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Patent:US4450615


Brevetto:US 4450615
Titolo:Method of fabricating a hand calculator
Data:29.05.1984
Luogo:Dix Hills (N.Y.), USA
Nazione:Stati Uniti
Persona:Pickios, Anthony G.
Ditta:
Link interni:Fraction of an Inch Adding Machine
Keywords:
Link al brevetto:
(without guarantee)
 US4450615 (espacenet),  US4450615 (uspto)


Filing date: Jun 7, 1982
Issue date: May 29, 1984

A method of fabricating a hand calculator utilizing die press punching to form its three parts. A circular stationary base plate is punched with a central, circular, raised, beveled portion which is then rigidly fixed to a circular stationary top plate by means of flared eyelets. Between these two parts a circular movable scale plate is movably inserted. The scale is etched with scales, and punched with a plurality of holes about its periphery to allow for pencil point movement.