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 |
| 6917136 | Synchronous machine design and manufacturing Synchronous motors according to the invention operate at higher efficiency, with lower cost, reduced mass and reduced cogging. Magnet dimensions are selected that reduce cogging forces to a negligible amount even though there are fewer slots than normal. Optionally,... | 07/12/2005 |
| 6086065 | Apparatus for feeding sheets from a sheet store An arrangement for feeding sheets from a sheet store to either one of a plurality of stations includes a movable carriage which receives sheets fed from the store and which has driving cogwheels for coaction with a fixed cog railway outside the carriage. ... | 07/11/2000 |
| 5590995 | Conveying rail system for a trolly A conveying system provided with a rail system, with a trolley or the like, which is movable along the rail system, and with a switch device, by which a trolley can be diverted from one rail track to another rail track connected to the first rail track. T... | 01/07/1997 |
| 5178073 | Open top tipping rail vehicle with side projection progressively engaging formations at dump site for rotating body 360 degrees and dumping load This invention relates to a tipping rail vehicle including a wheeled frame and an open topped container body. It includes a connector pivotally connecting the body to the frame for rotation of the body at least partially about the pivot axis of the connec... | 01/12/1993 |
| 4326829 | Apparatus for lifting a heavy load and transporting it over an obstruction The present invention is directed to an overhead travelling crane for lifting and transporting a heavy load over an obstacle including a carriage with front and rear wheels mounted on independent axles for movement along respective rails. The rails engage... | 04/27/1982 |
| 4077136 | Ring shaped cooling device An annular frame has an outer and an inner wall defining a space therebetween and a plurality of wheels rotatably mounted on said walls. Carriages for carrying material to be cooled are located in said space adjacent each other. Each carriage has a pair o... | 03/07/1978 |
| 4032026 | Bulk hauling freight car unloading apparatus and method of operation An apparatus for unloading bulk cargo from a train of freight cars of the gondola or hopper type is provided. The unloading apparatus comprises a helical loop of track having a horizontal axis and with a loop extending vertically and positioned such that ... | 06/28/1977 |