A node is provided in an information distribution system having a plurality of nodes capable of performing communication with each other via a network and in which at least one piece of distribution information is copied and stored into a plurality of nodes, the node managing node information indicative of a node that stores the copied distribution information. The DC brushless motor includes a controller, magnetism sensors, a stator with stator windings and a rotor assembly connected to the fan and having permanent magnets interacting with the stator windings. The projection lens unit does not interfere with a beam when the thickness of the projection system is decreased. A movable middle light fixture reciprocates along the length of the relaxation chamber. A mounting plate is provided near to the crank between which and the second of the lower mountings, a ram and cylinder arrangement is connected.