Raymond J Carroll

Author:

Raymond G. Carroll

ISBN #:

0256075654

Author:

Raymond Albert Carroll

ISBN #:

0853653402

Author:

Raymond F. Carroll

ISBN #:

0256107238

Author:

Raymond Carroll

ISBN #:

0531044807

Author:

Raymond Carroll

ISBN #:

0531045498

Author:

Raymond Carroll

ISBN #:

0531100626

Author:

Raymond Carroll

ISBN #:

0760716609

Author:

Raymond L. Carroll

ISBN #:

0070102988

US Patent:

6338274, Jan 15, 2002

Filed:

May 21, 1999

Appl. No.:

09/316723

Inventors:

Raymond Carroll - Boxford MA

Assignee:

Milli Sensor Systems Actuators, Inc. - West Newton MA

International Classification:

G01P 15125

US Classification:

7351415, 7351421

Abstract:

A tuned flexure accelerometer, comprising, a housing; a gimbal coupled to the housing for oscillation about a gimbal oscillation axis; and a reference mass coupled by one or more pivots to the gimbal to allow pivoting motion of the reference mass relative to the gimbal about a pivot axis which is transverse to the gimbal oscillation axis, the one or more pivots having an effective elastic restraint. The gimbal is oscillated about its oscillation axis, to thereby induce on the one or more pivots an oscillating negative elastic restraint, to reduce the effective elastic restraint of the pivots.

US Patent:

6446217, Sep 3, 2002

Filed:

Mar 11, 1999

Appl. No.:

09/266679

Inventors:

Raymond Carroll - Boxford MA
Joseph G. Walsh - Cambridge MA

Assignee:

Milli Sensor Systems Actuators, Inc. - West Newton MA

International Classification:

G06F 104

US Classification:

713500, 713503

Abstract:

This invention describes a technique for measuring the peak amplitude and phase of an oscillating member without using any external precision references other than stable precision frequencies. The technique relies upon stable reference dimension of the oscillating member and stable dimensions of a stationary system which the member is oscillating with respect to. The technique uses a stable precision crystal clock oscillator to measure the time at which the oscillating member arrives at certain reference angles. The reference angles may be established on the member or by interferometry, with respect to sensors on a stationary member. Using inputs from the sensors, a precision clock, and counters the system determines the period of oscillation of the vibrating member and the phase of the maximum excursions of the vibrating member based on the time required for the oscillating member to move through the reference angles established on the reference member.

US Patent:

20030209073, Nov 13, 2003

Filed:

Apr 17, 2003

Appl. No.:

10/417857

Inventors:

Raymond Carroll - Boxford MA, US
Charles Dauwalter - Newton Highlands MA, US
Donato Cardarelli - Medfield MA, US

International Classification:

G01P015/13

US Classification:

073/504090, 073/514210

Abstract:

This invention relates to additional embodiments of the tuned flexure accelerometer (TFA) concept. The TFA reduces or eliminates the elastic restraint (also termed “spring stiffness”) of the reference mass support by means of oscillation to improve the ability to accurately measure distance, velocity or acceleration with the accelerometer. The invention also relates to tuning flexures in other applications such as mirrors so as to allow the mirror to hold rotation or translation position once moved, without additional torque or force.

US Patent:

45802700, Apr 1, 1986

Filed:

Jul 8, 1983

Appl. No.:

6/512172

Inventors:

William M. Johnson - Sudbury MA
Marc S. Weinberg - Needham MA
Raymond Carroll - Andover MA

Assignee:

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

H01S 308

US Classification:

372107

Abstract:

A high-energy laser system having gyroscopically stabilized optical elements includes an unstable confocal laser resonator having first and second spinning cavity feedback mirrors that resist mechanical wave energy induced spatial dislocations by gyroscopic inertia. One or both of the spinning cavity mirrors are preferably mounted for rotation with the rotor of a gyroscope. The gyroscope is operative as an actuator for selectively tilting the spinning mirror, and as a direction indicator for controlling the pointing direction of other elements with respect to inertial space. The angular rotation of the cavity feedback mirrors generates aerodynamic flows that cool the spinning mirrors by convective heat transport. Every material particle thereof describes an annular path once per revolution that prevents hot-spot formation and extends the useful lifetime.

