Thomas E Griffith

US Patent:

20020031104, Mar 14, 2002

Filed:

Jun 19, 2001

Appl. No.:

09/883347

Inventors:

Thomas Griffith - Fairfax VA, US
Stefen Van Rafelghem - Centerville VA, US
Stephen Russell - Fairfax VA, US
Ronald Hirsch - Fairfax VA, US

Assignee:

AVTEC SYSTEMS, INC. - Fairfax VA

International Classification:

H04Q007/00

US Classification:

370/329000, 370/352000

Abstract:

Methods and systems are provided to manage communications in networks having wired and wireless portions. By determining the optimum segment size for a wireless link based on various status conditions such as bit-error rates, data throughput across the wireless link can be improved. Accordingly, data received from a wired network can be repackaged using the desired segment size before being transmitted over the wireless link. Similarly, optimum-sized segments can be received from the wireless link and the data in the received segments can be passed to the wired network.

US Patent:

20020065064, May 30, 2002

Filed:

Sep 6, 2001

Appl. No.:

09/946614

Inventors:

Thomas Griffith - Fairfax VA, US
Stefan Rafelghem - Fairfax VA, US
Stephen Russell - Fairfax VA, US
Ronald Hirsch - Fairfax VA, US

Assignee:

AVTEC SYSTEMS, INC. - Fairfax VA

International Classification:

H04M011/00

US Classification:

455/405000

Abstract:

The present invention provides a first gateway that can receive, buffer and acknowledge a number of files from a data terminal. The gateway can then transmit one or more first segments derived from the received files to a wireless device over a first wireless link. In the event that the first wireless link is broken, any data not received by the wireless device by the first gateway can be provided to a second gateway. The second gateway, in turn, can provide the remaining data to the wireless device using one or more second segments without requiring that the second gateway contact the data terminal.

US Patent:

20020080774, Jun 27, 2002

Filed:

Aug 16, 2001

Appl. No.:

09/930288

Inventors:

Thomas Griffith - Fairfax VA, US
Stefan Rafelghem - Fairfax VA, US
Stephen Russell - Fairfax VA, US
Ronald Hirsch - Fairfax VA, US

Assignee:

AVTEC SYSTEMS, INC. - Fairfax VA

International Classification:

H04L012/66

US Classification:

370/352000, 370/401000

Abstract:

Methods and systems are provided to manage communications in networks having wired and wireless portions. By determining the optimum segment size for a wireless link based on various status conditions such as bit-error rates, data throughput across the wireless link can be improved. Accordingly, data received from a wired network can be repackaged using the desired segment size before being transmitted over the wireless link. Similarly, optimum-sized segments can be received from the wireless link and the data in the received segments can be passed to the wired network.

US Patent:

60507780, Apr 18, 2000

Filed:

Sep 24, 1998

Appl. No.:

9/160449

Inventors:

Francis H. McArdle - Norristown PA
Thomas W. Griffith - The Villages FL
George H. Thompson - Gloucester NJ
John H. Peck - Boothwyn PA
Helene G. McArdle - Norristown PA

Assignee:

The Boeing Company - Seattle WA

International Classification:

B64C 2751

US Classification:

416107

Abstract:

A semi-articulated stiff-in-plane (SASTIP) rotor hub is provided. The hub includes a cylindrical composite shell (12). A plurality of flexure mount assemblies (16) are positioned around the periphery of the hub shell. Each flexure mount assembly includes both an upper and a lower flexure (64), (66). The outboard ends of the upper and lower flexures attach to an outboard bearing support (34). The inboard end of each flexure is maintained within first and second clamp plates (76), (78) that are mounted within hub flexure openings (38), (40). The flexure clamp plates (76), (78) additionally attach circumferentially to annular CF rings (24), (26), (28), (30) positioned within the hub shell. A blade shaft (14) extends through the outboard bearing (72) and connects to a spindle. The spindle is supported by a spherical bearing that is mounted within the hub shell (12) at a circular spindle hole.

US Patent:

41423275, Mar 6, 1979

Filed:

Aug 2, 1977

Appl. No.:

5/821104

Inventors:

Thomas Griffith - West Chester PA
Richard Campbell - Newtown Square PA

Assignee:

The Boeing Company - Seattle WA

International Classification:

E05D 1510

US Classification:

49215

Abstract:

What follows is a description of a three track mechanism assembly for a vehicle door, and in particular for a light rail vehicle door. Each track mechanism includes a guide rail for guiding the door in its opening and closing movement relative to the vehicle body. Two of the track mechanisms include actuators for producing the opening and closing movement of the door. One of these actuators produces the desired longitudinal displacement of the door relative to the vehicle body, while the other actuator produces the desired transverse displacement of the door relative to the vehicle body. In addition, an extraction device can be included with the track mechanism having the actuator producing the desired longitudinal displacement for assisting the other actuator in producing the desired transverse displacement of the door relative to the vehicle body. The same two track mechanisms which include the noted actuators also serve to transfer the door weight to the vehicle body, each transferring a part of the door weight.