Abstract: A multiple station disinfector apparatus simultaneously heats a plurality of devices such as contact lenses. Each of these devices is disposed in a quantity of liquid within a closed container. The apparatus comprises a housing having a base portion and a recloseable cover portion and a plurality of similar recessed receptacles in the base for receiving the containers. Each receptacle has a bottom wall and sidewall of complementary shape for surroundingly engaging a bottom wall part and a substantial portion of a sidewall part of one of the containers. Heating elements are disposed for heating the receptacles.

Abstract: A logic circuit tester wherein high and low threshold signal states and transitions through them are detected. The presence or absence of any of these four states is used to provide combinations of logic signals to an L.E.D. dot matrix display unit encoded to respond with a series of 11 patterns, each of which is illustrative of a circuit state likely to be encountered.

Abstract: An portable electronic device that generates sound of handclapping. A small, easily-carried and easily-used device that eliminates fatigue from physical clapping and makes the user appear more sophisticated.