USA As Represented by Secretary of the Navy

John R Renzi

Charles Stevens Coffey

John P Martin

William M Hinckley

An apparatus for measuring pressure includes a cylindrical tube having an open end and a closed end; a piston disposed in the cylindrical tube at the open end; an accelerometer attached to a side of the piston that faces the closed end of the tube, the accelerometer for measuring the acceleration of the piston after a blast event; and a pressure sensor located inside the tube for measuring pressure in the tube between the piston and the closed end of the tube. The apparatus also includes a data processor and computer connected by wires to the accelerometer and pressure sensor for receiving signals generated by the accelerometer and pressure sensor.

Blast pressure gauge

In response to an abort command, fragmentation of a propellant booster rot carried on a missile is limited by positioning of annular shaped charges at axially spaced locations on the outer shell of the booster rocket. Detonation of the charges thereby severs an intermediate section of the rocket from forward and aft sections which remain attached to the missile. The intermediate section is separated from the missile by such severing action to prevent further fragmenting forces from being imparted thereto.

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Ellicott City, MD, United States of America

John R Renzi