Patent:US4450615
Patent: | US 4450615 |
Title: | Method of fabricating a hand calculator |
Date: | 29.05.1984 |
Place: | Dix Hills (N.Y.), USA |
Country: | USA |
Person: | Pickios, Anthony G. |
Company: | |
Internal Links: | Fraction of an Inch Adding Machine |
Keywords: | |
Link to the patent office: (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.