Thomas Edison obtained a patent for an electrographic vote recorder.
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| Number | Title | Issue Date |
| 7216682 | Split wheel stump cutter with replaceable tooth blocks and cutting teeth A stump grinding apparatus having a split cutting wheel includes several replaceable cutter blocks secured to the periphery of the wheel. One or more replacement teeth are removably anchored in holes in each block and may also be mounted on holes in the side of the ... | 05/15/2007 |
| 7159626 | Multi-application wood working knife and clamping assembly A wood working knife for use in a wood working machine, comprising a knife body having a first cutting edge and an opposed second cutting edge, the knife body having a first clamping surface and a second clamping surface. The first clamping surface has opposed clamp... | 01/09/2007 |
| 6938656 | Adjustable wood processing device and method of adjusting the same A wood processing device having a spinning wood processing head having one or more spaced apart knives mounted on said spinning head for processing wood. The knives, upon contacting said wood, form a curved cut surface in said wood being processed. At least one limi... | 09/06/2005 |
| 6712105 | Method and apparatus for planing an article of wood A method and apparatus for planing an article of wood. Specifically disclosed is a cutting head adapted for rotation about an axis, and at least one elongate knife including a linear cutting edge for cutting the wood. The cutting edge terminates at opposite ends of ... | 03/30/2004 |
| 6640854 | Machining assembly including a rotating tool and exhaust hood The invention relates to a treatment unit with a cutting tool (1) for treating wood, plastic or the like. Said treatment unit comprises a suction hood (6) with a ring (17) that encircles the tool (1) completely in the circumferential direction and at leas... | 11/04/2003 |
| 6227267 | Canter A wing knife holder for a chipping head includes a plinth for releasable mounting of the knife holder to the chipping head hub, a cantilevered member mounted on the plinth, the cantilevered wing inclined rearwardly and radially outwardly, from an inner en... | 05/08/2001 |
| 6186199 | Milling tool for machining workpieces of wood, a derived timer product, a plastic material, etc. A milling tool for machining workpieces of wood, derived timber products, plastic material etc., has a support with a receiving portion and a cutting portion. The cutting portion has cutouts with a support surface for receiving at least two exchangeable c... | 02/13/2001 |
| 5996659 | Matched pair of plywood edge-banding router bits A matched pair of two rotatable cutting tools (bits) is adapted to be individually chucked into a common router. Each of these two cutting tools includes a shaft with a removable nut, two or three cutters, one or two bearings, and suitable shims. A first ... | 12/07/1999 |
| 5899252 | Router bit and routing method A router bit and method for cutting predetermined configurations in a workpiece. The router bit includes a body portion having an axis of rotation, a radial extent about the axis, and a longitudinal extent, and a shank member includes a shank to be retain... | 05/04/1999 |
| 5893400 | Debarker head assembly An improved debarking apparatus, which includes a substantially, cylindrically shaped debarker head having a plurality of cutting blades to form its out peripheral surface, the debarker head mounted on a central shaft so that it may rotate freely on the s... | 04/13/1999 |
| 5816301 | Knife supporting structure A cutter head in a chipper that includes a rotatable hub member, and multiple knife assemblies distributed circumferentially about the rotation axis of the hub member. Each knife assembly includes a base member or holder which has multiple knives detachab... | 10/06/1998 |
| 5617908 | Chipping cutter head including end cutting knives A substantially cylindrical cutter head for cutting chips from wood. The cutter head has a body formed of disc-shaped body sections mounted in a substantially axially aligned position. Double-edged knives are mounted on the perimeter of the cutter head bo... | 04/08/1997 |
| 5613538 | Knife holder for timber shaping and chip producing head The disclosure herein describes a knife holder forming part of a timber shaping and chip cutting head; the holder defines a flat shaped body bent in an open V-shape to form two integrally joined portions, one of which provides a surface for mounting upon ... | 03/25/1997 |
| 5423361 | Debarker bit with fiber cutter A bit with a fiber cutter for a rosser head debarking machine. The bit has a base for mounting the bit onto the rosser head. The striking edge of the bit is connected to the base and comes into contact with bark and removes the bark as the rosser head spi... | 06/13/1995 |
| 5329978 | Planer The invention provides an improved planar which effectively prevents undesirable torn grain. The planer of the invention includes at least one planer knife or blade and at least one pressing member, both attached to and supported on a cutterhead. The pres... | 07/19/1994 |
| 5168907 | Debarker head A Rosser type debarker head has a plurality of rounded, indexable cutting teeth spaced in patterns of repeated rows running axially the length of the cylindrical surface, each tooth being spaced along the cylindrical surface so that the total cutting patt... | 12/08/1992 |
| 4770219 | Adzer head assembly Adzer bit assemblies (18) are of noncircular outer surface configuration and have a noncircular surface seated against a face (15) of similar noncircular shape to hold the assembly against rotation. When becoming worn, the adzing bit assembly can be loose... | 09/13/1988 |