Abstract: Apparatus for producing alkali hydroxide and method for operating apparatus for producing alkali hydroxide are provided. A cooling chamber through which a coolant can pass is constructed by placing a separation wall in a cathode chamber on a side opposite to an ion-exchange membrane, and a flow rate adjuster, such as manual valves, which can adjust the supply flow rate of the coolant is placed in each unit cell. The electrolytic temperature of each unit cell is regulated at an optimum operating temperature depending on the current density by adjusting the flow rate of the coolant without individually adjusting the flow rate of salt water supplied to the unit cell or the concentration of the salt water.

Abstract: In a tripod type constant velocity universal joint having a roller (28) carried by each of three trunnions (25) of an inner joint member (24) and accommodated in one of three guide grooves (22) of an outer joint member (21) so that the roller (28) rolls along track surfaces (23) of the corresponding guide groove on its convex outer periphery, cooperating surface portions (31a and 31b) and/or (32a and 32b) being provided, which come in contact with each other when the roller (28) is about to tilt in a plane perpendicular to the axis of the outer joint member.

Abstract: This slidable constant velocity universal joint comprises an outer joint member 1, and a tripod member 4 having a plurality of axially extending leg shafts 5 and outer rings 3 which are rotatably fitted on the leg shafts 5 and whose outer peripheries 3b are spherical. The tripod member 4 is received inside the outer joint member 1, and the outer rings 3 of the tripod member 4 are fitted in track grooves 2 in the outer joint member 1 so that they are slidable axially of the outer joint member. A sliding contact region S where relative sliding between the outer ring 3 and the leg shaft 5 in the leg shaft direction occurs is defined between the outer ring 3 and the leg shaft 5, and the outer ring 3 is allowed to swing around the axis of the leg shaft 5. The center of curvature O of the outer periphery of the outer ring 3 coincides with the sliding contact region S, thereby preventing the outer ring 3 from exhibiting unstable behavior before and after specific phases (0°, 180°).

Abstract: A tripod member having three trunnions is inserted in an outer ring. A guide block is supported on each of the trunnions so as to be pivotable around the trunnion and is formed with a ball circulation groove at each side thereof. A plurality of balls are accommodated in the ball circulation groove so that part of the balls will protrude diametrically outwards from the ball circulation groove. The outer ring is formed in its inner surface with raceway grooves for guiding the balls in an axial direction. An arcuate ball rolling surface and a ball guide surface are formed at both sides of each raceway groove to guide the balls and prevent them from dropping out, respectively.