Overhead power line clamp and antenna

• US 4,827,272 A
• Filed: 12/23/1986
• Issued: 05/02/1989
• Est. Priority Date: 06/04/1984
• Status: Expired due to Term

• Current Assignee: Murray W. Davis
• Original Assignee: Murray W. Davis
• Inventors: Davis, Murray W.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Wimer, Michael C.
• Application Number:
  US06/945,189
• Time in Patent Office: 861 Days
• Field of Search: 343/703, 343/793, 343/702, 343/720, 343/894, 324/126, 324/127, 324/129, 324/133, 324/149, 340/870.17, 340/870.38, 339/109, 339/264 R, 339/264 L, 439/479
• US Class Current: 343/702
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers
• CPC Class Codes: G01R 15/14 Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
• CPC Class Codes: H01Q 1/46 Electric supply lines or communication lines

Abstract

A clamp and antenna for an overhead power line conductor includes a C shaped housing having upper and lower jaws movable relative to each other for securing the clamp to the overhead power line. A power supply is positioned in the housing and is energized by current following through the power line. A transmitter, powered by the power supply, transmits data using a portion of the housing as an antenna. The antenna provides a guide for an actuator for moving the jaws of the housing relative to each other.

Claims

1. In an overhead power line housing and antenna of the type adapted to engage a conductor and including at least one sensor, a transmitter energized by a power supply and an antenna operatively coupled to said transmitter, said conductor having an elongated axis, the improvement comprising:

said housing having first, second and third spaced apart jaws with one jaw being movble in relation to the other jaws;

said housing being essentially corona free;

said first and second jaws being spaced apart in a first direction along the axis of said conductor and said third jaw being intermediate said first and second jaws in said first direction and spaced apart therefrom in a second direction such that upon engagement with said conductor, the conductor is biased in a concave orientation facing toward said third jaw relative to said other jaws; and

means for moving said third jaw relative to said other jaws.

2. The invention as defined in claim 1 wherein said housing is C-shaped.

3. The invention as defined in claim 1 wherein said housing is C-shaped and said second jaw is positioned in the upper portion of said C-shaped housing.

4. The invention as defined in claim 1 wherein said third jaw is linearly movable toward and away from said second jaw.

5. The invention as defined in claim 1 wherein said first and second spaced apart jaws prevent rotation of the housing about any axis perpendicular to said axis of said conductor.

6. The invention as defined in claim 1 wherein each of said first and second jaws include curved recesses to receive and align said conductor.

7. The invention as defined in claim 1 wherein said antenna has a base grounded on the housing at the potential of said conductor.

8. The invention as defined in claim 1 wherein said antenna includes a guide for said jaw moving means.

9. The invention as defined in claim 1 wherein said antenna is a dipole antenna.

10. The invention as defined in claim 1 wherein said antenna is an essentially corona-free dipole antenna.

11. The invention is defined in claim 1 wherein said jaw moving means includes a lead screw operably coupled to said third jaw.

12. The invention as defined in claim 11 wherein said jaw moving means includes an actuator means removable from said housing.

13. The invention as defined in claim 12 wherein said actuator means includes an elongated tube having first and second slots, said first slot for rotating said lead screw and said second slot for preventing accidental disengagement between said elongated tube and said lead screw.

14. In an overhead power line housing and antenna of the type including at least one sensor, a transmitting energized by a power supply and an antenna operatively coupled to said transmitter, the improvement comprising:

said housing having at least two, first and second spaced apart jaws and a third jaw being movable in relation to the first and second jaws;

means for moving said third jaw;

a pair of fixed spaced apart members each mounted to one of the first and second jaws and defining an open space between said first and second spaced apart members;

whereby upon engagement with a conductor, the third jaw can be moved to clamp the conductor between the three jaws and bias the conductor into the open space between the spaced apart members; and

said antenna being at the same electrical potential as said conductor.

15. The invention as defined in claim 14, wherein each of said jaws includes curved recesses to receive and align said conductor.

16. The invention as defined in claim 14, wherein said antenna includes a guide communicating with said jaw moving means;

and

an actuator means operable with said guide to operate said moving means and move said third jaw relative to said two jaws.

17. The invention as defined in claim 16 wherein said jaw moving means includes a lead screw operably coupled to said third jaw and adapted to operably receive said actuator means;

said actuator means including an elongated tube having first and second slots, said first slot for rotating said lead screw and said second slot for preventing accidental disengagement between said elongated tube and said lead screw.

18. In an overhead power line housing and antenna of the type including at least one sensor, a transmitter energized by a power supply and an antenna operatively coupled to said transmitter, the improvement comprising:

said housing having two spaced apart jaws with one jaw being movable in relation to the other jaw for clamping a conductor therebetween;

moving means operatively interconnected to said one jaw for moving said one jaw in relation to said other jaw; and

an actuator means for operating said moving means for moving said one jaw;

said antenna being integral with said housing and having an opening therein which terminates at said moving means for receiving and guiding said actuator means when said actuator means is operating said moving means whereby upon engagement with a conductor the one jaw can be moved by said actuator means to clamp the conductor between the jaws.

19. The invention of claim 18, wherein said moving means includes a lead screw operably coupled to said one jaw and adapted to operably receive said actuator means;

said actuator means including an elongated tube having first and second slots, said first slot for rotating said lead screw and said second slot for preventing accidental disengagement between said elongated tube and said lead screw.