David M Scruggs

US Patent:

42041422, May 20, 1980

Filed:

Dec 27, 1977

Appl. No.:

5/864371

Inventors:

David M. Scruggs - San Juan Capistrano CA

International Classification:

H02K 1100

US Classification:

318257

Abstract:

An improved hoist control system wherein a D. C. motor is employed to drive the hoist, and a remote hand-held control is utilized to vary the motor speed and direction of rotation. The hand control comprises an A. C. to D. C. variable transformer which is controllable by a trigger mechanism, a three-pole double throw switch for up-off-down control of the motor, circuit on-off switches, a meter for reading the hoist load, and an interlock device for limiting the actuation of the motor control switch if the trigger is depressed.

US Patent:

44847505, Nov 27, 1984

Filed:

Nov 3, 1983

Appl. No.:

6/548542

Inventors:

David M. Scruggs - San Juan Capistrano CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

F16J 900
F16K 4100
F16L 5300
F16L 1300

US Classification:

277 9

Abstract:

A joint includes two members with facing surface sections sealed together by a meltable seal material contained within a reservoir between the surface sections. A non-capillary recess in one of the members adjacent one surface section keeps the seal material from flowing out of the reservoir between the members by capillary action when the seal material is melted to form or reform the seal between the members.

US Patent:

47255129, Feb 16, 1988

Filed:

Jun 8, 1984

Appl. No.:

6/618885

Inventors:

David M. Scruggs - San Juan Capistrano CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

B05D 306
B32B 1500
C25D 510

US Classification:

428678

Abstract:

A process for protecting an article from wear, wherein a frictionally transformable material is provided at the surface of the article, and then the surface of the article is subjected to frictional wear. The wear transforms the outermost layer of the material to the amorphous state, which is more wear resistant and corrosion resistant than is the material in its nonamorphous state. As the material is worn away gradually, the frictional transformation continues, thereby replenishing the amorphous outermost layer, so that a protective outermost layer remains. A particularly satisfactory frictionally transformable material consists essentially of from about 40 to about 75 weight percent of a first component selected from the group consisting of iron, cobalt, and combinations thereof; more than about 20 weight percent of a second component selected from the group consisting of chromium, molybdenum, tungsten, niobium, vanadium, and combinations of chromium, molybdenum, tungsten, niobium, vanadium, and titanium; and from about 2 to about 6 weight percent of a third component selected from the group consisting of boron, carbon, and combinations thereof.

US Patent:

46083197, Aug 26, 1986

Filed:

Sep 10, 1984

Appl. No.:

6/649070

Inventors:

Gerald A. Croopnick - Trabuco Cyn CA
David M. Scruggs - San Juan Capistrano CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

C22F 100
C21D 900
C23F 100
B01J 3200

US Classification:

428613

Abstract:

An extended surface area amorphous metallic article and process for preparation thereof, wherein a homogeneous amorphous metallic alloy is phase-separated to produce two interconnected, internally continuous, amorphous phases, and then one phase is removed. Preferably, the homogeneous metallic alloy has a composition associated with a eutectic between at least two solid solutions. Phase separation is accomplished by exposing the alloy to a temperature which is below the crystallization temperature and also below the phase separation temperature for that composition. Removal of one phase may be accomplished by leaching in a liquid solution, or by vaporization. The resulting article has an extended surface area of the amorphous phase that is not removed. A porous membrane having extended internal surface area may be prepared by continuing the removal process to the removal of one phase throughout the entire thickness of the article. The extended surface area articles, wherein the extended surface area is of an amorphous metal, enjoy particular advantages when used as catalysts.

US Patent:

47435135, May 10, 1988

Filed:

Jun 10, 1983

Appl. No.:

6/503174

Inventors:

David M. Scruggs - San Juan Capistrano CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

B32B 1518
B32B 1500

US Classification:

428668

Abstract:

Wear-resistant materials and articles, wherein an amorphous material having a hardness of greater than about 1600 VHN is utilized to protect wear-susceptible portions of substrates or is itself made into a wear-resistant article. Amorphous materials having hardnesses greater than about 1600 VHN are found to have surprisingly great wear resistance and can be used to prepare wear-resistant articles. Particularly satisfactory results have been obtained with metal-metalloid systems such as W--Ru--B, Re--Mo--B, Mo--Ru--B, and Co--Nb--B materials.

