USA As Represented by Secretary of the Navy

Kenneth L Moore

Russell E Reed

William L Black

Stanley E Wood

Robert E Hunt

May L Chan

Gary W Meyers

A gas generating composition containing glycidyl azide polymer and a high trogen content additive selected from the group consisting of guanylaminotetrazole nitrate, bis(triaminoguanidinium)5,5'azotetrazole, ammonium 5-nitraminotetrazole and high bulk density nitro guanidine generates large quantities of nitrogen gas upon burning and can be used to extinguish fires.

Pyrotechnic fire extinguishing method

This invention concerns an improved round for use in liquid propellant gu The improved round comprises a projectile attached to a carrier which is shaped like an abbreviated cartridge case. The carrier has a plurality of injection ports that communicate to an expandable volume. Sealing means prevent the escape of liquid propellant from the expandable volume which upon injection causes the projectile to be pumped to a forcing cone leaving the carrier behind. Several ignition means are used employing Boxer, Berdan or electric primers.

Projectile carrier for liquid propellant gun

A duplex projectile to be fired from a gun bore is made up of a tubular pectile and a conical shaped projectile fastened within the tubular projectile by means which are capable of withstanding acceleration forces on the round while the round is within the bore after being fired but which release the conical projectile from the tubular projectile once the two exit from the bore.

Duplex round

A light detector with level shift and shaped pulse is obtained by circuitry hich provides both short turn off time and high sensitivity. The phototransistor does not provide the reference signal until nearly at maximum output.

Level-shift and pulse shaping circuitry

A method for stabilizing the soil wherein a liquid selected from the group onsisting of (1) a mixture of dimer diisocyanate and dimer diamine; and (2 ) a mixture of dimer diisocyanate and a ketimine derivative of dimer diamine is applied to the soil and allowed to polymerize to form an elastomeric resin which bonds the soil particles together to form a composite structure.

Soil stabilization materials and methods

Gun propellant is coated with an oligomer having the structure: ##STR1## wherein R is --CH.sub.2 CH.sub.2 CH.sub.2 Si(OCH.sub.3).sub.3 ; wherein n s an integer of from 5 to 50 and wherein m is an integer of from 1 to 5. The purpose of the coating is to decrease the peak pressure produced but make the pressure that is produced last longer.

Inhibitor for gun propellants

Measurement and correlation of chamber pressure and projectile position d is accomplished using an array of phototransistors, illuminated by collimated light, which phototransistors are sequentially switched off due to the interruption of the collimated light by the passing projectile. Pulses generated thereby may be displayed on an oscilloscope along with the pressure-time trace.

Apparatus for determining projectile position and barrel pressure

A spectrometer with the basic optical elements is described which scans the spectrum electronically rather than by mechanical manipulation or use of image tubes. The detecting elements are light sensitive charge coupled device detector arrays.

Spectrometer with electronic readout

A continuous polymer film formed by air-activated cross-linking of polyfuional prepolymers is applied to the surface of a body of water for suppressing evaporation.

Method for suppressing water evaporation using a polybutadiene film

A system for eliminating background signals in chopped infrared measuring systems employs operational amplifier principles for subtracting a reference signal of proper amplitude, phase and frequency from the background-plus-signal radiation. The output is converted to a dc voltage level directly related to incident flux.

Infrared background suppression

A method of producing an optical reticle and the reticle produced thereby. thin layer of aluminum is deposited on the face of a sapphire substrate and a reticle pattern is chemically etched therein. The system is then exposed to air at an elevated temperature for approximately one hour to oxidize the remaining aluminum layer. A film of titanium is next placed over the rough aluminum oxide as by sputtering, for example, and the excess titanium is etched away by the same pattern to produce the finished reticle.

Growing community of inventors

China Lake, CA, United States of America

Kenneth L Moore