156results about "Ignitors" patented technology

The present invention relates to an igniter composition which is capable of being extruded to yield a robust igniter extrudate. The composition is particularly useful in the form of an igniter stick or other selected geometry for use in supplemental safety restraint systems designed for use such as in vehicles, ground or airborne, having such systems.

The present invention relates to flares and other solid propellant devices, rockets or the like, equipped with an igniter or igniter system which is based in whole in part on an extruded igniter stick.

An electronic firing system may include a first firing circuit and a second firing circuit. A detection system operatively associated with the first and second firing circuits detects whether a device to be fired is connected one of the first and second firing circuits. The electronic firing system actuates either of said first and second firing circuits to which is connected the device to be fired.

A spontaneous firing explosive composition for use in a gas generator for an airbag containing a fuel, an oxidizer, a combustion modifier, and a binder.

A bi-propellant injector (66) includes a first injector element (68) and a second injector element (70) injecting a first propellant (69) and a second propellant (71), respectively, into a combustion chamber (53). A flame-holding zone igniter (74) is adjacent to and ignites recirculation of at least a portion of the first propellant (69) and at least a portion of the second propellant (71) within a flame-holding zone (76).

Mixtures of high explosives with materials that readily absorb microwaves ignite more readily when exposed to microwave energy than the corresponding neat explosives. A charge of HMX (0.5 gram) mixed with carbon nanotubes (1 percent by mass) ignited with 7.5 joules at an average rate of 750 W for 10 milliseconds. To raise a charge of the same mass of neat HMX to an autoignition temperature of 200 degrees Celsius would require much more energy (about 110 joules) for a longer duration (about 150 milliseconds).

A gas generating system includes a housing, a quantity of gas generant material positioned within the housing, and a quantity of booster material positioned in the housing spaced apart from the gas generant. A movable first screen is positioned in the housing such that the booster material is on a first side of the screen and the gas generant material is on a second side of the screen opposite the first side of the screen. The screen is structured to enable fluid communication between the first and second sides of the screen.

A pyrotechnic initiator with enclosed on-board control circuitry, and a mating connector therefor.

A sub-caliber bullet with an aerodynamic shape has long-range accuracy due to a high muzzle velocity and reduced time of flight to a target. The bullet has a forward portion, a mid-portion and an aft portion. The forward portion has a density in excess of 10/cm³ while the mid-portion has a lower density. The bullet has an aspect ratio of at least 5:1 and a diameter, d, that satisfies a Power Law equation:

d=D*(x/L)ⁿ

where D is a maximum bullet diameter, L is the length, x is a distance rearward from a nose of the bullet and n is a Power Law exponent that is between 0.5 and 0.75. In some embodiments, a blind bore extends into the mid-portion from the aft portion and a sustainer propellant within the blind bore ignites as the bullet exits a gun muzzle to provide a velocity boost and to overcome aerodynamic drag.

A versatile cavity actuator. The versatile cavity actuator includes a cavity having one or more polymer-based sidewalls. An energetic material is disposed therein. A heater is disposed on or within the cavity. In a specific embodiment, the cavity includes a thermally insulating base positioned beneath the heater, which is positioned near the bottom of the cavity. The polymer-based sidewalls are constructed from a photo-curable epoxy, which is disposed on a substrate via microelectromechanical processes. The sidewalls are angled or parabolic and are constructed via a low-temperature lithographic spin process compatible with post integrated circuit processing.

A method for determining the optimum inlet geometry of a liquid rocket engine swirl injector includes obtaining a throttleable level phase value, volume flow rate, chamber pressure, liquid propellant density, inlet injector pressure, desired target spray angle and desired target optimum delta pressure value between an inlet and a chamber for a plurality of engine stages. The tangential inlet area for each throttleable stage is calculated. The correlation between the tangential inlet areas and delta pressure values is used to calculate the spring displacement and variable inlet geometry. An injector designed using the method includes a plurality of geometrically calculated tangential inlets in an injection tube; an injection tube cap with a plurality of inlet slots slidably engages the injection tube. A pressure differential across the injector element causes the cap to slide along the injection tube and variably align the inlet slots with the tangential inlets.

An energetic material comprising an elemental fuel, an oxidizer or other element, and a carbon nanofiller or carbon fiber rods, where the carbon nanofiller or carbon fiber rods are substantially homogeneously dispersed in the energetic material. Methods of tailoring the electrostatic discharge sensitivity of an energetic material are also disclosed. Energetic materials including the elemental fuel, the oxidizer or other element, and an additive are also disclosed, as are methods of reducing ignition sensitivity of the energetic material including the additive. The additive is combined with the elemental fuel and a metal oxide to form the energetic material. The energetic material is heated at a slow rate to render inert the energetic material to ignition while the energetic material remains ignitable when heated at a fast rate.

The invention provides a bridge type igniter adopting a multi-layer energetic film, and belongs to the field of initiating explosive device production. The igniter comprises a ceramic substrate, a B/Ti, CuO/Al or Ni/Al multi-layer energetic film, a TaN ignition film bridge arranged between the middle part of the substrate and the multi-layer energetic film, and electrodes arranged on upper surfaces at two sides of the TaN ignition film bridge. According to the igniter, the TaN ignition film bridge especially for the ignition reaction of the energetic film is arranged between the substrate and the multi-layer energetic film, the multi-layer energetic film can be ignited by utilizing the TaN ignition film bridge under the action of ignition current of about 3.0A, so that the multi-layer energetic film can react to produce mass heat to ignite gunpowder, fuel or fire charge. Therefore, the bridge type igniter has the characteristics that the igniter is minimized, small-current electricity is adopted to be matched with a large-area multi-layer energetic film, heat energy required by ignition can be effectively improved by utilizing electric energy and chemical energy, the safety and reliability of ignition can be improved, and the igniter is good in consistence and performance stability, is advantageous to batch production, high in production efficiency, low in cost, and convenient to transport and store.