LEVER-TONGS CATCH TO HOLD SAMPLES IN TENSILE TESTS Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: catch has a body; hinged to it pullings; spring-loaded levers with common axis of rotation and one arm of each lever hinged to corresponding pulling; gripping jaws, each of which is fixed on another arm of corresponding two-arm lever; a setting shaft, fixed on the body in parallel to the shaft of rotation; eccentrics, in which profile grooves are made. Mechanism of eccentrics rotation has a handle, a spring, connecting levers. A movable fork with cylindric tale shaft is located along central axis of the catch. Upper end of the fork is hinged to the spring-loaded levers and its cylindric part has a hole, through which a shaft, that kinematically connects eccentrics, passes. EFFECT: increased accuracy of catch operation. 3 dwg