Abstract: The dissolution testing apparatus has a plurality of stirring elements for stirring the test solutions within a plurality of test vessels with reflective surfaces. The temperatures of the test solutions are individually controlled by a temperature control system. The temperature control system includes a controller, a heating element for each test vessel to heat the corresponding test solution, and a temperature sensor for each test vessel to measure the temperature of the corresponding test solution. The heating elements are wrapped around the outside of the test vessels and held in place by spring-loaded heater jackets. Each stirring element has a hollow shaft, a detachable stirring attachment (e.g., blade or basket), a temperature sensor inside the hollow shaft, and a signal transfer device to transmit signals from the temperature sensor to the controller.

Abstract: A control mechanism for use with a bathtub having a drain opening and an overflow opening, with the drain opening having a stopper moveable between open and closed positions. The control mechanism includes a pipe for coupling the bathtub drain opening to the overflow opening and a T-shaped bracket rotatably supported in the overflow opening having a projection extending outwardly from the opening and having first and second opposing legs extending radially therefrom. A handle is releasably supported on the T-shaped bracket for rotating the bracket. The handle includes a front decorative and an opposing rear surface which includes rearwardly extending tongues having flanges for releasably capturing the first and second opposing legs. A linkage mechanism couples the T-shaped bracket to the stopper to control movement of the stopper.