John Douglas Allison

US Patent:

55910572, Jan 7, 1997

Filed:

Sep 14, 1995

Appl. No.:

8/527994

Inventors:

Charles M. Dai - Potomac MD
John L. Allison - Severna Park MD

Assignee:

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

International Classification:

B63H 11113
B63H 11117

US Classification:

440 42

Abstract:

A waterjet propulsion system for a vessel permits stationary mounting of the pump within the vessel hull, and further allows minimizing the size and weight of the pump casing, by providing a pivotably moveable, hull mounted and supported, steering and reversing sleeve mechanism positioned to receive the waterjet flow from a waterjet nozzle and to redirect at least a portion of that flow for steering and production of reverse thrust. The sleeve structure also permits all machinery for achieving control of steering and reverse thrust to be placed in protected locations such as being faired into the sleeve or within the vessel hull. Protection of linkages and reduction of the weight thereof is also provided.

US Patent:

46017950, Jul 22, 1986

Filed:

Mar 27, 1985

Appl. No.:

6/716789

Inventors:

Gerald R. Smith - Columbia MD
John E. Allison - Bowie MD

Assignee:

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

International Classification:

C25D 550
C25D 1500

US Classification:

204 16

Abstract:

A method of coating a metal substrate with a ternary or greater alloy of a redetermined composition is disclosed. Initially, a first and second metals are electrodeposited on the substrate using an aqueous electrolyte. At least one metal powder is simultaneously mixed in the electrolyte as the first and second metals are electrodeposited so that a portion of the metal powder is occluded in the electrodeposited metal coating. The rate of occlusion of the metal powder is controlled by the volume percent of the metal powder in the electrolyte. Finally, the metal coating and substrate are heat treated to diffuse the occluded metal powder in the coating and to form the desired alloy coating. A plurality of metal powders can be mixed in the electrolyte according to the present method. In addition, a diffusion barrier coating can be initially provided on the metal substrate.