Abstract: The present invention relates to a charging generator control system comprising a generator which includes a field winding, and an armature winding being in three-phase connection to generate an A.C. output; a rectifier which rectifies the A.C. output from said armature winding of said generator; a battery which is charged with a D.C. output from said rectifier and which can supply an exciting current to said field winding; a separately-exciting power source which generates a D.C.

Abstract: Motor-driven movement for timepieces wherein stator block core is formed in ring-shape with a magnetic material of a rounded bar, magnetic poles formed at both core ends are disposed as directed radially inward of the core and rotary shaft of minute hand wheel of output gear train meshing with a rotor disposed between the poles is radially displaced from the center of the core to the side opposite the magnetic poles, whereby internal space of the ring-shaped core having a coil wound thereon is efficiently utilized for arranging all internal components substantially within dimensions of the coil and minimizing the entire size of the movement.

Abstract: A step motor comprising a stator made by bending a bar-shaped and magnetically highly permeable material into a substantially U-shape which is straight in one leg and curved in the other leg so that the magnetic flux distribution accompanying the curved leg will have a single ridge and the nearest and second nearest distances g.sub.1 and g.sub.2 of the curved leg from a rotor and the distance g.sub.3 between the straight leg and the rotor will maintain such relations as 1.2.ltoreq.g.sub.2 /g.sub.1 .ltoreq.1.8 and 2.1.ltoreq.g.sub.3 /g.sub.1 .ltoreq.3.5, the stator being secured to a main plate as inserted at the curved leg partly into a groove made in the main plate. A part of the curved leg defining the distance g.sub.1 is made to be a tip end part of the curved leg, the width at a part of the groove in which the tip end part of the curved leg is inserted to be secured to the main plate is made to be of the stator width and the groove width at other parts is made comparatively larger than the stator width.

Abstract: A dirt remover for a water tank, which can readily remove not only the dirt floating on the water surface and the dirt suspended in the water but also the dirt settling to the tank bottom without inflicting any injury on the bottom surface of the tank, includes a frame formed of a rear frame member, two lateral frame members extending forward from the opposite ends of the rear frame member, and a frontal frame member set in position straight between the leading ends of the two lateral frame members. A net is hung from the inner sides of the frame loosely enough for the middle portion thereof to sag down, the net forming a scooping portion in conjunction with the frame. A handle has a leading end thereof attached to the rear frame member of the frame, the handle serving for the operation of the scooping portion.