Class / Patent application number | Description | Number of patent applications / Date published |
102216000 | Including impact or inertia switch | 15 |
20080210115 | Fuze for a Projectile | 09-04-2008 |
20100071577 | AXIALLY COMPACT AND LOW-VOLUME MECHANICAL IGNITER FOR THERMAL BATTERIES AND THE LIKE - An inertial igniter for use with a thermal battery for producing power upon acceleration is provided. The inertial igniter including: a base; at least one member disposed on the base, the at least one member having a hole; a mass movable towards the base, the mass having a concave portion; a locking ball disposed in the hole in the at least one member and having a portion thereof disposed in the concave portion for preventing relative movement of the mass with the base when an acceleration time profile is below a predetermined threshold; and a biasing spring including a portion for preventing the locking ball from leaving the concave portion when the acceleration time profile is below the predetermined threshold and for allowing the locking ball to leave the concave portion when the acceleration time profile is below the predetermined threshold to unlock the mass and permit movement of the mass relative to the base. | 03-25-2010 |
20100242769 | Ammunition unit - An ammunition unit suitable for combat in urban terrain. The ammunition unit includes a warhead including a kinetic pre-cursor, a main charge, an impact sensor and an ignition system. A pre-charge is accommodated in the kinetic pre-cursor. The ignition of the pre-charge is controlled by the ignition system by introducing a time delay between a sensed impact and the ignition of the pre-charge and the ignition of the main charge is controlled by the ignition system by introducing a further time delay before ignition of the main charge. | 09-30-2010 |
20100307362 | Setback and Set-Forward Initiated Inertial Igniters and Activated Electrical Switches - A method of igniting one of a pyrotechnic material and primer during or after an all fire setback acceleration. The method including: positioning a mass element along an inclined surface; biasing the mass element in a direction into the inclined surface such that the mass element traverses the inclined surface upon the all fire setback acceleration against the biasing; drawing the mass element toward one of a pyrotechnic material and primer with the biasing after the mass element traverses the inclined surface. The method can further include delaying the drawing until the mass element experiences a set forward acceleration. The delaying can include drawing the mass element into a delay well after the mass element traverses the inclined surface and drawing the mass element across a delay wedge when the mass element experiences the set forward acceleration. | 12-09-2010 |
20100307363 | ULTRA-HIGH VELOCITY PROJECTILE IMPACT SENSOR - An apparatus for detecting the impact of an ultra-high velocity projectile includes: a projectile; at least one optical fiber attached to at least a first area of the projectile; a light source coupled to the optical fiber supplying light into the optical fiber; and a monitor coupled to optical fiber configured to monitor the light in one optical fiber and positioned in a second area of the projectile. A method for operating a circuit in response to a shockwave of ultra-high velocity, includes the steps of deploying at least one optical fiber in a first area in the path of an ultra-high velocity shockwave; coupling a light source to the optical fiber, the light source supplying a light into the optical fiber; and deploying a monitor coupled to the optical fiber to: monitor the light in the optical fiber to detect a change in the light; and positioned in a second area further along the path of the shockwave. | 12-09-2010 |
20120132097 | Compact Mechanical Inertia Igniters For Thermal Batteries and the Like - An inertial igniter for igniting a thermal battery upon a predetermined acceleration event is provided. The inertial igniter including: a base having a first projection; a striker mass rotatably connected to the base through a rotatable connection, the base having a second projection aligned with the first projection such that when the striker mass is rotated towards the base, the first projection impacts the second projection; and a rotation prevention mechanism for preventing impact of the first and second projections unless the predetermined acceleration event is experienced. | 05-31-2012 |
20130152811 | Impulse-Based Compact Mechanical G-Switch With Modular Design - A G-switch including: a base and posts, the posts having a hole; a locking ball with a portion disposed in the holes; a striker mass movably disposed relative to the posts and having a concave portion, wherein a portion of the locking balls is disposed the concave portion; a collar movable relative to the posts; a biasing element for biasing the collar in a position which retains the locking balls within the concave portions, the biasing element permitting movement of the collar to a position in which the locking balls are released from the concave portions to release the striker mass upon a predetermined acceleration profile; and a member on the striker mass and first and second electrically conductive contacts on a portion of the body, the first member opening or closing an electrical circuit between the first and second contacts upon release of the striker mass. | 06-20-2013 |
