Sean M Gallagher

US Patent:

7042840, May 9, 2006

Filed:

Jun 4, 2001

Appl. No.:

09/873798

Inventors:

Robert Landis Howald - Chalfont PA, US
Sean Gallagher - Wyndmoor PA, US
Ted Booth - Sellersville PA, US

Assignee:

General Instrument Corporation - Horsham PA

International Classification:

H04L 12/26

US Classification:

370229, 370506

Abstract:

A method and apparatus for digitizing multiple data streams having different clocks spreads an error due to clock drift is spread across many clock cycles in extremely small amounts. To combine two data streams, the method interpolates one or more samples between existing samples of one of the two data streams and then adjusts a number of samples of said one of the two data streams to maintain balance in a downstream synchronizing buffer. This occurs prior to combining the two data streams. The adjusting may be performed by adding or decimating samples from the interpolated samples. To combine two asynchronous data streams having clocks offset in frequency, first, a first data stream is clocked into and out of a first buffer using a first clock associated with the first data stream. Second, a second data stream is clocked into a second buffer using a second clock associated with the second data stream and clocking the second data stream out of the second buffer using the first clock. Third, samples are interpolated into and decimated from samples of the second data stream prior to clocking the second data stream into the second buffer based on an overflow or underflow of the second buffer.

US Patent:

7556471, Jul 7, 2009

Filed:

Sep 18, 2006

Appl. No.:

11/527666

Inventors:

Sean M. Gallagher - Philadelphia PA, US
Stuart G. Ullman - Kensington MD, US
Ryan T. Hayleck - Fulton MD, US
Christopher J. Doyle - Panama City Beach FL, US
John F. O'Dea - Laurel MD, US
Robert W. Anderson - Alexandria VA, US
Kellie L. Redcay - Pottstown PA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B63B 27/00
B63B 35/00

US Classification:

414803, 4141395

Abstract:

The present invention's vehicle, suitable for being hoisted while carrying people between destinations, is compactable and de-compactable. As typically embodied, the vehicle includes a box-shaped open frame, plural chairs, and a shock-absorbent base. The frame includes a rectangular floor panel, a rectangular ceiling panel, and four posts connecting the floor and ceiling panels. Each post is foldable via a medial hinge to half its unfolded length, and is attached in a hinged manner at its opposite ends to respective corner portions of the floor panel and the ceiling panel. Each chair is mounted on the floor panel and can be folded down to a position adjacent to the top surface of the floor panel using hinges variously connecting chair components including a seat, a chair back, two side safety restraints, and a chair support. The shock-absorbent base is solid or inflatable and is attached beneath the floor panel.