The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7347618 | Automatic pawl winding mechanism An automatic pawl winding mechanism for a watch movement has a rotor solidly attached to a rotor wheel and oscillating about the axis of a rotor pivot, a pawl wheel to which an oscillating motion of rotor is transmitted by the rotor wheel being pivoted about the axi... | 03/25/2008 |
| 7338200 | Pallet-stones for a clockwork movement A pallet stone cooperates with the teeth of an escapement wheel of a watch or clock movement, and includes a trailing plane and an impulse plane and at least one capillary channel acting as a tank for a lubricant, characterized in that the capillary channel connects... | 03/04/2008 |
| 7192180 | Detent escapement for timepiece The escapement includes a large plate 4 carrying a first finger 14 and a blocking member 6 carrying a second finger 11 and a locking pallet-stone 7. The first and second fingers 14 and 11 are shaped such that when the... | 03/20/2007 |
| 7097350 | Detent escapement for timepiece The invention concerns a detent escapement for a timepiece including an escape wheel fitted with teeth, a balance onto whose staff there is secured at least one roller 4 including an impulse pallet-stone and in the circular periphery of which a notch is made,... | 08/29/2006 |
| 7040803 | Detent escapement for a timepiece The blocking member (6) or detent member of the escapement carries a follower (20) which ends in a beak (21) which cooperates with a small roller (23) comprising a notch (22). When the locking pallet-stone (7) of the blockin... | 05/09/2006 |
| 6942378 | Detent escapement for timepiece The detent escapement includes a wheel 2 fitted with teeth 3, a roller 4 fitted with an impulse pallet stone 5, a blocking member in the form of a lever 6 hinged on a pin 8. The first and second arms 9 and 10 o... | 09/13/2005 |
| 5163535 | Timing mechanism In a governor of the type which is used for regulating the angular velocity of a toothed gear wheel which is biased to rotate, the improvement which comprises an inertial mass affixed to one end of a spring, the other end of the spring being affixed to a ... | 11/17/1992 |
| 4286693 | Mechanical snubber A mechanical, seismic-shock-absorbing snubber adapted to accept extremely high impact loads that may be imposed upon it by reason of its interposition between heavy, relatively moveable structures. While permitting essentially unrestricted, slow, relative... | 09/01/1981 |
| 4154054 | Toy timing device with a slip-stick escapement-like mechanism A toy timing device including an escapement-like mechanism regulating the movement of a movable portion toward a position on a housing toward which it is biased by the alternate slipping and sticking of parts of a rubber band extending over ribs on the mo... | 05/15/1979 |
| 4100728 | Mechanical digital stopwatch A mechanical spring-powered hand-held digital stopwatch having a gear-operated decade counter display assembly, a spring-powered windup mechanism adapted to reset the counter during winding by means of a unidirectionally activated ratchet assembly, and a ... | 07/18/1978 |
| 3975962 | Click work for a watch movement In an electric timepiece an electric motor continuously rotates a disk carrying an eccentric pin that is engageable inside a heart-shaped opening formed in an actuating member carrying a pair of pallet pins engageable with and between the teeth on opposit... | 08/24/1976 |