Multi-row keyboard for typewriters or similar machines
AssigneeInternational Standard Electric Corporation
InventorsFolker Galaske, Oswald Hack
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Abstract
Keyboards designed in accordance with ergonomic viewpoints are slightly dished transversely in relation to the longitudinal direction and the key surfaces have a slope tending toward the dished shape. According to the invention, this arrangement is accomplished with the aid of adapters located between the key element plungers and the keyheads. For each row of keys there is provided a special type of adapter. The types of adapters differ from one another in their effective heights and in the slope angles of the supporting surfaces for the keyheads.
Claims4
A multi-row keyboard for typewriters or similar machines comprising a set of keys arranged in an inclined position (.alpha.) and comprising a plurality of individual keys arranged in parallel, longitudinally extending rows, each said key comprising a key element having a plunger and a keyhead connected to said plunger, the center points of the upper surfaces of said keyheads lying in a plane dished transversely in relation to the longitudinal direction of said rows of keys, wherein the improvement comprises:
- said keyheads of all rows of said set of keys all having the same shape;
- an adapter being located between each said plunger and its associated keyhead;
- the heights of said adapters differing from row to row of said keys;
- and
- said adapters having supporting surfaces for their respective keyheads having a slope (angle .beta.) differing from row to row of said keys, said slope angles of said supporting surfaces being selected to cause said upper surfaces of said keyheads to lie in said dished plane.
Dependencies are inferred from the claim text.