PROBLEM TO BE SOLVED: To provide a motor which dispenses with phase switching mechanism and circuit and is inexpensive.

SOLUTION: This motor has a nonmagnetized part 101 disposed in the circumferential direction at the same angle as that of each of magnetized parts 124S, 124N, and a magnetic part 112 has three-phase constitution in which a set of the respective magnetized parts 124S, 124N and the nonmagnetized part 101 is opposite to each other with an equal pitch in three places in the angle of the circumferential direction, and in the connection of windings 113A1, 113A2, 113B1, 113B2, 113C1, 113C2, the direction of one-phase winding is reverse to the direction of the other two-phase winding and three-phase windings are connected in series.

COPYRIGHT: (C)1997,JPO

PROBLEM TO BE SOLVED: To prevent the occurrence of a circular arc-shaped cutting mark at one end of a square-shaped perforated hole at the time of perforating a timer or the like and to easily draw or insert a hollow chisel body and a hollow chisel drill.

SOLUTION: A hollow chisel body 10 is formed in a hollow square-shaped cylindrical shape having a side of 30mm at the outside aixd a diameter of 24.5mm at the inside, and has a square blade 11 having a blade and a body 12 at the end having a predetermined length. A mounting part 13 is coaxially integrally provided at the end face of the body. A hollow chisel drill 20 has a cylindrical drill body 21, and a shank 23 of a round rod disposed at its one end. A ring-like bearing 24 having an outer diameter of 24mm is disposed at the shank side end of the drill body. Thus, at the time of perforating a timber, the radial deflection of the body 21 when the end of the chisel is brought into contact with the knot of the timber is suppressed by the bearing 24. Since the outer diameter of the bearing 24 is made smaller than the inner diameter of the body 10, the drawing and inserting of the drill 20 from and to the body 10 is facilitated.

COPYRIGHT: (C)1997,JPO

PROBLEM TO BE SOLVED: To uniformly and satisfactorily reflux a working fluid to an internal peripheral surface of an evaporation tube by fitting a rotator including an injector opened substantially in the tangential direction to a fluid return tube, and supplying the working fluid of liquid phase into the rotator.

SOLUTION: For operating a thermosiphon 11 a valve 19 is opened to a predetermined degree. Hereby, a working fluid 16 accumulated in a reservoir 18 flows down along the wall surface of an evaporation tube 13 with the aid of gravity and is injected from each outflow hole 20 to the side of a body part 23. An injected flow of the working fluid 16 is forcedly altered in its flowing direction in the tangential direction of a fluid return tube 17. With the injection of the working fluid each sprinkler 21 is rotated around an outer periphery of the fluid return tube 17 in a predetermined range. In such a manner, each sprinkler part 21 is securely rotated to inject the working fluid 16 even if the outflow hole 20 and the injection hole 22 are relatively displaced so that the working fluid 16 can be sprinkled uniformly over a wide range in the length and peripheral directions of the evaporation tube 13.

COPYRIGHT: (C)1997,JPO

PROBLEM TO BE SOLVED: To stably bear a leader by arranging automatic constant pressure adjustment bearing devices to the lower end of the leader borne on a three point bearing pile driver main body so as to always provide the leader with constant pushing-up force.

SOLUTION: An endless track 41 is stretched on a frame 42 in the lower part of each of automatic constant pressure adjustment bearing devices 4, it can be followed by movement of a pile driver main body to move, the frame 42 is equipped with an oscillating frame 44 capable of oscillating in the vertical direction within allowable range through a bearing 43, and an air bellows 45 is provided to the inside of the frame 44. Then, pressure A of a pipe line connected to the air bellows 45 is detected by a pressure sensor 58 and is fed back to a controller 51, two way valves 52 and 53 are repeatedly ventilated in accordance with difference between output air pressure A and set pressure given by an input signal, pressure correction is made to the air bellows 45 so as to obtain the output air pressure A proportionate to the input signal, and load of the leader is partially borne stably.

COPYRIGHT: (C)1997,JPO

PROBLEM TO BE SOLVED: To precisely grasp a worker under radiation control and improve the precision of working dose management by receiving the signal corresponding to a work name transmitted from a work number transmitter by a personal dose equivalent measuring instrument, and collecting the data every work name.

SOLUTION: To a work number transmitter 6 installed in the entrance of a working place such as nuclear power station, the work number corresponding to a work executed there is inputted from a number input part 1, and transmitted to a memory part 3. The memory part 3 selects the work name corresponding to the number inputted 1, and displays 5 it. The inputted 1 work number is displayed on a number display part 2, and the transmission instruction of the signal corresponding to the number is also transmitted to a transmitting part 4. When a worker wearing a personal dose equivalent measuring instrument 11 pushes on a switch 10 when he enters the working place, the transmitted 4 number is received 15 by the measuring instrument 11, and the work number is surely stored in the measuring instrument 11 of a person engaged in the work, so that the person engaged in the work can surely grasp the work number, and the management precision of working dose can be improved.

COPYRIGHT: (C)1997,JPO