Abstract: A device (1) for purification of water driven by gravity through a purification unit between an upper dirt water container (2) and a lower clean water tank (3). A backwash system may be integrated, the system comprising a receptacle (8) for accumulation of the backwash water to prevent consumption thereof by mistake.

Abstract: The present invention provides an actuation system for the pedal system of a keyboard instrument. The system includes an actuator with block of ferromagnetic material having a bore, a coil disposed in the bore, and a piston surrounded by the coil, the piston is in mechanical communication with a pedal rod. When the actuator is energized, the piston moves relative to the coil, thereby moving the rod.

Abstract: A pedal is switched between a normal position and a low position, which is reached by depressing the pedal downward from the normal position with toes of a foot of a user. A pedal locking unit switches the pedal between a locked state in which the pedal is locked at the low position and an unlocked state in which the pedal is released from the locked state. A lock switch plate switches the pedal locking unit to the locked state. An unlock switch plate releases the pedal from the locked state of the pedal locking means. The lock and unlock switch plates are located beside the pedal to be operable by a heel of the foot.

Abstract: A base drum pedal assembly is disclosed and includes a foot pedal for operating a beater head, the foot pedal including a foot plate which is slidably mounted on a support coupled to the beater head and which is biased towards a rest position. In use, the player depresses the foot pedal and can, at the same time, slide the foot plate forward against its biasing. At the end of a stroke, the pedal returns upwardly and the foot plate is returned to its rest position by said biasing means.