Abstract: A tolerance ring is formed of a plate member, in a ring shape that is substantially circular along a predetermined direction, and provided with a plurality of protrusions projected radially in a circumferential direction, wherein an even number of the protrusions are arranged along the circumferential direction, and a plurality of straight lines that pass through a central portion of the plurality of protrusions and a center of a circle that circumscribes the tolerance ring cross one another.

Abstract: A clamp for a disk rotation driver stably and surely supports a disk in the disk rotation driver. The clamp 7 for a disk rotation driver 1 having a central portion and a periphery being circumferentially provided with a contact portion 13, the central portion fastened to a hub 5 to be rotated, and the contact portion 13 pressed against a recordable disk 3 attached to the hub 5 to apply a pressing force Fv to the disk 3 in a rotation axis direction and fixedly support the magnetic disk 3 on the hub 5, the clamp 7 comprising: a wall portion 25 extending from the periphery and being oriented in the rotation axis direction to form the contact portion 13 so that a frictional force ?Fy produced between the contact portion 13 and the magnetic disk 3 and resisting a locomotion Fx that acts on the contact portion 13 and radially outwardly biases the contact portion 13 when the contact portion 13 is in contact with the magnetic disk 3 is equal to or larger than the locomotion Fx.

Abstract: A disc can be supported stably and surely.

Abstract: The present invention provides a second lock mechanism (5) which interlocks a seat (1) with a rotating member (45) and renders the rotating member (45) non-rotatable with respect to the seat (1), and when the seat (1) is reclined the first lock mechanism (5) and the vehicle floor (2) are interlocked and rotation of the rotating member (45) with respect to the seat (1) is regulated, while when in a folded-up state, rotation of the seat (1) with respect to the vehicle floor (2) by an axle mechanism (44) is regulated by rotation control of the rotating member (45) with respect to the seat (1) by means of the interlocking of the second lock mechanism (5) and the seat (1), via a linkage mechanism (49), thus achieving a significant improvement in the usability of an automobile seat when adjusting it to a seating position or a folded-up position.

Abstract: A disaster prevention apparatus is adapted to intercept and disperse gas leaking from a disaster ship offshore. The apparatus includes a marine mover and a water curtain forming device for forming a water curtain on the lee of the disaster ship. Pressurized water is supplied to the water curtain forming device by a water pump. The water thusly supplied is ejected from the water curtain forming device in a direction substantially perpendicular to the water surface, thereby creating a water curtain on the water.

Abstract: A method of controlling the position of an on-water water curtain device for building a water curtain on the water in order to stop or disperse dangerous gas leaking from a ship or to block flame and radiant heat due to the leaking gas. The method comprises the steps of detecting positions of the ship and the water curtain device, detecting wind direction and tidal current, and adjusting the position of the water curtain device to an optimal position in accordance with detected values so as to maintain the diaster prevention water curtain substantially perpendicular to the leaking gas.

Abstract: A screen forming apparatus and method comprises a long pipe of predetermined length floatable in the water, a pump for conveying the water through the pipe, a pipe connecting the pipe with the pump, an air-water device provided with the pipe for mixing the water with air, a number of nozzles disposed along the longitudinal direction of the pipe at predetermined intervals for injecting the water in the form of screen, and a device for producing air curtains flowing along the front and the rear surfaces of the screen in order to maintain the screen substantially uniform in thickness.

Abstract: A screen forming apparatus and method comprises a long pipe of predetermined length floatable in the water, a pump for conveying the water through the pipe, a pipe connecting the pipe with the pump, an air-water device provided with the pipe for mixing the water with air, a number of nozzles disposed along the longitudinal direction of the pipe at predetermined intervals for injecting the water in the form of screen, and a device for producing air curtains flowing along the front and the rear surfaces of the screen in order to maintain the screen substantially uniform in thickness.

Abstract: A device for locking a platform of an offshore structure wherein each of legs vertically rest on the sea floor and is provided with a rack. The platform in adapted to move upward or downward along the legs and is provided with chocks which engage with the racks, respectively, of the legs. The teeth of the chock has a whole depth deeper than that of the teeth of the rack so that when the chock engages with the rack, the deddendums of the chock is caused to deflect themselves respectively about the deddendums, which are made into engagement with the rack, so as to follow the displacement of the platform in the direction of gravity.