Abstract: An electrooptical system and technique for direct quantitative measurement of the mass concentration of monodisperse aerosols by means of filling an enclosed chamber with a cloud or a sequence of separate clouds of essentially transparent and spherical, aerosolized particles or droplets of known density and known or selectively controlled particle size. While within the confines of the chamber the cloud, or each of the sequence of clouds, of aerosolized particles is maintained in a homogeneous condition and irradiated with a beam of high-intensity and constant wavelength irradiation selected to possess a wavelength to particle size ratio wherein attenuation of the irradiation will be almost exclusively, if not nearly entirely, attributable to optical scattering.

Abstract: The present invention discloses a gastight seal for rubber suits. It incls rubber bladders containing viscid material and has annular rings attached to a pleated bellows-like section of a main body of the rubber suit. A strap is used to actuate the rubber bladders which interlock the annular rings which join two sections of the main body of the rubber suit. Thus, an integral gastight seal on the rubber suit section is achieved.

Abstract: Decontaminating an object such as a vehicle, is achieved by subjecting the bject to an elevated temperature for a time sufficient to achieve the desired temperature. The heat source is preferably a jet engine which is supported for universal movement. The temperature of the surface of the object under treatment is determined by sensing the infrared radiation emanating from the surface of the object. In response to the attainment of a predetermined level of infrared radiation, an electric control member is used to regulate the movement of said heat source. Thus heating is caused to be directed at selected regions of the object under treatment for the time period necessary to attain the desired temperature level.

Abstract: An improved circuit for detection of horizontal sync pulses for use in high esolution digital processing of video data when low line-to-line registration uncertainty is required. The detector comprises three main parts, a negative peak detector, a proportioning amplifier and a high speed comparator for level detection. The peak detector allows a reference point to be established over a wide signal and temperature range with little error due to inherent accuracy and stability of the operational amplifier circuitry, and has an ability to adjust the triggering point of a comparator dependent upon video signal level.

Abstract: An externally powered automatic cannon comprises a receiver, a barrel conted to the receiver and having a bore with a rear end opening toward the receiver, a chamber member having a chamber for a propellant case movable in the chamber and a cam drum rotatable on the receiver and engaged with the chamber member for moving the chamber member from an operating position with the chamber aligned with the rear end of the bore, to a loading position with the chamber misaligned with the rear end of the bore and spaced therefrom. A projectile feeder with ram, rams a projectile into the now exposed rear end of the bore. At the same time a propellant case feeder with ram, rams a propellant casing to the opened chamber. Continued rotation of the cam drum returns the chamber member into its operating position at which time the propellant is ignited to propel the projectile down the barrel bore. The cycle is repeated with each rotation of the cam drum for rapid automatic firing of the cannon.

Abstract: A jointed conveyor for ammunition has an upstream and downstream conveying evice. Each of these devices has an upstream and downstream end. The conveying devices can operate to convey the ammunition from the downstream end of the upstream conveying device to the adjacent upstream end of the downstream conveying device. Both of the conveying devices are mounted to articulate, one with respect to the other, about their adjacent ends. Also included is an upstream and downstream curved guide mounted on the upstream and downstream conveying devices, respectively. The guides are positioned to move alongside each other as the conveying devices articulate into a predetermined position. The conveyor also has a linkage slidingly coupled to both of the guides.

Abstract: A multi-segmented radio frequency excited inductance coil sensor is operaely disposed on the muzzle end of a gun tube for the purpose of detecting the transverse displacement of a projectile from the center axis of the gun tube. The apparatus comprises a combination of sum and differencing amplifiers which combine detected signals into a form which can be used to compute the angle and magnitude of displacement.

Abstract: An automatic velocity delay circuit utilizes the output signal of a radio equency velocimeter for determining the time a projectile takes to pass a sensor located at the muzzle end of a gun. The circuit uses this time interval pulse and clocking pulses to provide an X-ray trigger pulse at the precise instant that the projectile passes an X-ray head located at a selected position along a parallel path of projectile travel, thus insuring a photographic record of the projectile in the muzzle blast region.

Abstract: A portable orbiting grinding machine to grind the gas check seat on 155 mm un tubes. The critical sealing surface is ground concentric with the chamber diameter. Instead of moving the gun tube to a specified machine tool, the portable grinding machine can be loaded on a specified tube for grinding the gas check seat then moved to the next tube to start the sequence again. A hydraulically expanded arbor grips the gun tube chamber diameter. An orbital spur gear assembly rotates on the expanding arbor extension and has a longitudinal travel on the extension controlled by a feed mechanism assembly. A removeable grinding quill is held by the spur gear assembly as it rotates. A sleeve type grinding wheel dresser assembly has a blade that may be mechanically actuated to bear against the grinding wheel and is spring loaded away from the grinding wheel when not in use.

