Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8122756 | Narcotics and explosives particle removal system An explosive and narcotics detection system detects the presence of trace particles of those materials that are adhering to surfaces. The particles are removed from the surface, transported and collected in a particle collection medium, and then provided to detectio... | 02/28/2012 |
| 8065903 | Impact energy absorber for underwater applications An energy absorber comprises at least one layer of energy absorbing material, each layer having a plurality of cells within the respective layer of energy absorbing material, wherein each layer of energy absorbing material deforms when a force applied to the at leas... | 11/29/2011 |
| 7946149 | Explosive pulse testing of protective specimens A transducer is fixedly positioned within a supporting frame, covered by a shield in underlying relation to an enclosure within which explosion pulses are generated for testing purposes. The explosion pulses are profiled during emergence thereof through an aperture ... | 05/24/2011 |
| 7942032 | Method for detecting impact damage in a structure A method of detecting impact damage of a structure having a first surface exposed to potential impacts from an object comprises providing a sensor having a body portion that has a surface provided with an elongated channel. The sensor is fixed to a second surface of... | 05/17/2011 |
| 7861573 | Laser shock induced spallation Laser shock methods and systems are disclosed for evaluating impact resistance of materials, and for simulating and evaluating threshold conditions where damage may occur. ... | 01/04/2011 |
| 7430500 | Method and device for numerical analysis of flow field of incompressible viscous fluid, directly using V-CAD data A method including: a dividing step (A) of dividing external data into a plurality of cells (13) having boundaries orthogonal to each other, the external data including boundary data of an object which contacts incompressible viscous fluid; a cell classifying... | 09/30/2008 |
| 7426879 | Inspection method and inspection apparatus of reinforced concrete pipe Deterioration of reinforced concrete pipes is checked and the deterioration progress level is classified. Based on the inspection result, a portion to be inspected in detail in an inspection area is selected. With respect to the selected portion to be inspected in d... | 09/23/2008 |
| 7409848 | Apparatus and method for bulge testing an article An apparatus (10) for bulge testing an article (12) comprises a pressure vessel (14) arranged to define a chamber (15), the pressure vessel (14) has a first aperture (28) and a second aperture (30), means to pressuriz... | 08/12/2008 |
| 7398698 | Smart repair patch and associated method A system and method for identifying defects in a repair patch applied to a structure are provided. The system includes a sheet of material configured to be attached to the structure, and a mechanism operable to generate stress waves within and along the sheet of mat... | 07/15/2008 |
| 7392688 | Liquid reaction mass for high-G simulation An apparatus for simulating a dynamic high-g environment that includes a test specimen, an incompressible liquid situated adjacent to the test specimen, and a device for creating a dynamic force on the test specimen. In one embodiment, the device for creating a dyna... | 07/01/2008 |
| 7380437 | Collision sensing device for a vehicle In a vehicle collision sensing system, a relative pressure sensor senses a pressure difference between a pressure at an inside of a door interior space and a pressure at an outside of the door interior space. An air bag ECU determines the collision of the vehicle ba... | 06/03/2008 |
| 7360462 | Method and equipment for inspecting reinforced concrete pipe Deterioration of reinforced concrete pipes is checked and the deterioration progress level is classified. Based on the inspection result, a portion to be inspected in detail in an inspection area is selected. With respect to the selected portion to be inspected in d... | 04/22/2008 |
| 7350406 | Sensor chip breaking strength inspection apparatus and sensor chip breaking strength inspection method A sensor chip breaking strength inspection apparatus that performs sensor chip breaking strength inspection on a semiconductor wafer on which a plurality of sensor chips having a diaphragm portion are disposed includes: a stage on which the semiconductor wafer is mo... | 04/01/2008 |
| 7162919 | Blast pressure gauge Blast pressure gauges and methods for detecting blast pressure during a blast test. The gauges operate independently of power sources, are portable, and are used in harsh environments including test ranges. Each embodiment is constructed to detect blast pressures as... | 01/16/2007 |
| 6922933 | Primer removal tool A primer removal tool comprising a starter tap, a holder for the starter tap, one or more setscrews passing through the holder and against the starter tap for securing the starter tap in the holder, a handle, a spacer bushing connected to the center of the handle, a... | 08/02/2005 |
| 6732566 | Device for side impact detection in a motor vehicle A device for side impact detection in a motor vehicle, and a plausibility sensor side impact detection. This plausibility sensor is located in a loudspeaker which is already present in the lateral part for playback of music. This loudspeaker is used as a low-frequen... | 05/11/2004 |
| 6662624 | Shock testing of naval vessels using seismic airgun arrays Modern warships are designed to withstand the effects of a near miss underwater explosive event. To demonstrate that ship structure and equipment are designed and built to the requisite standard it is common for the entire warship to be shock tested by de... | 12/16/2003 |
