Pressure sensitive stylus pen
Patent 5565632 Issued on October 15, 1996. Estimated Expiration Date: 
May 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 26, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCoordinate input device with display Position detecting device Coordinate input device with display Coordinate input device with display Coordinate input system and input implement used in the system Patent #: 5134689 InventorAssigneeApplicationNo. 452345 filed on 05/26/1995US Classes:73/862.69, By measuring magnetic properties73/862.041Responsive to multiple loads or load componentsExaminersPrimary: Chilcot, RichardAssistant: Biegel, Ronald L. Attorney, Agent or FirmForeign Patent References
International ClassG01C 001/00Foreign Application Priority Data1995-02-20 JPAbstractA stylus which has a pressure sensitive arrangement for reliably sensing a depressing force although the stylus being slantingly disposed, by using inductance change generated from an interval displacement between a moveable magnetic body and a fixed magnetic body, which has a coil wounded around thereof and is disposed at a predetermined distance from said moveable magnetic body. The arrangement has a pen tip member having a contact portion for receiving the pen pressure; an elastic material member disposed between the moveable and fixed magnetic bodies; a first supporting device disposed to hold the position of the fixed magnetic body against a depressing pressure; and a second supporting device for supporting the depressing member in a condition established when the rear end plane of the moveable magnetic body and the front end plane of the fixed magnetic body are placed with each other in a parellel position by receiving the depressing pressure. | |
