Bell Telephone Laboratories

At&t Bell Laboratories

American Telephone & Telegraph Co., At&t Bell Laboratories

Peter Steve Kubik

Harold G Alles

David W Hagelbarger

Mehdi Hatamian

Arun N Netravali

Zigmantas Leonas Budrikis

Douglas L Bayer

Robert V Anderson

A light pen which includes a transparent rod at its pointing end through which light is directed to a photodetector that is fixedly positioned within the light pen. The rod is spring loaded and axially slidable in response to applied pressure, resulting in different light intensities being applied to the photodetector and further resulting in an output voltage generated by the photodetector that is directly related to the applied pressure.

Pressure-sensitive light pen

A touch sensitive device is arranged with substantially parallel surfaces inside which light from a synchronized source, such as a CRT, can become trapped by total internal reflection. The screen is fitted with photodetectors which respond to the entrapment of light within the surfaces. The device is compliant so that a touch of the device at a particular point will cause an inward deflection of the surface at that point. The deflection causes light to become entrapped within the surface by total internal reflection thus making it possible, by comparing the photodetector output with the CRT raster position, to determine the exact surface position of the touch.

Deformable touch sensitive surface

General-purpose electronic telephone set base

The power of computer-based services is made available to telephone subscribers by a telephone station set (10) including a telephone handset (17) for audio transduction, a video output display screen (13) and manual input key facilities (16,20,23) coupled for interaction by a data processing facility (43). All of those elements are included in a common station set housing for programmable interaction under control of the station set user. The input key facilities include a full ASCII key set, additional buttons (30-32) for signaling standard computer service functions, and keys (16) for user selection of predetermined different text portions of the display screen. Also shown are various electrical and mechanical features which facilitate the combining of the functional parts into the common housing and illustrative processes (FIGS. 8-12) for demonstrating the programmable facility interaction.

General-purpose electronic telephone station set

A character applying device which is controlled by a separate signal processor can be manually moved across a writing surface while the characters are being applied. A single-tipped marking instrument is moved with a prescribed motion parallel to the surface as the device is moved across the surface to create a relatively dense array of line patterns. Simultaneously, received control signals cause the tip to move in and out of contact with the surface for, in effect, masking the array to produce characters represented by those signals.

Electric-signal controlled hand-held printer

A quick connect wiring system for breadboard circuit applications includes a circuit board having a plurality of apertures therethrough. A number of electrically conductive connectors, each comprised of a hollow cylindrical shaft having a pair of insulation penetrating quick connect contacts emanating from one end thereof, are inserted into the apertures in the board. Opposite ends of each of the connectors have integral therewith oppositely directed spring members for engaging integrated circuit package terminals. Insulative members partially surround the connectors to provide conductor support, to improve the electrical isolation among the termination points, and to reduce exposure of the termination points to environmental contamination.

Quick connect wiring system for breadboard circuits

An identification device for a printed circuit board, having a plurality of wirewrap terminals, includes a base portion and a plurality of flexibly mounted, raised identification projections. The base portion has provision therein for securing the device to spaced-apart rows of generally parallel terminals. When the device is in place, the flexible mounting arrangement for the identification projections permits ready access by a wirewrap tool.

Circuit board terminal identification device

A tool for extracting an integrated circuit package from a circuit board is disclosed. The tool has provision for converting a user applied compressive force into two components. One component actuates apparatus for grasping the underside of the circuit package while the other component produces a nearly uniform perpendicular force on apparatus which straddles the circuit package to effect the extraction.

Growing community of inventors

South Plainfield, NJ, United States of America

Peter Steve Kubik