Jerry Thomas Perdue

US Patent:

6536095, Mar 25, 2003

Filed:

Feb 9, 2001

Appl. No.:

09/779475

Inventors:

Jerry Thomas Perdue - Christiansburg VA

Assignee:

Litton Systems, Inc. - Los Angeles CA

International Classification:

H02K 1502

US Classification:

29597, 29596, 310232, 150245

Abstract:

The present invention advantageously provides a cost effective flat rotor for a pancake type slip ring. A flat copper coil sheet is stamped into a corrugated shape having concentric V-ring grooves. The corrugated stamped copper foil sheet is bonded using a bonding agent to a dielectric layer. Multiple concentric V-grooves are formed by separating the grooves, for example, by machining the grooves at an apex thereof in order to form separate electrical circuits. A corresponding plurality of holes extend through each concentric ring and through the dielectric layer from the first side through the second side. A conductive material is placed in each of the plurality of holes to electrically connect each concentric ring to the second side.

US Patent:

7105983, Sep 12, 2006

Filed:

Jun 18, 2004

Appl. No.:

10/871090

Inventors:

Michael J. Day - Blacksburg VA, US
Norris E. Lewis - Christiansburg VA, US
Jerry T. Perdue - Christiansburg VA, US
Larry D. Vaught - Pembroke VA, US
Hettie H. Webb - Radford VA, US
Barry K. Witherspoon - Blacksburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02K 39/08

US Classification:

310323, 310238

Abstract:

The present invention provides several improvements in a slip ring () that is adapted to provide electrical contact between a rotor () and stator (). In one aspect, a brush tube () is crimped around the upper marginal end portions of a plurality of individual fibers () inserted therein. In another aspect, a collimator tube () extends downwardly beyond the end of the brush tube to limit lateral movement of the fibers in the bundle when the rotor rotates. In yet another arrangement, a spring () is arranged to bear against a current-carrying conductor to adjustably vary the force by which the lower ends of the fibers are urged to move toward the rotor.

US Patent:

7142747, Nov 28, 2006

Filed:

Sep 8, 2003

Appl. No.:

10/657403

Inventors:

Martin J. Oosterhuis - Blacksburg VA, US
Jerry T. Perdue - Christiansburg VA, US
Carlton W. Sutphin - Christiansburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

G02B 6/34
G02B 6/36

US Classification:

385 26, 385 36

Abstract:

A fiber optic rotary joint is provided that is unaffected by variations in the optical properties of a fluid that fills its internal cavity. The rotary joint includes a housing defining the internal cavity, first and second optical collimation arrays on opposite sides of the internal cavity, and a reversion prism between the optical collimation arrays. Further, the rotary joint includes an interface optical element proximate at least one of the first and second optical collimation arrays and the reversion prism. Each interface optical element includes an optically-flat surface adapted to contact the fluid such that optical signals that are oriented normal to the optically-flat surface can be transmitted without refraction, thereby rendering the optical signals immune to variations in the fluid's optical properties. A reversion prism assembly, an optical collimation assembly and a method of aligning an optical collimation array utilizing alignment pins are also provided.

US Patent:

7239776, Jul 3, 2007

Filed:

Mar 29, 2006

Appl. No.:

11/392283

Inventors:

Martin J. Oosterhuis - Blacksburg VA, US
Jerry T. Perdue - Christiansburg VA, US
Carlton W. Sutphin - Christiansburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

G02B 6/26

US Classification:

385 25, 385 26, 385 36, 385 39, 385 88, 385 89

Abstract:

A fiber optic rotary joint is provided that is unaffected by variations in the optical properties of a fluid that fills its internal cavity. The rotary joint includes a housing defining the internal cavity, first and second optical collimation arrays on opposite sides of the internal cavity, and a reversion prism between the optical collimation arrays. Further, the rotary joint includes an interface optical element proximate at least one of the first and second optical collimation arrays and the reversion prism. Each interface optical element includes an optically-flat surface adapted to contact the fluid such that optical signals that are oriented normal to the optically-flat surface can be transmitted without refraction, thereby rendering the optical signals immune to variations in the fluid's optical properties. A reversion prism assembly, an optical collimation assembly and a method of aligning an optical collimation array utilizing alignment pins are also provided.

