1
William L Konrad: Cavitating parametric underwater acoustic source. The United States of America represented by the Secretary of the Navy, Richard S Sciascia, Arthur A McGill, Prithvi C Lall, June 15, 1976: US03964013 (11 worldwide citation)

A cavitating parametric underwater acoustic source for generating efficiey acoustic energy at low and medium frequencies. The source comprises a plurality of electro-acoustic transducer elements which are electrically energized in a liquid medium such as water at two or more primary frequencies. Cha ...


2
William L Konrad: Non-invasive acoustic velocimetric apparatus and method. The United States of America represented by the Secretary of the Navy, Michael J McGowan, Prithvi C Lall, James M Kasischke, March 28, 1995: US05402393 (7 worldwide citation)

A first projector that generates a beam of acoustic energy having a first equency, and a second acoustic projector that generates a beam of acoustic energy having a second frequency are provided. Interaction between the intersecting beams and particles present in the aquatic environment cause radiat ...


3
Mark B Moffett, William L Konrad: System for detection of transducer defects. The United States of America represented by the Secretary of the Navy, Robert F Beers, Arthur A McGill, Michael J McGowan, May 1, 1984: US04445361 (6 worldwide citation)

Apparatus and method for nondestructive detection of loose parts or faulty onds in sound transducers by measuring erratic second-order nonlinear difference-frequency responses of the test transducer to a pulsed high level dual-frequency sound field produced by a high power projector. Such field may ...


4
Kim C Benjamin, Steve E Forsthe, William L Konrad: Filigree electrode pattern apparatus for steering parametric mode acoustic beams. The United States of America Represented by the Secretary of the Navy, James M Kasischke, Michael F Oglo, Jean Paul A Nasser, December 9, 2003: US06661739 (6 worldwide citation)

A piezoelectric embedded monolithic active surface for transmitting a directed acoustic beam comprising a monolithic active surface, a plurality of piezoelectric elements embedded on the surface forming an array comprising, a plurality of coupled frequency pairs comprising, a first primary frequency ...


5
William L Konrad: Propagation sampled acoustic line array. The United States of America represented by the Secretary of the Navy, Richard S Sciascia, Arthur A McGill, Prithvi C Lall, November 27, 1979: US04176339 (5 worldwide citation)

An acoustic line array which includes a co-axial cable having a center coctor surrounded by a flexible material of low-electrical conductivity. The flexible material is surrounded by a conducting material protected by an external shield. The cable has characteristic impedance which is sensitive to p ...


6
William L Konrad: Driver for high power sonar systems. The United States of America represented by the Secretary of the Navy, Robert F Beers, Arthur A McGill, Prithvi C Lall, August 23, 1983: US04400804 (4 worldwide citation)

A high power sonar pulse generator driven by a low power electrical motor erein a flywheel, placed in the mechanical system, connects the small motor and large generator. Since the large power output from the pulse generator is required only intermittently, the energy stored in the rotating flywheel ...


7
William L Konrad: Disappearing baffle for sonar arrays. The United States of America represented by the Secretary of the Navy, Michael J McGowan, Arthur A McGill, Prithvi C Lall, March 21, 1989: US04815049 (3 worldwide citation)

A selectively transparent baffle means for controlling beam pattern dispel or direction, further comprising a plurality of parallel, vertically oriented, compliant tubes each of which attach to one of two header tubes at one end while the opposite ends are open to sea pressure. The headers provide a ...


8
William L Konrad, William L Clay: Summing amplifier. The United States of America represented by the Secretary of the Navy, Robert F Beers, Arthur A McGill, January 19, 1982: US04311929 (3 worldwide citation)

A summing amplifier which sums and amplifies two input signals and combines them in a single load or output device. It includes a bridge circuit using either 4 NPN or 4 PNP type transistors. Two transformers are used to achieve input relationship. A square wave of different frequency is applied to e ...


9
William L Konrad: Means for proximal end measurement of AC voltage across distal end cable load. The United States of America represented by the Secretary of the Navy, Michael J McGowan, Arthur A McGill, Prithvi C Lall, May 30, 1989: US04835462 (2 worldwide citation)

A voltage measuring device for accurately sensing the AC load voltage at remote, distal end of a long, two-conductor cable, the measuring device comprising a parallel arrangement of an AC source and a DC voltmeter, located at the proximal, source end of the cable, and an AC load in parallel with a p ...


10
Mark J Vaccaro, Thomas R Stottlemyer, William L Konrad: Underwater sound source with timed actuator. The United States of America represented by the Secretary of the Navy, Michael J McGowan, Prithvi C Lall, Michael F Oglo, December 29, 1992: US05175712 (2 worldwide citation)

An autonomous underwater acoustic charge deployment buoy that can deploy ustic charges at preselected time periods. The device can operate away from any control vessels or structures. The device comprises a plurality of launch tubes disposed within a frame supported by an elastomeric floatation coll ...