EDWARD JAMES FARMER
Pilots at Shoreside Dr, Sacramento, CA

4498809, Feb 12, 1985

Jun 20, 1983

6/505941

Edward J. Farmer - Sacramento CA

E02B 720, E02B 740

405 92

A flow compensated controller for use in automatically controlling the water level in an open channel is disclosed. An electrical signal received from a transducer at a measuring location and corresponding to the actual water level in the channel at that location is amplified and compared with an amplified signal corresponding to the desired water level. An error signal corresponding to the difference between the two signals is fed into a proportional amplifier and also into an automatic reset unit. The outputs of the proportional amplifier and the automatic reset unit are fed into a summing amplifier. The output of the summing amplifier is fed into a motor modulation driver whose output is connected to a pair of gate operator relays, one relay connected for sending a control signal to the gate operator to move the gate in one direction and the other relay connected for sending a control signal to the gate operator to move the gate in the other direction. The two relays are connected to the gate operator through a third relay which is controlled by an oscillator driven time proportioning comparator which enables the control power to the gate operator at one portion of the time and disables the control power to the gate operator during the other portion of the time in order to allow the water level to stabilize after the gate position has been changed. During the disable period the time proportioning comparator also disables the automatic reset unit so that it is not integrating.

5458142, Oct 17, 1995

Mar 19, 1993

8/033900

Edward J. Farmer - Sacramento CA
Diane J. Hovey - Sacramento CA

A61B 500

1286531

A diagnostic and therapeutic instrument for use in the treatment of living organisms is provided including a sensor for detecting magnetic fields emanating from the living organism. The sensor is located proximate to the organism and is formed from a ferromagnetic core surrounded by a multi-turn fine wire coil. The sensor is coupled to signal processing which amplifies a signal from the sensor and filters out portions of the signal which represent background magnetic fields emanating from other sources. The signal from the sensor is utilizable to detect abnormalities in the field emanating from the organism indicative of the organism's well-being. The signal can also be utilized to excite a magnetic field radiator which outputs a field complementary to the field emanating from the organism.

5272646, Dec 21, 1993

Apr 11, 1991

7/684168

Edward J. Farmer - Sacramento CA

G01F 1500, G06F 1520

364509

A method and apparatus for determining the location of a leak in a fluid containing pipeline. Plural monitoring stations sample fluid flow criteria which change in the presence of a leak. The change in the criteria as a function of a variable such as time will allow extrapolation to discern the location. At each location either pressure or flow rate or both are measured. The measurements occur at regular intervals and a record of fluid flow criteria is created for each monitoring station. The record of each monitoring station is continually transmitted to a central location where a data processor analyzes the records and establishes the leak's location. One of three algorithms, or any combination thereof, is used by the data processor to calculate the leak's location. Each algorithm is tuned to the specific pipeline to compensate for unique characteristics thereof. An output device communicates the location of the leak to an operator or automatically takes appropriate action in response to the leak.

5315529, May 24, 1994

Oct 11, 1991

7/774805

Edward J. Farmer - Sacramento CA

G01F 2322

364509

A method, system and apparatus for monitoring an environment for the occurrence of an unexpected event, such as monitoring a containment vessel's surroundings for the presence of the contained substance outside of the vessel due to a leak. The method detects the probability that a leak has occurred as opposed to mere natural fluctuations in substance concentration in the surrounding environment. A sensor near the vessel measures substance concentration. The concentrations sensed are transformed into a signal representing substance concentration outside the vessel as a function of time. A statistical analyzer then monitors the signal for specific patterns which indicate that a leak has occurred. Various algorithms are utilizable to determine the probability that a leak has occurred.