Disclosed is a diving computer in the form of a circular slide rule for aiding a SCUBA diver in planning one or more dives within a short amount of time, including more than one depth per dive, so that the diver may avoid risking decompression sickness. The computer has two faces, one of which calculates the increase of pressure within body tissues during a dive and the other of which calculates the decrease of this pressure after surfacing. The result of one side's calculation is used as the in...

A fare computer for a taxi, a freight carrier, or other use calculates the fare, display the fare as it accrues and displays visual representations of each charge contributing to the accrued fare. The fare computer is particularly suited for use in those localitites in which the taxi fare is based upon zones of travel, in accordance with a zone tariff schedule, rather than on total distance travelled. In a first mode, or ZONE TARIFF MODE, the fare computer calculates the fare from primary charge...

A video computer system which can comprehend data for automatic data-processing operations and more specifically for automatic identification of data obtained by input devices, the system being suitable for automatic data-processing operations and applications.

A computer which is portable and transportable by a person and which can be used on a table, can also be coupled with a support affording the possibility to use the computer in further operating conditions, particularly for use in vehicles. The support comprises a securing means affixed in the cab of a vehicle as well as a height adjustment arrangement for adjusting the computer's height in the cab when attached to the support. Also the support includes pivots so the computer is adapted to be pi...

A computer system has a system bus with several sockets or slots therein which receive memory modules. Each module can be used to implement at least one of a variety of functions. The functions include operating system programs, application programs, and random access memories (RAM). Each slot has a module select line coupled to it at the same location. A module select circuit is provided which enables the module select lines to select the appropriate module or modules. Modules implementing the ...

A computer control includes a control member movably mounted for movement in two dimensions wherein orthogonally related gratings are moved to the corresponding directions to generate pairs of quadrature related signals. Circuitry produces binary signals defining four states for each cycle of quadrature signals to change a corresponding count indicating position of the control member. In another variation patterns each having a plurality of spots with a unique combination of gray levels are sens...

In the disclosed portable computer, a keyboard with keys for entering at least a full alphabet and ten digits is coupled to a computer system that includes a central processing unit which is in turn coupled to a display arrangement with a liquid crystal display. The entire computer is mounted in a case composed of a base and a cover hinged to the base. The base houses the computer system and the keyboard, and exposes the keyboard for operation by a user when the cover is open, while the cover ho...

A computer system comprises a memory for storing communication history information between a terminal and an execution program, and an output message file for storing sets of communication history conditions and output messages corresponding to those conditions. When the terminal issues a message output request, only the output message that meets the communication history condition is selected from the output message file and outputted to the terminal.

A piece of computer furniture is provided and consists of foldable and hingable components which when closed is used as a flat top table and when open will present computer equipment in their proper positions to be used.

An apparatus for carrying by a diver while under water (and at the surface between dives) provides information useful for enabling the diver to ascend therefrom both expeditiously and safely in order to avoid decompression sickness. A corrosion-resistant ceramic transducer (60) provides an electrical capacitance responsive to the pressure of the water thereon, in an electronic circuit (52), comprising also a resistance (61), for providing a signal (at 53) responsive to the time constant therein ...