A workstation for computer-aided design comprises an L-shaped main support frame having a monitor support panel which is both tiltable and slidable fore and aft. Connected between the horizontal elements of the L-shaped support frame is a secondary support frame carrying a digitizer support and a keyboard support. The keyboard support is forward and below the level of the digitizer support. The digitizer support is slidable fore and aft on the secondary frame, and the secondary frame itself is s...

A computer access system includes a password generator (10) and an lock computer (50) connected to receive passwords generated by the password generator and grant access to a host computer (52) when a password from the password generator (10) matches a password separately generated by the lock computer (50). The password generator (10) and the lock computer (50) have corresponding pseudo-random number sequences stored in memories (26 and 90). The password generator (10) and the lock computer (50...

A corner mounting unit for a computer and like equipment quickly attaches to two adjoining surfaces at the same height. The mounting unit includes a frame having a slightly elevated plate with attachments positioned at selected locations whereby computer components or accessories may be positioned and firmly supported directly or indirectly at any of such variety of locations. A keyboard or bridging surface is captured by the frame and extends forwardly of the unit at a lower elevation and bridg...

In combination with a digital computing machine the computer card is formatted by the user to include an audio portion and a visual portion of an interpersonal-social communication. The composite communication is transmitted by the user to a recipient through a computerized central mail exchange apparatus or created on removable, transportable magnetic media, such as a floppy disk, insertable into and readable by the recipient's audio and visual display device whereby a synchronized audio and vi...

In combination with a digital computing machine the computer card is formatted by the user to include an audio portion and a visual portion of an interpersonal-social communication. The composite communication is transmitted by the user to a recipient through a computerized central mail exchange apparatus or created on removable, transportable magnetic media, such as a floppy disk, insertable into and readable by the recipient's audio and visual display device whereby a synchronized audio and vi...

A range computer for use in a dual source input ranging system where a signal representing the difference between the dual sources is fed to a differential amplifier together with a normalizing signal from one of the sources. A null-seeking servo fed by the differential amplifier parallel drives an input potentiometer controlling the input level of the normalizing signal to the differential amplifier and an output potentiometer controlling the volume of a DC reference voltage, the output of the ...

A computer circuit for generating signals related to the ballistics of a plurality of projectile or ammunition types, the signals including time of flight, superelevation, and ballistics drift signals. The computer includes a plurality of parallel channels, including a first adjustable multiplier circuit, which operates on the range information by a selected ballistics normalizing transfer function to generate an individual normalized range signal for a selected individual one of the plurality o...

A computer for solving aerial navigational problems in which the effect of wind speed and direction must be taken into account, wherein calibrated drift marks are provided in association with the airspeed scale. When the computer is set to any given airspeed and the information relating to wind speed and direction is registered, the calibrated drift marks give an immediate reading of the corresponding drift angle. The computer comprises a number of superimposed concentric discs which are mutuall...

An instrument for solving mathematical problems and involves nomograms that enable the manipulation of a straight line to read off the value of a dependent variable when the value of an independent variable is given, thereby computing by means of graphic representation systemmatic solutions to said problems capable of numerical calculation. With this invention there are immovable scales and it is the calculating line that is moved by manipulation to intersect the said scales at read-off points w...

An integrating computer is disclosed which continuously computes time of deviation from that elapsed time which would be required to maintain a preselected average speed over the distance actually traveled. A preselected current which is an inverse function of the preselected average speed is applied to an integrator for a preselected interval each time a unit of distance is traversed. A current in the opposite direction is applied to the integrator continuously to represent the passage of time....