Codes: Y10S 439/936 Potting material or coating, e.g. grease, insulative coating, sealant or, adhesive

Abstract

In junction boxes for coupling T.V. signals and low frequency power waves on a coax line to a plurality of users, the T.V. signals are coupled via connections in a first compartment to a plurality of coax cables, and the low frequency power wave are coupled via low pass-filters to IDC connections in a second compartment.

Leads from users are passed through a chamber on the wall of the second compartment containing a self-healing, self-supporting insulating substance and attached to the IDC connectors. The IDC connectors permit the lead to be paired through them so that an installer can know when the leads are properly partitioned.

Claims

1. A junction box for distributing low frequency AC power and RF signals to a plurality of users comprising;

a first compartment;

input means for coupling low frequency AC power and RF signals into said first compartment;

means for coupling the RF signals to a plurality of outputs from said first compartment;

a second compartment;

a low pass filter having an input and an output connected between said first and second compartments;

means for coupling the input of said low pass filter to said input means for coupling low frequency AC power and RF signals into said first compartment;

a plurality of power output means in said second compartment; and

means for coupling the output of said low pass filter to each of said power output means.

2. The junction box as set forth in claim 1 wherein;

said first and second compartments have respective interior surfaces; and

said low pass filter has a feed through capacitor at its input that is in contact with the interior surface of said first compartment and a feed through capacitor at its output that is in contact with the interior surface of said second compartment.