Amp LLC

J A Crumley

Ray N Shaak

Robert Charles Swengel, Sr

Charles Roscoe Brummett

John P Weaver

Dewey R Whitaker

Crossbar switch array employs two linear conductors having resistors thereon, with horizontal and vertical crossbar conductors connected to linear conductors between the resistors. All resistors have identical value, so that when a switch is closed, voltage readings taken at one end of each of the linear conductors permit calculation of the number of resistors passing current in each linear conductor where a constant current source is provided. An analog signal is developed which is proportional to the row and column of the closed switch.

Means for decoding a switch array

Ink compositions especially suitable for printing electronic circuit patterns on a substrate such as a flexible polyester substrate; methods for developing electrolessly and electrolytically the circuit configurations as articles of manufacture; flexographic printing with the ink composition has been disclosed as the preferred method.

Printed circuits

A welding method and means is disclosed utilizing a conductive foil disposed between or adjacent members to be welded together with the foil serving as one electrode and one or both of the members serving as another electrode of the welding circuit and with the members being forced together or with the foil being forced against the members by a separate electrode.

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Enola, PA, United States of America

J A Crumley