Margaret Ann Darrin

US Patent:

7073749, Jul 11, 2006

Filed:

Jul 16, 2004

Appl. No.:

10/892911

Inventors:

Jerry A. Krill - Ellicott City MD, US
Michael W. Roth - Columbia MD, US
Frederick W. Riedel - Columbia MD, US
Matthew R. Feinstein - Bethesda MD, US
Margaret Ann Darrin - Westminster MD, US
Rafal P. Szczepanowski - Hanover MD, US
Vincent F. Neradka - Bethesda MD, US

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

B64B 1/00

US Classification:

244 2, 244 5, 244 63, 244125, 244126, 89 111, 455431

Abstract:

An airship deployment system comprises an airship of unique shape having laminar flow over this shape to enable low power propulsion, capable remote control, comprising an inflatable body; a propeller assembly for station keeping and repositioning said airship and capable of being folded into a compacted position and unfolded into an operational position; and a payload, comprising gas for inflating said inflatable body; and means for transferring data between said airship and a remote location; and a missile for carrying said airship in a compacted state to a predetermined location and altitude, and releasing said airship at said predetermined location and altitude. When said airship is released from said missile said inflatable body is inflated and said propeller assembly is unfolded into said operational position.

US Patent:

20040150398, Aug 5, 2004

Filed:

Nov 21, 2002

Appl. No.:

10/276983

Inventors:

John Champion - Highland MD, US
Robert Osiander - Ellicott City MD, US
Robert Givens - Frederick MD, US
Dennis Wickenden - Woodbine MD, US
Daniel Jablonski - Bethesda MD, US
Scott Radcliffe - Ellicott City MD, US
Margaret Darrin - Bowie MD, US
Thomas Macher - Columbia MD, US
Douglas Oursler - Columbia MD, US

International Classification:

G01R033/00

US Classification:

324/260000, 324/244000, 324/258000, 331/065000, 073/778000

Abstract:

A Lorentz force-driven mechanical resonator apparatus that utilizes a high-Q resonant structure as both a mixing device and a high-Q bandpass filter. Specifically, an external time varying, but quasistatic, magnetic field is applied to the resonating device while simultaneously running a time varying electrical current through the device. The resulting Lorentz force (I×B) is proportional to the vector product of the electrical current in the bar (I) and the external magnetic field (B). Integrating such a resonant device with a magnetic field coil produces the functionality of an ideal radio frequency (RF) mixer coupled with a high-Q intermediate frequency (IF) filter. Wide tunability provides the capability to scan, or even step, an array of filters having very narrow bandwidths via a common local oscillator to a desired frequency range.