US 4,994,656 A · Logic design slide rule

Abstract

A logic design slide rule comprises, in a preferred embodiment, front and rear cover plates coupled together; interior slide channels formed between the covers; and a plurality of slides disposed between the covers and able to move horizontally from left to right within the channels. The slides may be moved to display indicia on beams for observation through a single column of truth-table windows and to display corresponding indicia printed on interior slide plates for observation through an array or grid of K-map windows, which column and grid of windows are located in the front cover of the slide rule. Indicia are also displayed through a set of output variable slots, preferably in the rear cover. Operation of the preferred slide rule will aid the designer to obtain a minimum set of combinational logic functions for up to four input variable from a given truth-table.

Claims13

Dependent claims

A slide rule for displaying indicia including:

front and rear planar covers spaced apart from each other and having means for viewing indicia;
a plurality of slides having front and rear slide beam surfaces, the slides provided in a space between the covers so as to be slideably moveable with respect to the covers;
and
a plurality of indicia display plates attached to the front beam surfaces of the slides, at least one plate to a slide, the plates sandwiched between the front beam surfaces of the slides and the front cover.

1 more element

Dependencies are inferred from the claim text.

Logic design slide rule

Life of this patent

Logic design slide rule

Life of this patent

Abstract

Claims13