Michael W Scanlon

50762842, Dec 31, 1991

Oct 23, 1990

7/607432

James W. Joyce - Rockville MD
Nassy Srour - Silver Spring MD
Michael V. Scanlon - Springfield VA
Stephen M. Tenney - Rockville MD
George Mon - Potomac MD
John P. Gills - Washington DC

The United States of America as represented by the Secretary of the Army - Washington DC

A61B 702

128773

A heart-sound monitor and esophageal stethoscope which makes use of fluidic aminar proportional amplifiers (LPAs). These LPA's are used to sense and amplify incoming acoustic pressure signals, such as heart signals. Moreover, the fluidic monitor is able to monitor a fetus heartbeat while eliminating the acoustic interference present from the mother's heartbeat. In this case, the LPA acts not only as an amplifier, but as an acoustic filter as well.

51649195, Nov 17, 1992

Dec 6, 1991

7/802796

Michael Scanlon - Springfield VA
Stephen M. Tenney - Rockville MD
Nassy Srour - Silver Spring MD
James W. Joyce - Rockville MD

United States of America as represented by the Secretary of the Army - Washington DC

H04R 1500

367135

A sonar sensor comprising a substantially non-corrodible housing and a fluidic gainblock disposed therein. In addition, one or more fluid-filled laminar proportional amplifiers are arranged either in series or in parallel and contained within the fluidic gainblock. Means are provided to produce a jet within each laminar proportional amplifier, which is then modulated by incoming acoustic signals. The pressure caused by diverting the jet from its equilibrium path is proportional to, but greater than, the incoming acoustic signal. Hydrophones are used to convert the amplified acoustic signal into an electrical signal. In one embodiment, the fluidic gainblock is free-flooded and open to the liquid environment in which it is used, obviating the need for pressure equalization. In another embodiment, the fluidic gainblock is provided with filtering means for prevent the accumulation of sediment within the cavities making up the laminar proportional amplifiers. In yet another embodiment, the fluidic gainblock is a closed-system which recirculates its fluid supply, increasing the sensor's operating life and isolating the laminar proportional amplifiers therein.

49208543, May 1, 1990

Jun 27, 1989

7/374126

Michael V. Scanlon - Springfield VA

The United States of America as represented by the Secretary of the Army - Washington DC

F41F 1712

89 144

A noise suppressor and stabilizer for a firearm having a number of fluidic scillator laminates each having a number of fluidic pressure controlled oscillators disposed thereon stacked and attached to the muzzle end of a firearm. The pressure controlled oscillators exhaust part of the propellant gases at a frequency either above the range of detection by the human ear or at a less sensitive region of hearing thus lowering the characteristic muzzle blast heard as the bullet exits the muzzle of the firearm. Additional laminates having the pressure controlled oscillators asymmetrically placed are provided to compensate for muzzle climb. Twist of the firearm is controlled by the placement of one or more twist compensating laminates within the stack. One embodiment of the invention provides for laminates of different internal dimensions forms expansion chambers within the noise suppressor.