CHARLES R DAUWALTER
Engineering in Newton, MA
License number
Massachusetts 25439
Issued Date
Dec 17, 1971
Expiration Date
Jun 30, 1984
Type
Mechanical Engineer
Address
Address
Newton, MA 02459
Personal information
See more information about CHARLES R DAUWALTER at radaris.comName
Address
Phone
186 Woodward St, Newton Hlds, MA 02461
186 Woodward St, Newton Highlands, MA 02461
186 Woodward St, Newton Hlds, MA 02461
Professional information
Electrically Decoupled Silicon Gyroscope
US Patent:
6626039, Sep 30, 2003
Filed:
Sep 13, 2000
Appl. No.:
09/660740
Inventors:
Scott G. Adams - Ithaca NY
James Groves - Endicott NY
Donato Cardarelli - Medfield MA
Raymond Carroll - Boxford MA
Charles R. Dauwalter - Newton Highlands MA
James Groves - Endicott NY
Donato Cardarelli - Medfield MA
Raymond Carroll - Boxford MA
Charles R. Dauwalter - Newton Highlands MA
Assignee:
MilliSensor Systems and Actuators, Inc. - West Newton MA
International Classification:
G01C 1902
US Classification:
7350404, 7350408, 7350411, 73510, 7351402
Abstract:
An oscillatory gyroscope is described with decoupled drive and sense oscillators and reduced cross-axis sensitivity. The gyroscope is fabricated using a plasma micromachining process on standard silicon wafers. The electrical isolation of the drive and sense functions of the gyroscope, contained within the same micromechanical element, reduce cross-coupling while obtaining high inertial mass and high sensitivity.
Method Of Fabricating A Rate Gyroscope And Accelerometer Multisensor
US Patent:
7356922, Apr 15, 2008
Filed:
Apr 25, 2005
Appl. No.:
11/113965
Inventors:
Charles R. Dauwalter - Newton Highlands MA, US
Donato Cardarelli - Medfield MA, US
Paul Greiff - Wayland MA, US
Donato Cardarelli - Medfield MA, US
Paul Greiff - Wayland MA, US
Assignee:
Milli Sensors Systems & Actuators, Inc. - West Newton MA
International Classification:
H05K 3/02, H05K 3/10
US Classification:
29846, 296021, 2960316, 29847, 29853, 310 12, 310 905, 310266, 310268, 438 3, 438 48
Abstract:
Three magnetic substrates are provided, the first substrate forms the rotor and the other two form the outer stator. A series of spaced concentric grooves and spaced spiral grooves are formed in the central region of both faces of the first substrate. A hole is placed at the center of the spiral grooves, and filled with magnetic material. A conductor is then deposited into the spiral grooves, forming a central wheel. A series of spaced serpentine grooves and generally radial grooves are formed on each active face of the other two substrates. A conductor is then deposited into the serpentine grooves, and a magnetic material is deposited into the generally radial grooves. The two outer substrates are then bonded against the first substrate such that the outer end of each magnetic path overlays a filled hole in the first substrate, creating the stator of an axial air gap reluctance motor.
Power Failure Interrupt Recovery For The Pendulous Oscillating Gyroscopic Accelerometer (Poga)
US Patent:
6107616, Aug 22, 2000
Filed:
Mar 3, 1999
Appl. No.:
9/261326
Inventors:
Charles R. Dauwalter - Newton Highlands MA
Assignee:
Milli Sensor Ststems & Actuators, Inc. - West Newton MA
International Classification:
G01P 1514, G01C 1902
US Classification:
244 32
Abstract:
A system for protecting a pendulous oscillating gyroscopic accelerometer (POGA) from power failure interruption (PFI) events, the POGA having a servo driven member (SDM), rotor driven member (RDM), and torque summing member (TSM), wherein the POGA is a part of an accelerometer system of a guidance system which detects such events and communicates them to the accelerometer system. In the invention, the acceleration is stored just prior to the PFI induced system shut-down, and after the PFI the POGA drives are turned back on. The velocity change during the PFI is determined based on the TSM deflection occurring during the PFI event, acceleration existing at the beginning, and elapsed time. This is reported to the guidance system in a timely fashion.
Tuned Flexure Accelerometer
US Patent:
2003020, 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
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.
Flat-Pack Gyroscope
US Patent:
5881598, Mar 16, 1999
Filed:
Jun 27, 1997
Appl. No.:
8/884291
Inventors:
Michele Sapuppo - Andover MA
Donato Cardarelli - Medfield MA
Charles R. Dauwalter - Newton Highlands MA
Donato Cardarelli - Medfield MA
Charles R. Dauwalter - Newton Highlands MA
Assignee:
Milli Sensor Systems and Actuators, Inc. - West Newton MA
International Classification:
G01C 1928, G01C 1906
US Classification:
74 56E
Abstract:
A flat pack gyroscope fabricated of a number of discrete flat layers, which, when assembled together, accomplish a version of a single degree of freedom, spinning wheel gyroscope.