David Lawrence Dummer

US Patent:

6828773, Dec 7, 2004

Filed:

Mar 21, 2002

Appl. No.:

10/103392

Inventors:

Jonathan Ernest Buczkowski - Aurora CO
David Lawrence Dummer - Fort Collins CO
Julie L Stahmer - Fort Collins CO
Brent W Thordarson - Ft Collins CO

Assignee:

Agilent Technologies, Inc. - Palo Alto CA

International Classification:

G01R 3126

US Classification:

3241581, 324765

Abstract:

A fixture assembly is presented. The fixture assembly includes a device assembly for mating with a device under test and a tester interface assembly for mating with the device assembly on one side and a tester on a second side. In the method and apparatus of the present invention, the device assembly includes a probe field specific to a device under test and may be changed to accommodate a different device, without changing the tester interface assembly. The tester interface assembly includes a frame used for alignment and structural support. The frame interfaces with a probe plate on one side and a load plate on the other side. The probe plate holds a plurality of probes in place while the load plate provides a plurality of holes for the probes to extend downward through the load plate. A printed circuit board (PCB) is positioned below the load plate and makes contact with the ends of the probes. The entire tester interface assembly is positioned on top of an electronic tester and maps points of contact in the tester with the probe field of the device assembly.

US Patent:

59670126, Oct 19, 1999

Filed:

Nov 19, 1996

Appl. No.:

8/753051

Inventors:

David L. Dummer - Longmont CO
Jack L. McCrea - Pittsburgh PA
Roy Jay Maloney - West Mifflin PA

Assignee:

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

International Classification:

B67B 748
B67B 752

US Classification:

83451

Abstract:

The invention features implementation of a flat triangular blade which has wo cutting edges and a sharp point. The blade is caused to move pointwise across a cylindrical can's diameter, with the plane of the blade perpendicular to the can's axis, so that the point pierces the can, the two cutting edges slice through the can in both directions around the can's circumference, and the point again, diametrically oppositely, pierces the can. The inventive removal of the residual contents and propellants from a spent aerosol can is optimally effective, because the invention divides the can into two separate parts, concomitantly subdividing the can's internal components.