Timothy J O'Donnell

US Patent:

7064290, Jun 20, 2006

Filed:

Sep 8, 2003

Appl. No.:

10/655685

Inventors:

George D. Blankenship - Chardon OH, US
Russell K. Myers - Hudson OH, US
Timothy M. O'Donnell - Chesterland OH, US

Assignee:

Lincoln Global, Inc. - Santa Fe Springs CA

International Classification:

B23K 9/09

US Classification:

21913051, 21913021

Abstract:

An operating system is provided for an electric arc welder including a high switching speed inverter power source for creating an arc voltage and arc current between an electrode and a workpiece. This operating system regulating the arc voltage to provide a voltage with a slope by using an error circuit to create an error output and having a first input with a signal representing the set voltage and a second input representing the sum of the actual arc voltage and the actual arc current multiplied by a slope constant. A DSP program reduces the error output by adjusting the voltage output of the inverter power source to change the actual arc voltage. The slope constant is in the range of 0–10%.

US Patent:

7091445, Aug 15, 2006

Filed:

Jun 26, 2003

Appl. No.:

10/603322

Inventors:

Russell K. Myers - Hudson OH, US
William S. Houston - Avon OH, US
Timothy M. O'Donnell - Chesterland OH, US
Robert Hasan - Euclid OH, US

Assignee:

Lincoln Global, Inc. - Santa Fe Springs CA

International Classification:

B23K 9/09

US Classification:

21913032, 21913051

Abstract:

Electric arc welder () performs a given weld process with selected current waveform performed between electrode () and workpiece (). Welder () includes a controller with a digital processor (), sensor () for reading instantaneous weld current, and circuit () to convert the instantaneous current into a digital representation of the level of instantaneous weld current. Digital processor () has program circuit () to periodically read and square the digital representation at a given rate, register () for summing a number N of square digital representations to give a summed value, and an algorithm () for periodically dividing the summed value by the number N to provide a quotient and then taking the square root of said quotient to thereby digitally construct rms signal () representing the root mean square of the weld current.

US Patent:

7105773, Sep 12, 2006

Filed:

Jan 12, 2004

Appl. No.:

10/754836

Inventors:

Russell K. Myers - Hudson OH, US
Timothy M. O'Donnell - Chesterland OH, US
Alonzo P. O. Yost - North Canton OH, US

Assignee:

Lincoln Global, Inc. - Sante Fe Springs CA

International Classification:

B23K 9/09

US Classification:

21913051

Abstract:

An electric arc welder for depositing weld metal along a groove between two edges of a metal workpiece where the welder comprises a first electrode driven by a first wire feeder toward a point in said groove, a second electrode driven by a second wire feeder toward the point and a main power source with a first output terminal connected to the first electrode and a second output terminal connected both to the second electrode and directly or indirectly to the metal workpiece to create a second electrode path and a workpiece path. The power source includes a high speed switching output stage for creating current with a selected AC waveform between the first and second output terminals where the waveform of the main power source is generated by a waveform generator controlling a pulse width modulator circuit to determine the current operation of the output stage.

US Patent:

7217904, May 15, 2007

Filed:

Nov 7, 2005

Appl. No.:

11/268440

Inventors:

George D. Blankenship - Chardon OH, US
Russell K. Myers - Hudson OH, US
Timothy M. O'Donnell - Chesterland OH, US

Assignee:

Lincoln Global, Inc. - City of Industry CA

International Classification:

B23K 9/10

US Classification:

21913033

Abstract:

An operating system is provided for an electric arc welder including a high switching speed inverter power source for creating an arc voltage and arc current between an electrode and a workpiece. This operating system regulating the arc voltage to provide a voltage with a slope by using an error circuit to create an error output and having a first input with a signal representing the set voltage and a second input representing the sum of the actual arc voltage and the actual arc current multiplied by a slope constant. A DSP program reduces the error output by adjusting the voltage output of the inverter power source to change the actual arc voltage. The slope constant is in the range of 0–10%.

