Clarence B Johnson

US Patent:

61779970, Jan 23, 2001

Filed:

Aug 19, 1999

Appl. No.:

9/376000

Inventors:

Kenneth A. Blumenstock - College Park MD
Claef F. Hakun - Dunkirk MD
Clarence S. Johnson - West River MD

Assignee:

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

International Classification:

G01B 1114

US Classification:

356375

Abstract:

The present invention is an optical sensor that senses the movement of a shaft. Detection of radial movement is made when a portion of light incident on the shaft sensor-target is blocked. For detection of axial movement, a disk with flat surface is mounted and used to block a portion of light. The variation in the amount of light allowed to pass through is a measure of the position of the shaft. As proposed by this invention, significant improvement is made with respect to sensitivity and linearity of the system when the light is permanently partially blocked. To accomplish this goal this invention adds a boss to the system. To eliminate possible drift of system performance due to LED degradation or temperature variation, a feedback feature is added to the system.

US Patent:

39855171, Oct 12, 1976

Filed:

Aug 20, 1975

Appl. No.:

5/606258

Inventors:

Clarence A. Johnson - Princeton NJ

Assignee:

Hydrocarbon Research, Inc. - Morristown NJ

International Classification:

C10L 900
F26B 308

US Classification:

44 1R

Abstract:

Low rank coals such as subbituminous or lignites containing more than about 10 weight percent moisture are dried and passivated against reabsorption of moisture in a fluidized bed by heating the particulate coal with a warm inert gas passing upwardly through the bed and simultaneously coating the warm particulate coal with a heavy liquid hydrocarbon material. Such coating aids in the removal of the moisture and prevents the reabsorption of moisture by the coal and thereby prevents consequential heating and possibly spontaneous ignition of the coal during its subsequent transportation or storage.

US Patent:

40999335, Jul 11, 1978

Filed:

Jun 10, 1975

Appl. No.:

5/585696

Inventors:

Clarence A. Johnson - Princeton NJ
John Shen - Gaithersburg MD

Assignee:

Hydrocarbon Research, Inc. - Lawrenceville NJ

International Classification:

C10J 354

US Classification:

48202

Abstract:

The gasification of coal to produce a methane-rich product gas is accomplished through the controlled slow heating of particulate coal in a gasifier comprising two or more zones, whereby any significant decrease in the density of the coal particles is minimized and particle swelling and friability are significantly reduced, while the carryover of fines and deposition of tars in the product gas conduit are thereby minimized. The particulate coal heating rate in the gasifier zones is usually between about 10. degree. and 200. degree. F per minute. When the particulate coal is to be fed to the gasifier at elevated temperature, further improvements are achieved with swelling type caking coals through their pretreatment by preheating the coal at a slow rate between 10. degree. and 100. degree. F per minute up to about 800. degree. F in multiple fluidized beds.

US Patent:

39855163, Oct 12, 1976

Filed:

Aug 20, 1975

Appl. No.:

5/606256

Inventors:

Clarence A. Johnson - Princeton NJ
William Volk - Princeton NJ

Assignee:

Hydrocarbon Research, Inc. - Morristown NJ

International Classification:

C10L 900
F26B 308

US Classification:

44 1R

Abstract:

Low rank coals such as subbituminous or lignites containing more than about 10 wt. % moisture are first dried and then passed to a fluidized bed where the coal is passivated against reabsorption of moisture by coating the warm coal particles with a heavy liquid hydrocarbon material. Such coating substantially prevents the reabsorption of moisture in the coal, and thereby prevents autogenous heating and possible spontaneous ignition during subsequent transportation or storage of the passivated coal.

Author:

Clarence Shole Johnson

ISBN #:

0415940737

Author:

Clarence Shole Johnson

ISBN #:

0415940745

Author:

Clarence R. Johnson

ISBN #:

0404164560

Author:

Clarence Johnson

ISBN #:

0618543368

Author:

Clarence Johnson

ISBN #:

0741427818

Author:

Clarence D. Johnson

ISBN #:

0520091329

Author:

Clarence D. Johnson

ISBN #:

0891082492

Author:

Clarence D. Johnson

ISBN #:

0891083030