Abstract: A wheel assembly is provided with a frame adapted to be removably attached to a cooler. The wheel assembly includes a frame adapted to be removably attached to a cooler; a first wheel attached to a first end of the frame and a second wheel attached to a second end of the frame; and at least one protrusion extending from the frame, wherein the protrusion is adapted to be received by a void formed in a cooler such that the wheel assembly is moveable between a first position wherein the frame is attached to the cooler and a second position wherein the frame is unattached to the cooler.

Abstract: A portable detection system (10) for hazardous materials including explosives and infectious or hazardous biological agents readily adapted to conventional mail collection boxes (12), rural mailboxes (100), mailbags (40), and the like. The system includes a fan (14) and a sensor (16). The fan (14) provides sufficient airflow to circulate the air within a mailbox such that the internal air after coming in contact with the contents is directed the sensor for analysis. The air quality can be determined visually (137), audibly (138), or electronically (139). Consequently once such detection is made and the air is verified as being safe, the contents can be removed safely. If it is determined that the air contains some type of hazardous material, further steps can be taken to specifically locate the source of such hazardous material. An alternative embodiment includes a filter (15) to improve fan efficiency.

Abstract: An improved nuclear fission reactor of the continuous fueling type involves determining an asymptotic equilibrium state for the nuclear fission reactor and providing the reactor with a moderator-to-fuel ratio that is optimally moderated for the asymptotic equilibrium state of the nuclear fission reactor; the fuel-to-moderator ratio allowing the nuclear fission reactor to be substantially continuously operated in an optimally moderated state.

Abstract: A cord holder for the storage and transport of electrical cords and similar items comprising a concave pouch open at both ends with a girth wider than the end openings. In use, a bundled or coiled cord is pulled into the device by an arm entering the device through one opening, extending through the device and out the second opening. The bundled cord is grasped by the extended hand and pulled into the device through the second opening. The cord is released after entering the device and expands. It is then held inside by expanding and filling the wider midsection.

Abstract: An automatically scramming nuclear reactor system. One embodiment comprises a core having a coolant inlet end and a coolant outlet end. A cooling system operatively associated with the core provides coolant to the coolant inlet end and removes heated coolant from the coolant outlet end, thus maintaining a pressure differential therebetween during a normal operating condition of the nuclear reactor system. A guide tube is positioned within the core with a first end of the guide tube in fluid communication with the coolant inlet end of the core, and a second end of the guide tube in fluid communication with the coolant outlet end of the core. A control element is positioned within the guide tube and is movable therein between upper and lower positions, and automatically falls under the action of gravity to the lower position when the pressure differential drops below a safe pressure differential.

Abstract: A lifting rack comprises abase including opposite longitudinal rails connected between plural laterally-extending rails to define a support surface having plural rectangular support areas each to support an IBC, in use. A frame is secured to and extends upwardly from the base. The frame includes plural posts secured to the rails proximate outside corners of each of the rectangular support areas. A pair of longitudinal bars and lateral bars are secured to one another at each corner, in a rectangular configuration, and secured to tops of the posts. Lifting lugs or forklift runners are provided for engagement by a transport device for lifting the rack.

Abstract: A method and apparatus are provided to facilitate the management, handling and tracking of interoffice and other mail items by permitting the tagging of each such item and the recording of the mail item in a computer system. Tags on the mail items may be used to track the items through a mail system, the records preferably being updated as the mail item is tracked through the system, and the item records may be queried to determine the status of an item and for other purposes.