Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7412999 | Label remover The present invention relates to a hand held label removal apparatus, which provides a safe and easy removal of otherwise hard to remove labels that are affixed to various types of containers such as carton packaging, plastic products and similar materials. The dist... | 08/19/2008 |
| 7251887 | Tool for balancing rotating components A tool for limiting a cut on an impeller having a shaft and vane is provided. The tool includes a shield member having a sidewall, a top, and an inner cavity. The tool also includes a first cut opening extending through the hub sidewall to the shield member inner ca... | 08/07/2007 |
| 7223163 | Cover device for a power tool A cover device for partially covering a disc-shaped working tool includes a bearing member (22) forming a receiving space (54) for receiving the shielding member (10) of the working tool and having an inner surface (24) against which an o... | 05/29/2007 |
| 7137873 | Grinding method for workpiece, jet guide means and jet regulation means used for the method A grinding method is provided which can grind a processing surface of a workpiece by a blast processing without use of specific abrasives to obtain a glossy surface such as a mirror surface. Abrasives together with compresses fluid are injected to the processing sur... | 11/21/2006 |
| 6910959 | Fixture for a grinding or polishing wheel A fixture (1) for guidance of a tool having a cutting edge with respect to the periphery of a rotating grinding or polishing wheel (2), comprising a frame structure that runs along the periphery (6) of the wheel and has a guide formed as a slot ... | 06/28/2005 |
| 6893334 | Rotating guard for angle grinder A guard for a rotary cutting tool allows for automatic adjustment of the guard relative to the cutting disc and to a workpiece. Such an automatic adjustment allows a user to cut around substantially the entire circumference of a rounded workpiece, such as a pipe, wi... | 05/17/2005 |
| 6846231 | Removable sharpening attachment for a rotary hand tool A sharpening attachment for a powered rotary hand tool of the type which has an output shaft with a tool bit holder that extends from a housing is disclosed. The sharpening attachment is mounted on the housing and comprises a body portion with an interior opening th... | 01/25/2005 |
| 6749495 | Machine tool with roof covering bellow A machine tool comprises a working area, closed by walls and a roof covering, in which a device for receiving a work piece is arranged, and a headstock with a main spindle is arranged, into which tools for machining the work piece can be clamped. Device and headstoc... | 06/15/2004 |
| 6726554 | Guide ring removal device A guide ring removal device. The guide ring removal device includes a column press, a first disc, a second disc, and a plurality of fasteners. The first disc is disposed on the column press. The second disc is disposed on a point of the column press to exert force o... | 04/27/2004 |
| 6676498 | Bi-directional grinder A bi-directional grinder for allowing an operator to change the direction of rotation of the wheel, having a housing, a motor capable of bi-directional rotation, and a shaft. The grinding wheel is mounted on the shaft within a shroud and attached to the s... | 01/13/2004 |
| 6585578 | Girinding wheel machine bracket adjustable in angle A grinding wheel machine bracket comprises a fixations eat having a long through hole to receive a screw for fastening the fixation seat with a grinding wheel machine. The fixation seat has a pivoting seat with an axial hole, and a pointer located at the ... | 07/01/2003 |
| 6520838 | Shielded spin polishing A shield is placed next to a workpiece to form a passage therebetween. The workpiece and shield are rotated, and a stream of abrasive shot is blasted toward the spinning workpiece and shield to periodically enter the passage to selectively abrade the work... | 02/18/2003 |
| 6502589 | Method and device for cleaning and polishing jewelry The present invention broadly comprises a cleaning device for jewelry comprising a container having a top rim, side walls, and a bottom; a mesh liner operatively arranged to be removably secured within the container and proximate the side walls and bottom... | 01/07/2003 |
| 6210261 | Tool protective shield The present invention, a tool safety shield, comprises a clip with at least one shield. The clip further comprises vent ribs. The shield extension further comprises a vacuum port. Both one piece and two piece embodiments are disclosed. The tool safety shi... | 04/03/2001 |
| 6126529 | Belt sander stabilizer A belt sander stabilizer for keeps a sander body and the portion of the sander belt that makes contact with the surface being sanded level during operation. The belt sander includes a shield having an upper panel and a pair of lateral sides that downwardl... | 10/03/2000 |
| 6109843 | Shield assembly for masking a stator of a rotary machine A shield assembly 98 is disclosed which has one or more shield elements 102, 104, 106 which block, during machining of a seal member 70 for a rotary machine 10, seal particles from entering a vane cluster 58. Various construction details are developed whi... | 08/29/2000 |
| 5725419 | Apparatus for removing excess material from workpieces An apparatus for removing excess material, such as spur bits or sprues, from workpieces, provided with a support surface having a guide channel therein for receiving excess material therein for guiding to a rotatably driven removal tool having a periphera... | 03/10/1998 |
