GEORGE ROBERT DOUGLAS
Engineers in Arnold, MD

4088907, May 9, 1978

Oct 29, 1976

5/736799

Charles H. Jones - Pasadena MD
George R. Douglas - Arnold MD

Westinghouse Electric Corp. - Pittsburgh PA

H01L 4104

310333

A detector of acoustic emissions from a structure includes a piezoelectric element responsive to both compressional wave energy and to shear wave energy from any direction so that the source of the acoustic emission may be determined.

4259732, Mar 31, 1981

Jun 4, 1979

6/045452

Phillip R. Anderson - Columbia MD
George R. Douglas - Arnold MD
John H. Thompson - Severna Park MD

Westinghouse Electric Corp. - Pittsburgh PA

H04R 2900

367 13

An acoustic homing torpedo having an array of transducers wherein each transducer has a head mass, tail mass, and a main active element therebetween. An auxiliary active element is placed on the tail mass so that when given a predetermined signal it will cause the main element to provide a corresponding output signal so as to simulate the reception of an actual acoustic wave. By energizing the main element, the response of the auxiliary element may be examined for testing the transducer and the array in a transmit mode of operation.

4704709, Nov 3, 1987

Jul 12, 1985

6/754508

Gary R. Slebzak - Annapolis MD
John H. Thompson - Severna Park MD
George R. Douglas - Arnold MD

Westinghouse Electric Corp. - Pittsburgh PA

H04R 1500, H04R 1700

367158

A Tonpilz transducer having head and tail masses with an interposed active transducer section. The transducer unit is positioned within a housing which has a shoulder portion upon which rests a snubber member which extends to a position just behind the head mass. The transducer is supported from the head mass by means of a thin fiberglass tube which extends from the rear of the head mass and engages a flange portion of the snubber member in the vicinity of the housing shoulder. The housing has a waterproof covering as does the head member with the covering of the head member being secured to the covering by means of a removable strap such that the transducer assembly may be disassembled for repair.

4208737, Jun 17, 1980

Dec 6, 1978

5/967179

John H. Thompson - Severna Park MD
George R. Douglas - Arnold MD

Westinghouse Electric Corp. - Pittsburgh PA

H04B 1300

367171

A dipole hydrophone having a differential pressure sensing unit, for example, a multi-laminar bender disc, within a liquid filled housing. Two liquid filled acoustic waveguides form extensions of the housing and include pressure sensing ports. A mass of predetermined value is connected to the sensing unit and with a predetermined separation between sensing ports, the mass value is chosen so that the sensing unit response to acceleration is very nearly equal and opposite to its response due to the inertial mass of the liquid.

4227110, Oct 7, 1980

Nov 10, 1976

5/740683

George R. Douglas - Arnold MD
John H. Thompson - Severna Park MD

Westinghouse Electric Corp. - Pittsburgh PA

H01L 4110

310316

A control system for a Tonpilz transducer which is positioned between the transducer and the transducer drive amplifier. The control system determines the head velocity of the transducer from the input current and voltage and utilizes this determination in a feedback arrangement to maintain proper transducer excitation.

5109363, Apr 28, 1992

Sep 15, 1983

6/532425

Charles H. Jones - Pasadena MD
John H. Thompson - Severna Park MD
George R. Douglas - Arnold MD

Westinghouse Electric Corp. - Pittsburgh PA

H04R 1700

367151

A transducer assembly which includes a plurality of staves releasably arranged around the periphery of a torpedo. Each stave includes a transducer backing member such as foam polyurethane to simulate an air backing, and a solid acoustically transparent transducer support member, such as polyurethane, disposed in front of it. A curved reflector made up of a plurality of sheets of onionskin paper is positioned between, and compressed by, the backing and transducer support members. A plurality of transducer active elements is arranged vertically within the transducer support member with the arrangement imparting a certain desired directivity pattern to receiving beams associated with such apparatus.