Abstract: A low density concrete building panel and method of manufacturing is provided with one or more carbon fiber or steel reinforcements which may include window and door openings which can be easily transported and erected at a building site.

Abstract: An insulative, lightweight concrete building panel is provided with one or more fiber or steel reinforcements which are manufactured in a controlled environment and can be easily transported and erected at a building site.

Abstract: A locking device 100 is inserted within the disk drive (11) of a personal computer ("PC") 12 to prevent unauthorized use thereof. The locking device (100) includes a pair of pivoted plates (101, 102) retained in their expanded locking position within the disk drive (11) by means of an externally-accessible padlock (107) or its equivalent. Each of the plates (101, 102) carries a spring finger (109) which "bites" into the adjacent respective side rail (26) in the event that an attempt is made to remove the locking device (100). The locking device (100) is inserted into the disk drive (11) in a one-handed operation and in its locked position. In another embodiment, a key-operated lock is carried on one of the pivoted plates.

Abstract: Two foamable chemicals are diverted from a recirculation path by simultaneously operable pivoting ball valves to respective separate paths through respective one way valves, pressure responsive normally closed poppet valves, and a common conduit to a common mixing chamber wherein they are mixed by identical counter rotating shafts having roll pins extending through diametric bores, before the thus mixed chemicals are discharged into a suitable mold. Solvent and air are supplied under the control of selectively operable valves through pressure responsive poppet valves to the same common conduit as the chemicals for washing the chemicals from the conduit, from the outer face of the chemical poppet valves, and for further washing the mixing chamber.

Abstract: Two foamable chemicals are diverted from a recirculation path by simultaneously operable pivoting ball valves to respective separate paths through respective one way valves, pressure responsive normally closed poppet valves, and a common conduit to a common mixing chamber wherein they are mixed by identical counter rotating shafts having roll pins extending through diametric bores, before the thus mixed chemicals are discharged into a suitable mold. Solvent and air are supplied underthe control of selectively operable valves through pressure responsive poppet valves to the same common conduit as the chemicals for washing the chemicals from the conduit, from the outer face of the chemical poppet valves, and for further washing the mixing chamber.