Steven S Davidson

US Patent:

6480723, Nov 12, 2002

Filed:

Aug 28, 2000

Appl. No.:

09/649205

Inventors:

Steven Frederic Davidson - Skokie IL
Daniel Gerard Maglaya - Bartlett IL
Donald A. Sofia - Sheboygan WI
Stuart John Collar - Algonquin IL
Jeffrey Jay Stone - North Barrington IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04B 138

US Classification:

455557, 455 111, 455 7, 455 9, 455318, 455416, 370277

Abstract:

A communications interface adapter facilitates both wired and wireless communications between crew members of a vehicle having a wired intercom and has an intercom communications circuit having an input/output port for providing electrical communication between the interface adapter and the wired intercom and also has a fixed radio transceiver. The fixed radio transceiver comprises a receive circuit for receiving radio communications and for communicating the received radio communications via the intercom communications circuit to the wired intercom of the vehicle and a transmit circuit for transmitting communications received via the intercom communication circuit from the wired intercom of the vehicle. A crew member is provided wired communications with the wired intercom when the crew members headset is in electrical communication with the wired intercom and is provided wireless communications with the wired intercom via the fixed radio transceiver and the crew members portable radio transceiver when the crew members headset is not in electrical communication with the wired intercom.

US Patent:

D4210026, Feb 22, 2000

Filed:

May 15, 1998

Appl. No.:

D/088163

Inventors:

Steven F. Davidson - Skokie IL
Kim D. Vollendorf - Cary IL
Michael F. DiCicco - Carol Stream IL
David C. Brown - Chicago IL
Christopher C. Gielow - Chicago IL
David J. Cottingham - Wilmette IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

1403

US Classification:

D14137

US Patent:

6223062, Apr 24, 2001

Filed:

May 15, 1998

Appl. No.:

9/079774

Inventors:

Steven Frederic Davidson - Skokie IL
Daniel Gerard Maglaya - Bartlett IL
Donald A. Sofia - Sheboygan WI
Stuart John Collar - Algonquin IL
Jeffrey Jay Stone - North Barrington IL

Assignee:

Northrop Grumann Corporation - Los Angeles CA

International Classification:

H04B 138

US Classification:

455575

Abstract:

A communications interface adapter facilitates both wired and wireless communications between crew members of a vehicle having a wired intercom and has an intercom communications circuit having an input/output port for providing electrical communication between the interface adapter and the wired intercom and also has a fixed radio transceiver. The fixed radio transceiver comprises a receive circuit for receiving radio communications and for communicating the received radio communications via the intercom communications circuit to the wired intercom of the vehicle and a transmit circuit for transmitting communications received via the intercom communication circuit from the wired intercom of the vehicle. A crew member is provided wired communications with the wired intercom when the crew member's headset is in electrical communication with the wired intercom and is provided wireless communications with the wired intercom via the fixed radio transceiver and the crew member's portable radio transceiver when the crew member's headset is not in electrical communication with the wired intercom.

US Patent:

56715307, Sep 30, 1997

Filed:

Oct 30, 1995

Appl. No.:

8/550262

Inventors:

Christopher David Combs - Wheeling IL
Andrew Russell Baker - Kokomo IN
Steven Lee Davidson - Carmel IN
Thomas Rezsonya - Galveston IN

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

H05K 330
H05K 1302
H05K 1304
H05K 1308

US Classification:

29834

Abstract:

A vertical wafer compact flip chip feeder device includes a loading station for providing a loading location where a flip chip wafer having first and second planar surfaces is received such that the first and second planar surfaces are substantially perpendicular to a first plane. The flip chip feeder device further includes a pick-up station for providing a pick-up location where individual flip chips are retrieved from the flip chip wafer. A wafer translating assembly translates the flip chip wafer between the loading and pick-up stations with the first and second planar surfaces of the flip chip wafer remaining substantially perpendicular to the first plane. A chip pick-up assembly retrieves the individual flip chips from the flip chip wafer at the pick-up station and flips the individual flip chips to a flipped position such that first and second planar surfaces of the individual flip chips are substantially parallel with the first plane.

US Patent:

D4191609, Jan 18, 2000

Filed:

May 14, 1998

Appl. No.:

D/088089

Inventors:

Steven F. Davidson - Skokie IL
Kim D. Vollendorf - Cary IL
Michael F. DiCicco - Carol Stream IL
David C. Brown - Chicago IL
Christopher C. Gielow - Chicago IL
David J. Cottingham - Wilmette IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

1403

US Classification:

D14253

US Patent:

20140268948, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/836241

Inventors:

- Windsor Locks CT, US
Mustansir Kheraluwala - Lake Zurich IL, US
Steven A. Davidson - Pecatonica IL, US

Assignee:

HAMILTON SUNDSTRAND CORPORATION - Windsor Locks CT

International Classification:

H02M 7/493
H03K 7/08

US Classification:

363 71, 375238

Abstract:

A power converter system includes an interleaved power converter having a plurality of parallel-connected phase legs between DC terminals and an AC terminal. A plurality of parallel-connected inductors are each connected to one of the plurality of parallel-connected phase legs to provide a summed output of the parallel-connected phase legs to the AC terminal. A controller generates PWM signals used to control the state of each of the plurality of phase legs by comparing a carrier signal to a reference signal, wherein a period of the carrier signal is randomly varied from a nominal period.

US Patent:

20140268967, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/836662

Inventors:

- Windsor Locks CT, US
Mustansir Kheraluwala - Lake Zurich IL, US
Steven A. Davidson - Pecatonica IL, US

Assignee:

HAMILTON SUNDSTRAND CORPORATION - Windsor Locks CT

International Classification:

H02M 7/538

US Classification:

363133

Abstract:

A multi-level power converter system includes a multi-level power converter configured to synthesize at least three direct current (DC) voltages into an alternating current (AC) output voltage, and includes a plurality of transistors. A controller generates pulse-width modulation (PWM) signals used to control a state of the plurality of transistors of the multi-level converter by comparing first and second carrier signals to a reference signals, wherein a period of the first and second carrier signals is randomly varied from a nominal period.