Modular calculator with separable keyboard and display modules

Details Modular calculator with separable keyboard and display modules Modular calculator with separable keyboard and display modules

1980-05-30

1983-04-05

Malzahn, David H.

Boots, shoes, and leggings

G06F 1502

Patent

active

043793363

ABSTRACT:
A modular calculator system using interchangeable input modules and output modules provides several different calculators using the same output display components to avoid expensive duplication of parts. The input module contains the calculator keyboard and program-control circuits which establish predetermined calculator functional capabilities, such as basic arithmetic or scientific functions. The output module houses and drives a printer and visual display components. Data from the input module is communicated serially over a single line to the output module so that a single reliable and inexpensive electrical connection may be used. An overlapping flange mechanical coupling physically connects the modules to form a combined unitary calculator housing.

REFERENCES:
patent: 3971925 (1976-07-01), Wenninger et al.
patent: 4038535 (1977-07-01), Aldridge et al.
patent: 4220992 (1980-09-01), Blood et al.
patent: 4259668 (1981-03-01), Nishimura et al.
Specifications for Impact Dot Matrix Mini Printer Model-210, C. Itoh Electronics, Inc., 280 Park Ave., N.Y., N.Y., Feb. 23, 1979.
Sharp 2L-6000 Electronic Calculator, sales brochure 6Y50E, Sharp Electronics Corp., Paramus, N.J., 1979.
Markline Spring 1980 Catalog, Markline, Waltham, MA, 1980, pp. 4 & 13.
Office Product News, vol. 14, No. 7, Dec. 1979, p. 4.
Monroe 2850, sales brochure 2044A, Monroe, Morris Plains, N.J., 1978.
IC Master 1980, United Technical Publications, Inc., Garden City, N.Y., 1980, pp. 2311-2322.

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