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 |
| 8141696 | Replaceable sound dampening conveyor chain flight A conveyor flight for a chain comprising at least two spaced apart links, and two side plates that connect the links, with each side plate including two spaced apart extension pins extending from the side plate. The flight comprises a metal support, and the metal su... | 03/27/2012 |
| 7311193 | Box-conveyor chain A conveyor chain has a succession of longitudinally succeeding links, a respective entrainment lug projecting transversely outward from each link and formed with a latch seat and a plurality of identical entrainment elements. The entrainment elements each have a tra... | 12/25/2007 |
| 7150351 | Scraper chain conveyor comprising plastic pushers A drag chain conveyor for use in underground mining, including interconnected, profiled conveyor chutes in which are guided conveyor chains of metallic material. Plastic carriers are attached to the conveyor chains, with attachment being effected via a molding aroun... | 12/19/2006 |
| 7147099 | Sprockets in a cleanable modular belt conveyor An easy-to-clean conveyor with sprockets that reveal the hinge area of a modular conveyor belt to a fluid spray. A conveyor includes a modular belt constructed of rows of belt modules hingedly linked together in series by hinge pins into an endless belt loop. A spro... | 12/12/2006 |
| 6854591 | Detachable flight for pocket size adjustment In collating packaging equipment and the like, a novel flight that comprises a flight body including at least one spring loaded arm that engages the conveyor drive chain to allow rapid and simplified interchangeability of flight arrangements, i.e. pitch or pocket si... | 02/15/2005 |
| 6662932 | Chain and flight conveyor with swivel links A chain driven by two sprockets spaced a short distance apart along their common axial centerline. The chain includes elongated pins that extend beyond the outer surfaces of the chain link plates, on both sides, by a distance about equal to the width of t... | 12/16/2003 |
| 6155405 | Power transmission device for transmitting thrusting forces A transmission system for transmitting pushing forces along straight and curved paths includes a guide channel (1) and a line of transmission members (10) arranged in the guide channel. The transmission members are acted on by a drive. The transmission me... | 12/05/2000 |
| 5545000 | Automatic eject finger retractor for document set eject system An automatic retractor system for retracting a finger element extending from a transport belt, as for example, in a document set compiler and eject apparatus, including a belt transport system having ejector fingers extending therefrom for assisting in th... | 08/13/1996 |
| 4807742 | Drag link chain An improved drag link chain is fabricated from a plurality of links joined together in articulated relationship for moving bulk material along a trough or other conveying surface. The links are made having an open end and a closed end. The closed end incl... | 02/28/1989 |
| 4512705 | Horizontal plow system method and apparatus for reclaiming and homogenously blending bulk solid particulate matter such as coal A horizontal plow system method and apparatus has been developed for the homogenous blending and reclaiming of bulk solid particulate matter, such as coal, at a utility plant. The horizontal plow system apparatus comprises one or more displacement assembl... | 04/23/1985 |
| 4187943 | Drag chain links Drag type feed chains employing links interconnecting one with the other at positions sufficiently above the center lines of the links to increase the strength of the associated abrasion dragging surfaces of the links.... | 02/12/1980 |
| 4128115 | Entraining element for a gripper shuttle The entraining element is constructed of a carrier, a striking member and a support member. The striking member is fixed to the conveyor chain via the carrier and has a resilient striking plate which extends transversely of the gripper shuttle path for re... | 12/05/1978 |
| 4089406 | Chain drive A chain drive includes an endless chain formed of forked links and trained about a drive sprocket and a return sprocket. Each sprocket includes circumferentially arranged teeth and a polygon which radially supports the chain links as they travel about the... | 05/16/1978 |
| 4036376 | Cargo transport system A cargo transport system is provided for a vessel in which a transfer mechanism separately transfers discrete cargo loads from a loading station on the deck of the vessel to a vertically extending conveyor system. A powered cargo delivery system sequentia... | 07/19/1977 |
| 4014267 | Conveyor chain structure A conveyor structure including a power track on which a conveyor chain is supported and a free track along which free trolleys travel. The conveyor chain includes alternate center or main links that are pivotally interconnected by alternate pairs of side ... | 03/29/1977 |
| 3968013 | System for cleaning work pieces with solvent Apparatus adapted for cleaning or degreasing work pieces by contacting with an organic degreasing agent such as a halogenated hydrocarbon. The work pieces are moved in and out of contact with the degreasing agent and are supported on an array of substanti... | 07/06/1976 |
| 3957153 | Pusher-type chain for conveyor means An improved pusher-type chain for a conveyor, the conveyor being of the type comprising an elongated base means having a bottom and upstanding side guides or flanges. The base means may be made up of two or more longitudinal sections joined together in su... | 05/18/1976 |