Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7008308 | Wafer carrier A wafer carrier for retaining at least one semiconductor wafer in a processing apparatus during a processing operation which removes wafer material by at least one of abrading and chemical reaction. The processing apparatus is adapted for removing wafer material fro... | 03/07/2006 |
| 6840722 | Machining apparatus and machining method A machining apparatus for machining a workpiece by rotating and revolving either the workpiece or a tool 1 to contact with each other. The machining apparatus comprises rotation/revolution ratio setting motors M1 and M3 for setting a ratio of a ... | 01/11/2005 |
| 6439984 | Molded non-abrasive substrate carrier for use in polishing operations Thin, planar substrates are carried on a substrate carrier (20) through a polishing operation. The substrate carrier (20) is injection molded or modified-injection molded from a plastic material, and includes one or more receptacles for receiving the subs... | 08/27/2002 |
| 6350187 | Abrasive machine An abrasive machine includes a rotatably driven tool, chucking equipment for holding the work pieces and a feeding device for effecting relative displacement between the work piece and the rotatably driven tool. The machine further includes a tubular cyli... | 02/26/2002 |
| 6296554 | Non-circular workpiece carrier A non-circular workpiece carrier, which includes a wheel-like carrier body, and at least one carriage, wherein the wheel-like carrier body has a transmission unit disposed around the periphery thereof, which receives a transmission power for causing the w... | 10/02/2001 |
| 6231427 | Linear polisher and method for semiconductor wafer planarization A wafer polisher and method for the chemical mechanical planarization of semiconductor wafers. The polisher includes a wafer holder for supporting the semiconductor wafer and a linear polishing assembly having a polishing member positioned to engage the s... | 05/15/2001 |
| 6030280 | Apparatus for holding workpieces during lapping, honing, and polishing The present invention relates generally to a device used to process workpieces. In particular, the invention relates to a carrier that is used to support a workpiece during workpiece honing, grinding, or polishing. The carrier includes a rigid core coated... | 02/29/2000 |
| 6030278 | Surface machining method and apparatus A wafer is rotated on its axis, which is biased with regard to an axis of a grinding wheel, and revolves around an axis which is biased with regard to the axis of the wafer and the axis of the grinding wheel. In this state, the grinding wheel is abutted a... | 02/29/2000 |
| 5888128 | Hand grinder A hand grinder, comprising a housing, a motor arranged in the housing, a tool holder with a grinding tool received in the tool holder, a work shaft driven by the motor, two rotary bearings which support the work shaft, a compensating unit arranged on the ... | 03/30/1999 |
| 5471900 | Method for turning a workpiece In a two-axis turning machine, the cutting tool unit machines a first diameter of a workpiece portion of barstock extending from a main spindle chuck. A special subspindle chuck rotating in the same direction advances axially, grasps the workpiece as it i... | 12/05/1995 |
| 5441442 | Method of manufacturing a plate having a plane main surface, method of manufacturing a plate having parallel main surfaces, and device suitable for implementing said methods Methods and device for manufacturing a plate with a plane main surface or with parallel main surfaces, whereby material is taken off from the edges of the plate and from the central portion of the plate alternately by means of polishing in order to obtain... | 08/15/1995 |
| 5042204 | Finishing machine for trochoidal surfaces An improvement in a finishing machine for trochoidal surfaces of a rotary engine housing. The finishing machine rotates the engine housing in a trochoidal path around a constant tool engagement point that utilizes a super finishing abrasive film advanceme... | 08/27/1991 |
| 4996798 | Ultra-precision lapping apparatus A lapping apparatus of the "planetary" type that laps a workpiece to a true flat surface instead of to the domed surface characterizing the prior art: it includes a mechanism for spinning and orbiting the workpiece against a lapping disk that has a 360-de... | 03/05/1991 |
| 4891914 | Computer controlled universal grinder and method for grinding trochoidal and circular bearing races A grinding machine for grinding epitrochoidal, hypotrochoidal, and circular bearing races in one set-up without having to move the part and to insure near perfect concentricity between all of the bearing races. A machine blank is mounted on an upper rotary tab... | 01/09/1990 |
| 4650064 | Substrate rotation method and apparatus A frame which carries a plurality of circular substrates seated in grooves in planar alignment. The substrates are seated in grooves defined within the circumferential periphery of apertures within the frame. Each groove and aperture have a diameter sligh... | 03/17/1987 |
| 4617762 | Cam controlled machine for forming non-standard surfaces A cam controlled grinding machine in one embodiment of which the spindle is supported for rotation and lateral movement within a nest of three annular rings. Advantageously, roller bearing arrays between the spindle and the first annular ring, the first a... | 10/21/1986 |
| 4615145 | Apparatus for mechanically finishing workpieces A polishing apparatus is provided with a fixed gear and at least one planet gear which meshes with the fixed gear to make at least one spindle coupled to said planet gear perform orbital revolution and own rotation by making the planet gear rotate around ... | 10/07/1986 |
| 4608784 | Work spindle device A work spindle device having a rotor which allows a workpiece to be fed and ejected quickly and permits the workpiece to be machined simultaneously at opposite ends thereof. A clamp member having collets on opposite ends and a central axial through hole f... | 09/02/1986 |
| 4428163 | Shaping machine The or each workpiece carrying plate is connected to a rotary spindle by three elastically yieldable struts which are arranged around the axis of rotation of the spindle. The plate carries a peripheral cam which is engaged by a roller carried by an elasti... | 01/31/1984 |
| 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 |
| 3930343 | Device for mounting specimens Device for mounting specimens for the purpose of lapping, grinding and polishing metallographic specimens for microscopic analyses, comprising a rotatable polishing wheel with a number of specimen holders disposed thereabove, a driving roller centrally lo... | 01/06/1976 |
