Abstract: A rotatable container assembly for use in surface treatment of particulate workpieces includes a container having opposed head ends and a side member defining a work cavity therein. An aperture is formed in a minor portion of the side member and a door arranged for opening and closing relation with the aperture. Means for imparting generally arcuate movement and generally radial movement advances and retracts the door between open and closed positions. Preferably, the movement imparting means includes a cam slot and cam follower arranged between a driven gear and a closely adjacent end plate. Push blocks assist in selective rotation of the container both relative to and with the door. Plural locking slots are arranged on the periphery of the end plate for operative engagement with a lock member extending from the gear.

Abstract: A rotatable container assembly for use in surface treatment of particulate workpieces includes a container having opposed head ends and a side member defining a work cavity therein. An aperture is formed in a minor portion of the side member and a door arranged for opening and closing relation with the aperture. Means for imparting generally arcuate movement and generally radial movement advances and retracts the door between open and closed positions. Preferably, the movement imparting means includes a cam slot and cam follower arranged between a driven gear and a closely adjacent end plate. Push blocks assist in selective rotation of the container both relative to and with the door. Plural locking slots are arranged on the periphery of the end plate for operative engagement with a lock member extending from the gear.

Abstract: A control device for a corrosion testing apparatus includes an airtight air saturation tower which is adapted to contain a liquid. A heater is provided in the tower to heat the liquid. A sensor is provided adjacent a wall of the tower, to sense an abnormal condition in the tower. The sensor can be adapted to measure the presence of liquid in the tower adjacent the sensor or the temperature of a wall of the tower. A control device is provided for shutting off the heater when the sensor detects an abnormal condition in the tower.