Abstract: An Air-Deployable Expendable Ice Buoy (AXIB) that can withstand multiple freeze-thaw cycles and operate equally well in ice prone ocean or fresh water. The AXIB can be dropped from an airborne platform, land on an ice surface, right itself to the vertical position, anchor and stabilize itself in the ice, withstand several freeze-thaw cycles and continue to transmit data while anchored to the ice or floating in the ocean. The unique hull design of the AXIB allows it to withstand multiple freeze-thaw cycles and continue to function. The AXIB is particularly well suited for deployment and utilization in any ice zone where repeated freeze-thaw cycles occur.

Abstract: Sensors suitable for submarine detection are in the form of multilayer polymer beads. The sensors have a change in detectible property, such as color, which occurs when said sensors are exposed to a particular stimulus such as an object or event to be detected. The change in property is thus detectible by an external monitor.

Abstract: A spring wire clip for clipping together sheets has a head and a pair of legs extending forwardly and outwardly from the head. Each leg has a forward transverse portion and a return portion at the end of the transverse portion which lies substantially outside the width of the head. Apparatus for clipping a plurality of sheets with a spreadable spring clip having a head and a pair of legs has an upstanding magazine for the spring clips, a support for the sheets which are to be clipped together and a pusher for engaging the head of the lowermost clip in the magazine and advancing the clip to the sheet support. Cams interposed between the sheet support and the magazine are engaged by the clip as it is advanced for spreading the legs of the clip and then releasing them when they are overlying the sheet support.

Abstract: A spring wire clip for clipping together sheets has a head and a pair of legs extending forwardly and outwardly from the head. Each leg has a forward transverse portion and a return portion at the end of the transverse portion which lies substantially outside the width of the head. Apparatus for clipping a plurality of sheets with a spreadable spring clip having a head and a pair of legs has an upstanding magazine for the spring clips, a support for the sheets which are to be clipped together and a pusher for engaging the head of the lowermost clip in the magazine and advancing the clip to the sheet support. Cams interposed between the sheet support and the magazine are engaged by the clip as it is advanced for spreading the legs of the clip and then releasing them when they are overlying the sheet support.

Abstract: A pencil sharpener has a housing, a single cutter mounted for rotation in the housing, and a fixed pencil guide mounted in the housing and having an opening facing the cutter to expose the end of a pencil to the cutter. A rotatably mounted tube coaxial with the pencil guide extends through the housing and has a gear secured to its outer periphery within the housing. Means simultaneously rotate the cutter and gear. A sleeve mounted on the tube exterior of the housing carries a pair of opposed arms pivotally mounted each of which has a finger to engage a pencil, the tube having a slot to accommodate each finger. A spring interposed between the tube and the sleeve urges the sleeve and the arms in a direction to feed the pencil into the fixed pencil guide.