Murray B Davis

US Patent:

44207522, Dec 13, 1983

Filed:

Jan 9, 1981

Appl. No.:

6/223608

Inventors:

Murray W. Davis - Harper Woods MI
Matthew J. Diedzic - Dearborn MI
Robert F. Knapp - Livonia MI
Bruce F. Whitney - South Lyon MI

International Classification:

G01D 512
H04B 354

US Classification:

34087017

Abstract:

A system for monitoring at least one parameter of either an energized electrical power line conductor or at least one parameter adjacent to the power line conductor, on a real-time basis and transmitting signals indicative of the parameter to a remote location where the power line conductor itself is the transmission medium for transmitting the signals to the remote location. The transmitter is powered by either the electric or the electromagnetic field of the energized power line conductor and the transmitter receives induced energy from the conductor via a plurality of turns of wire wound around a mandrel, with the plurality of turns of wire formed as the secondary winding of a transformer, and with the mandrel being at the same electrical potential as the conductor.

US Patent:

48068551, Feb 21, 1989

Filed:

Jun 12, 1987

Appl. No.:

7/061342

Inventors:

Murray W. Davis - Harper Woods MI

International Classification:

G01R 122

US Classification:

324127

Abstract:

A system for determining the current carrying capability of one or more overhead power transmission lines monitors one or more spans of each line on real-time basis and identifies the span having the lowest current carrying capacity which in turn establishes the maximum capacity of the entire line. The thermal state of each monitored line span is determined by measuring the conductor temperature, line current, solar radiation, ambient temperature, and in some cases wind speed and wind direction. These parameters are monitored by a sensor-transmitter unit that may be removably clamped on the line conductor which may range in size from one to several inches in diameter, and includes a radio transmitter for transmitting sensed data to a receiving substation. The data from the sensor-transmitter is multiplexed and transmitted by a telecommunications link to a computer which automatically determines line capacity using the real-time data and also calculates the time required for the "critical span" having the lowest current capacity to reach its maximum safe temperature based on any of a number of step changes in load demands. Each sensor-transmitter may include sensors for monitoring the current level, conductor temperature, solar radiation impinging on the conductor, ambient temperature, wind direction and velocity and conductor sag.

US Patent:

60520922, Apr 18, 2000

Filed:

Jan 12, 1998

Appl. No.:

9/005812

Inventors:

Murray W. Davis - Grosse Pointe Woods MI
Bruce F. Conrad - Clawson MI
Carl M. Fucinari - Troy MI

Assignee:

The Detroit Edison Company - Detroit MI

International Classification:

H01Q 118

US Classification:

343757

Abstract:

A wireless telecommunication antenna mount has a platform which carries a plurality of antennas. The platform is mounted on a pedestal in an angularly adjusted position. The pedestal is mounted on the top of an electric power transmission tower in a position above the tower.

US Patent:

51402572, Aug 18, 1992

Filed:

Aug 5, 1991

Appl. No.:

7/741964

Inventors:

Murray W. Davis - Harper Woods MI

International Classification:

G01R 120
G08B 2100

US Classification:

324106

Abstract:

A system for determining the current carrying capability of one or more overhead power transmission lines monitors one or more spans of each line on real-time basis and identifies the span having the lowest current carrying capacity which in turn establishes the maximum capacity of the entire line. The thermal state of each monitored line span is determined by measuring the conductor temperature, line current, solar radiation, ambient temperature, and in some cases wind speed and wind direction. These parameters are monitored by a sensor-transmitter unit that may be removably clamped on the line conductor which may range in size from one to several inches in diameter, and includes a radio transmitter for transmitting sensed data to a receiving substation. The data from the sensor-transmitter is multiplexed and transmitted by a telecommunications link to a computer which automatically determines line capacity using the real-time data and also calculates the time required for the "critical span" having the lowest current capacity to reach its maximum safe temperature based on any of a number of step changes in load demands. Each sensor-transmitter may include sensors for monitoring the current level, conductor temperature, solar radiation impinging on the conductor, ambient temperature, wind direction and velocity and conductor sag.

US Patent:

53410882, Aug 23, 1994

Filed:

Jul 13, 1992

Appl. No.:

7/912813

Inventors:

Murray W. Davis - Harper Woods MI

International Classification:

G01R 2102

US Classification:

324106

Abstract:

A system for determining the current carrying capability of one or more overhead power transmission lines monitors one or more spans of each line on real-time basis and identifies the span having the lowest current carrying capacity which in turn establishes the maximum capacity of the entire line. The thermal state of each monitored line span is determined by measuring the conductor temperature, line current, solar radiation, ambient temperature, and in some cases wind speed and wind direction. These parameters are montiored by a sensor-transmitter unit that may be removably clamped on the line conductor which may range in size from one to several inches in diameter, and includes a radio transmitter for transmitting sensed data to a receiving substation. The data from the sensor-transmitter is multiplexed and transmitted by a telecommunications link to a computer which automatically determines line capacity using the real-time data and also calculates the time required for the "critical span" having the lowest current capacity to reach its maximum safe temperature based on any of a number of step changes in load demands. Each sensor-transmitter may include sensors for monitoring the current level, conductor temperature, solar radiation impinging on the conductor, ambient-temperature, wind direction and velocity and conductor sag.

US Patent:

47288876, Mar 1, 1988

Filed:

Jun 22, 1984

Appl. No.:

6/623842

Inventors:

Murray W. Davis - Harper Woods MI

International Classification:

G01R 122

US Classification:

324127

Abstract:

A system for determining the current carrying capability of one or more overhead power transmission lines monitors one or more spans of each line on real-time basis and identifies the span having the lowest current carrying capacity which in turn establishes the maximum capacity of the entire line. The thermal state of each monitored line span is determined by measuring the conductor temperature, line current, solar radiation, ambient temperature, and in some cases wind speed and wind direction. These parameters are monitored by a sensor-transmitter unit that may be removably clamped on the line conductor which may range in size from one to several inches in diameter, and includes a radio transmitter for transmitting sensed data to a receiving substation. The data from the sensor-transmitter is multiplexed and transmitted by a telecommunications link to a computer which automatically determines line capacity using the real-time data and also calculates the time required for the "critical span" having the lowest current capacity to reach its maximum safe temperature based on any of a number of step changes in load demands. Each sensor-transmitter may include sensors for monitoring the current level, conductor temperature, solar radiation impinging on the conductor, ambient temperature, wind direction and velocity and conductor sag.

US Patent:

42688183, May 19, 1981

Filed:

Mar 20, 1978

Appl. No.:

5/888143

Inventors:

Murray W. Davis - Harper Woods MI
Matthew J. Diedzic - Dearborn MI
Robert F. Knapp - Livonia MI
Bruce F. Whitney - South Lyon MI

International Classification:

G01D 512
H04B 354

US Classification:

34087038

Abstract:

Apparatus for directly monitoring the conductor temperature or other parameters of an energized electric power line conductor, or of the medium adjacent the conductor, on a real time basis, and transmitting a signal indicative of that parameter to a remote location such as to facilitate data processing by computer. The apparatus is powered by the electric or electromagnetic field of the electric power line conductor. Various embodiments are described for sensing the temperature or other parameter being monitored. Furthermore two techniques are described for transmitting the signal to a remote location. The first such technique is the use of air as the transmission medium and the second technique uses the power line conductor itself as the transmission medium.

US Patent:

48272728, May 2, 1989

Filed:

Dec 23, 1986

Appl. No.:

6/945189

Inventors:

Murray W. Davis - Harper Woods MI

International Classification:

G01R 122

US Classification:

343702

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.