Walter J Wiegand

US Patent:

40193837, Apr 26, 1977

Filed:

Jul 21, 1976

Appl. No.:

5/707174

Inventors:

Walter J. Wiegand - Glastonbury CT
Robert H. Bullis - Avon CT
Robert J. Mongeon - East Longmeadow MA

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

G01F 164

US Classification:

73194F

Abstract:

A sensor for measuring the flux of a gas and some simple alternate embodiments are disclosed. The sensor employs charged particle techniques and includes provision for compensating for environmentally produced changes in the charged particle source. The basic device includes an active region containing the charged particle source located between two upstream charged particle collectors and two downstream charged particle collectors, means for maintaining suitable electric fields between the charged particle source and the collectors, and means for measuring the electric current flowing in each collector. In operation, the sensor is able to compensate for changes in the charged particle source characteristics which would otherwise result in a change of sensor calibration.

US Patent:

54484448, Sep 5, 1995

Filed:

Jan 28, 1994

Appl. No.:

8/188257

Inventors:

Paul L. Provenzano - West Hartford CT
James L. Swindal - East Hampton CT
Robert J. Kuhlberg - Windsor CT
Charles B. Brahm - Ellington CT
Harold D. Meyer - South Windsor CT
Frank W. Gobetz - South Windsor CT
Walter J. Wiegand - Glastonbury CT
Robert H. Bullis - Avon CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

H01G 700

US Classification:

3612834

Abstract:

A silicon capacitive pressure sensor is disclosed that has a glass dielectric material sputter-deposited onto a silicon substrate of the sensor. After deposition of the bulk dielectric material, the glass is patterned and etched to form a pair of concentric rings. An inner ring is of a circular shape, while the outer ring is of an octagonal shape. As compared to prior art dielectric spacers which are of a single ring of relatively wide thickness, the pair of concentric rings disclosed herein significantly reduce the parasitic capacitance of the glass dielectric material, thereby increasing the sensitivity of the sensor.

US Patent:

44637292, Aug 7, 1984

Filed:

Nov 14, 1983

Appl. No.:

6/551791

Inventors:

Robert H. Bullis - Avon CT
Robert A. DiDomenico - Ludlow MA
John A. Kimberley - East Granby CT
Thomas M. McHugh - Manchester CT
Christopher A. Parent - West Springfield MA
James R. Voss - Wilbraham MA
Walter J. Wiegand - Glastonbury CT

Assignee:

AMBAC Industries, Incorporated - Springfield MA

International Classification:

F02M 5100

US Classification:

123478

Abstract:

The method and apparatus for generating start of combustion signals associated with the combustion events in a diesel engine, and for using such signals to control the timing of fuel delivery to the engine. The combustion event is sensed, as by an electrostatic or optical sensor, and signal conditioning circuitry provides a start-of-combustion signal which is directly and precisely indicative of the time of the onset of combustion. The sensors include self-cleaning capabilities for extended operating life on an engine. The sensors may be incorporated in the structure of a glow plug. The SOC signal is advantageously supplied to a timing control circuit which delivers a timing control signal to a fuel delivery device, such as the controller associated with a fuel pump. The control circuit stores one or more start of combustion values which indicate the desired timing, relative to an engine cycle, for the start of the combustion event as a function of speed and load. One or more adjustment signals are stored and applied as a function of speed and load to adjust the desired signal such that the control signal is corrected for delays.

US Patent:

40745724, Feb 21, 1978

Filed:

Jul 28, 1975

Appl. No.:

5/599560

Inventors:

Robert H. Bullis - Avon CT
Russell G. Meyerand - Glastonbury CT
Walter J. Wiegand - Glastonbury CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

G01F 164

US Classification:

73194F

Abstract:

Various apparatus and their applications to the determination of the flux of a fluid flowing through a region in accordance with the present invention are disclosed. The technique involved is based on the formation of charged particles within the fluid and subjecting these particles to an electric field which is colinear with the direction of fluid travel. Two charged particle collection stations are established, one upstream and the other downstream of the charged particle formation site and the resulting electric currents through such stations are correlated to the flux of the fluid.

US Patent:

48783838, Nov 7, 1989

Filed:

Nov 2, 1987

Appl. No.:

7/115304

Inventors:

Walter J. Wiegand - Glastonbury CT
Robert H. Bullis - Avon CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

G01F 2300

US Classification:

73293

Abstract:

The present invention is related to a sight glass(10) that utilizes both reflected light at a glass to air interface(40) as well as the light transmitted through a glass to fluid to glass interface(44) to form a light pattern that is indicative of the true fluid level. By requiring that light always appear in either an "air" or "fluid" channel(42,46), any absence of light is assumed due to film coated surfaces or to other abnormal conditions. An absence of light is a signal that maintenance is required.

US Patent:

54449014, Aug 29, 1995

Filed:

Oct 25, 1993

Appl. No.:

8/142237

Inventors:

Walter J. Wiegand - Glastonbury CT
Frank W. Gobetz - South Windsor CT
Robert H. Bullis - Avon CT
James P. Towey - West Granby CT
James W. Lennon - West Suffield CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

H01G 700
G01L 912

US Classification:

29 2542

Abstract:

A dual-element, parallel-plate silicon capacitative pressure sensor includes a pressure sensing element and a reference element of identical structure. Both elements are separately fabricated from the same silicon wafers using identical processing steps. Further, both elements are simultaneously mounted to a header using identical mounting steps. Such identical fabrication and mounting steps serve to identically match the dielectric materials and, thus, the aging properties of both the sensing and reference elements. By matching the sensing and reference elements in these ways, and by aging these components at elevated temperatures in exactly the same way, it is possible to achieve an extremely close match in long-term dielectric aging properties.

US Patent:

49300423, May 29, 1990

Filed:

Feb 28, 1989

Appl. No.:

7/317240

Inventors:

Walter J. Wiegand - Glastonbury CT
James L. Swindal - East Hampton CT
Richard E. Swarts - Simsbury CT
Robert H. Bullis - Avon CT
Mario T. Lopiccolo - Southington CT
Daniel H. Grantham - Glastonbury CT
Arthur G. Foyt - Glastonbury CT

Assignee:

United Technologies - Hartford CT

International Classification:

H01G 700
G01P 1508

US Classification:

361280

Abstract:

A micromachined three-plate capacitive accelerometer incorporates hinges attached to top and bottom surfaces of the proof mass that are symmetric about X and Y axes and also about diagonal axes; passageways for gas film damping in the fixed members that do not affect the capacitance to any significant degree; and provision for independently selecting two of the parameters sensitivity, capacitance and maximum acceleration.

US Patent:

54409314, Aug 15, 1995

Filed:

Oct 25, 1993

Appl. No.:

8/142236

Inventors:

Walter J. Wiegand - Glastonbury CT
Frank W. Gobetz - South Windsor CT
Robert H. Bullis - Avon CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

G01L 912

US Classification:

73724

Abstract:

A dual-element, parallel-plate silicon capacitative pressure sensor includes a pressure sensing element and a reference element of identical structure. Both elements are fabricated from the same silicon wafers using identical processing steps. Further, both elements are simultaneously mounted to a header using identical mounting steps. Such identical fabrication and mounting steps serve to identically match the dielectric materials and, thus, the aging properties of both the sensing and reference elements. By matching the sensing and reference elements in these ways, and by aging these components at elevated temperatures in exactly the same way, it is possible to achieve an extremely close match in long-term dielectric aging properties.