Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7420474 | Idiosyncratic emissions fingerprinting method for identifying electronic devices A method of producing idiosyncratic electronic emissions fingerprints from an electronic device is disclosed wherein emissions produced by the electronic device are collected and converted into one or more digital electronic fingerprints. The method contemplates a v... | 09/02/2008 |
| 6917297 | System and method for advance warning of severe weather for general aviation aircraft A system and method for advanced warning of severe weather for general aviation aircraft is presented. An aircraft includes an onboard weather tracker which monitors atmospheric condition changes. The weather tracker uses data from an onboard barometric altimeter an... | 07/12/2005 |
| 6636155 | Gauge having adjustable activating means A mechanical gauge having a mechanism for setting multiple alarms within tolerance values. When such tolerance values defined by the mechanism are reached, the same mechanism activates an alarm.... | 10/21/2003 |
| 6608558 | Damper device for building, and monitor and control system for damper device An oil pressure damper device for an architectural structure and a monitor and control system of the damper device without requiring an exclusive network for connecting between the damper devices and the monitor and control system, and is able to monitor ... | 08/19/2003 |
| 6263585 | Caliper probe-measuring device The present invention relates generally to measuring devices, namely calipers. The invention is a measuring device for measuring the height or depth of a conductive element comprising a stabilizing body comprising a beam; at least one leg extending from s... | 07/24/2001 |
| 5392526 | Angularity gauge for cylindrical surfaces An angularity gauging apparatus for determining if an angle formed between two longitudinally joined cylindrical surfaces is within expected straightness tolerances without requiring a direct measurement. The apparatus includes a fixed locating member and... | 02/28/1995 |
| 4558312 | Position detecting device An apparatus for use in determining the location of a surface of a solid object such as that being machined by a machine tool includes a stylus having an electrically conductive end that is supported by two support members, which are disposed in pressure ... | 12/10/1985 |
| 4477973 | Three dimensional graphics tablet A three dimensional graphics tablet for determining the three dimensional coordinates of points on an object placed on a supporting plane. The apparatus includes an articulated arm having at least two link elements connecting a contacting tip element to t... | 10/23/1984 |
| 4447956 | Centering device A centering device for locating and aligning the center of a workpiece with the center axis of the spindle of a manufacturing machine such as a drill press and the like, comprising a centering pointer and a centering block; the centering pointer having a ... | 05/15/1984 |
| 4294015 | Extensometer An extensometer for detecting traumatized ligaments where the elongation of the ligament is either abnormally large or abnormally small compared to the elongation measured on a healthy ligament for an angle of flexion of the knee. The extensometer include... | 10/13/1981 |
| 4223444 | Acoustic micrometer An acoustic micrometer for measuring the exact distance between two electrically interconnected metallic objects is disclosed. The micrometer comprises a micrometer head having an electrical contact at one end adapted to engage one of the metallic objects... | 09/23/1980 |
| 3982867 | Construction deck elevation gauge and easy-out bolt assembly For use in establishing the prescribed elevation difference between an adjustably movable deck member and a relatively stationary support member, an elevation gauge comprising a case, a contact carrier disposed in the case and guided for vertical movement... | 09/28/1976 |
| 3969713 | Bolt stress detector A method and apparatus for testing stress on a bolt head or nut having a central portion which deflects along the bolt axis as a function of stress, in which three electrical contacts, for example screws, are mounted in a line on and extending outwardly f... | 07/13/1976 |
| 3952418 | Master gear for checking tooth contact Master gear for checking tooth contact characterized by the fact that all or part of its contact surface is made of an insulating material and two sets of conductive detectors are regularly arranged on said tooth contact surface one of which extends paral... | 04/27/1976 |
| 3947814 | Audio tachometer system An audio-tachometer system including an electronic tachometer having a first pointer for indicating engine speed, and a second pointer that is manually settable to a desired engine speed for shifting gears, wherein the engine speed corresponds to the spee... | 03/30/1976 |