20130213252 | Inertial Delay Fuse - An inertial delay mechanism for use in an explosive projectile is provided. The delay mechanism consists of an inertial delay fuse that is precise, doesn't require sensitive primary explosives and doesn't utilize electronic circuitry. The inertial delay fuse includes a free sliding charge element that strikes an anvil located opposite to the sliding charge element. A delay gap is provided between the sliding charge element and the anvil. Upon impact, the sliding charge element slides forward and impacts the anvil, thereby inducing a shock wave in an initiator charge that subsequently results in detonation of main charges. The design is mechanically simple and robust enough to withstand severe g-loading forces that occur during firing and penetration of a projectile. | 08-22-2013 |
20130276657 | Multi-Stage Mechanisms For Event Detection and Initiation of Pyrotechnic Materials in Thermal Batteries and the Like in Munitions - A method for detecting a number of events having an acceleration profile greater than a predetermined threshold. The method including: detecting a number of events having the acceleration profile greater than the predetermined threshold; counting the number of events detected having the acceleration profile greater than the predetermined threshold; and outputting a mechanical or electrical signal based on whether the counted number of events having the acceleration profile greater than the predetermined threshold is greater than a predetermined number. | 10-24-2013 |
20130284044 | Rotary-Type Mechanisms for Inertial Igniters for Thermal Batteries and G-Switches for Munitions and the Like - A mechanism including: a toggle link rotatably connected to a base structure; a stop connected to the base structure for limiting a rotational travel of the toggle link; a biasing element having a first end attached to the base structure and a second end attached to the toggle link such that the toggle link is biased towards the stop when the toggle link is positioned on a first side of a singular position and the toggle link is biased towards an opposite direction from the stop when the toggle link is positioned on a second side of the singular position; and an inertial element movably disposed between the base structure and the toggle link such that that inertial element moves the toggle link from the first side of the singular position to the second side of the singular position when the base structure undergoes an acceleration event greater than a predetermined threshold. | 10-31-2013 |
20140013983 | Compact and Low-Volume Mechanical Igniter and Ignition Systems for Thermal Batteries and the Like - An ignition system for a thermal battery where the ignition system includes: a base plate for connection to the thermal battery; and two or more inertial igniters formed on the base plate, each of the two or more inertial igniters having a striker mass which ignites one or more pyrotechnic materials upon a predetermined acceleration profile, the base plate having an opening corresponding to each of the two or more inertial igniters for allowing a generated spark to pass into the thermal battery. | 01-16-2014 |
20140311369 | Mechanical Inertial Igniter With High-Height Drop Safety Feature For Thermal Batteries and the Like - A method for initiating a thermal battery including: releasing an engagement between an element and a striker mass upon an acceleration time and magnitude greater than a first threshold; and moving at least one member into a path of the element to prevent the element from releasing the striker mass only where the acceleration time and magnitude is greater than a second threshold, the second threshold being greater than the first threshold. | 10-23-2014 |
20150331008 | Piezoelectric-Based Multiple Impact Sensors and Their Electronic Circuitry - An electrical energy harvesting device for harvesting electrical energy from a pulsed impact loading event. The device including: a piezoelectric element configured to be loaded and unloaded to a first load level by the pulsed impact loading event; and a first inductor coupled to the piezoelectric element configured to be loaded and unloaded to a second load level by the pulsed impact loading event, wherein the piezoelectric element and the first inductor together operate as a first inductor/capacitor (LC) resonant circuit having a first resonance frequency and wherein the loading of the first inductor lags in time the loading of the piezoelectric element. | 11-19-2015 |
20160025473 | Electrical Setback Detection Switch - A switch including: a first body having holes located at a longitudinal position; a movable second body having a concavity corresponding to the holes; a retaining ball positioned in the holes and corresponding concavity for restraining the second body from movement relative to the first body; an elastic element disposed on the body; a mass disposed on the elastic element, the mass moving the elastic element upon an acceleration event; and first and second electrical contacts positioned on the body such that when the acceleration event has a predetermined magnitude and duration, the mass moves past the longitudinal position to permit the retaining ball from releasing from the holes, thereby permitting the second body to move towards the first and second electrical contacts; wherein the second body includes a conductive portion for closing an electrical circuit between the first and second electrical contacts. | 01-28-2016 |
20160025474 | METHOD FOR INITIATING THERMAL BATTERY HAVING HIGH-HEIGHT DROP SAFETY FEATURE - A method for initiating a thermal battery including: releasing an engagement between an element and a striker mass upon an acceleration time and magnitude greater than a first threshold; and moving at least one member into a path of the element to prevent the element from releasing the striker mass only where the acceleration time and magnitude is greater than a second threshold, the second threshold being greater than the first threshold. | 01-28-2016 |