US Patent:

7495193, Feb 24, 2009

Filed:

Mar 15, 2005

Appl. No.:

11/081059

Inventors:

Russ K. Myers - Hudson OH, US
Timothy M. O'Donnell - Chesterland OH, US
Timothy P. Rosiek - Mentor OH, US

Assignee:

Lincoln Global, Inc. - City of Industry CA

International Classification:

B23K 9/10

US Classification:

21913051, 219137 R, 219137 PS, 219 54, 219 602, 219 61, 219 60 A

Abstract:

Welders and methods are presented for short-circuit arc welding a workpiece using a modified series arc welding configuration with two electrodes via a sequence of welding cycles, in which each cycle includes an arc condition a short-circuit condition, wherein one or both electrode currents are selectively reversed during a reverse boost portion of the welding cycle to transfer molten metal from the second electrode to the first electrode prior to a short-circuit condition of a subsequent welding cycle.

US Patent:

7505689, Mar 17, 2009

Filed:

Jan 27, 2005

Appl. No.:

11/044821

Inventors:

Robert C. Guyer - Beverly MA, US
Tate J. Keegan - Goffstown NH, US
Kevin A. LaRochelle - Goffstown NH, US
Timothy J. O'Donnell - Bedford NH, US
Joseph M. Schlupf - Newburyport MA, US
Heather L. Keegan - Goffstown NH, US

Assignee:

BAE Systems Information and Electronic Systems Integration Inc. - Nashua NH

International Classification:

H04B 10/00

US Classification:

398138, 398 41, 398135, 398136, 398128

Abstract:

A transceiver system allows for simultaneous operation of transmit and receive modes, even in shared path configurations, by temporarily making the receiver insensitive to transmitter energy and by modifying standard readout technology to rapidly dissipate any transmitter energy deposited onto the receiver's detector elements. The entirely electronic technique alerts the receiver to the imminent emission of each transmitter pulse. This alert opens a gate voltage switch in the readout and prevents energy that is present on the detector from being passed to the readout integrator. As soon as the transmitter pulse has passed and any charges it generated on the detector have been dissipated, the switch is automatically closed and the receiver is again fully active. Since this on/off switching happens automatically and rapidly it can operate independently from, and have very little impact on the receiver. Furthermore, it levies absolutely no limitations whatsoever on the operation of the transmitter.

US Patent:

7573002, Aug 11, 2009

Filed:

Jul 10, 2006

Appl. No.:

11/483899

Inventors:

Russell K. Myers - Hudson OH, US
William S. Houston - Avon OH, US
Timothy M. O'Donnell - Chesterland OH, US
Robert Hasan - Euclid OH, US

Assignee:

Lincoln Global, Inc. - Monterey Park CA

International Classification:

B23K 9/10

US Classification:

21913771

Abstract:

Electric arc welder () performs a given weld process with selected current waveform performed between electrode () and workpiece (). Welder () includes a controller with a digital processor (), sensor () for reading instantaneous weld current, and circuit () to convert the instantaneous current into a digital representation of the level of instantaneous weld current. Digital processor () has program circuit () to periodically read and square the digital representation at a given rate, register () for summing a number N of square digital representations to give a summed value, and an algorithm () for periodically dividing the summed value by the number N to provide a quotient and then taking the square root of said quotient to thereby digitally construct rms signal () representing the root mean square of the weld current.

US Patent:

8519302, Aug 27, 2013

Filed:

Aug 21, 2006

Appl. No.:

11/465999

Inventors:

Russell K. Myers - Hudson OH, US
Timothy M. O'Donnell - Chesterland OH, US
Alonzo P. O. Yost - North Canton OH, US

Assignee:

Lincoln Global, Inc. - City of Industry CA

International Classification:

B23K 9/10

US Classification:

21913051, 219137 R, 219137 PS, 219 602, 219 61, 219 60 A

Abstract:

An electric arc welder for depositing weld metal along a groove between two edges of a metal workpiece where the welder comprises a first electrode driven by a first wire feeder toward a point in said groove, a second electrode driven by a second wire feeder toward the point and a main power source with a first output terminal connected to the first electrode and a second output terminal connected both to the second electrode and directly or indirectly to the metal workpiece to create a second electrode path and a workpiece path. The power source includes a high speed switching output stage for creating current with a selected AC waveform between the first and second output terminals where the waveform of the main power source is generated by a waveform generator controlling a pulse width modulator circuit to determine the current operation of the output stage.