Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7992495 | Detonation of explosives A chemical detonator includes a housing, having an open end and a closed end; and a detonation element located in the housing, into which a shock tube for initiating the detonation element intrudes, wherein the housing and the shock tube are of plastics construction... | 08/09/2011 |
| 7360487 | Connector for perforating gun tandem A perforating gun connector comprising a first and second section connected together on one end. The two sections of the perforating gun connector that couple together are correspondingly tapered so that one end of one connector is tapered and fits into the correspo... | 04/22/2008 |
| 7188566 | Non-electric detonator A detonator (10) has a constant-diameter shell (12) which has a significantly higher shell length-to-diameter (outside diameter) ratio than prior art detonators. The shell (12) is configured to hold an explosive output charge (18) which i... | 03/13/2007 |
| 7174832 | Logging of detonator usage A system for logging authorized detonator usage of identifiable detonators, after removal of the detonators from a controlled store, in which the system includes an inventory control for maintaining an inventory of detonators at the controlled store, and also data c... | 02/13/2007 |
| 7056401 | Priming mixture for cartridge primers for small firearms A priming mixture comprises aluminium silicate as the sensitizer, advantageously in a percentage higher than 10%, not exceeding 30% and preferably included between 15% and 25%. Combined with said sensitizer, the-mixture may further comprises a potassium compound, pr... | 06/06/2006 |
| 7051655 | Low-energy optical detonator The invention relates to an optical detonator comprising a secondary explosive disposed in a cavity, an optical fiber having one end connected to a source of laser radiation, and a focusing optical interface situated between the other end of the optical fiber and th... | 05/30/2006 |
| 6966260 | Clip-on device for coupling an electric match to a pyrotechnic fuse There is provided a molded polymeric coupling device incorporating integral hinges, latches and strain-relief features adapted to receive an electric match having a protective chamber, and a quickmatch fuse of a pyrotechnic device. After the quickmatch fuse is suita... | 11/22/2005 |
| 6739265 | Explosive device with assembled segments and related methods A segmented explosive device capable of producing a shock wave front upon being exploded by a detonation impulse generated by a selectively operable control device and communicated to the explosive device by a transmission line coupled between the control device and... | 05/25/2004 |
| 6561101 | Explosive delay assembly An explosive delay assembly including a housing, the housing includes a continuous elongated sidewall surrounding a region bounded at one end by a top surface, the top surface including an aperture configured for accepting an end booster where the end boo... | 05/13/2003 |
| 6539869 | Heat transfer initiator A non-detonating heat transfer initiator. A representative heat transfer initiator is in the form of a heat transfer control medium, having a heat input portion and a heat output portion, and a non-detonating autoignition material, having an autoignition ... | 04/01/2003 |
| 6408765 | Door breaching device with safety adapter A breaching device for controlled blasting of an object at short range includes a blasting element including an explosive charge contained within a housing, the blasting element being configured to blast the object from a preset distance. Connected to, an... | 06/25/2002 |
| 6374740 | Two-stage optical detonator with shock-detonation transition A first stage of a shock-detonation transition type two-stage optical detonator contains a pyrotechnic substance and an optical fiber, one end of which is connected to a source of laser radiation. The first stage pyrotechnic substance is separated from a ... | 04/23/2002 |
| 6305287 | Low-energy shock tube connector system A shock tube connector system comprises a substantially cylindrical detonator having a longitudinal axis a block body receiving the detonator therein, and an end cap. The detonator includes an axisymmetric exterior shell including a cylindrical main secti... | 10/23/2001 |
| 6298784 | Heat transfer delay A heat transfer delay for providing a delay time in propellant, pyrotechnic, and explosive devices, and a method of delaying production of a non-detonating thermal output with the heat transfer delay. A representative delay is in the form of a housing hav... | 10/09/2001 |
| 6244185 | Skyrocket A skyrocket is provided which provides a first fireworks effect prior to launch as well as a second effect after launching. The skyrocket includes a body which houses or is coupled to a rocket motor, a first effect and a second effect. A transparent or tr... | 06/12/2001 |
| 6227116 | Pyrotechnical charge for detonators A detonator comprising a shell with a secondary explosive base charge, igniting means and an intermediate pyrotechnical train, said train comprising a novel ignition composition with a specific redox-pair of a metal fuel and a metal oxide oxidant, said fu... | 05/08/2001 |
| 5945627 | Detonators comprising a high energy pyrotechnic In-hole and surface detonators are provided which are essentially free from primary explosives. The detonators utilize a high energy pyrotechnic mixture of a fuel and an oxidizer for initiation of a base charge enclosed in the detonator, or for the initia... | 08/31/1999 |
| 5524547 | Signal tube and detonator cord connector The present invention is directed to an improved connector comprising a first and second holding means for pressure fitting a detonating cord and shock tube in a substantially orthogonal pressure fitting relationship.... | 06/11/1996 |
| 5515784 | Signal transmission devices and detonation systems using the same Signal transmission devices contain within a housing (12) at least a pair of signal transmission lines, e.g., signal transmission tubes (16, 18) having respective tube ends (16a, 18a) disposed within the housing to provide at least one input tube and at l... | 05/14/1996 |
| 5501151 | Alternate signal path isolation member and non-electric detonator cap including the same An isolation member (34) for use in a non-electric detonator cap (10) is of substantially cylindrical shape and has an interior passageway (40) extending therethrough and defining a positioning region (44) and a discharge port (56). Positioning region (44... | 03/26/1996 |
