The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7437962 | Spindle or worm drive for adjusting devices in motor vehicles A spindle or worm drive for adjusting devices, especially seat adjustment devices, window lifters and sliding roofs, in motor vehicles. The drive includes a fixed spindle or relatively fixed toothed rack which is secured to the second of the two parts. The gear elem... | 10/21/2008 |
| 7053586 | Brushless repulsion motor speed control system A system for controlling the speed of a brushless repulsion motor having a series of switches mounted on a rotating armature for shorting circumferentially spaced armature coils comprising first stationary signaling means and a plurality of rotating detectors for ac... | 05/30/2006 |
| 6983667 | Impact micro-positioning actuator An impact micro-positioning actuator. In one aspect of the invention, a threaded shaft is threadably received in a nut and the nut is impacted by an impacting device, causing the nut first to rotate relative to the shaft by slipping as a result of shaft inertia and ... | 01/10/2006 |
| 6633143 | Reactionless rotary drive mechanism An articulating probe head includes motors 12 and 18 for driving respective output shafts 14 and 20 about respective orthogonal axes z and x to move a stylus 22 over the surface of a workpiece under the control of a controller 26. At least one of the moto... | 10/14/2003 |
| 6179527 | Apparatus for inserting flexible members into the earth Apparatus for inserting flexible members such as tie-back anchors for slope stabilization or prefabricated vertical drains into underlying earth which includes an articulatable mast to be arranged with a generally upright extent above the underlying earth... | 01/30/2001 |
| 6109123 | Rotational inertial motor An inertial motors utilizes a smoothly coordinated circular motion and converts the motion of circulating weights into a unidirectional series of impulses that drive a vehicle forward. Weights located on an armature are guided on tracks along radial paths... | 08/29/2000 |
| 5927678 | Compliant mounting system for automotive components A mounting system for securing a first component compliantly with respect to a second component has a flywheel mounted rigidly with respect to one of the components and compliantly with respect to the other component for rotation in a plane normal to the ... | 07/27/1999 |
| 5323569 | Item of furniture, particularly a cabinet, which is closable by a rotating/sliding door An item of furniture is described wherein, in order to economize on space, rotating and/or sliding doors are used for closing items of furniture, particularly cabinets. The cabinets comprise a shaft opposite the opening side of the body, which shaft is su... | 06/28/1994 |
| 4903535 | Power converting mechanism In the electric actuator of the present invention, the power converting mechanism is provided for converting the rotary power of the motor into linear power of the driven member, which needs no special component part. Therefore, in comparison with the pri... | 02/27/1990 |
| 4137783 | Device for converting a rotary movement into a reciprocatory movement The invention relates to a device for converting a rotary movement into an oscillating movement frequently employed in agricultural implements, comprising a rotatable driving shaft, a fly-wheel rigidly secured thereto, an oscillatorily driven body adapted... | 02/06/1979 |
| 4103760 | Mechanical shock arrestor Relative axial motion of a pair of strut members is converted into rotation of a shaft which drive a rotatably mounted inertia element. Rotation of the shaft in the opposite direction drives a second rotatably mounted inertia element. The inertia elements... | 08/01/1978 |