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 |
| 7351169 | Utility machinery and associated control arrangements A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through the sleeve and moveable axially in relation thereto, the hub supporting a second sheave ... | 04/01/2008 |
| 7217204 | Continuously variable belt drive system A continuously variable belt drive system including a driving pulley assembly, a driven pulley assembly, and a V-shaped belt engaged to transfer rotary power therebetween is disclosed herein. The driving pulley assembly includes an idler pulley portion. As the belt ... | 05/15/2007 |
| 6958024 | Automotive V-belt nonstage transmission An automotive V-belt nonstage transmission includes a drive pulley having a fixed sheave fixedly mounted on a drive shaft, a movable sheave mounted on the drive shaft, a return coil spring, a flyweight mechanism, a collar being rotatable relative to the fixed and mo... | 10/25/2005 |
| 5304098 | Adjustable sheave An adjustable sheave including at least one pair of annular belt grooves defining annular discoidal flange members relatively movable on an end threaded hub support through an annular adjusting ring threadedly mounted on the threaded hub support end, the ... | 04/19/1994 |
| 4196641 | Tandem-belt variable-speed transmission A tandem-belt variable-speed transmission has a pair of shafts each provided with a pair of outer disks flanking an intermediate disk forming therewith a pair of nips each receiving a respective belt. One of each of the outer disks is fixed on the shaft a... | 04/08/1980 |