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: A mechanical calculator employs a register consisting of gears. Each register gear has two sets of teeth. One set has teeth all around the circumference of the wheel while the other set consists of a single carry-over tooth. The register gears are spaced widely enough apart that they do not engage one another. An intermittent carry-over motion is transmitted from one register gear to an adjacent register gear by a selectively insertable and removable carry-over gear, which is mechanically unconnected to the remainder of the calculator. The operations of multiplication and division are enabled by a set of individually selectively insertable and removable multiplying gears. The number of teeth on these gears, and their diameters, are integral multiples of those on the register gears. The multiplying gears are mechanically unconnected to the remainder of the calculator.