Interior network ground
View Patent ↗In one embodiment, a grounding bracket is provided for apparatus, such as optical network terminals (ONTs), for grounding interior electrical wiring such as coaxial cables that are electrically coupled with fiber optic fed devices. The grounding bracket provides an electrically conductive pathway for the coaxial cable, which pathway carries current safely to a ground wire from the coaxial cable. The grounding bracket carries all of the current from the coaxial cable to the ground wire without relying upon any printed circuit board (PCB) traces of the ONT to carry current to the ground wire.
1. A grounding bracket for grounding a coaxial cable connected to a barrel of an electronic device, the coaxial cable having an inner conductor and an outer conductive sheath electrically separated from the inner conductor, the barrel having a conductive inner port and a conductive outer surface electrically separated from the conductive inner port, the grounding bracket comprising:
a body of an electrically conductive material, the body including a first portion and a second portion, wherein:
the first portion is adapted to be electrically connected directly to the conductive outer surface of the barrel of the electronic device;
the second portion, electrically connected to the first portion, is adapted to be electrically connected to a ground wire, such that the grounding bracket provides a grounding path between the conductive outer sheath of the coaxial cable and the ground wire via the conductive outer surface of the barrel;
the first portion includes an aperture for receipt on the barrel, the aperture configured for seating on the conductive outer surface of the barrel; and
the first portion of the grounding bracket comprises:
a central member including the aperture;
a first lateral flange extending from the central member; and
an arm member extending from the lateral flange and electrically connected to the second portion.
2. The grounding bracket of claim 1 , wherein the first portion and the second portion are a unitary member.
3. The grounding bracket of claim 1 , wherein the first portion and the second portion are separate members in electrical communication.
4. The grounding bracket of claim 1 , wherein the first portion includes a flange for electrically coupling with a ground of a printed circuit board (PCB).
5. The grounding bracket of claim 1 , wherein the second portion includes a first bore for receiving a ground wire.
6. The grounding bracket of claim 5 , wherein the second portion includes a second bore to accommodate a screw to clamp the ground wire into electrical contact with the second portion, the second bore in communication with the first bore.
7. The grounding bracket of claim 6 , wherein the first bore is oriented substantially perpendicular with respect to the second bore.
8. The invention of claim 1 , wherein the electronic device is adapted for mounting within a housing, and the first and second portions of the grounding bracket have dimensions that conform to dimensions of the housing.
9. The invention of claim 1 , wherein (i) the electronic device is a printed circuit board assembly and (ii) the first and second portions of the grounding bracket have dimensions that conform to dimensions of the printed circuit board assembly.
10. The invention of claim 1 , wherein:
the first lateral flange extends approximately perpendicularly from the central member; and
the arm member extends approximately perpendicularly from the first lateral flange.
11. The invention of claim 1 , wherein the first portion has a first corner between the central member and the lateral flange and a second corner between the lateral flange and the arm member.
12. The invention of claim 11 , wherein the first portion is approximately L-shaped if the first and second corners are straightened.
13. The invention of claim 1 , wherein the first portion further comprises a second lateral flange (e.g., 436 ) extending from the central member for electrically coupling with a ground of a printed circuit board (PCB).
14. An electronic device comprising:
signal processing circuitry for converting received signals into electrical signals;
a connector for a coaxial cable for carrying electrical signals, the connector electrically coupled with the signal processing circuitry, the connector including a barrel having a conductive inner port and a conductive outer surface electrically separated from the conductive inner port;
a printed circuit board (PCB) for supporting the signal processing circuitry and the connector, the printed circuit board including a ground; and
a grounding bracket for grounding a coaxial cable connected to the barrel, the coaxial cable having an inner conductor and an outer conductive sheath electrically separated from the inner conductor, the grounding bracket including:
a first portion adapted to electrically couple (i) directly to the conductive outer surface of the barrel, and (ii) to the PCB ground; and
a second portion, electrically connected to the first portion and adapted to be electrically connected to a ground wire, such that the grounding bracket provides a grounding path between the conductive outer sheath of the coaxial cable and the PCB ground, and the ground wire, wherein:
the first portion includes an aperture for receipt on the barrel, the aperture configured for seating on the conductive outer surface of the barrel; and
the first portion of the grounding bracket comprises:
a central member including the aperture;
a first lateral flange extending from the central member; and
an arm member extending from the lateral flange and electrically connected to the second portion.
15. The invention of claim 14 , wherein the electronic device is an optical network terminal (ONT).
16. The invention of claim 14 , wherein the first portion and the second portion are a unitary member.
17. The invention of claim 14 , wherein the first portion and the second portion are separate members in electrical communication.
18. The invention of claim 17 , wherein the first portion includes an aperture for receipt on the barrel, the aperture configured for seating on the conductive outer surface of the barrel.
19. The invention of claim 18 , wherein the first portion includes a flange attached to the PCB ground.
20. The invention of claim 17 , wherein the grounding bracket is adapted to be mechanically supported by the barrel and has no mounting holes for receiving mechanical support other than the aperture.
21. The invention of claim 14 , wherein the second portion includes a first bore for receiving a ground wire.
22. The invention of claim 21 , wherein the second portion includes a second bore to accommodate a screw to clamp the ground wire into electrical contact with the second portion.
23. The invention of claim 22 , wherein the first bore is oriented substantially perpendicular with respect to the second bore.
24. A method for grounding an interior coaxial cable comprising:
providing a grounding bracket for grounding a coaxial cable;
creating a grounding path comprising:
placing a first portion of the grounding bracket into direct electrical contact with an electrically conductive outer surface of a barrel of an electronic device;
electrically coupling a second portion of the grounding bracket with a ground wire; and
connecting a coaxial cable on the barrel, wherein:
the conductive sheath of the coaxial cable is electrically coupled with the grounding path,
the first portion includes an aperture for receipt on the barrel, the aperture configured for seating on the conductive outer surface of the barrel; and
the first portion of the grounding bracket comprises:
a central member including the aperture;
a first lateral flange extending from the central member; and
an arm member extending from the lateral flange and electrically connected to the second portion.
25. The method of claim 24 , wherein the ground wire connects to a ground source, the ground source defining an end of the grounding path.
26. The method of claim 25 , further comprising electrically coupling the grounding bracket to a ground on a printed circuit board.
27. A new use of a grounding bracket to ground a coaxial cable having an inner conductor and an outer conductive sheath electrically separated from the inner conductor, the grounding bracket comprising an electrically conductive body including (a) a first portion adapted to be electrically connected to the conductive outer surface of the barrel and (b) a second portion electrically connected to the first portion and adapted to be electrically connected to a ground wire, such that the grounding bracket provides a grounding path between the conductive outer sheath of the coaxial cable and the ground wire via the conductive outer surface of the barrel, the new use comprising:
creating a grounding path, comprising:
placing a first portion of the grounding bracket into direct electrical contact with an electrically conductive outer surface of a barrel of a coaxial-cable terminal of one of (i) an electronic device, (ii) a network terminal box, (iii) a coaxial-cable distribution box, (iv) a printed circuit board assembly, and (v) an interior optical network terminal;
electrically coupling a second portion of the grounding bracket with a ground wire; and
connecting the coaxial cable on the barrel, wherein:
the conductive sheath of the coaxial cable is electrically coupled with the grounding path,
the first portion includes an aperture for receipt on the barrel, the aperture configured for seating on the conductive outer surface of the barrel; and
the first portion of the grounding bracket comprises:
a central member including the aperture;
a first lateral flange extending from the central member; and
an arm member extending from the lateral flange and electrically connected to the second portion.