George Edward Campbell, III
Physician at Mississippi, Denver, CO
License number
Colorado 26072
Issued Date
Jul 19, 1984
Renew Date
May 31, 1987
Expiration Date
May 31, 1987
Type
Physician
Address
Address
6476 E Mississippi Ave E MISSISSIPPI, Denver, CO 80222
Professional information
Utility Power Line Cable Selector System
US Patent:
2004014, Jul 29, 2004
Filed:
Jan 28, 2003
Appl. No.:
10/353920
Inventors:
George Campbell - Aurora CO, US
Eugene Campbell - Denver CO, US
Eugene Campbell - Denver CO, US
International Classification:
G08B021/00
US Classification:
340/635000, 324/527000, 324/066000
Abstract:
A utility power line cable selector system used by a lineman to eliminate guessing which buried cable in a ditch has been de-energized when compared to similar buried cables that are still energized with high voltage 60 Hz. power line current and disposed next to the de-energized cable. The selector system includes a battery operated low power 1 Hz. pulse generator adapted for connecting to a near end of a de-energized cable. The generator is designed to deliver a dc current spike and excite the otherwise de-energized conductor at one second intervals. At a far end of the de-energized cable is connected to a jumper cable. At a location midspan or between the near end and far end of the de-energized cable, the lineman holds a portable hand-held signal pick up clamp and cable detector unit. The signal pick up clamp is placed around a portion of each of the cables in the ditch. The cable detector unit includes an electronic filter, a pulse amplifier and a monstable multivibrator with audio and visual indicators to detect if the cable under test has the dc current spike or the test signal flowing through it's conductor. The filter is designed to prevent a response from 60 Hz. power line current in the energized cables and responds only to the conductor connected to the output from the pulse generator.