Typewriter instruction device
Patent 4465477 Issued on August 14, 1984. Estimated Expiration Date: 
August 4, 2003. 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.
August 4, 2003. 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 References 3080661 3166856 3277587 3894346 Teaching typewriter Terminal trainer keyboard and display apparatus for teaching keyboard operations and knowledge items Patent #: 4378217 InventorApplicationNo. 06/520143 filed on 08/04/1983US Classes:434/233Means on hand or finger for indicating finger to be usedExaminersPrimary: Grieb, William H.International ClassG09B 13/00 (20060101)AbstractA typewriter instruction device is provided wherein the student has small ferromagnetic tips at the ends of his fingers while the typewriter keys have electromagnets which attract the student's correct finger when an instruction to type a certain key is given. In accordance with a preferred embodiment of the invention, permanent magnets are employed at the fingertips with alternating polarities on adjacent fingertips, while the electromagnets have reversed alternating polarities, so that the correct finger is not only attracted to the proper key but adjacent fingers are actually repelled.Field of SearchMeans on hand or finger for indicating finger to be usedKeyboard operation (e.g., typing, key punching, etc.) Means for selectively illuminating character on simulated keyboard Means for selectively rendering key operable or inoperable Means for selectively producing sound of character Practice keyboard having individually depressible keys With means to display character upon depression of key | |
