Abstract: An educational board game includes a playing board, a plurality of cards, a die and a die launcher. The playing cards are separated into categories and the die has a plurality of colored faces, each color corresponding to a particular category. The die is placed on the launcher and a bellows-type pedal is depressed, thereby launching the die. The color displayed by the die represents the category of card to be taken. Each card has a challenge question or task disposed thereon which a user has to answer or perform. If the user answers the question correctly a game piece is moved on the playing board. The first game piece to advance through the playing board is the winner.

Abstract: A solid fuel furnace includes a vibratory bowl for its fuel bed. Structure in the furnace defines a fuel chamber over the central part of the bowl and a combustion chamber over the outward part of the bowl. Fuel is distributed outward by a central cone on the bowl. Primary air is fed beneath the rim of the cone into the fuel in the combustion chamber. The vibratory motion keeps the fuel particles evenly distributed and prevents blowholes from developing, leading to improved combustion. The vibratory motion also marches ash particles up a spiral groove in the circumferential wall of the bowl to facilitate ash removal from the fuel bed.

Abstract: A vibration bed (1) is assembled together of a plurality of rigidly connected frames (2) extending in the feed direction (A) of the material to be burned. The frames have projecting sides (10) extending downwardly and in the feed direction. Two effectively synchronously driven vibration generator arrays (12, 13) are located on the downwardly extending projection or extensions, each one of the arrays (12, 13) has a plurality of axially serially arranged vibrators (7); preferably, every other frame has a vibrator associated therewith, and the number of frames is odd, the vibrators of one group being connected by a continuous shaft, energized by a drive from the axial ends.