Abstract: The improved sample holder comprises a cylinder portion 5 having a center hole through which a test piece is inserted, a reciprocating ram rod 7 that is inserted into said hole and which is vertically slidable under hydraulic pressure to push down the test piece, and a test piece fixing plate 6 that is inserted under the cylinder portion 5 as it is slid horizontally from either right or left, with the thicker part of the test piece being held between the fixing plate 6 and the working end of the hydraulically operated pushing rod 7. The holder permits a fatigue test piece to be mounted and fixed on a testing machine by remote manipulation so that a fatigue test can be performed in either a hot vacuum or inert gas atmosphere.

Abstract: The present invention provides a sealing structure for a testing vessel, comprising a lid member secured to a base and having an upwardly projecting insertion portion and a supporting portion; a cylindrical container detachably mountable on the lid member in an up-and-down direction, the container having a lower open end portion to which said projection can be mated and which can be supported by the supporting portion and on which a plurality of first radially outwardly extending locking portions and first notches are alternately formed along a circumference thereof; a clutch member which is attached to the base and rotatingly guided in an circumferential direction by a guide member and on which a plurality of second radially inwardly extending locking portions and second notches are alternately formed within the same angular range as that of the first locking portions and first notches; and an elevator means for lowering and lifting the container to mount and dismount the latter with respect to the lid membe