Gary L Nelson

US Patent:

51933659, Mar 16, 1993

Filed:

Sep 26, 1991

Appl. No.:

7/765985

Inventors:

Gary T. Nelson - Oregon City OR

International Classification:

E05B 7500

US Classification:

70 16

Abstract:

As an alernative to incarceration or supervised parole/probation, and following the burgeoning home detention philsophy, the penalty device would provide a humane, relatively inexpensive, court directed, rehabilitative/monitoring measure for non-violent criminal offenders. The device would consist of a rigid sleeve of heavy gauge plastic or metal which is locked in place around a criminal offender's forearm by a locking mechanism. The penalty device would be a court ordered stipulation or unsupervised parole or probation. The device would not only constitute appropriate requital for many offenses, but would additionally serve to identify certain offenders to law enforcement personnel and the public in general.

US Patent:

51343371, Jul 28, 1992

Filed:

Jul 5, 1991

Appl. No.:

7/726139

Inventors:

Keith F. Kongslie - Beaverton OR
Gary A. Nelson - Portland OR
Duncan F. Hughes - Woodlyn PA

Assignee:

Tektronix, Inc. - Wilsonville OR

International Classification:

H01J 2956
H01J 2962
H01J 4302

US Classification:

313400

Abstract:

A projection lens assembly (10) projects onto a display screen (38) electrons emitted from an output side (86) of an electron multiplier such as, for example, a microchannel plate (70). The projection lens assembly includes a dome-shaped mesh element (16) that is concave as viewed from the display screen. The mesh element is positioned between the microchannel plate and a filter element (20) having a beam-limiting aperture (22). The mesh element is of an aspherical shape that allows the projection lens assembly to project the electrons toward the display screen with substantially no spherical aberration, thereby forming near the beam-limiting aperture an electron beam crossover of small diameter. The beam-limiting aperture is formed with a relatively small diameter that allows the filter element to block electrons of energies outside a preselected range of energy values, thereby reducing chromatic aberration in the image formed on the display screen.