MARC S WEINBERG
Engineering in Needham, MA

4580270, Apr 1, 1986

Jul 8, 1983

6/512172

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

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

H01S 308

372107

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.

5952574, Sep 14, 1999

Apr 29, 1997

8/841224

Marc S. Weinberg - Needham MA
Steven T. Cho - Santa Clara CA
Ralph E. Hopkins - Brookline MA
Lance C. Niles - Salem MA
Anthony S. Kourepenis - Acton MA
Eric M. Hildebrant - Watertown MA
Paul A. Ward - Roslindale MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01C 1900

7350416

Trenches which reduce or eliminate force and sensitivity associated with proof mass motion normal to the substrate as a result of voltage transients is disclosed. The trenches provide increased separation between interleaved comb electrodes and the substrate, and thereby also reduce the comb lift to drive ratio. The trenches are typically formed directly below the interleaved comb electrodes, but may also be formed below other suspended portions. Trench depth is from 6-10 microns and provides a comb electrode to substrate separation of approximately 8. 5-12. 5 microns.

5388458, Feb 14, 1995

Nov 24, 1992

7/981167

Marc S. Weinberg - Needham MA
Anthony Petrovich - Tewksbury MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01P 904

73505

A resonantly vibrating or tuning fork rate sensor in which a quartz beam is instrumented with electrodes in first and second regions forming respective sense and drive electrodes wherein the piezoelectric resonance affect of the quartz material between the drive electrodes is used as a tuning element for an oscillator circuit. The electrodes are driven in a balanced voltage mode and sensed in a common mode rejection differential amplifier while leads running to the electrodes along the quartz beam are placed at positions of minimal field strength for improving the signal to noise ratio of the device. The rate sensor utilizes a multi-electrode pattern in order to make such lead placement possible. The sense pattern and drive pattern may be either in one orientation with the drive electrodes proximate to the body of the quartz resonator or in a second pattern with the sense electrodes proximate to the body. Both the drive electrodes and the sense electrodes operate on the piezoelectric principal, utilizing constriction to induce vibration from the drive electrodes and sensing the current generated from piezoelectric effect resulting from the vibrational compression which occurs out of the plane of vibration during inertial rate input.

5783973, Jul 21, 1998

Feb 24, 1997

8/804796

Marc S. Weinberg - Needham MA
Paul A. Ward - Roslindale MA
Anthony S. Kourepenis - Acton MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

H03L 700

331 35

Micromachined, thermally insensitive silicon resonators are provided having accuracy equivalent or superior to that of quartz resonators, and are fabricated from a micromechanical, silicon-on-glass process. In one embodiment, such a resonator is realized using a tuning fork gyroscope. Radiation-hard precision voltage references (PVRs) are enabled using the silicon resonators. Thermal sensitivity is reduced relative to that of a silicon-on-silicon process oscillator, providing a thermal sensitivity comparable to that of a quartz oscillator. By employing a micromechanical device based upon a tuning fork gyroscope, resonators are made from either or both of the gyro drive and sense axes. A resonator constructed as an oscillator loop whose resonant frequency is compared to a frequency standard provides a bias voltage as a reference voltage.

5060039, Oct 22, 1991

Feb 22, 1989

7/314453

Marc S. Weinberg - Needham MA
Paul Greiff - Wayland MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

H01L 2984, H01L 2722, G01P 1508, G01P 1500

357 26

An accelerometer fabricated by micromachining techniques from a crystaline precursor. The accelerometer is formed in a body of a semiconductor crystal such as silicon by doping portions to an etch resistant condition and etching a cavity around them to release a resiliently suspended multi legged member. A conductor is formed in one of the legs. A permanent magnet is placed with opposite polarity poles on either side of the leg and the acceleration displacement of the member sensed from which a current is developed through the leg conductor to restore the member position and provide an output indication of acceleration.

7426861, Sep 23, 2008

Jun 15, 2005

11/153664

Marc S. Weinberg - Needham MA, US
Jonathan Bernstein - Medfield MA, US
Jeffrey T. Borenstein - Holliston MA, US
Richard Elliott - Stoneham MA, US
Gregory Kirkos - Seattle WA, US
Anthony S. Kourepenis - Acton MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01P 9/04, G01P 15/125

7350416, 7351432

A tuning fork gyroscope design where at least one proof mass is supported above a substrate. At least one drive electrode is also supported above the substrate adjacent the proof mass. Typically, the proof mass and the drive electrode include interleaved electrode fingers. A sense plate or shield electrode on the substrate beneath the proof mass extends completely under the extent of the electrode fingers of proof mass.

2009006, Mar 12, 2009

Mar 17, 2008

12/049692

H. Charles Tapalian - Seekonk MA, US
Francis J. Rogomentich - Wilmington MA, US
Marc Steven Weinberg - Needham MA, US

A61B 5/05

600425

An apparatus is disclosed including: an optical coherence tomographic system; a spinal needle having a needle tip adapted to penetrate tissue; and an optical delivery system adapted to direct probe light from the optical coherence tomographic system onto tissue located in front of the needle tip, collect test light backscattered from the tissue, and transmit the test light to the optical coherence tomographic system. The optical coherence tomographic system is adapted to provide information indicative of one or more properties of the tissue based on the test light.

5351541, Oct 4, 1994

Jan 22, 1992

7/823866

Anthony Petrovich - Tewksbury MA
Marc Weinberg - Needham MA

Charles Stark Draper Laboratories - Cambridge MA

G01P 1508

73517R

A microwave resonator accelerometer including a microwave resonant cavity having a predetermined resonant frequency; the cavity including a flexible portion; a proof mass fixed to the flexible portion for changing the geometry and establishing a new resonant frequency of the cavity in response to an acceleration force on the proof mass; a microwave frequency signal at or approximately at the predetermined resonant frequency coupled to the cavity; and a discrimination circuit, responsive to the reflected microwave signal from the cavity, for discriminating a shift in the predetermined resonant frequency of the cavity to a new resonant frequency effected by the change in geometry of the cavity resulting from the acceleration force on the proof mass.

6928875, Aug 16, 2005

Jan 14, 2003

10/341666

James A. Bickford - Winchester MA, US
Marc S. Weinberg - Needham MA, US
Anthony Petrovich - Tewksbury MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01P015/08

7351431, 7351416, 73497

A system and method for compensating for gradients in a dual cavity device such as but not limited to an accelerometer. A first source drives a first cavity at least two different modes, at least one mode varying with changes in cavity length. A second source drives a second cavity at least two different modes, at least one mode varying with changes in cavity length. A processor determines changes in cavity length as a function of both modes in both cavities to compensate for non-uniform behavior between the cavities.

6862934, Mar 8, 2005

Oct 4, 2002

10/264887

Marc S. Weinberg - Needham MA, US
Anthony S. Kourepenis - Acton MA, US
William D. Sawyer - Lexington MA, US
Jeffrey T. Borenstein - Holliston MA, US
James H. Connelly - Weymouth MA, US
Amy E. Duwel - Cambridge MA, US
Christopher M. Lento - Boston MA, US
James R. Cousens - Hanson MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01P015/08

7350412, 7350402, 7350416

A tuning fork gyroscope typically including at least one proof mass with an upper sense plate disposed above the proof mass and a lower sense plate disposed below the proof mass and means for sensing changes in the nominal gaps between the sense plate and the proof mass and for outputting a signal indicative of the gyroscope angular rate.