US Patent:

45296685, Jul 16, 1985

Filed:

May 22, 1984

Appl. No.:

6/612860

Inventors:

Gerald A. Croopnick - Trabuco Canyon CA
David M. Scruggs - San Juan Capistrano CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

C25D 356

US Classification:

428665

Abstract:

An electrodeposition process for depositing a boron-containing amorphous metallic layer onto a cathode from an electrodeposition bath having borophosphoric acid, dimethylamineborane or diethylamineborane; an ammonium salt of a hydroxycarboxylic acid or amino acid; and a source of the metallic ions. In one embodiment, tungsten-cobalt-boron amorphous alloys are deposited onto the cathode from a bath having borophosphoric acid, an ammonium salt of a hydroxycarboxylic acid or amino acid, a tungsten-containing salt and a cobalt-containing salt. In the preferred embodiment, the tungsten-containing salt is sodium tungstate, the cobalt-containing salt is cobalt sulphate, and the ammonium salt of a hydroxycarboxylic acid is ammonium citrate or ammonium tartrate. A range of bath compositions may be utilized to deposit the amorphous tungsten-cobalt-boron alloys onto the cathode, such alloys having high hardness and wear resistance and also having sufficient ductility to avoid cracking of the amorphous layer in fabrication and use. The electrodeposition process is preferably conducted at a voltage greater than the hydrogen over-voltage of the bath composition, and at a current density greater than about 20 milliamps per square centimeter.

US Patent:

46488200, Mar 10, 1987

Filed:

Nov 14, 1985

Appl. No.:

6/797925

Inventors:

David M. Scruggs - San Juan Capistrano CA
Eric N. Mickelson - Mission Viejo CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

B22F 910

US Classification:

425 8

Abstract:

Apparatus for continuous preparation of rapidly cooled metal particles from a molten source metal by quenching into a quench liquid, wherein a cylindrical quench chamber rotates about its axis to hold the quench liquid against the inner wall thereof under centrifugal force, and a spinner disk within the quench chamber rotates about the same axis to spin off molten metal droplets into the quench liquid. Quench liquid is supplied at one end of the quench chamber and removed at the other end continuously, at the same time drawing off the solidified metal particles to an external recirculation loop where the particles are separated from the quench liquid. The spinner disk has an upper surface including a generally conical protruding tip. Metal from a source metal supply tube is directed downwardly onto the apex of the tip to form a laminar flow along the upper surface of the spinner disk. Droplets are formed near the outer periphery of the spinner disk as the liquid source metal is thrown off the disk, so that the time between formation of the liquid drops and their impingement on the wall of quench liquid is very brief.

US Patent:

50305190, Jul 9, 1991

Filed:

Apr 24, 1990

Appl. No.:

7/513762

Inventors:

David M. Scruggs - San Juan Capistrano CA
Gerald A. Croopnick - Trabuco Canyon CA

Assignee:

Amorphous Metals Technologies, Inc. - Irvine CA

International Classification:

C22C 100
C22C 3200

US Classification:

428614

Abstract:

A matrix-bonded carbide-containing material of high hardness is prepared using a mixture containing a matrix alloy having a composition in weight percent of from about 15 to about 45 percent chromium, from 0 to about 3 percent silicon, from about 2 to about 6 percent boron, from about 3 to about 11 percent titanium (either as metal or as a compound), balance iron and impurities, and a mass of tungsten carbide particles, the tungsten carbide particles preferably being present in an amount of from about 15 to about 60 percent by weight of the total mixture and the matrix alloy preferably being present in an amount of from about 85 to about 40 percent by weight of the total mixture. The matrix alloy is melted to produce a flowable mixture having a liquid phase and solid tungsten carbide particles, and thereafter solidified. During melting, the tungsten carbide particle size is reduced by interaction with the liquid phase. The melting can be accomplished by a conventional melt casting procedure, or by welding or other technique that produces a liquid matrix phase.