Abstract: Cooling of an enclosed space is effected by a cooling system including a plurality of cooling units forming ducts having an internal surface on which a layer of liquid is developed, e.g. by a wicking material, and through which air from the enclosed space is passed in contact with the liquid layer whereby the liquid is exposed to and evaporates into the air-flow with consequent cooling of the duct wall on which the liquid layer is developed.

Abstract: A system for detecting the presence of firearms and identifying their unique status includes a radiofrequency identification chip supported within each firearm either by the manufacturer or by later retrofit. The RFID chip stores the unique serial number for the firearm, preferably in nonvolatile form. A reader for the chips may be used to transmit an interrogating signal from a distance which causes the chip to send a responsive signal including its serial number. The reader picks up the serial number and provides it to an associated computer. The serial number so obtained may be used with databases to maintain inventories of firearms or determine the history of firearms.

Abstract: Cooling of an enclosed space is effected by means of a cooling system comprising a plurality of cooling units forming ducts having an internal surface on which a layer of liquid is developed, e.g. by means of a wicking material, and through which air from the enclosed space is passed in contact with the liquid layer whereby the liquid is exposed to and evaporates into the air-flow with consequent cooling of the duct wall on which the liquid layer is developed.

Abstract: The present invention is directed to: a non-interlacing expirating yarn bulker comprising a body having an enclosed yarn passage extending therethrough. The yarn passage includes an inlet region, a throat region and an expanding region. A single pressurized fluid channel extends through the body and intersects with the yarn passage in the throat region. Cross sectional areas at certain defined locations in the yarn passage exhibit predetermined relationships. In addition, the inlet region and the pressurized fluid channel both are symmetrical about a common reference plane of symmetry;a replaceable wear member insertable into a body of a jet having a yarn passage with an inlet region and a throat region. The wear member has an upstream face, a downstream face, and a channel extending therebetween. The intersection of the channel and the downstream face of the member defines a wear edge.