公开(公告)号：US11501982B1

公开(公告)日：2022-11-15

申请号：US17458765

申请日：2021-08-27

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： Stephen Redington ,  Christopher Macrae ,  Matthew Sargent

IPC: H01L21/60 ,  H01L23/00 ,  H01L25/00 ,  H01L25/065

Abstract: A circuit assembly with an electrical connection between two individual Printed Circuit Boards (PCBs) or Circuit Card Assemblies (CCAs) that are vertically stacked with a connection formed entirely of solder and with a gap in between surfaces that components may occupy. Coalescing solder paste merges between the surfaces when it is in a liquid state to form a solder bridge. The resultant assembly can be encapsulated to form a solid monolithic electronic assembly to improve robustness and allow the assembly to better withstand compressive forces.

公开(公告)号：US10415942B1

公开(公告)日：2019-09-17

申请号：US15875133

申请日：2018-01-19

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： Stephen Redington ,  Gregory Burke ,  John Hirlinger

IPC: F42C19/08 ,  F42B5/08 ,  F42B5/28 ,  B23K1/00

Abstract: An ammunition cartridge for a gun is optically initiated by a mechanism wholly within the cartridge case itself. The case has as optical primer initiation means producing light fluence to ignite a primer, which ignited primer may in turn ignite into a flashtube, and which ignited flashtube may in turn ignite a bed of propellant in said cartridge. The optical primer initiation means may be an LED, a laser diode, a VCSEL, or some other light emitting device in general. The cartridge optically initiated primer package is so sized and made electrically and mechanically seamlessly physically compatible with current ammunition cartridges such that these new cartridges are completely interchangeable. If the cartridge primer initiation means is of a percussion type, the cartridge is adapted to include an in-line piezoelectric crystal so that electrical power will be generated when the cartridge assembly is struck by a firing pin during percussion type operations; the power is then used to initiate the light emitting device.

公开(公告)号：US11536551B1

公开(公告)日：2022-12-27

申请号：US17458789

申请日：2021-08-27

Applicant: U.S. Government as Represented by the Secretary of the Army

Inventor： Stephen Redington ,  John Hirlinger ,  Gregory Burke

IPC: F42C19/12 ,  H01S5/0233

Abstract: A laser ignition assembly comprises first and second mounting surfaces opposed to each other. A central cavity is formed through the surfaces and sized to receive energetic material therein. A vertical solder bridge is formed between the surfaces and an edge emitting laser diode disposed between the surfaces. The laser diode is oriented such that a light fluence therefrom is directed in a radial direction into the central cavity. The surfaces can be circuit boards, e.g., copper clad, rigid circuit boards, and have an annular shape. The central cavity can be further defined by an interboard gap between the surfaces. The ignition assembly can fit within a primer cup of a munition.