Abstract: A 3D game machine includes a monitor for displaying images, a game control unit for controlling progress of a game, and an image control unit for generating and displaying a 3D image viewed from a viewing point of a simulated camera on a screen of the monitor. A transverse position and a height position of the head of a game player located in a play area before the screen of the monitor are detected using one ultrasonic transmitter and two ultrasonic receivers, and the viewing point of the simulated camera is so moved as to follow a displacing direction and a displacing amount of the detected position of the game player's head, thereby allowing the viewing point of the simulated camera to follow free movements of the game player so that images viewed from the viewing point intended by the game player are actively displayed.

Abstract: A rotary device for a game machine, comprises a rotatable member rotatable by a game player, a rotatable shaft having the rotatable member mounted thereon, a bias unit for biasing the rotatable shaft to its neutral position thereof, and a braking unit having a contacting member and a contacted member which are opposed to each other and adapted to give a rotational resistance to the rotatable shaft based on a contact resistance created by a variation of a distance between the contacting member and the contacted member.

Abstract: There is provided a light-emitting display device which is resistive to shock and vibration and a display switching method comprising: a forward transparent plate 322a having a light scattering portion for a predetermined design pattern relative to a surface direction thereof, a backward transparent plate 322b having a light scattering portion for a predetermined design pattern relative to a surface direction in which the second-mentioned design pattern is different from the first-mentioned design pattern of the light scattering portion of the forward transparent plate, a light source 324 for the forward transparent plate for supplying incidence of light into the forward transparent plate from an end surface of the forward transparent plate, and an other light source 325 for the backward transparent plate for supplying incidence of light into the backward transparent plate from an end surface of the backward transparent plate, so that switching is made from and to emitting and quenching of the backward transp

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.

Abstract: A 3D game machine is provided with a monitor 11 provided at a specified height position of a casing 10 for displaying images, a game control unit 100 for controlling the progress of a game, and an image control unit 110 for generating a 3D image viewed from a viewing point of a simulated camera and displacing it as a game image on a screen of the monitor 11. A transverse position and a height position of the head of a game player located in a play area before the screen of the monitor 11 are detected using one ultrasonic transmitter 31 and two ultrasonic receivers 32, 33, and the viewing point of the simulated camera is so moved as to follow a displacing direction and a displacing amount of the detected position of the game player's head. Accordingly, the viewing point of the simulated camera can follow free movements of the game player. Therefore, images viewed from the viewing point intended by the game player can be actively displayed.

Abstract: A rotary device for a game machine, comprises a rotatable member rotatable by a game player, a rotatable shaft having the rotatable member mounted thereon, a bias unit for biasing the rotatable shaft to its neutral position thereof, and a braking unit having a contacting member and a contacted member which are opposed to each other and adapted to give a rotational resistance to the rotatable shaft based on a contact resistance created by a variation of a distance between the contacting member and the contacted member.

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.

Abstract: In a table tennis ball-sorting device, a plurality of rails are disposed side by side in substantially a horizontal direction along the side of at least one playing surface of a table tennis table at intervals that are capable of having passed therethrough only deformed balls, and a plurality of rails are disposed side by side in substantially a horizontal direction along the rear part of the playing surface at intervals that are capable of having passed therethrough only deformed balls. The former rails are disposed to be inclined towards downstream, while the downstream side thereof is overlapped on the upstream part of the latter rails so that balls can be transferred. A table tennis apparatus using the table tennis ball-sorting device is also disclosed.

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.

Abstract: A front frame and a rear frame of an alternator house a rotor and a stator therein and are secured by through bolts and nuts to each other in an axial direction at supports which are formed on the circumferential portion of the frames. Cooling air intake windows are formed on the end surfaces of the frames and cooling air discharging windows are formed on the circumferential surfaces of the frames. Window ribs formed between the discharging windows are arranged so that the ribs adjacent to the supporting portions have a width which is greater than the width of other ribs, thereby providing sufficient rigidity to suppress resonant vibrations and the generation of magnetic noise which occurs when the armature reaction of the alternator is transmitted from the stator to the entirety of the frames.

Abstract: The connection structure of alternator mount stays with a drive frame and a rear frame is strengthened so that increased vibration of the alternator's rotor and a stator is prevented and, accordingly, generation of magnetic noise is suppressed. The alternator is provided with generally triangular engine-mounting stays which are secured to an engine. A plurality of stay-reinforcement ribs are integrally formed with sides of the engine-mounting stays of the alternator and with the bottom of outer peripheries of the alternator, thereby increasing the rigidity of the stays. Consequently, vibrations from the engine are not amplified by the engine-mounting stays or transmitted to the drive frame or to the rear frame, thereby suppressing an increase in vibration of the rotor and the stator. Deformation of the drive frame and the rear frame due to the vibration transmitted from the engine is also prevented.

Abstract: A vehicle alternating current generator increasing the flow of cooling air therethrough and reduces whizzing sounds from cooling windows surrounding the generator's fan. This is done by inclining guide walls separating the cooling windows so that the angle of inclination thereof in the radial direction of the generator is larger the closer the windows are to the forward edge of the housing supports and smaller the closer the windows are to the backward edge of the housing supports. Also, the cooling windows narrow the closer they are to the supports, and are widest in the middle between two adjacent supports. Further, the axial length of the windows may be shorter the closer they are to the supports, and longer in the middle between two adjacent supports.

Abstract: An explosion-proof type rotating electrical machine having excellent cooling and brush powder discharge capabilities. A drive shaft of a rotor is provided with slip rings for supplying current to a field coil, which is energized through brushes capable of activating the field coil by contacting with the slip rings. The brush compartment incorporated with the brushes and slip rings and the outside of the rotating electrical machine are connected with each other through an air suction path, the brush compartment and an inside space of the rotating electrical machine are connected with each other through an air blowing path, in which a flame stifling wire net is provided.

Abstract: A high-speed steel obtained by powder metallurgy processing wherein a chemical composition includes, by weight %,C: a quantity (%) which satisfies with the following formula ##EQU1## where Ceq=0.19+0.017 (W+2Mo)+0.22 VN, W, Mo and V are respectively the content (%) in steel______________________________________ Cr: 3-5% V: 6.0-8.5% Mo: 4-7.5% Co: 5-15% W: 5-7% N: 0.2-1.7% ______________________________________and the remainder is Fe, and (W+2Mo) is 15-20% is disclosed.

Abstract: A high-speed steel obtained by powder metallurgy processing having a chemical composition which includes, in weight %,C: a quantity (%) which satisfies the formulaCeq+0.15.ltoreq.C+12/14 N.ltoreq.Ceq+0.35where Ceq=0.19+0.017 (W+2Mo)+0.22V, andN, W, Mo and V are respectively the content (%) in steel______________________________________ Cr: 3-5% V: 4.0-6.0% Mo: 8-12% Co: 5-15% W: 8-14% N: 0.2-1.2% ______________________________________and the remainder is Fe, and (W+2Mo) is 27-32%, is disclosed.