The multi-abacus of claim 1 wherein the first zone beads, the two second zone beads and the four third zone beads nearest the second divider are positioned for use to perform base sixteen calculations.ĩ. The multi-abacus of claim 1 wherein the second zone beads nearest the second divider and the four third zone beads nearest the second divider are positioned for use to perform base eight calculations.Ĩ. The multi-abacus of claim 1 wherein the first zone beads and the two second zone beads are positioned for use to perform base four calculations.ħ. The multi-abacus of claim 1 wherein the first zone beads are positioned to perform base two calculations.Ħ. The multi-abacus of claim 1 wherein the third zone bead of a first color and the other third zone beads are of contrasting colors.ĥ. The multi-base abacus of claim 1 wherein the second zone bead nearer the first divider and the other second zone bead are of contrasting colors.Ĥ. The multi-abacus of claim 1 wherein the first zone bead, the second zone bead of a first color and the third zone bead of a first color are the same color.ģ. A multi-abacus useful for performing calculations in a number base selected from multiple number bases, the multi-abacus comprising: a) a frame b) a plurality of rods positioned parallel to each other across the frame c) a first zone bead positioned on each of at least a major portion of the rods in a first zone formed by the frame and a first divider d) two second zone beads positioned on each of at least a major portion of the rods in a second zone formed by the frame, the first divider and a second divider, the second zone beads being of different colors with the second zone beads of a first color being positioned nearer the first divider than the second zone beads of a second color and, e) five third zone beads positioned on each of at least a major portion of the rods in a third zone formed by the frame and the second divider, the third zone beads comprising one third zone bead of a first color and four beads of a second color, the third zone bead of the first color being located farthest from the second divider wherein the beads are colored and positioned so that the beads used with a particular number base can be readily identified.Ģ. Having thus described the invention, I claim:ġ. Teaching apparatus and method for solving algebraic linear equationsĬombined desktop abacus and electronic calculator Teaching apparatus and method for visually representing mathematical expressionsĮlastic pattern abacus and tool for changing arrangement of abacus beadsĬombined electronic calculator and abacus with deflective guide bars Virtual serial port drivers for Windows XP, Vista, 7, 8,/8.Apparatus and method for scoring dart games High impact ABS housing, dimensions conforming to IEC 62056-21 Magnetic adhesion conforming to IEC 62056-21 Install ABACUS Windows 10 Drivers through Windows Update Feature The Abacus F9U uses “virtual serial port drivers” obtained via Windows device driver update feature that enables use with Windows application software that expects the optical probe to be connected to a conventional RS232 serial port. The F9U’s ABS plastic head protects users from electrical surges when connected to hard-wired optical ports and accidental contact with live wires. The Abacus F9U head contains precision engineered circuitry that converts electrical signals to infra-red light signals that are transmitted and received thru the electric meter cover as specified in International Standard IEC 62056-21 (formerly IEC 1107). The Abacus F9U Optical Probe features a standard USB computer interface and a magnetized head that attaches to the metal ring on IEC tariff meters. Abacus Optical Probes are renowned for their superior reliability and capability of interfacing with virtually all brands of electricity tariff meters. TransData’s ABACUS F9U IEC Optical Communications Probe utilizes infra-red LED technology to provide a galvanically isolated, bi-directional communications link between computers and IEC electric meters for obtaining meter data, performing site diagnostics and making programming changes.
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