| 5413046 | Shock tube assembly A signal transmission tube assembly includes a signal transmission tube, such as a coil of shock tube on a spool, having opposite terminal ends and containing a reactive material. The open terminal ends of the shock tube provide the sole exits for the sig... | 05/09/1995 |
| 5398611 | Low energy blasting initiation system, method and surface connection therefor A low-energy blasting initiation system, method and surface connection is disclosed for low-noise, time controlled transmission of an initiation signal from a signal initiation source to a plurality of remote blasting elements. A connector block of the sy... | 03/21/1995 |
| 5386780 | Method and apparatus for extended time delay of the detonation of a downhole explosive assembly A method and apparatus adapted to provide a time delay between the hydraulic actuation of the firing head assembly by fluid pressure and the detonation of a downhole explosive device used in subterranean wells, such as a perforating gun. In a preferred em... | 02/07/1995 |
| 5327835 | Detonation device including coupling means A coupling device (10) for coupling a detonator cap (22a, 22b) with a detonating cord (82) features a sleeve member (12) having a longitudinal bore (18) extending therethrough for receiving a detonator cap (22a, 22b) in one end and a detonating cord (82) ... | 07/12/1994 |
| 5147476 | Delay composition and device A delay device or detonator contains a delay composition comprising a consolidated, particulate mixture of silicon and a suitable oxidant, and a minor effective proportion of dispersed metal compound intimately incorporated therewith to serve as a reactio... | 09/15/1992 |
| 5147976 | Ignition system for a pyrotechnic composition The ignition system according to the invention comprises an ignition relay (4), placed in a housing (3), and which is in contact with the pyrotechnic composition (2). It is characterized in that the housing (3) is closed by a lattice (5) in contact with a... | 09/15/1992 |
| 5125335 | Fuse element, preferably with long delay period and method for producing the same In fuse elements of layered structure with long delay times, misfires, occur, above all, if aggravating secondary conditions prevail (such as, for example, high projectile rotation and/or temperature stresses and shock stresses). The safe progression of t... | 06/30/1992 |
| 5054396 | Fuse element, preferably with long delay period and method for producing the same In fuse elements of layered structure with long delay times, misfires, occur, above all, if aggravating secondary conditions prevail (such as, for example, high projectile rotation and/or temperature stresses and shock stresses). The safe progression of t... | 10/08/1991 |
| 5048420 | Low energy fuse In the field of blasting, an improvement in means for transmitting an initiating signal (non-electrically) to an explosive device to remotely detonate same in accordance with a predetermined delay period of the type which comprises tubing in which there i... | 09/17/1991 |
| 5012741 | Initiator for a transmission tube A transmission tube initiator comprises a body having a passageway formed therein for receiving and retaining an initiator charge. A holder holds a side of a transmission tube in close proximity to the charge. The charge provides an initiation signal whic... | 05/07/1991 |
| 5001981 | Signal transmission tube for initiation of explosives A plurality of discrete transmission tubes are held in axially extending juxtaposed relation by an outer sheath which coextensively covers the tubes. An axially extending line of weakness is formed along the length of the sheath. The transmission tubes ma... | 03/26/1991 |
| 4976201 | Non-lethal distraction device A distraction device is comprised of a hollow container that is divided into a first chamber and a second chamber. An explosive charge capable of producing a loud sound and a brilliant flash of light fills the second chamber. A standard M201 hand grenade ... | 12/11/1990 |
| 4911076 | Time delay replay A detonating delay relay for shock or signal tube application so made as to be bidirectional. Comprising a delay detonator having a plug which holds two lengths of shock tube sealed at the ends. The detonation pulse is transmitted from one length of shock... | 03/27/1990 |
| 4903604 | Ignition transfer medium An ignition transfer medium for interconnecting the ignition and pyrotechnic stages of a pyrotechnic device comprises activated fibrous carbon, such as activated charcoal cloth, on which an inorganic oxidizer and possibly other substances have been deposi... | 02/27/1990 |
| 4841856 | Pyrotechnical delay elements for delayed-action fuse and uses thereof A miniaturized delay element was developed for use in medium-and large caliber weapon systems and is realized in a metallic cartridge made of a copper-free light metal. By including a metallic combustible, an oxidant consisting of a halogen-containing hig... | 06/27/1989 |
| 4821645 | Multi-directional signal transmission in a blast initiation system The invention provides a connector, a transmitter, a bi-directional device, and a method for increasing the reliability of borehole detonation by using the connectors and transmitters provided by the invention. The invention provides connectors, each conn... | 04/18/1989 |
| 4799428 | Explosive primer unit for instantaneous initiation by low-energy detonating cord An explosive primer unit adapted to be initiated instantaneously by low energy detonating cord when the unit comprises an explosive primer and an explosive coupler which operatively joins the low energy detonating cord to the primer.... | 01/24/1989 |
| 4796533 | Primer assembly A primer assembly for use in the non-electric initiation of cap-insensitive explosives, especially of deck-loaded explosive charges by means of a single downline of low-energy detonating cord (LEDC), includes a percussion-actuated detonator seated in a ca... | 01/10/1989 |
| 4776275 | Pyrotechnical delay composition In order to achieve a delay time as constant as possible, an interspace is provided between a pyrotechnic delay composition and the delay tubule.... | 10/11/1988 |
| 4756250 | Non-electric and non-explosive time delay fuse Non-electric and non-explosive fuse-like initiating device which makes use of a process of propagation of a gaseous plasma generated by deflagration of a pyrotechnic material deposited as a layer on the inner surface of a supporting duct, employing transf... | 07/12/1988 |
