Keyboard actuatable with the aid of the fingers of at least one hand
Patent 4201489 Issued on May 6, 1980. Estimated Expiration Date: 
January 12, 1998. 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.
January 12, 1998. 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 1336151 2532228 2803714 3271532 3452850 3627097 3815066 3854109 Magnetic key touch control Miniaturized calculator keyboard switch assembly having universally pivoted key actuators InventorAssigneeApplicationNo. 05/868930 filed on 01/12/1978US Classes:400/485, Key-board having multiple-character, multiple-movement keys200/6A, Universally pivoted handle335/207, Plural magnets400/479.2, Electromagnetic-responsive switch400/489, Key-board including keys grouped to facilitate positioning of typist's fingers400/715Attachment for guiding fingers or hands of typist (e.g., hand rest)ExaminersPrimary: Pieprz, WilliamAttorney, Agent or FirmInternational ClassesB41J 23/00 (20060101)B41J 5/28 (20060101) B41J 23/32 (20060101) B41J 5/00 (20060101) B41J 5/10 (20060101) H01H 13/70 (20060101) H01H 36/00 (20060101) Foreign Application Priority Data1976-08-04 CHAbstractA keyboard which has support frame, or several rows of key units. Each key is movable out of an initial inoperative position by the tip of the index finger. The key of each key unit of a guide key row has a key rod and a top face on one end of the key rod. The tip of a finger rests at random pressure on each top face as, at the opposite end of the key rod, a non-depressable mounting is articulatedly lodged in the support frame and prevents downward depression of the key while permitting tilting toward one or more operational positions.Each key unit of the guide key row has a magnetic pole to exercise a determined initial attraction on the top face-bearing end of the key rod an doppose tilting movement of the key away from the attracting means, when this movement is initiated by a finger tip.A stop prevents the magnetic pole on the opposite key side from following the tilting movement of the key, whereby the attractive force of the magnetic pole decreases as the distance of the key therefrom increases due to the process of the tilting movement of the key, so that the finger tip continues to tilt the key involuntarily further until the key is fully shifted to the operational position.Other References
Field of SearchKEY-BOARD OR KEY LEVER-ACTUATING MECHANISMIncluding mechanism (e.g., auxiliary key-board) for activating keys Electromagnetic key-board-drive mechanism Via electrical component (e.g., switch, stylus, etc.) in or with key-board Key-board having multiple-character, multiple-movement keys Key-board including keys grouped to facilitate positioning of typist's fingers Attachment for guiding fingers or hands of typist (e.g., hand rest) | |
