US Government As Represented by the Secretary of the Army

Barry Schwartz

Jason R Cahayla

Lloyd Khuc

John Geaney

Olivier Nguyen

Gary Anthony Pacella

Stephen Redington

Jason Friedberg

Triet La

Robert P Bryan

A battery activation device uses ballistic pressure to directly activate a liquid reserve battery and simultaneously complete the battery ground circuit to the electronics system. The gas pressure generated during ballistic launch reacts upon a piston face that transforms the pressure directly into a linear force which is then applied to the liquid reserve battery for activation. An internal shear disc prevents unintentional battery activation from an accidental drop and if sufficient launch pressure has not been realized by device.

Pressure activated battery system

A setback switch device is provided which, upon launch, can arm an explosive or pyrotechnic device for military gun launched applications. An included bridgewire shunt feature can also prevent the unintended arming, or accidental arming by a stray voltage before any launch is undertaken, of such explosive or pyrotechnic device.

Bridgewire shunt setback switch

A computer program product corrects a detonation time from a ballistic table, based on the actual velocity of a projectile measured upon exit of the projectile from the gun tube. The computer program product transfers a 16-bit data stream, through a 16-bit to an 8-bit encoder, to a fuze controller implemented as an 8-bit platform, to provide precise timing adjustment to a fuze controller. The computer program product significantly improves the accuracy of detonation times for air burst mode. The encoder calculates the absolute truncated, square rooted, X, of the input time delay number, as well as the error correction number, Y. The encoder then transmits both numbers X and Y as an 8-bit data stream, optionally along with the parity data to the fuze controller.

Method for transferring 16-bit data through 8-bit devices

A stab type fuze mechanism, such as the 30 mm M759 fuze mechanism, which utilizes a generally horse shoe shaped configuration anti-setback spin clip initially lodged in a grove within the body of a target sensing probe, but extending partially therefrom, which extending part rests against a ledge within the aluminum o-give&#x2014;located rearward from the target sensing probe; thereby preventing the target sensing probe from moving rearward within the fuze during firing and setback. After firing, with the onset of spin, the anti-setback spin clip will open, expanding away from, out of, and clear of the grove and into a cylindrical channel in which the target sensing probe is lodged. Due to a thinned area at the apex of the clip, the expansion of the anti-setback spin clip will be a plastic deformation and the clip will remain expanded. With the expanded clip entirely clear of the grove&#x2014;when the cartridge impacts its target, either a hard target, or a soft target, the obstructed forward travel of the cartridge will force the target sensing probe rearwards to impact the firing pin located immediately rearward thereof; thereby, forcing the firing pin rearward and initiating the firing train of the fuze, and subsequently, igniting the secondary explosive within the cartridge to cause detonate thereof.

Anti-setback spin clip application

A target discrimination system monitors an acceleration switch signal to determine an impact of a projectile on a target. During a sample period of approximately 1.0 milliseconds, the system repeatedly samples the acceleration switch signal, compares the sampled acceleration sensor signal with a reference voltage, and sets a comparator data output to logic one if the sampled signal exceeds the reference voltage. Otherwise, the comparator data output is set to logic zero. The system counts the instances that comparator data output equals logic one during the sample period and executes a selected delay. The selected delay is approximately 50 milliseconds if the counted number of instances exceeds a predetermined threshold of approximately two-thirds of the samples and, otherwise, the selected delay is approximately 10 milliseconds. The selective delay enables target discrimination and selective detonation of a projectile.

System and method for electronically discriminating a target

A multi-mode fuze includes first and second microprocessors, the first microprocessor being connected to a resistor/capacitor oscillator and the second microprocessor being connected to a quartz crystal oscillator, the first and second microprocessors being connected to each other, the second microprocessor being operable to time calibrate the first microprocessor; a safe and arm device connected to the first microprocessor; power storage capacitors connected to the first microprocessor; a nose mounted impact switch connected to the first microprocessor; at least one impact delay circuit connected to the first microprocessor; and at least one acceleration switch connected to the first microprocessor.

Multi-mode fuze

A fuze explosive train device for detonating a munition that uses a stab firing pin within a pressure cartridge, with the stab firing pin located between a gas generator and a stab detonator. The firing pin is capable of transferring an energy from the gas generator into the stab detonator in a manner that initiates the stab detonator to a high order explosive reaction. A method of initiating a stab detonator using a stab firing pin also is disclosed.

Growing community of inventors

Newton, NJ, United States of America

Barry Schwartz