US Patent:

52298310, Jul 20, 1993

Filed:

Sep 20, 1991

Appl. No.:

7/763342

Inventors:

Raymond Carroll - Andover MA
Bruce Porter - Sudbury MA

Assignee:

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

G01C 1972

US Classification:

356350

Abstract:

An axial gyroscopic pointing reference for mounting on optics within an internally cooled telescope a resonant fiber optic gyroscope, in which the elements of the fiber optic gyroscope are cryogenically cooled with the same system that cryogenically cools the telescope optical elements. In one specific configuration the pointing reference includes three orthogonally positioned resonant fiber optic gyroscopes supported in a tetrahedron configuration and cryogenically cooled by the telescope cooling system.

US Patent:

45639094, Jan 14, 1986

Filed:

Jul 2, 1982

Appl. No.:

6/394720

Inventors:

Raymond Carroll - Andover MA
Byong-Ho Ahn - Wayland MA

Assignee:

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

G01C 1928
G01C 1930

US Classification:

74 55

Abstract:

A system for electronically tuning and suppressing 2N rectification torques in a dynamically tuned free rotor gyroscope with a universal hinge, or a plurality of universal hinges. The system includes means to adjust the frequency of the drive shaft of the gyroscope to a speed such that the rotor precession due to direct elastic restraint torques is eliminated. In addition, the system includes means for measuring the two degree of freedom angular deviations of the principal axis of the rotor with respect to the gyroscope case, as well as the angular deviations of the shaft spin axis relative to the gyroscope case. The sensed angular deviations of both the rotor and shaft drive a torque generator which produces a torque on the rotor for nulling torque due to angular vibrations of the drive shaft with respect to the rotor. The controlled phasing and gain of the nulling torque provides both average bending compliance tuning and suppression of the 2N rectification.

US Patent:

44246862, Jan 10, 1984

Filed:

Mar 9, 1981

Appl. No.:

6/241947

Inventors:

James M. Lapeyre - New Orleans LA
Noel A. Svendsen - Marblehead MA
Richard S. Lindberg - Shrewsbury MA
Raymond J. Carroll - Billerica MA

Assignee:

The Laitram Corporation - New Orleans LA

International Classification:

F25D 2312

US Classification:

622591

Abstract:

A floor mounted air conditioner comprising a housing containing condenser coils disposed in a conical configuration about a normally vertical axis, and cylindrically configured evaporator coils coaxially disposed above the condenser coils. A drip pan separates the condenser and evaporator coils and includes openings for discharging condensate onto the condenser coils for evaporation. A condenser fan associated with a bottom duct adapted for installation in a mounting opening in the floor of a room blows hot air through the mounting opening, and an evaporator fan is associated with a top duct for blowing cool air into the room being cooled. Another fan is provided for blowing cool air over the compressor.

US Patent:

44585365, Jul 10, 1984

Filed:

Jul 6, 1982

Appl. No.:

6/395266

Inventors:

Byong-Ho Ahn - Wayland MA
Raymond Carroll - Andover MA
Kenneth Fertig - Sudbury MA
Michele S. Sapuppo - Andover MA
Howard L. Watson - South Weymouth MA
Marc S. Weinberg - Needham MA

Assignee:

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

G01V 116
G01P 1513
G01P 1502

US Classification:

73652

Abstract:

A single vibration sensor having the capability of sensing vibration along three rotational axes as well as three translational axes and exhibiting consistent dynamics over a wide frequency range. The sensor includes an elongated mass formed of a generally rigid material suspended in a fluid within a housing. The exterior surface of the mass is spaced from the interior surface of the housing to permit limited freedom of motion of the mass within the housing. The mass is provided with multiaxial radial and axial electromagnetic suspensions, and is typically supported by a fluid within the housing. Rotational positioning is provided by a signal generator, torque generator combination. Vibration is sensed by additive or differential measurements of current changes in the coils of different axes of the suspensions or electromagnetic signal and torque generator combinations. The sensor is conveniently implemented as a single degree of freedom inertial gyroscope without the gyroscope wheel and adapted to permit sensing of current changes in coils provided to achieve suspension or suspension and signal and torque generation functions.