Litton Business Systems, Inc.

Unisys Corporation

John N Johnston

Myron Beitler

Disclosed is a tilt/swivel mechanism for supporting a display monitor. The mechanism includes separate tilt ball and pedestal assemblies which may be snapped together without the use of tools. In like manner, any one of various monitors may be snapped onto the tilt ball assembly to provide a complete data display system.

Tilt and swivel assembly for terminal monitor

Calculator keyboard module

A calculator having a keyboard alterable by interchanging various keyboard modules is provided by an arrangement wherein a module is insertable into a floating connector which adjusts the space allowed for the module to the size of the module and which provides reliable electrical connection to a main keyboard. Each module is insertable and removable with one hand by providing a resilient camming member attached to the calculator, which mechanically interacts with a locking and releasing member which is connected to the module and is accessible when the calculator is resting on a desk.

Calculator having a modular keyboard

An electronic calculator utilizing a programmable read-only memory (PROM) cartridge for control of a number of the calculator functions is provided with a bezel which is snap-fit into a keyed opening in the calculator housing and guides a connector on the cartridge into simple and reliable electrical connection with a connector in the calculator. The bezel, which is simply and inexpensively constructed of plastic, has at least one bevelled outer surface to insure proper orientation of the bezel in the keyed opening and has at least one bevelled inner surface which cooperates with a corresponding bevelled outer surface on the cartridge to prevent improper orientation on the cartridge during insertion thereof into the bezel. The cartridge cover is also simply and inexpensively constructed of plastic, has self-aligning parts, and may be assembled by using a single screw.

Cartridge and bezel assembly for a calculator

An acoustical noise attenuating platen for an impact printer including lead material fastened with a thermoplastic compound to the rear surface of a non-rotatable bar.

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North Plainfield, NJ, United States of America

John N Johnston