Abstract: The present invention provides a lever-type frictional resistance force variable system comprising an arm whose upper end is rotatably supported by an upper beam; a supporting member which is fixed to a lower beam to rotatably support the intermediate portion of the arm; a braking device having frictional resistance plates connected to the lower end side of the arm, frictional pads provided between the frictional resistance plates, a pressing pad, and a screw rod; a turning lever connected to the screw rod; a ball screw threadedly engaging with the turning lever; a servomotor for rotating the ball screw; a displacement sensor for detecting a displacement of a frame; and a control unit for determining a braking force to be generated by the braking device based on the detected value of the displacement sensor and outputting a control signal according to the determined braking force.

Abstract: A sealed container is provided comprising a container body and a container closure. The container body comprises a main barrel-shaped body portion, a closed lower end and an open upper end, together with a generally peripherally extending ridge and an outwardly extending ear. The container closure comprises a generally circular top panel, a downwardly depending peripheral wall terminating in a curled lower end edge, and a generally outwardly extending mounting projection which is adapted to engage a mounting projection extending inwardly from the peripheral wall of the closure. The closure can be easily removed from, and positioned onto, the container body; and the opening and closing operations can be performed safely.