Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7213547 | Valve A valve is constructed to strike a balance between providing relatively high sealing yet low friction as components of the valve move. The valve includes a port and an actuator movable relative to the port. A member is disposed between the port and the actuator. The... | 05/08/2007 |
| 5768094 | Bistable mechanism for collapsing and elevating a keyboard in a portable computer A notebook computer is provided with a collapsible keyboard in which a dome sheet with elastomeric key return dome members thereon is horizontally shiftable through elevation and retraction strokes to respectively shift the keys between elevated operating... | 06/16/1998 |
| 5149150 | Motion transmitting and amplifying device A resilient element such as a thin flat plate or disc spring, commonly known as a "Belleville" spring, which is capable of deflecting along an axis normal to its surface is modified to include an amplifying segment disposed in a central aperture in the fo... | 09/22/1992 |
| 5107714 | Releasable mechanical abutment A releasable mechanical abutment consisting of a profile made of a resilient, thin, and elongated material (1, 30, 42, 70, 90, 107) at least partly bent over itself along a longitudinal axis, a force or effort being applied and exerted on ends of the prof... | 04/28/1992 |
| 4838112 | Multiple rate force and movement actuator The inwardly facing portions of annular springs adjacent the inner edge thereof are formed into two or more regions of predetermined angular or curved slopes and radial extent. When the peak of a shaft cam passes an annular set of ball bearings between th... | 06/13/1989 |
| 4652706 | Double pole switch construction A switch construction comprises a waterproof housing and first and second contact assemblies in the housing which are operative for effecting and interrupting electrical continuity in first and second lines, respectively, of an electrical circuit connecte... | 03/24/1987 |
| 4406172 | Overspeed trip mechanism and method of assembling A Belleville spring type of overspeed trip mechanism is made to rotate at the same speed as the shaft by preventing slippage between the spring and the other members of the trip mechanism. Slippage is prevented by forming grooves in the periphery of the i... | 09/27/1983 |
| 4287780 | Snap-action member A snap-action member of a metallic material having a predetermined grain orientation and having at least one projection for locating the snap-action member in a preselected assembly position on seating means therefor in a control device thereby to align t... | 09/08/1981 |
| 4152559 | Pressure responsive device and piston seal There is shown a pressure responsive device for operating an electric switch plunger, the device having a port to receive fluid under pressure for application to a slidable piston that engages a pressure plate arranged to actuate a snap action disc spring... | 05/01/1979 |
| 4105041 | Hydraulic system A hydraulic system suitable for supplying fluid under pressure to the brakes and other elements of an automotive vehicle includes a valve casing formed with a first port, normally connected to a pump, a second port normally connected to a fluid storage ve... | 08/08/1978 |