| 5651727 | Grout removing tool and adapter which employs a water delivery system There is disclosed herein an adapter system for use with a hand-held electrically-driven grinding tool, which rotatably drives a grinding wheel for removing grout or mortar from a work site. The adapter system is constructed to controllably deliver a liqu... | 07/29/1997 |
| 5462243 | Aircraft passenger window maintenance shield An aircraft passenger window maintenance shield is provided to form a protective barrier about an aircraft window to prevent damage to the area surrounding the window during a window outer pane external surface repair procedure involving rotary power equi... | 10/31/1995 |
| 5449317 | Grinding and cutting guide assembly for hand held shaping tool A drilling, grinding, and shaping guidance assembly particularly suited for attachment to a precision jewelers' grinding and cutting handpiece. The guidance assembly is integrally attached or clamped on the jewelers' handpiece. The guide arms of the assem... | 09/12/1995 |
| 5419736 | Device for clearing material waste A device for clearing material waste from telescopic plates of a cutting machine and includes an affixing element and a clearing rubber mounted to an underside of each telescopic plate. The affixing element has at least one groove to hold the clearing rub... | 05/30/1995 |
| 5044312 | Conformal coat contact insertion strip mask A mask for protecting edge conductors of printed circuit boards from the spray coating which is sprayed on the board. The mask is molded from a soft silicone-based-elastomer material in a configuration which presents a sharp sealing edge and a large inter... | 09/03/1991 |
| 5036628 | Seal assembly for a wafer grinding machine A seal assembly is mounted within a grinding machine to separate a grinding wheel from the main portions of a wafer being ground. The seal assembly has a pair of free edges which are disposed to define a V-shaped gap through which the peripheral edge of t... | 08/06/1991 |
| 4966505 | Machine tool A machine tool comprises a spindle stock and a worktable having an upper surface thereon for mounting and machining workpieces. The worktable and the spindle stock are alternatively displaceable relative to each other in a plane parallel to the upper surf... | 10/30/1990 |
| 4964244 | Energy dissipating receptacle for high-velocity fluid jet An energy-dissipating receptacle for use with a fluid jet cutting system is disclosed. A plurality of circulating suspensoids within the cavity are impinged upon by the jet to dissipate the jet's kinetic energy. A filtered drain are included for permittin... | 10/23/1990 |
| 4914872 | Apparatus and method for selectively contouring an airfoil root A buffing guide includes a mating surface, a first guide surface, a second guide surface and means for engaging an airfoil root. The buffing guide directs a buffing wheel into precise contact with a root edge at a point where selective contouring is desir... | 04/10/1990 |
| 4768902 | Machine tool A machine tool comprises a displaceable work table (12) having a first area which in a first position in which it serves as the processing side carries workpieces for being processed by means of a tool of the machine tool, and a second area which in a sec... | 09/06/1988 |
| 4677718 | Safety hood for palette change-over devices of machine tools In a machine tool having a palette change-over device protected by a movable U-shaped hood, to prevent injury to the operator or accidental damage during movement of the hood the hood is provided with a probe and an automatic circuit breaker arranged to s... | 07/07/1987 |
| 4620503 | Shutter masking mats A pair of like adjustable masking mats for variously sized rectangular storm shutters, each including top and bottom L-shaped panels. A longitudinally oriented elongate groove is disposed on the back side of the long leg of the top panel while a complemen... | 11/04/1986 |
| 4530861 | Method and apparatus for masking a surface of a blade member A method and apparatus for masking from treatment selected surfaces of a turbine blade. The blade is positioned in an apparatus which includes a holder enclosing the airfoil section of the blade and a distinct spaced apart mask member elastically secured ... | 07/23/1985 |
| 4411219 | Apparatus for protecting the frame surrounding a window or door opening and a window or door within the opening A paint guard for protecting frame windows or doors, includes a rectangular framework of four right annular frame members which are telescopically interconnected so as to permit the framework to expand and contract in height and width. Flanges at the peri... | 10/25/1983 |
| 4308630 | Deburring apparatus A protective device is provided for a front face deburring of workpieces or profiles, particularly pipes, in a deburring machine having a rotating tool, e.g., a brush or a grinding wheel, or the like, which acts on the workpiece. The device includes an ad... | 01/05/1982 |
| 4217854 | Paint guard device A device for guarding against the placement of paint in unwanted areas during painting, including an elastomeric body having a butt edge and a feather edge opposite the butt edge for cutting in a line defining the boundary of a painted area. A handle is f... | 08/19/1980 |
| 4004379 | Scratch preventer A scratch preventer for use in preventing a sanding tool from straying onto a surface of a panel adjacent a workpiece that is being sanded includes a panel or sheet of molded elastomeric material having magnetized material included therein to permit the p... | 01/25/1977 |
