Abstract: A clock useful for instruction in how to read time comprising a face and two sets of numbers, the first set including integers one through twelve and the second set including integers zero through fifty-nine, positioned about the face and contained within differently colored bands first and second distances, respectively, from a center point of the face. The clock includes an hour hand colored the same as the first band and a minute hand colored the same as the second band rotatably attached to the face at the center point and extending to the first and second sets of numbers, respectively, the minute hand being longer than the hour hand. The face is divided into twelve equally sized segments, each of which is further divided into five equally sized sub-segments, beginning at the top center of the face and proceeding in a clockwise direction.

Abstract: The present invention is directed to an apparatus and method for teaching addition and subtraction. The apparatus includes a game board, a plurality of movable dowels having predetermined lengths with spaced apart indicia marked thereon, and a number generator such as a pair of dice. The game board has a pair of spaced apart dowel receiving rows corresponding to "in play" and "out of play" positions. The rows may also include a plurality of pegs for supporting the dowels in a vertical position. In addition, optional segmented slots enable the player to lay the dowels vertically end to end on the game board without having them roll off of the board if the game is played on a surface which is not level. The separation distance between adjacent slot segments slots and the indicia associated with the dowels assist the player with the addition and subtraction computations. The game board also includes a plurality of dice receiving spaces and aligned with the slot segments.

Abstract: A locking device for sliding doors and/or windows and comprising a pair of bar or tube assemblies hingedly secured in end-to-end relation and having an internal spring urged slide apparatus engagable with the two tube assemblies for locking thereon in the extended position therebetween, the slide apparatus being movable for disengagement with one of the tube assemblies whereby the tube assemblies are free to pivot about the hinged connection to permit opening of the door and/or window, the slide apparatus also being movable to a first position for locking the tube assemblies in the extended position, and to a second position for precluding accidental locking of the tube assemblies.