Wang Laboratories, Inc.

James P Johnston

Alfred M Nelson

Houshang Rasekhi

Frederick A Rupinski

Walter B Hatfield, Jr

Donald L Russell

A device for both entering and displaying information includes imaging circuitry in which a plurality of elements each has a visual characteristic which is visible at a writing surface and which depends on electrically stimulating the element via conductive circuitry, the imaging circuitry is arranged to produce electrical manifestations at the conductive circuitry in response to writing stimuli, and the device also includes control circuitry which delivers electrical signals to the conductive circuitry to form an image and converts the electrical manifestations into digital form.

Information display and entry device

There is provided improvements in magnetic recording head arrangements, such as may employ multiplexing, which provide substantially higher speeds of recording and require fewer components. The recording head is comprised of a compact, four-layer laminate structure mountable on a supporting substrate, in which the entire array of recording elements forms a flexible, uniquely arranged first layer, the return paths of the recording elements comprise a flexible second layer which has the dual utility of substantially reducing the recording element circuit inductance, the third layer is a rigid printed circuit board structure providing a mount for the blocking diodes and the conductive paths of the associated multiplexing scheme, and the fourth layer is a ground plane located between the first and third layers and insulated therefrom for further reducing the inductance associated to the circuitry of the first layer and for substantially minimizing the circuit inductance of the third layer.

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Wharton, NJ, United States of America

James P Johnston