Abstract:
A detonator junction for use in a blasting network is disclosed. A body of the detonator junction includes a chamber for receiving a detonator. A retaining member, attached to the body, creates a slot for retaining one or more transmission lines proximate an explosive output region of a detonator disposed in the chamber. A limiting member, attached to the retaining member, traverses an imaginary longitudinal extension of the slot and limits inadvertent removal of transmission lines from the slot. A clip may interlock with the detonator, which in turn may be locked into the chamber to ensure secure and proper placement of the detonator in the chamber. When the detonator is activated a transmission signal is initiated in transmission lines disposed within the slot.
Abstract:
The present invention is a signal transmission system (10) that can receive a non-electric input signal such as a mechanical shock, detonation, or pyrotechnic signal at an input terminus (12), convert that signal to an electrical signal, and convey the electrical signal to at least one output terminus (16a, 16b) at a remote location where the signal is converted to a non-electric output. To convert the non-electric input signal to an electrical signal, the input terminus (12) comprises a receiving transducer e.g., a piezoelectric, electrochemical, or photovoltaic element. The input terminus (12) is connected by transfer wiring (14) (e.g., an electrical wire harness or a flex cable) to the remote location, where it is received by the at least one output terminus (16a, 16b) and there converted to a non-electric signal that is used for a desired function. The length of the transfer wiring (14), and therefore the distance from the input terminus (12) to the remote location, can be from less than one inch to greater than 100 feet. Optionally, the transfer wiring (14) can connect the input terminus (12) to a plurality of output termini (16a, 16b). Also optionally, an output terminus may comprise an explosive bridge element (SCB, hot bridge wire, exploding foil) which can be initiated by the electrical signal, and the bridge element may initiate a brisant output charge (explosive or pyrotechnic). Alternatively, the output terminus may comprise an output transducer, e.g., a piezoelectric transducer, to convert the electrical signal into a physical pulse.
Abstract:
A shock tube connector system comprises a substantially cylindrical detonator (B) having a longitudinal axis (15), a block body (A) receiving the detonator (B) therein, and an end cap (C). The detonator (A) includes an axisymmetric exterior shell including a cylindrical main section (10), a cylindrical explosive end portion (12) having a diameter less than the diameter of the main section (10), and a transition portion (14) connecting the main section (10) and the explosive end portion (12) of the shell. An explosive charge is contained within the explosive end portion (12) of the shell and is distributed along the longitudinal length of the explosive end portion (12). The explosive charge preferable comprises two portions (62A, 62B) of lead azide or a first charge portion (72A, 74) of lead azide and PETN and a second charge portion (72B) of PETN. An initiating shock tube (16) is operatively connected to the explosive charge via a delay element (65, 75). The block body (A) includes a housing (20) within which the main section (10) of the detonator (B) is received. A tube holder (30) connected to one end (27) of the housing (20) includes a base member (32) having a bore within which the explosive end portion (12) of the detonator (B) is received. The tube holder (30) is T-shaped and includes a pair of engaging flanges (36) spaced from the base member (32) on laterally opposite sides of the base member (32) to define therebetween pair of engaging slots (38) extending parallel to the longitudinal axis (15) of the detonator (B) and alongside the explosive end (12) of the detonator (B) received in the bore. Each engaging slot (38) is adapted to frictionally grip at least four shock tubes (D) alongside the explosive end (12) of the detonator (B) with the longitudinal axes of the shock tubes (D) substantially orthogonal to the longitudinal axis (15) of the detonator (B). The end cap (C) is connected to the other end of the housing (20) and secures the detonator (B) within the block body (A).
Abstract:
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. The extruded igniter stick is formed from constituents comprising a water-soluble or water-swellable binder, at least one oxidizing agent, at least one fuel, and optionally, fibers.
Abstract:
This invention relates to a blast initiation assembly (10) including a length of shock tube (20), and lengths of safety cord (18) (22) which provide a time delay for propagating an explosives reaction. The assembly (10) includes one length of shock tube (20) with a first length of safety cord (18) connected to one end thereof, and a second length of safety cord (22) connected to the other end thereof. A detonator (12) for detonating an explosives composition is attached to the end of the first length of safety cord (18), and a detonator (28) with a clip (32) attached thereto is attached to the second length of safety cord (22). The first and second lengths of safety cord are selected to provide a required time delay. The clip (32) is arranged is for clipping to a length of shock tube on a similar blast initiation assembly, to join assemblies for sequential rock blasting.
Abstract:
A method for reducing the amount of NOx generating on the burning of a gas-generating agent for an air bag which comprises burning simultaneously two or more types of gas-generating agents having different oxygen balances. The amount of NOx is reduced through the reaction of an oxidizing gas and a reducing gas. The employment of the method according to the invention reduces the amount of NOx generating on the burning of a gas-generating agent for an air bag, which results in the reduction of the probability for the use of an air bag to affect adversely the health of an occupant, and thus in improvement of the safety and reliability of an inflator system.
Abstract:
The present invention is a portable, contained, fueled, ready-to-use campfire assembly (1) having a fire resistant container (2) with an upwardly facing mouth (8) that is narrower in diameter then its base. The container (2) is filled with a wick assembly (5), a mixture of mineral spirits, paraffin wax and optionally hardwood chips. No additional fuel, mixing, pouring, or lighting is required. A long lasting fire is provided that resists moderate winds, is readily extinguished by included lid means (12) and does not give out dangerous sparks.
Abstract:
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 igniter composition is formulated from constituents comprising a water-soluble or water-swellable binder, at least one oxidizing agent, at least one fuel, and, optionally, fibers.
Abstract:
L'invention concerne un tube allumeur constitué d'un tube combustible sur la face interne duquel un chargement d'allumage est déposé dans la longueur dudit tube combustible. L'invention concerne également un procédé de préparation du tube allumeur.
Abstract:
A gas-impermeable sealer element (24, 124) for a detonator or other explosive initiation device includes a non-reactive sleeve (26, 126) having a channel (28, 128) formed therein. A reactive material strip (30, 130) is sealed within the channel for transmission of an explosive's initiation signal through the sealer element (24, 124), either alone or in cooperation with transfer charges located at the input and/or output end of the non-reactive sleeve (26, 126). The reactive material strip (30, 130) comprises a reactive metal wire or other substrate (34) having on one or both sides thereof a layer of reactive material (30, 130, 36), either reactive metal foils which react exothermically when ignited, or a deposited fuel-oxidizer reactive material. The reactive materials, upon being energized, react exothermically in the absence of atmospheric oxygen or other extraneous oxidizer and so may be encapsulated, sealed or otherwise isolated from the atmosphere in use.