David M Whaley

US Patent:

8129910, Mar 6, 2012

Filed:

Jun 23, 2009

Appl. No.:

12/490251

Inventors:

David Riley Whaley - San Carlos CA, US
Ramon Duggal - San Bruno CA, US
Carter Michael Armstrong - Danville CA, US

Assignee:

L-3 Communications Corporation - San Carlos CA

International Classification:

H01J 1/52
H01J 5/02

US Classification:

315 85, 31511121, 31511141, 31511181

Abstract:

A system and method of magnetically insulating the cathode of a cold-cathode electron gun is achieved. A strong magnetic field is applied in the vicinity of the cold cathode to deflect and constrain the flow of electrons emitted from structures within the electron gun. The magnetic field largely prevents re-reflected primary and secondary electrons from reaching the cathode, thereby improving the operation and increasing the life of the cold-cathode electron gun. In addition, the insulating magnetic field improves electron beam focusing and enables a reduction in the magnitude of static electric focusing fields employed in the vicinity of the cold cathode, further reducing the electron gun's susceptibility to destructive arcing.

US Patent:

62048481, Mar 20, 2001

Filed:

Apr 14, 1999

Appl. No.:

9/291344

Inventors:

Steven Nowlan - San Jose CA
Ali Ebrahimi - Belmont CA
David Richard Whaley - Redwood City CA
Pierre Demartines - San Francisco CA
Sreeram Balakrishnan - San Francisco CA
Sheridan Rawlins - Sunnyvale CA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G06F 3023
H03K 1794

US Classification:

345352

Abstract:

A data entry apparatus (10) receives a first character key from a keypad (12). A set of characters associated with the first character key is displayed. A second character key from the keypad (12) is received, wherein a second set of characters is associated with the second character key. A character from the first set of characters is combined with a character from the second set of characters. A set of alternative n-grams is displayed, derived from the step of combining, in descending order based on a probability of frequency of use in a given language. When an alternative n-gram is detected as being actively highlighted, the n-gram is locked to create a locked n-gram and characters associated with subsequent character keys vary in their combinations with respect to the locked n-gram.