Abstract: A welded metal container for a sheath 1 or 1A of gas insulated switch gear comprises a trunk pipe 2, 21 and a branch pipes 3, 31, 32 welded to the trunk pipe 2,21 by arc welding A or laser beam welding LB and flanges welded to the each end portion of the trunk pipe 2, 21 and branch pipes 3, 31, 32 by the laser beam welding. After the arc welding A, the ends of trunk pipe 1, 21 and branch pipes 3, 31, 32 are machined precisely and flanges 4a, 4b, 4c, 4d, 4f and 4g are welded to the end portions of the trunk pipe 2, 21 and branch pipes 3, 31, 32.

Abstract: A method for manufacturing a welded metal container by first arc welding a branch pipe to a trunk pipe. The arc welding of the pipes together causes both of the pipes to be thermally deformed. The end surfaces of the pipes are then cut by a laser cutting or mechanical cutting process so that the ends of the trunk pipe are in parallel and perpendicular to the end of the branch pipe. Subsequently flanges are laser welded to the ends of the pipes without further thermally deforming the pipes. The metal container made by this process can be used as a sheath for a gas insulated switch gear.

Abstract: In a flash photographing device which comprises a camera body and a flash gun adapted to be connected to the camera body during photography, there is provided a rod member for supporting the flash gun, a supporting member secured to the camera body, and holder means provided on the supporting member for rotation with the rod member. The holder means is displaceable between a restraining position for holding the rod member against sliding and rotating movement and a half-restraining position for holding the rod member for at least sliding movement upon application of an extraneous force on the rod member. The device further includes adjusting means provided on the supporting member for displacing the holder means between the restraining position and the half-restraining position, and positioning means provided to restrain the holder means from rotating at a plurality of locations when the holder means has been displaced in the direction of rotation.