In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7124879 | Endless belt A flexible endless belt mountable on rotating elements has an outer and inner surface between first and second lateral edges and a plurality of longitudinally spaced-apart laterally oriented upraised flights on the outer surface. Each flight has a single medial port... | 10/24/2006 |
| 6931826 | Dual drive material turning machine and method A machine for turning material piled on the ground in a windrow comprises first and second track assemblies spaced apart from one another and having a lift assembly therebetween. The lift assembly lifts the material upwardly and deposits it to the rear. The first an... | 08/23/2005 |
| 6666246 | Automated planer machine An automated planer machine for planing a piece of lumber. The planer machine has a feed table for slidably receiving the bottom surface of the piece of lumber along a traveling course. One or more planing heads extend on sides of the traveling course to ... | 12/23/2003 |
| 6557600 | Hold down apparatus for commercial wood molder A hold down apparatus for a commercial molder is provided. The hold down apparatus generally includes a number of hold down plates adapted to hold down a work piece as it is conveyed through the commercial molder. A method of holding down a work piece in ... | 05/06/2003 |
| 6305446 | Cutting machine A cutting machine comprises first (10) and second (12) work piece support means, said means including opposed surfaces operable to grip a work piece and move it in a controlled manner in a first dimension, and first (14) and second (16) cutting tools disp... | 10/23/2001 |
| 6170372 | Dual spring hold down for wood working tools A dual spring hold down for use with wood working tools, such as table saws, routers and shapers comprises a bracket mounted on the wood working table behind the tool and a hold down bar pivotably attached to the bracket with the hold down bar surrounding... | 01/09/2001 |
| 5680888 | Saw trimmer and method for trimming lumber pieces The saw trimmer is used for trimming lumber pieces. The saw trimmer comprises a conveyor for longitudinally moving lumber pieces across the saw trimmer. The lumber pieces are transversely disposed on the conveyor with reference to the longitudinal directi... | 10/28/1997 |
| 5477899 | Machine tool for machining workpieces mad of wood, plastic, etc. A machine tool for machining a workpiece fed in a transporting direction through the machine tool has a support surface for the workpiece and at least one upper rotary tool positioned above the support surface. At least one lower rotary tool is positioned... | 12/26/1995 |
| 5368080 | Apparatus and method for a board infeed system A board edging infeed optimization system is described. The infeed system is equipped with a conveyor which transversely advances the board, a conventional optical scanning station, and a computer which calculates a longitudinal reference datum line and a... | 11/29/1994 |
| 5224530 | Clamping and feeding device for the machining of boles The combination with a machining tool for machining boles, of a clamping and feeding device for feeding the boles to the machining tool. The clamping and feeding device comprises a slide on which the bole rests during machining. The slide has mounted ther... | 07/06/1993 |
| 5156257 | Woodworking machine, such as a traversing sanding machine A woodworking machine of the traversing type for carrying items (23) on a vacuum conveyor belt (3) is provided with a number of compressed air nozzles (10) which direct a stream of air towards the items (23) on the belt, the nozzles (10), being connected ... | 10/20/1992 |
| 5007469 | Pressing apparatus for a processing machine A pressing apparatus for a processing machine, especially a woodworking machine, preferably a grooving machine, including at least one adjustable pressing element that is provided for the workpiece which is to be processed and that is associated with a pr... | 04/16/1991 |
| 4881584 | Infeed conveyor for saw The invention is an infeed conveyor for a saw which enables feeding sweepy cants or logs in such a manner as to achieve a significant improvement in lumber recovery. The conveyor has at least one portion which can be configured between a straight line tra... | 11/21/1989 |
| 4865094 | Long log waferizer A long log waferizer for converting logs into wafers comprising a base, with a reciprocating hydraulic cylinder for controlling a wheeled movable frame adapted for linear reciprocating movement on the base. A motor is mounted to the movable frame to drive... | 09/12/1989 |
| 4642004 | Machining device provided with a blank-press connected to the tool and blank-press for such a device This invention relates to a machining device incorporating a blank-press connected to the tool and to a blank-press for such a device, wherein said blank-press is provided with an annular chamber surrounding said tool and obturated opposite the workpiece ... | 02/10/1987 |
| 4640056 | Vertically self-centering feed assembly A belt driven feed assembly having a plurality of floating passive pinch wheels and a plurality of floating drive wheels, staggered and offset from one another, for conveying flat stock having irregular upper and lower surfaces. The drive and pinch wheels... | 02/03/1987 |
| 4637443 | Saw assembly A saw assembly for reducing logs while passing the logs at least once through the assembly and resawing the resultant sawn blocks while re-passing the blocks at least once through the saw assembly. The assembly comprises a pair of chippers (1) and at leas... | 01/20/1987 |
| 4583574 | Flaker for trunk and residual wood Disclosed is a flaker for trunk and residual wood for the direct production of a mass of chips free of splinters and low in fines. Flaking takes place within a blade rotor equipped with a replaceable blade ring, which together with its housing may be move... | 04/22/1986 |
| 4576212 | Device in a machine tool for maintaining a workpiece displaced in its longitudinal direction, in engagement with the tool A device in a machine tool for maintaining a workpiece which is being worked during displacement in the longitudinal direction, in engagement with the tool. The device consists of a first pair of rigidly interconnected arms which, at one end, are pivotall... | 03/18/1986 |
| 4519429 | Log shaper A machine for forming a smooth surface on a cylindrical log workpiece as it is moved longitudinally past a cutting station which includes both shaping and planing blades. The same cutting pass also includes a cove cutting operation to cut a longitudinal c... | 05/28/1985 |
| 4362195 | Portable log debarking apparatus An elongated infeed frame supporting a debarking unit has a trailer-like structure so that it is readily portable and can be transported into a logging or debarking area. An off-bearing frame is also portable for easy transportation to the area. Each of t... | 12/07/1982 |
| 4244669 | Cutter head for cutting templates from cardboards, plastics, and the like A cutter head for cutting templates from cardboards, plastics, and the like, which includes a high speed rotatable cutting stylus, and a holding-down device for holding down the material from which the templates are to be cut out. The holding-down device ... | 01/13/1981 |