Patent ID: 7510399

Claim:
A teaching clock, comprising: a base; a circle, the circle recessed within the base; a center block, the center block affixed to the base at the center of the circle; a long pointer and a short pointer, the long pointer and short pointer rotatably attached to the center block, the length of the long pointer defining a first radius from the point at which the long pointer is attached to the center block; a plurality of removable number blocks, each number block displaying a different number; and a plurality of removable color wedges, each color wedge displaying a different color, each color wedge having an aft ached knob, each color wedge capable of being positioned within the circle adjacent to another color wedge, each knob disposed at second radius from the point at which the long pointer is attached to the center block when the color wedge attached to the knob is positioned within the circle adjacent to another color wedge, the second radius being less than the first radius, each knob on a color wedge positioned within the circle thereby blocking the movement of the long pointer as the long pointer sweeps around the circle, each color wedge having at least a first and a second radial edge opening, each radial edge opening disposed to form a portion of a number block hole when at least two color wedges are adjacent, each number block hole sized and shaped to at least partially contain a number block.