Charles T Cooper

US Patent:

7119800, Oct 10, 2006

Filed:

Jun 24, 2003

Appl. No.:

10/603514

Inventors:

Joel C. Kent - Fremont CA, US
Robert Adler - Northbrook IL, US
Charles Dudley Cooper - Harrisburg PA, US

Assignee:

Tyco Electronics Corporation - Middletown PA

International Classification:

G09G 5/00

US Classification:

345177, 178 1804, 178 1902

Abstract:

A touch sensor having an acoustic substrate, an acoustic transducer, and an acoustically diffractive grating is provided. The grating is disposed between the transducer and the substrate, so that acoustic energy from the transducer is coupled to an acoustic wave propagating along the surface of the substrate. If used in a display device, the combination of the transducer and grating may provide a low profile that allows the assembly to be more easily placed between the acoustic substrate and a bezel placed in front of the substrate. No acoustic components need be mounted on the rear surface of the substrate, allowing the acoustic substrate to be formed on the front surface of the display device.

US Patent:

54520690, Sep 19, 1995

Filed:

Oct 15, 1993

Appl. No.:

8/137854

Inventors:

James T. Arnold - Sunnyvale CA
Andrew T. Zander - Cupertino CA
Elbert S. Lile - Portola Valley CA
Charles B. Cooper - Redwood City CA

Assignee:

Varian Associates, Inc. - Palo Alto CA

International Classification:

G01N 100
G01N 2162

US Classification:

356 36

Abstract:

A spark sampling microparticle generator device and method providing means to first ionize a gap and then to switch a stabilized and controllable current into and out of said ionized gap to provide extremely high, selectable current density in a sample material in said gap with very fast rise and fall times to ablate said material to form microparticles. A plurality of identical modular circuits containing high frequency power transistors are selectably switchably connected in parallel simultaneously to the gap to achieve current densities which are higher than achievable with a single transistor, thereby obtaining the benefits of the high frequency response without being limited by the current limitations of the available transistors.