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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 |
| 5035087 | Surface grinding machine A surface grinding machine comprises a wheel head vertically movably supported; a cup-shaped diamond wheel supported by a rotatable wheel shaft at one end of the wheel head and having an abrasive grain layer of Young's modulus (10-15)×104 kgf/... | 07/30/1991 |
| 5007209 | Optical fiber connector polishing apparatus and method An optical fiber connector polishing apparatus is disclosed which comprises a polishing element rotated at high speed, a chuck for supporting an optical fiber connector in such a manner that the optical fiber connector is rotatable in a reciprocation mode... | 04/16/1991 |
| 5005320 | Method and apparatus for tapering an end of an elongated object An elongated object in need of tapering at an end thereof is secured by holder means which comprises a ball bearing that rotates the elongated object and the holder means together by means of contact with a rotating grooved ring disposed upon a rotating p... | 04/09/1991 |
| 5003728 | Machine for abrasive treatment The machine for abrasive treatment comprises an abrasive tool (1) and a device for establishing the holding-down force within the machining zone, said device having a housing (3) provided with guideways, wherein poppet sleeves (4) carrying spindles (5) ar... | 04/02/1991 |
| 5001868 | Apparatus for grinding a point on a tungsten electrode An apparatus for grinding a point on a tip of an elongated tungsten-electrode rod has a base, a disk rotatable on the base about a disk axis and having a disk face substantially perpendicular to the disk axis, and a drive on the base for rotating the disk... | 03/26/1991 |
| 4989373 | Flat glass edging-bevelling machine A flat glass edging-bevelling machine is employed for rounded cutting or working of peripheral areas of cut flat glass. By disposing major operation parts of the machine higher in elevation than the flat glass wearing or abrasion of major operational part... | 02/05/1991 |
| 4894957 | Apparatus for abrasive machining of planar surfaces In a machine tool for abrasive machining of planar surfaces having a bed (1) supporting a workhead (28), a faceplate (9) carrying an abrasive tool (11), which is mounted for rotation by means of a thrust bearing (13) on an annular support (12) attached to... | 01/23/1990 |
| 4879258 | Integrated circuit planarization by mechanical polishing A process for planarizing the surface of a semiconductor wafer, after the wafer has been processed to form nonplanar topography layers on the blank, polished wafer, by mechanically removing material from this surface by abrasion until a desired planarity ... | 11/07/1989 |
| 4811523 | Apparatus for fine machining of plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness An apparatus for fine machining of plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness is described. The apparatus is provided with a chuck, preferably realted, for receiving the workpiece and a cup wheel... | 03/14/1989 |
| 4811522 | Counterbalanced polishing apparatus Improved polishing apparatus. The apparatus includes a polishing head which holds a semiconductor wafer against a polishing surface. The apparatus permits the accurate application in small increments of pressure to the semiconductor wafer and provides a p... | 03/14/1989 |
| 4754576 | Optical fibre grinder A grinding device for grinding the ends of fibres and particularly optical fibres comprises a stand 10 carrying a mounting arrangement 13 for mounting a fibre and rotating it about its longitudinal axis. The stand 10 also carries a grinding wheel 18 and a... | 07/05/1988 |
| 4667445 | Rotary grinding machine A rotary grinding machine comprising a grinding wheel supported by a column on a bed, a work table rotatably supported on the bed and carrying thereon a workpiece to be ground, a fluid passage holder located in a circumferential groove formed in the work ... | 05/26/1987 |
| 4575969 | Grinding machine for punching tools A surface grinding machine has a motor-driven grinding disc supported in a carrier movably supported above the base and a tool holding fixture on the base which is rotatable about a laterally offset axis. A control assembly includes a contact arm which is... | 03/18/1986 |
| 4525957 | Apparatus and method for finishing radial commutator Grinding apparatus and a method for finishing face-type commutator are shown for producing a cycloidal like grinding pattern which has a controlled depth of surface roughness established by the grain size of abrasive grit and a pitch which is controlled b... | 07/02/1985 |
| 4481741 | Polishing machines incorporating rotating plate The invention relates to improvements in polishing machines incorporating a rotating plate. The upper face of the rotating plate is provided with a groove of circular section, in which is removably retained the base of a collar or screen, which defines on... | 11/13/1984 |
| 4471579 | Lapping or polishing machine Lapping or polishing machine, wherein for cooling a plurality of zones of its working face the tool comprises for each of these zones separate supply conduits for fluids at different temperatures and/or rates of throughflow, and there are also provided te... | 09/18/1984 |
| 4459785 | Chuck for vertically hung specimen holder A chuck for suspending a specimen holder from a vertical drive shaft to permit the specimen holder to be rotated about the axis of the drive shaft and also pressed downwardly against an abrasive platen or the like which may also be rotated in the same or ... | 07/17/1984 |
| 4419848 | Method and apparatus for rotating a stylus during lapping A stylus is attached to one end of a stylus holder which is mounted on a trunnion and adapted to rotate about a first axis. Attached to the trunnion is means for pivoting the trunnion about a second axis transverse to the first axis, in order to position ... | 12/13/1983 |
| 4417423 | Stylus manufacturing method A method for forming a face on a crystalline dielectric material having anisotropic crystallographic hardness. The method includes the steps of contacting the dielectric material with an abrasive surface having a loosely bound charge of abrasive particles... | 11/29/1983 |
| 4403453 | Stylus coning fixture An apparatus for positioning the tip of a stylus adjacent a rotating scaife while continuously rotating the stylus comprises a base plate connected to a platform by means for sweeping the plate through a sweep arc. A tube is connected to the base plate by... | 09/13/1983 |
| 4373302 | Sharpening apparatus for circular blades A bench-mounted sharpener apparatus for large diameter comparatively narrow width circular blades, such as a slitter blade, that includes a gear motor for turning a blade at a steady comparatively slow speed of rotation. A grinding wheel to form a precisi... | 02/15/1983 |
| 4300274 | Method of manufacturing connecting rod for axial cylinder-type reciprocating piston engine A method of manufacturing a connecting rod for reciprocating piston engines, especially axial cylinder-type reciprocating piston engines, with the connecting rod including a tubular shaft having hollow spherical shells mounted at the ends thereof. The tub... | 11/17/1981 |
| 4287687 | Variable work holding device for grinding gemstones This invention is that of a variable work holding device to be used for the grinding of various gemstones and industrial diamonds. The design and structure of the device provides that the device may be set up to operate in five different modes and provide... | 09/08/1981 |
| 4240231 | Rectilinear work finishing apparatus An apparatus for finishing work pieces such as by abrading, grinding or polishing wherein said work pieces are carried by a work holder movable through a rectilinear path while being simultaneously rotated about a vertical axis beneath a continuous moving... | 12/23/1980 |
| 4149343 | Surface-grinding method and apparatus A surface grinding method and apparatus wherein workpieces are ground with a ring-shaped grinding wheel having a ring-shaped grinding surface the inner diameter of which is relatively large with respect to the dimensions of the workpieces. The method and ... | 04/17/1979 |
| 4014140 | High-precision chamferring apparatus Apparatus and method for automatically chamferring edges and corners of rectangular articles. According to the invention, an article blank is subjected, under control of a guiding means, to a grinding wheel for grinding the edges of the blank. A turning m... | 03/29/1977 |
