Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6788019 | Electric discharge machining device and electric discharge machining method An electric discharge machining apparatus is provided with an electrode mounting section which mounts a tool electrode, and an electrode driving section which has a radial driving section which supports and drives the electrode mounting section in a non-contact mann... | 09/07/2004 |
| 6097168 | Position control apparatus and method of the same, numerical control program preparation apparatus and method of the same, and methods of controlling numerical control machine tool A position control apparatus has a target setting unit for setting a target position in a direction of the control axis of the controlled object able to be moved in directions of a plurality of control axes by moving unit; a position control unit for inde... | 08/01/2000 |
| 5343402 | Non-contact digitizing control unit The purpose of the invention is to carry out the most appropriate attitude control of non-contact distance detectors (5a, b) onto the tracer model (6) surface and provide a digitizing control unit with high accuracy. A non-contact distance detecting devic... | 08/30/1994 |
| 5327351 | Non-contact digitizing method When a non-contact tracing of a configuration of a three-dimensional model is carried out, the measurement axis of a tracer head is controlled to always be facing in an optimum direction with respect to a model surface by controlling the attitude of the t... | 07/05/1994 |
| 5274563 | Noncontact tracing control system A noncontact tracing control system for tracing machining a workpiece through a tracing of the contour of a model without contact. Coordinate values of a plurality of points on the model surface are acquired from measured values obtained by a plurality of... | 12/28/1993 |
| 5243265 | Non-contact tracing control apparatus A non-contact tracing control apparatus is disclosed which traces the surface of a model by using at least two optical distance detectors for detecting the distances therefrom to the model. When a first light corresponding to a first of the optical distan... | 09/07/1993 |
| 5241485 | Noncontact tracing control system A noncontact tracing control system for machining or digitizing a workpiece through tracing the shape of a model without a contact therewith. Coordinate values of each vertex of a micro quadrangle on a model surface (6) are obtained from measured values a... | 08/31/1993 |
| 5140239 | Non-contact tracer control device A non-contact tracer control device for carrying out a profile machining on a workpiece while tracing the profile of a model in a non-contact fashion. Two non-contact distance detectors (5a, 5b) are slantingly mounted to a tracer head 4) controlled throug... | 08/18/1992 |
| 5136224 | Digitizing method A digitizing method for digitizing model surface data by tracing a model (MDL) with a stylus (STL) is described. At the time of digitizing, a time (T) required for predetermined conditions to be satisfied and stylus traveling distance (ƊL) during this ti... | 08/04/1992 |
| 5126646 | NC program drawing method An NC program drawing method for an interactive numerical control device is provided, in which an NC program is represented by a composite drawing composed of a solid drawing (1a, 1b, 1c) and a wire frame drawing (1d, 1e), whereby the drawing of machining... | 06/30/1992 |
| 5095440 | Numerical control apparatus A numerical control apparatus is characterized by a structure in which: a machining program stores the final shape of a work as well as the shape of a material; designates the outermost point (an apex) on the work in a direction opposing a cutting directi... | 03/10/1992 |
| 4999555 | Digitizing method A digitizing method in which a distance from a model surface is measured and stored at regular intervals of time or distance to obtain digital profile data of the model. A specified profile for correction is provided on a part of the model, and by using t... | 03/12/1991 |
| 4739489 | Area cutting method The present invention provides an area cutting method for machining an area (AR) bounded by the curve (OLC) of a predetermined external shape previously using a unidirectional cutting motion. The invention has a step of performing cutting along an i-th cu... | 04/19/1988 |
| 4672551 | Die machining apparatus in automatic programming This invention has improved the automatic programming method which is used for machining the configuration of a curved surface of a die. The values of X and Y coordinates are calculated by a machining path production device through a curved surface config... | 06/09/1987 |
| 4580225 | Method for producing multiple entry threads A method is disclosed for machining multiple entry threads on a workpiece. The preferred steps of the method are preferably carried out in conjunction with a computer-based numerical control system. The method includes the steps of: determining the angula... | 04/01/1986 |
| 4535408 | Numerical control machining method and apparatus A numerical control machining method and apparatus wherein a workpiece (101) is machined on the basis of curved surface data defining a curved surface. In the numerical control machining method and apparatus, a first boundary surface (103) serving as an u... | 08/13/1985 |
| 4355362 | Tracer control system In a system which performs tracer control by calculating the direction and the velocity of tracing through utilization of signals from a tracer head tracing the model surface, there are provided an input unit for entering data defining the tracing operati... | 10/19/1982 |
| 4122379 | Analogue control device for abutment-free stroke limitation of machine tools An analogue control device with at least one electric stroke control emitter for the abutment-free stroke limitation of machine tools, especially honing machines, with which either a tool carrier or the workpiece connected to the machine tool carries out ... | 10/24/1978 |
| 4117385 | Tracer control circuit A tracer control circuit for guiding a probe around a template comprising analog computers for calculating normalized values of x and y deflection signals and x and y velocity signals. The circuit comprises means for rotating the vector defined by the nor... | 09/26/1978 |
| 3983374 | Digital system for slope and curvature control A digital control system is provided for controlling the indexing of the focussed beam of an ultrasonic transducer over a sloped or curved surface of a workpiece being inspected for flaws. To index the transducer to follow a sloped surface on the workpiec... | 09/28/1976 |