Abstract: There is disclosed an electromechanical device which uses a digital depth ge micrometer with a probe in combination with a read-out voltmeter to provide automatically recordable profiles of impacted crater sections. The circuit electrically connected to the voltmeter has a Zener circuit which transposes the mechanical movement of the probe to readable and recordable electronic signal information. In one example of its use the recorded data refer to the profile of an exploded metallic crater formed by the impact of a shaped-charge ballistic warhead.

Abstract: The present invention provides transport apparatus for transporting and aculating an article into and out of a housing having limited access, and includes a lifting beam having a curved shape to which is attached a lifting assembly. A hoist device is connected to the lifting assembly for raising and lowering the entire transport apparatus and also includes a worm-drive assembly for moving the lifting assembly relative to the lifting beam to thereby articulate an article about a first axis. In addition, one end of the lifting beam includes a rotational mechanism which is connected to a second worm-drive assembly. Operation of the second worm-drive assembly allows the article to be rotated relative to the lifting beam which allows the article to be rotated relative to a second axis. The combined operations of hoisting and movement about the two axes allows the article to be articulated in any direction for insertion or removal from a housing having limited access.

Abstract: The present invention discloses a simplified firearm safety device for an en bolt type automatic firearm. The safety device includes operating means and an apparatus having a freely rotatable sear pivotally mounted at a base of the apparatus in an oblong slot and a safety pin in a defined position in the sear which prevents unintentional discharge and precludes safety engagement when the weapon is not properly charged. The relative movement of the pivot pin with respect to safety pin holes in the sear insure that the unintentional discharge is prevented as well as the weapon is fired only when it is properly charged.

Abstract: A bifunctional sensor is disclosed for an optical seeking system which utzes a single focussing lens arrangement for focussing light of two distinct wavelength ranges. A first detector for detecting light of the first wavelength range is provided nearest the lens system and transmits light of the second wavelength range. A second detector for detecting light of the second wavelength range is provided behind the first detector with a modulating apparatus for modulating the light of the second wavelength range before it reaches the second detector.

Abstract: The apparatus and method are designed to allow a projectile to be supported n an external air bearing and spun up to a desired spin rate. When the desired spin drive is disengaged the projectile reacts freely to the gyroscopic forces in three degrees of angular motion. Spin loss, coning angle and nutation motion are measured as they vary with time.

Abstract: Two sections of explosives are utilized in a shaped charged device to first accelerate liner material to high velocity and secondly to collapse the moving liner on a projectile's longitudinal axis to produce a high velocity jet and slug. The apparatus utilizes the principle of superposition of velocity generated by sequentially activated explosives to attain jet and slug velocities having greater ability to defeat armored targets.

Abstract: A welded stainless steel box of rectangular cross section having a water led flange and cover is used in conjunction with an evacuation system and a pressure regulated and flow controlled gas supply to convert a standard air fired laboratory muffle furnace to a reducing gas furnace. A porous metal water-cooled plug is used to safely burn off the vented gas.

Abstract: A compressed gas sampling device is shown which includes a pressure reducing orifice to permit collection of a gas sample at a low pressure. A filter cartridge is connected between a flow meter and a pressurized source for analysis and gas is passed through the cartridge for a predetermined period of time. The cartridge may then be analyzed by a laboratory to determine contaminants which may be present in the source gas under analysis.

Abstract: A low-profile survivable antenna suitable for military use is described. pite its small size, which might be one tenth of a wavelength, the antenna has reasonable transmission range for these applications. Very little operator attention is needed in use, since a special matching circuit within the antenna network enables effective impedance matching, over a 3:1 frequency range, without necessity of switching to different matching circuits over different frequency bands. By including resistive components along with other passive inductive or capacitive elements, the reactance of the single matching circuit is made to effectively compensate the antenna's impedance over the entire frequency range. The impedance of the circuit has a decreasing positive reactance which compensates for the decreasing negative reactance, with frequency, of the antenna.

Abstract: Apparatus and method are described for generating single droplets of fluid aterial in the 40 to 1100 micrometer range. A generator needle assembly is provided having a wire selected for insertion in the needle with critical push-fit clearance and a tapered ground pointed end having an acute included angle of less than 15 degrees. The plunger of the syringe is mechanically advanced while telescopically observing the droplet size. A pneumatic collet is used which air strips the droplet without turbulence to produce uniform sized single droplets without the inclusion of satellite droplets.

Abstract: The use of fabricated periodic piezoelectric structures fabricated from h resistivity semiconducting crystals in detecting millimeter waves in the GHz range is disclosed.