Michael E Read

US Patent:

8547006, Oct 1, 2013

Filed:

Feb 12, 2010

Appl. No.:

12/705160

Inventors:

R. Lawrence Ives - San Mateo CA, US
Hien T. Tran - Cary NC, US
Thuc Bui - Mountain View CA, US
Adam Attarian - Raleigh NC, US
William Tallis - Cary NC, US
John David - Wooster OH, US
Virginia Forstall - Fairfax VA, US
Cynthia Andujar - Cary NC, US
Noah T. Blach - Chapel Hill NC, US
David B. Brown - Raleigh NC, US
Sean E. Gadson - Columbia SC, US
Erin M. Kiley - Loudon NH, US
Michael Read - Plainfield VT, US

Assignee:

Calabazas Creek Research, Inc. - San Mateo CA

International Classification:

H01J 29/02

US Classification:

313414, 313409, 313383, 313389, 313446

Abstract:

A multi-beam electron gun provides a plurality N of cathode assemblies comprising a cathode, anode, and focus electrode, each cathode assembly having a local cathode axis and also a central cathode point defined by the intersection of the local cathode axis with the emitting surface of the cathode. Each cathode is arranged with its central point positioned in a plane orthogonal to a device central axis, with each cathode central point an equal distance from the device axis and with an included angle of 360/N between each cathode central point. The local axis of each cathode has a cathode divergence angle with respect to the central axis which is set such that the diverging magnetic field from a solenoidal coil is less than 5 degrees with respect to the projection of the local cathode axis onto a cathode reference plane formed by the device axis and the central cathode point, and the local axis of each cathode is also set such that the angle formed between the cathode reference plane and the local cathode axis results in minimum spiraling in the path of the electron beams in a homogenous magnetic field region of the solenoidal field generator.

US Patent:

D4133188, Aug 31, 1999

Filed:

Dec 11, 1996

Appl. No.:

D/063617

Inventors:

Michael W. Read - San Francisco CA
Donald E. Ome - Oakland CA
Jim Y. Li - San Francisco CA

Assignee:

Whistle Communications Corporation - Foster City CA

International Classification:

1402

US Classification:

D141146