| 6415671 | Pneumatic golf club testing machine A golf bombarding testing machine, which is mainly composed of a golf shooting apparatus, a club holding device, a ball-head holding device, a vibration-reducing device, a ball cage and a machine frame. By the club holding device or the ball-head holding ... | 07/09/2002 |
| 6182495 | Test machine for simulation of shock wave induced motion Equipment to be carried on marine vessels during sea travel, is mounted on the table of a test machine through which shock wave induced motion to be experienced by such equipment during the sea travel is simulated and applied to the equipment carrying tab... | 02/06/2001 |
| 6109093 | Split Hopkinson bar testing apparatus Split Hopkinson pressure bar apparatus capable of generating a compression wave or pulse in an input bar or member, said apparatus comprising an input bar or member, actuator means, a fragile or frangible component and an impactor bar or member held, in u... | 08/29/2000 |
| 5918265 | Device and method for producing a steep-fronted pressure wave in a liquid This device (1) produces a steep-fronted liquid pressure wave which strikes a body (12) to be tested with an adjustable table pressure. The device has a measuring tube (10) within or to which the body (12) is fixed, and which has a pressure-proof observat... | 06/29/1999 |
| 5606110 | Diaphragm construction for free piston shock tube/tunnel A free piston shock tube/tunnel and a diaphragm construction for a free piston shock tube tunnel in which the diaphragm is provided with multiple rupture areas.... | 02/25/1997 |
| 5551280 | Multi purpose shock sensor This invention relates to multi purpose shock sensor being used as a vehicle burglar alarm and/or a security system for restricted area, which consists of a cap, a vibration sensing element, a sealed cavity, and a balance weight in the characterized that ... | 09/03/1996 |
| 5487298 | Inertial Hopkinson bar shock sensor A device and method for measuring the intensity of high amplitude strain waves caused by the impact of a projectile or the detonation of an explosive on armor plate are disclosed. The sensor may be configured as a shock wave sensor. The shock wave sensor ... | 01/30/1996 |
| 5355456 | Pebble-bed evaporation and superheater assembly for vaporizing and heating a liquified cryogenic gas A pebble-bed evaporator and superheater assembly includes a tubular pressure shell with internal baffles, the latter including a plurality of apertures therein for passage of gas therethrough. Contained within the shell are heater elements and pebble elem... | 10/11/1994 |
| 5197323 | Pebble-bed heater and shock tube assembly A shock tube assembly for simulating high energy detonations includes a driver section, a diaphragm section, an expansion nozzle, an expansion tube and an improved system for providing a heated and pressurized gas for the driver. After preheating the impr... | 03/30/1993 |
| 5165270 | Non-destructive materials testing apparatus and technique for use in the field The present invention features an apparatus and method for impact-echo testing of structures in situ, in the field. The impact-echo testing method provides a non-invasive, non-destructive way of determining the defects in the structure. The method is both... | 11/24/1992 |
| 5050426 | Method for determining the reliability of men's contraceptives Method for determining the reliability of men's contraceptives, characterized by submerging the contraceptive in a liquid, injecting a liquid in impulses into the contraceptive, and generating shock waves.... | 09/24/1991 |
| 4932239 | Standard target for explosive charge testing A method of testing an explosive charge using a uniform shaped charge testing standard that is simulative of naturally occuring Berea sandstone test specimens. A quantity of zircon sand is mixed with from 3% to 8% by weight of the total mixture of a pheno... | 06/12/1990 |
| 4819638 | Apparatus for non-contacting disintegration of calculi The present invention is directed to an improvement for an apparatus for non-contacting disintegration of calculi in the body of the patient by emitting a focus shock wave from an output end of fluid-filled shock wave tube which output end has a flexible ... | 04/11/1989 |
| 4513402 | Earthquake simulator Earthquake simulator making it possible to produce seismic waves and apply them to a sample, wherein it comprises a generator able to produce shock waves, whose frequencies are similar to the shock wave frequencies produced in a natural earthquake, the ra... | 04/23/1985 |
| 4479378 | Method and system for determining effect of underwater explosion on submerged structures A method and system for experimentally determining response characteristics and strength capacity of submerged hull structures subjected to underwater explosion. This method and system allows testing in relatively shallow water, near the shore and in clos... | 10/30/1984 |
| 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 |
| 4140002 | Impact sound stressing holding assembly A holding assembly for impact sound stressing semiconductor wafers and the like including a novel fixture for securing the wafer across a sound tube by clamping between Teflon rings. A cover membrane is also secured across the sound tube to create a close... | 02/20/1979 |
| 4004449 | Impact sound stressing for semiconductors Apparatus for acoustical stressing of semiconductor wafers is disclosed, utilizing a number of small tungsten balls which are bounced on the surface of the wafer to be stressed. The movement of the tungsten balls is effectuated by clamping a wafer at one ... | 01/25/1977 |
| 3972222 | Method and apparatus for testing articles employing a small arms primer A small detonating device such as a rifle, pistol or shotgun primer or percussion cap is employed to provide gas and/or hydraulic pressure for the testing of the relative strength of articles such as plastic containers, sheet, tube and the like.... | 08/03/1976 |
