Class 73/35.15 - By time measurement (e.g., burning rate, detonation velocity)

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the explosion produces a traveling
No. of patents: 21
Last issue date: 05/13/2008

Number	Title	Issue Date
7370513	System and method for monitoring features of a blast A method of monitoring a feature of a blast such as velocity of detonation (VOD) comprises the steps of providing a detonator 16.1 at a blast site 12. Prior to the blast, a blast control signal path 20, 18.1 is utilized to communicate blast cont...	05/13/2008
7328677	Plasma-jet spark plug and ignition system A plasma-jet spark plug includes a metal shell, an electrical insulator retained in the metal shell, a center electrode held in an axial hole of the electrical insulator to define a cavity by a front end face of the center electrode and an inner circumferential surf...	02/12/2008
7305954	Plasma-jet spark plug and ignition system A plasma-jet spark plug includes a metal shell, an electrical insulator retained in the metal shell, a center electrode held in an axial hole of the electrical insulator to define a cavity by a front end face of the center electrode and an inner circumferential surf...	12/11/2007
7225740	Electromagnetic pulse transmitting system and method A plasma antenna generator includes an ionizable material, an explosive charge capable of projecting the ionizable material upon detonation, and a detonator coupled with the explosive charge. An electromagnetic pulse transmitting system includes an electromagnetic p...	06/05/2007
6987459	Portable combustible gas detector A portable detector of combustible or explosive gases incorporates a polymeric-type sensor or sensor array coupled to a programmed processor which carries out an evaluation of one or more signals from the sensor or array to evaluate the presence of combustible or ex...	01/17/2006
6957566	Measuring in-situ MDF velocity of detonation A system for determining the velocity of detonation of a mild detonation fuse mounted on the surface of a device includes placing the device in a predetermined position with respect to an apparatus that carries a couple of sensors that sense the passage of a detonat...	10/25/2005
6873945	Rocket motor propellant temperature simulator The present invention comprises a device which is inert and “thermally-equivalent” to actual ordnance. The device can travel with live ordnance and track the propellant temperatures in order to get a more precise propellant temperature for the ordnance. The devi...	03/29/2005
6773674	Thermal analysis for detection and identification of explosives and other controlled substances The invention features methods and systems for detecting the presence of an energetic material in a sample in which the presence of the energetic material is unknown. The method includes the steps of: heating the sample; measuring heat flow between the sample and it...	08/10/2004
6644111	Apparatus and method for measuring exit velocity of a gun round An apparatus for measuring exit velocity of a round from a muzzle of a gun barrel includes a first optical fiber having a first fiber optic Bragg grating (FBG) circumferentially attached to the gun barrel at the muzzle and a second FBG circumferentially a...	11/11/2003
6192741	System for sled-track testing of explosive missiles In the improved system for sled-track testing of explosive missiles having tandem warheads and crush switches, time delay boards are placed on the sled to operate in conjunction with the crush switches to detonate the tip charge and the main warhead. The ...	02/27/2001
5844126	Method and device for determining the speed of propagation of a temperature wave front in a gas The propagation of a temperature wave front in an enclosed space containing a gas features the measurement of the time which elapses between the passage of a temperature wave front past two thermionic probes 5, 6 mounted on the wall 4 of an enclosed space...	12/01/1998
4815315	Process for assessing the effect of propellant strain on propellant burn rate The present invention describes a process for relating burn rate in a sample propellant to a strain field imposed therein by bending the sample propellant by a determined amount. The propellant is cast upon an initially flat plate having a single pair of ...	03/28/1989
4554823	Method for burning rate characterization of solid propellants A method for determining the burning rate of a propellant. The method involves the single firing of a subscale, propellant motor that has been modified so that the propellant motor has a tapered cylindrical port that produces a non-neutral pressure-time t...	11/26/1985
4476710	Detonation transfer evaluation technique In order to evaluate competing explosive trains at explosive interfaces, at least one penalty barrier is inserted in the gap between a donor explosive component and an acceptor explosive component. Each of the barriers, if more than one, has a first layer...	10/16/1984
4434655	Black powder flamespread tester A black powder flamespread tester is disclosed in which powder to be qualed is packed in a sample tube provided with a plurality of sight holes. Light sensors are disposed adjacent each sight hole and emit signals upon flame front passage of the sight ho...	03/06/1984
4430885	Apparatus for determining the burn rate of uncured propellant A closed vessel apparatus for rapidly determining the burning rate of uncd propellant. Apparatus includes a closed vessel enclosing a propellant in a holder. An ignition wire is mounted in the vessel for igniting the propellant. A pressure transducer is ...	02/14/1984
4409821	Solid propellant measurement system An apparatus for measuring the burning rate of solid propellants utilizes a homodyne radar to illuminate the propellant grain from a non-burning surface to obtain a distance measurement of the dimensions of the burning mass....	10/18/1983
4379401	System for measuring plate deformation produced by explosive shock waves, and motion-sensing accelerometer transducer used therein A novel testing system utilizing a novel subcombination multiple pin/probe ype, motion-sensing accelerometer transducer, capable of sensing exceptionally high levels of structural motion, in the domain of from about 1,000,000 to 10,000,000 Gs (force of gra...	04/12/1983
4375168	Apparatus for low g-level vibrational pulse detection Apparatus is provided for monitoring vibrational activity proximate to a rce of mechanical vibration. The apparatus includes a bridge rectifier which may be positioned proximate to the source, and which provides a voltage output when the source generates...	03/01/1983
4140004	Apparatus for determining the explosion limits of a flammable gas An apparatus for determining the explosion limits of flammable gases having a combustion chamber, a conduit leading to the combustion chamber for conveying the sample stream of gas, a temperature control for maintaining the gas in the combustion chamber a...	02/20/1979
4130011	Flared sonic end nozzle velocity coupling test burner A flared sonic end nozzle velocity coupling test burner having a body, the walls of which define a chamber. The chamber is closed at one end thereof and has a flared sonic nozzle at the other end. Tests are performed for determining velocity coupling resp...	12/19/1978

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Class 73/35.15 - By time measurement (e.g., burning rate, detonation velocity)