US Patent:

7339302, Mar 4, 2008

Filed:

Jun 6, 2006

Appl. No.:

11/447629

Inventors:

Norris E. Lewis - Christiansburg VA, US
Jerry T. Perdue - Christiansburg VA, US
Larry D. Vaught - Pembroke VA, US
Hettie H. Webb - Radford VA, US
Barry K. Witherspoon - Blacksburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02K 39/08

US Classification:

310232, 310238, 310247

Abstract:

The present invention provides several improvements in a slip ring () that is adapted to provide electrical contact between a rotor () and stator (). In one aspect, a brush tube () is crimped around the upper marginal end portions of a plurality of individual fibers () inserted therein. In another aspect, a collimator tube () extends downwardly beyond the end of the brush tube to limit lateral movement of the fibers in the bundle when the rotor rotates. In yet another arrangement, a spring () is arranged to bear against a current-carrying conductor to adjustably vary the force by which the lower ends of the fibers are urged to move toward the rotor.

US Patent:

7495366, Feb 24, 2009

Filed:

Sep 11, 2006

Appl. No.:

11/518977

Inventors:

Michael J. Day - Blacksburg VA, US
Norris E. Lewis - Christiansburg VA, US
Jerry T. Perdue - Christiansburg VA, US
Larry D. Vaught - Pembroke VA, US
Hettie H. Webb - Radford VA, US
Barry K. Witherspoon - Blacksburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H02K 41/00

US Classification:

310232, 310233, 310248

Abstract:

A compact slip ring (), which is particularly adapted for use in small spaces, is adapted to provide electrical contact between a rotor () and a stator (). The improved slip ring broadly includes an electrically-conductive monofilament () having one end () mounted on the stator and having a distal end (); a sleeve () mounted on and secured to the marginal end portion of the monofilament, adjacent the distal end; and a fiber bundle () having a longitudinal axis (), one marginal end portion of the fiber bundle being recessed in and secured to the sleeve, the other end of the fiber bundle engaging the rotor such that the longitudinal axis of the fiber bundle will be substantially perpendicular to an imaginary line tangent to the rotor surface at the point of contact with the longitudinal axis.

US Patent:

20140045348, Feb 13, 2014

Filed:

Mar 13, 2012

Appl. No.:

14/113632

Inventors:

Norris E. Lewis - Christiansburg VA, US
Jerry T. Perdue - Christiansburg VA, US

Assignee:

Moog Inc. - East Aurora NY

International Classification:

H01R 39/24

US Classification:

439 18

Abstract:

The present invention broadly provides improvements in a slip-ring adapted to provide electrical contact between a stator and a rotor. The improved slip-ring includes a brush assembly having a brush tube mounted on the stator and having a fiber bundle composed of a number of individual fibers. The upper marginal end portions of the fibers are received in the brush tube. The lower marginal end portions of the fibers extend beyond the brush tube toward the rotor. The improvements broadly comprise: a central portion of the fibers having been removed below the brush tube such that the fibers extending below the brush tube toward the rotor are in the form of an annulus; and wherein the tangential compliance of the fiber bundle at its point of contact with the rotor is more than twice the tangential compliance of the fiber bundle if the central portion had not been removed.

US Patent:

50541897, Oct 8, 1991

Filed:

Oct 25, 1990

Appl. No.:

7/603155

Inventors:

Anthony L. Bowman - Blacksburg VA
Norris E. Lewis - Blacksburg VA
Jerry T. Perdue - Blacksburg VA
James M. Wright - Blacksburg VA
Michael J. Day - Blacksburg VA

Assignee:

Litton Systetms, Inc. - Beverly Hills CA

International Classification:

H01R 4304

US Classification:

29597

Abstract:

A method of manufacturing an annular base portion of an electrical slip ring assembly having a plurality of conductive rings formed in the outer circumferential surface thereof is described. The slip ring base is molded, and grooves are machined into the outer circumferential surface thereof. Conductive strips are cut into a series of lengths forming conductive rings to be placed about the outer circumference of the annular base member. The individual lengths of conductive material are anchored to the outer circumferential surface of the slip ring base and a rolling pressure is exerted on them about the circumference of the base to cause the rings to be press fit into the grooves previously formed on the base. When the complete circumference of the ring has been press fit into its respective groove, the other end of the conductive ring is then secured to the base. An appropriate fixture is provided for exerting the lateral and a rolling pressure on each conductive ring to properly press fit it into a groove on the annular base member.