Timothy M Edwards

Author:

Timothy Edwards

ISBN #:

0890064709

US Patent:

48501336, Jul 25, 1989

Filed:

Dec 29, 1988

Appl. No.:

7/291507

Inventors:

Louis Burzdak - Los Angeles CA
Timothy D. Edwards - Los Angeles CA

International Classification:

A01M 304

US Classification:

43136

Abstract:

An ecology bug catcher for efficiently trapping a bug without killing it includes a hollow tube with a first end and a second end, a catching mechanism for catching a bug, an ejecting mechanism and a triggering mechanism. The catching mechanism has a first position in which it is resiliently biased so that it is normally closed and a second position in which it is held open. The catching mechanism is slidably coupled into the hollow tube at the first end so that the hollow tube holds it in the second position until the catching mechanism is ejected from the hollow tube and returns to the first position. The ejecting mechanism ejects the catching mechanism from the hollow tube. The triggering mechanism releases the catching mechanism. The ejecting mechanism includes a plug, a spring and a connector and ejects the catching mechanism in order to catch a bug. The plug is mechanically coupled to the hollow tube adjacent to the second end.

US Patent:

44589778, Jul 10, 1984

Filed:

Jun 1, 1981

Appl. No.:

6/269104

Inventors:

James A. Arns - Culver City CA
Timothy J. Edwards - Hermosa Beach CA
Gaylord E. Moss - Marina del Rey CA
John E. Wreede - Monrovia CA

Assignee:

Hughes Aircraft Company - El Segundo CA

International Classification:

G03H 104

US Classification:

350 36

Abstract:

A hologram forming system for forming, from a single beam source and a reflective mirror, a reflective hologram in which spurious reflection and transmission hologram recordings are eliminated. Reflected rays are changed in phase relative to the primary beams during the recording period so that spurious holograms do not form. The remaining effect of the reflected rays is to slightly change the overall refractive index of a phase recording material (such as dichromated gelatin) with a resultant slight loss of available index of modulation or to slightly, uniformly, darken an amplitude hologram film, (such as silver halide) with a slight loss of available contrast. The invention includes hologram forming systems that move the cover plate relative to a fixed recording medium with and without a phase shifter in the primary beam and a hologram forming system that moves the substrate and mirror relative to the fixed cover plate.

US Patent:

44563280, Jun 26, 1984

Filed:

Jun 1, 1981

Appl. No.:

6/269105

Inventors:

James A. Arns - Culver City CA
Timothy J. Edwards - Hermosa Beach CA
Gaylord E. Moss - Marina del Rey CA
John E. Wreede - Monrovia CA

Assignee:

Hughes Aircraft Company - El Segundo CA

International Classification:

G03H 102

US Classification:

350 36

Abstract:

The hologram forming systems of the invention form diffusion type holograms in which undesired spurious transmission hologram recordings are eliminated. The reflecting surfaces are moved during the recording process so that the reflected rays change in phase relative to the primary recording beams and spurious holograms cannot be recorded with sufficient intensity to form undesired reflections in the developed hologram. Thus, pictorial type holograms such as jewelry holograms or art holograms do not present undesired ghost images or flare patterns to the viewer. The concepts of the invention also include formation of diffusion type holograms for high gain directional viewing screens.

US Patent:

44589786, Jul 10, 1984

Filed:

Jun 1, 1981

Appl. No.:

6/269106

Inventors:

James A. Arns - Culver City CA
Timothy J. Edwards - Hermosa Beach CA
Gaylord E. Moss - Marina del Rey CA
John E. Wreede - Monrovia CA

Assignee:

Hughes Aircraft Company - El Segundo CA

International Classification:

G03H 102

US Classification:

350 367

Abstract:

The systems of the invention form improved reflection and transmission holograms utilizing two beams and eliminating all of the higher energy spurious holographic recordings that are caused by reflections of rays from the outer surfaces of the cover plates. The systems provide movement of the cover plate or movement of the substrate and recording medium during the recording period to prevent formation of the spurious recordings. In some arrangements of the invention, global phase shifters are utilized to maintain the phase of the primary rays forming the desired hologram at a high level.