Abstract: An electronic calculator for determining truck driver log book values including a liquid crystal display. Also included is a conventional numeric keypad having a matrix of numeric keys for allowing the entering of value signals representative of whole numbers upon the successive depression of the numeric keys and subsequent depression of an enter key.

Abstract: A Biorythms analog computer-calendar is provided to display without computations the level of the physical, the emotional, and the intellectual biorythms of a human body. The level of the three biorythms appears on display in analog and digital forms for any dialed calendar date, if the computer-calendar is set initially with the individual's birth date. The analog elements used to register the three biorythm levels are drums attached to gears with a number of teeth equal or proportional to 23, 28 and 33, or to the period of the three biorythms respectively. A calendar arrangement is introduced to create a correlation between the displayed biorythm levels and the calendar date associated with them.

Abstract: The disclosure describes a shrinkage compensated measuring device comprising a first scale calibrated in units of length, e.g., inches or centimeters, and a second scale calibrated in units of percent shrinkage. Each point on the second scale corresponds to a unique point on the first scale and indicates the percent difference between a reference point on the first scale and the unique point on the first scale. The shrinkage device also comprises a first array of lines, each line of the first array corresponding to a unique percent shrinkage, and a second array of lines extending across the first array such that the distance between any two lines of the second array as measured along one of the lines of the first array is inversely proportional to one minus the percent shrinkage corresponding to that line of the first array divided by one hundred.

Abstract: A calculator of flat design with a surface chart showing marginal scales and diagonal inner ones. The top of the calculator serves as a cover attached marginally to a case underneath. Also, the top has a diagonal slot, and is surmounted by a flat pointer which has a similar slot, and can be slid and rotated to relate to numerical values in the scales. An axial post is installed to pass through and be movable to any desired point in the slots, with means disengaging the post by finger pressure for movement away from said point.

Abstract: An aircraft traffic pattern computer employing a slotted frame having a window surrounded by a compass rose which is movable in relation to the frame about a pivot point, the slotted frame being adapted for holding a placard having a pair of surfaces upon which various aircraft movement patterns are shown about a reference point and a reference line such that alignment of the reference point with the center of the compass rose and alignment of the reference line with the compass rose proper provides at least one selected course heading for an aircraft.

Abstract: A calculator is described which greatly simplifies the calculation of the required feeder head parameters, e.g. size, amount of antipiping compound, in casting metals. Only the size of the casting section being fed and the normalized inscribed circle relating thereto need to be measured.

Abstract: A method and computational aid for determining the optimum cycle lengths for use in a vehicular traffic control system wherein inbound and outbound traffic flow are equally favored. The method employs the technique of determining optimum cycle lengths by utilizing harmonic relationships found to exist between the time separations of the controlled arterial intersections and other key traffic control parameters. The method may be practiced by means of a highly simplified graphical computational aid which provides a clear visual indication of candidate optimum cycle lengths for a particular group of intersections which requires only prior knowledge of intersection relative locations. The unique format of the graphical computational aid provides, in addition to the candidate optimum cycle length information, a visual indication of the quality of the candidate solution obtained for each of the controlled intersections of the group.

Abstract: This invention relates generally to graphic calculating methods and apparatuses, and in particular to an apparatus by which the values and other factors pertaining to bonds, stocks and other securities may be calculated when certain values and other factors are known.Heretofore, it has been customary to calculate certain values or factors of bonds and the like, given or knowing other values or factors, by mathematical computation according to certain formulas or by the use of certain tables. These methods have, of course, been accurate and have proved to be satisfactory except that in carrying them out, it has been necessary to do considerable work and up to now they have not incorporated all significant values or factors. The primary object of the present invention is to provide a simple device by the use of which certain values or factors of bonds and the like may be quickly ascertained without mathematical computation and, if they were available, without the use of tables.

Abstract: A device for selection of compressors, condensers, expansion valves, and evaporators for air conditioning or refrigeration systems.

Abstract: A stock trend indicator and method of using is disclosed. The manipulable instrument is used with a standard stock chart to forecast an evaluation of future stock behavior.