Fluid oscillator
 A telemetry system is disclosed which utilizes a fluid feedback oscillator n conjunction with a flow restricting device in order to generate pulses in a fluid. Means are provided to turn the oscillator on or off or to vary the frequency of oscillation, thereby permitting the transmission of information by means of the fluid pulses. 
The United States of America as represented by the Secretary of the Army
Y Y F E E
Y10T Y10T F15C E21B E21B
additional additional inventional inventional inventional
Allen B.
Holmes