Abstract: A combination light pen, which includes an upper barrel, a pen cap and a connector fastened to top and bottom ends of the upper barrel, a LED and battery circuit assembly mounted in the upper barrel, a push-button switch mounted in the pen cap and operated to turn on/off the LED, a transparent lower barrel fastened to the connector to hold an ink cartridge and a transparent conical socket, wherein the lower barrel comprises a water chamber disposed around the ink cartridge, a liquid filled in the water chamber, and display items floating in the liquid inside the water chamber.

Abstract: A process for preparing alkane sulfonic acids and sulfonyl chlorides by oxidation of alkanethiols or dialkyl disulfides in the presence of nitric acid or nitric oxides as a catalyst and in the presence of bromide as a cocatalyst.

Abstract: A propulsive device includes an enclosed type housing for receiving a motor and a spindle. The housing has no openings for preventing water from entering into the housing. One or more magnets are secured to the spindle and rotated in concert with the spindle. A casing is secured to the housing for rotatably receiving a shaft. The shaft has a blade secured to one end and has one or more magnets secured to the other end for acting with the magnets secured to the spindle and for allowing the blade to be rotated by the motor via the magnets.

Abstract: A controller for contracting the collapsible rods of a baggage carrier wherein a spring-biased sliding element carried by the controller body is pushed downwardly to cause retraction of stop members provided on the rods, thereby permitting the rods to be quickly collapsed into each other when a handle mounted at the top of the rods is also pushed downwardly.