Brian D Dawson

US Patent:

6354345, Mar 12, 2002

Filed:

Jun 28, 1999

Appl. No.:

09/340882

Inventors:

Frederick Alan Nabity - Lincoln NE
Robert Raymond Fiedler - Lincoln NE
James Paul Masek - Lincoln NE
Brian D. Dawson - Lincoln NE
Russell Todd Barker - Lincoln NE
Ralph E. Setter - Lincoln NE
Paul George Wright - Garland NE
Larry Lee Fritz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

B65B 300

US Classification:

141284, 141130

Abstract:

To pump fluid into sample containers, a distributor arm of a sample collector is calibrated as to position in a computer memory and is moved from position to position over different containers while a counter in computer memory keeps track of its position. When the distributor arm is over the designated container, samples are pumped into the container. To pump the fluid into the container, the rollers of a peristaltic pump are supported to prevent the rollers from compressing the tube more than the thickness of the walls of the tube. A tube holder rotates along with the roller assembly of the peristaltic pump and keeps the tube in line with the rollers.

US Patent:

56523971, Jul 29, 1997

Filed:

Apr 19, 1995

Appl. No.:

8/424226

Inventors:

Brian D. Dawson - Lincoln NE
Richard D. Hartz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

G01N 120

US Classification:

7386361

Abstract:

A composite wastewater sampler includes a flow-through-chamber having an inlet port and an outlet port with a path between them that gradually increases in depth and width and then decreases in width. It is shaped to cause fluid to: (1) flow from the inlet port; (2) drop to a lower level of flow within the flow-through-chamber; (3) gradually adjust in cross-sectional shape to the outlet port; and (4) flow back into a wastewater pipe. A sampling nozzle extends into the flow-through-chamber adjacent to the inlet port and within the path of the downwardly flowing wastewater so that wastewater exiting the port contacts the nozzle and flows downwardly across it.

US Patent:

61788317, Jan 30, 2001

Filed:

Jun 25, 1997

Appl. No.:

8/882089

Inventors:

Brian D. Dawson - Lincoln NE
Richard D. Hartz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

G01N 120

US Classification:

7386361

Abstract:

A composite wastewater sampler includes a flow-through-chamber having an inlet port and an outlet port with a path between them that gradually increases in depth and width and then decreases in width. It is shaped to cause fluid to: (1) flow from the inlet port; (2) drop to a lower level of flow within the flow-through-chamber; (3) gradually adjust in cross-sectional shape to the outlet port; and (4) flow back into a wastewater pipe. A sampling nozzle extends into the flow-through-chamber adjacent to the inlet port and within the path of the downwardly flowing wastewater so that wastewater exiting the port contacts the nozzle and flows downwardly across it.

US Patent:

46823484, Jul 21, 1987

Filed:

May 16, 1985

Appl. No.:

6/734554

Inventors:

Brian D. Dawson - Lincoln NE
James R. Leacock - Lincoln NE

Assignee:

Emhart Industries, Inc. - Indianapolis IN

International Classification:

H04M 1104

US Classification:

379 37

Abstract:

A life safety system for monitoring a building has a plurality of detectors for detecting alarm conditions located throughout the building, a plurality of speakers located throughout the building, a source of pre-stored voice messages which can be broadcast over the speakers, and a telephone network. The improvement is a voice synthesizer for providing the source of pre-stored voice messages and a constant volume telephone system. The constant volume telephone system has a telephone line and a plurality of telephones which can be connected to the telephone line, and a power supply having an adjustable output voltage which provides the voltage for the telephone line. A sensing and adjusting circuit senses the number of telephones off-hook and causes the power supply to be adjusted in response to the number of telephones off-hook.

US Patent:

55765033, Nov 19, 1996

Filed:

Feb 13, 1995

Appl. No.:

8/387595

Inventors:

Frederick A. Nabity - Lincoln NE
Robert R. Fiedler - Lincoln NE
James P. Masek - Lincoln NE
Brian D. Dawson - Lincoln NE
Russell T. Barker - Lincoln NE
Frederick D. Sueverkruepp - Lincoln NE
Ralph E. Setter - Lincoln NE
Paul G. Wright - Pleasant Dale NE
Larry L. Fritz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

G01N 114

US Classification:

7386301

Abstract:

To select a designated bottle in a sampler, the distributor is calibrated as to position and the outlet of the distributor arm is moved over the desired bottle by counting changes in incremental angular movement of the distributor arm until it is over the bottle. The position of the distributor arm is recorded in memory. To calibrate the distributor, the arm is rotated against a stop member in a first direction, then in a second direction and the overrun of in excess of 360 degrees of the motion of the distributor arm is determined and corrected. A series of random numbers is generated for depositing of samples, the distributor is moved at designated times over the bottles in a random order to deposit a sample and the ordering of bottles is recorded. The rollers of a peristaltic pump are supported to prevent said rollers from compressing said tube more than the thickness of the walls of the tube. A functional module for a bubbler or pH probe or ultrasonic level detector may be connected to the housing.

US Patent:

59159324, Jun 29, 1999

Filed:

Feb 6, 1996

Appl. No.:

8/597284

Inventors:

Frederick Alan Nabity - Lincoln NE
Robert Raymond Fiedler - Lincoln NE
James Paul Masek - Lincoln NE
Brian D. Dawson - Lincoln NE
Russell Todd Barker - Lincoln NE
Frederick Detlef Sueverkruepp - Lincoln NE
Ralph E. Setter - Lincoln NE
Paul George Wright - Garland NE
Larry Lee Fritz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

F04B 4308

US Classification:

4174771

Abstract:

The rollers of a peristaltic pump are supported to prevent said rollers from compressing said tube more than the thickness of the walls of the tube. A tube holder rotates along with the roller assembly of the peristaltic pump and keeps the tube in line with the rollers.

US Patent:

46835911, Jul 28, 1987

Filed:

Apr 29, 1985

Appl. No.:

6/728408

Inventors:

Brian D. Dawson - Lincoln NE
James R. Leacock - Lincoln NE

Assignee:

Emhart Industries, Inc. - Indianapolis IN

International Classification:

H03F 2100

US Classification:

381 85

Abstract:

A proportional audio power demand system has a plurality of speaker banks and a plurality of amplifiers. Each speaker bank has at least one speaker. The system also has at least one audio channel and each amplifier and speaker bank can be selectively coupled to the audio channel. The system includes a controller which causes at least one amplifier and speaker bank to be coupled to the channel. The system also includes a sensor which senses the power output of the amplifier. The sensor is coupled to the amplifier and controller and the controller responds to the sensed power output of the amplifier to determine when to cause an additional amplifier to be coupled to the channel.

US Patent:

53416902, Aug 30, 1994

Filed:

Oct 13, 1989

Appl. No.:

7/421559

Inventors:

Brian D. Dawson - Lincoln NE
Richard D. Hartz - Lincoln NE

Assignee:

Isco, Inc. - Lincoln NE

International Classification:

G01N 114
G01N 120

US Classification:

7386361

Abstract:

A composite wastewater sampler includes a flow-through-chamber having an inlet port and an outlet port with a path between them that gradually increases in depth and width and then decreases in width. It is shaped to cause fluid to (1) flow from the inlet port; (2) drop to a lower level of flow within the flow-through-chamber; (3) gradually adjust in cross-sectional shape to the outlet port; and (4) flow back into a wastewater pipe. A sampling nozzle extends into the flow-through-chamber adjacent to the inlet port and within the path of the downwardly flowing wastewater so that wastewater exiting the port contacts the nozzle and flows downwardly across it.