Derrick John Page, 883345 Sansome Cir, Melbourne, FL 32940

7019898, Mar 28, 2006

Sep 18, 2002

10/245634

Derrick John Page - Crownsville MD, US

G03B 21/56
G03F 6/00
A47G 1/06
B29C 47/96
B28B 11/08

359451, 359893, 425150, 425388

A three-dimensional surface shape is produced from input numerical data. The shape of an elastic surface is determined by the positions of a first matrix of memory rods. The position of each of the memory rods is determined by a flexible sheet which is contoured by a second matrix of control rods and is computer-controlled. After control rods transfer the contour data to the memory rods, the control rods are reset to receive new contour data. Both the memory rod and control rod are fitted with two pneumatically controlled locking mechanisms, one for the X-coordinate and one for the Y-coordinate. When both locks on a particular rod are released the rod is free to move to a new position determined by an elevator. Once all of the rods have been adjusted, they are locked in position and the surface has been configured.

2003013, Jul 10, 2003

Jan 9, 2002

10/041986

Derrick Page - Crownsville MD, US

G01B007/00
G01B015/00
G06F015/00

702/155000

A three-dimensional surface shape is produced from input numerical data. The shape of a sheet elastic material is determined by the positions of a matrix of control rods. The position of each of the rods is determined by a computer-controlled system. Each rod is fitted with two pneumatically controlled locking mechanisms, one for the X coordinate and one for the Y coordinate. When both locks on a particular rod are released the rod is free to move to a new position determined by an elevator. Once all of the rods have been adjusted they are locked in position and the surface has been configured. In one application, the surface can be used as a mold for casting a replica or in another application can be used as the screen in an image projection system.

5856805, Jan 5, 1999

Feb 6, 1998

/020112

Derrick J. Page - Crownsville MD

H01Q 322

342375

An array antenna is steered by moving a set of optical filters of different optical lengths between a number of light signal sources and an array antenna elements. By changing the lengths, hence the time delays, of a plurality of the signal paths between the light signal source and the antenna array elements, the wave front can be steered. Each delay path comprises a selected fiber optic line and a fixed electrical delay line. In one embodiment the fiber optical lines assume a parabolic distribution in time delay. In another embodiment, the fiber optical lines assume a cosinusoidal distribution in time delay. Signals are fed to the fiber optic path through a laser diode and exit from the path through a photo-diode. The fiber optic lines are mounted on a rotatable disk, with two ends diametrically located at two different radii. The laser diodes are mounted on a stationary disk and are aligned with one end of the fiber optic line on the rotatable disk, and the photo-diodes are mounted on the same stationary disk and are aligned to the second end of the fiber optic line.

5923291, Jul 13, 1999

Feb 2, 1998

9/017099

Derrick J. Page - Crownsville MD

H01Q 322

342375

An array antenna is steered by moving a set of optical fibers of different optical length between a number of light signal sources and an array of antennas. By changing the lengths of the optical paths of the different light signals sources, the wave front can be steered. The light signal traverses three sections of optical delay lines with at least one selectable optical length. In the first section, light signal from a point source travels through a first optical delay line and a lens to diverge and collimate the light beam with increased cross section. The collimated light beam is focused by second lens and incident one second optical line of selectable optical length. The light beam exiting from the other end of the second optical line is collimated again by a third lens to face a third optical line. The collimated light exiting from the second optical line is focused again by a fourth lens to feed the third optical line, which is connected at the other end to one element of the antenna array. This defocused and focused arrangement allows the steering of the radiation pattern to be continuous and not intermittent.

6204947, Mar 20, 2001

Mar 2, 1998

9/032937

Derrick J Page - Crownsville MD

H04B 1000

359145

An array antenna is steered by moving two sets of optical fibers of different optical lengths between a number of light signal sources and an array antenna. By changing the lengths of the optical paths of the different light signal sources, the wave front can be steered. The light signal traverses five sections of optical delay lines with at least two selectable optical lengths. One set of selectable optical lengths provides coarse adjustment of steering, and a second set of selectable optical lengths provides fine adjustment of steering. The coarse adjustment is implemented by using a larger increment of selectable optical lengths between adjacent optical lengths than the increment for the fine adjustment. The antenna can serve both for a transmitter or a receiver.

5347288, Sep 13, 1994

May 26, 1993

8/067191

Derrick J. Page - Crownsville MD

Westinghouse Electric Corporation - Pittsburgh PA

H01Q 302

342375

A device for delaying signals fed to radiating elements of an array antenna by providing delay paths of selective lengths between respective antenna elements and a signal input source. A plurality of first optical fibers are provided, each having a selected length. A plurality of second optical fibers are also provided, each having a selected length. The first output fibers are alignable to the second fibers to form respective delay paths. At least one of the set of first fibers and set of second fibers is movable relative to the other so that when moved, selected first fibers are aligned with selected second fibers creating a particular delay path of a selected length from the input source to each radiating element.

5558800, Sep 24, 1996

Jun 19, 1995

8/491664

Derrick J. Page - Crownsville MD

Northrop Grumman - Baltimore MD

H05B 672

219761

The output matching networks normally included in a microwave power transistor package as well as the transistor combining network therefor are eliminated for heating applications, e. g. microwave ovens. In a preferred embodiment, the transistor dies of four microwave silicon bipolar power transistors are directly connected to the low impedance points of a common patch type antenna element, also referred to as an applicator, located within the wall of a heating chamber in place of a magnetron. Each pair of power transistors are electrically spaced one half wavelength apart and are located transverse to each other on the antenna. The transistors are operated in pairs with a 180. degree. phase difference so that mutually orthogonal longitudinal modes are excited in the antenna. Moreover, the transistors are frequency modulated over their prescribed frequency band to eliminate standing waves in the load, i. e.

5325102, Jun 28, 1994

Jun 4, 1993

8/073903

Derrick J. Page - Crownsville MD

Westinghouse Electric Corporation - Pittsburgh PA

H01Q 322

342375

A device for delaying signals received from elements of an array antenna by providing delay paths of selectable lengths between respective antenna elements and signal processing means. A plurality of first optical fibers are provided, each having a selected length. A plurality of second optical fibers having selected lengths are also provided. The first fibers are alignable with the second fibers to form respective delay paths. At least one of the set of first fibers and set of second fibers is moveable relative to the other so that when moved, selected first fibers are aligned with selected second fibers creating a delay path of a selected length from each antenna element to the signal processing means.