Abstract: An aerator or destratifier used in small bodies of water is provided with a sealed flotation chamber in which a motor is completely housed. A stationary shaft runs between the top and bottom surface of the flotation chamber onto which the motor is mounted. A plurality of paddles is externally affixed to the exterior surface of the flotation chamber. A V-belt, a chain or a gearing arrangement is provided between the motor and the internal surface of the flotation chamber which will enable the flotation chamber to constantly or intermittently rotate. The plurality of paddles would then agitate the body of water and allow oxygen to be dissolved therein.

Abstract: An aerator or destratifier used in small bodies of water is provided with a sealed flotation chamber in which a motor is completely housed. A stationary shaft runs between the top and bottom surface of the flotation chamber onto which the motor is mounted. A plurality of paddles is externally affixed to the exterior surface of the flotation chamber. A V-belt, a chain or a gearing arrangement is provided between the motor and the internal surface of the flotation chamber which will enable the flotation chamber to constantly or intermittently rotate. The plurality of paddles would then agitate the body of water and allow oxygen to be dissolved therein.

Abstract: A magnetically controlled steel ball armature functions as a clapper to strike a gong. A positionally adjustable permanent magnet polarizes the ball and positions it relative to the gong. An electromagnet modulates the magnetic field of the permanent magnet to drive the ball strikingly against the gong. Bell tap is suppressed by adjusting the position of the permanent magnet relative to the gong.

Abstract: A volume control device suitable for installation on the ringer of a telephone incorporates a tone control lever having a damping element cantilevered therefrom and extending as a wing from a point of pivoting in a direction generally parallel to a frame of the ringer. The lever further comprises an arm bent through the frame to serve as a handle, and a leg extending in an opposite direction from the pivot for contacting a detent structure integrally formed with the frame. Also, integrally formed with the frame, are a ramp and a guide. The guide extends upwardly from the frame and then over a path of travel of an outer end of the wing for urging the wing downward so as to ensure passage of the wing underneath a rim of the gong during a rotation of the lever about the pivot.