US Government As Represented by the Secretary of the Army

Stacy E Gehman

Allen B Holmes

Carl J Campagnuolo

Maurice F Funke

Evan D Fisher

A liquid telemetry system is disclosed useful for transmitting data through a fluid body by means of pulses in the fluid. To generate the pulses in the fluid the system utilizes a bi-stable fluid amplifier in conjunction with a vortex valve. Control input signals direct the flow of fluid from the bi-stable amplifier into the vortex valve in such manner as to selectively impede the flow of fluid through the vortex valve. The resulting changes in fluid flow rates generate pulses within the fluid body.

Fluidic mud pulser

A hydrostatic seismic sensor including a sensing mass suspended on a defoble reservoir containing a sensing fluid and a differential pressure transducer to measure the pressure in the reservoir.

Hydrostatic seismic sensor

A low 'g' hydrostatic accelerometer including a differential pressure traucer interposed between a sensing mass, and a pressurized low density fluid.

Hydrostatic accelerometer

The transmitter for an A.C. capacitance proximity fuze consists of an A.C. enerator whose output is directly connected to the transmitter probes of an A.C. capacitance fuze. The A.C. generator may be either a wind driven alternator or a fluid oscillator power supply driven by the ram pressure of the air. This arrangement eliminates the need for a separate oscillator as the power supply is now also the transmitter.

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Takoma Park, MD, United States of America

Stacy E Gehman