Abstract: A method and apparatus for the immobilization of live hard shell aquatic crustaceans "hard shell crabs" prior to or during processing. The apparatus includes a nonconductive container containing an electrolyte solution, the quantity of said electrolyte solution being sufficient to submerge a number of live hard shell crabs to be processed; electrodes are positioned in spaced relationship within the container and are at least substantially covered by the electrolyte solution, each of said electrodes including a pair of parallel metal rods projecting vertically from the bottom of the container; and an electric switch contained in a connector box, the switch being electrically connected intermediate the electrodes and an electrical power source for allowing an operator to activate the apparatus. Electrical energy supplied to the electrodes is transferred via the electrolyte solution to the submerged crabs for their immobilization.

Abstract: A suspension or rig for simultaneously setting a plurality of roof trusses on a building framing. A plurality of spaced vertical cables are suspended from a pair of horizontally extending pipes and connected to a central portion of each top sloping side of each truss, making two suspensions for each truss. A pair of horizontally extending spaced parallel pipes have ends connected to the pair of pipes. Suspending apparatus lifted by a crane comprises four linkage elements connected to end portions of the last mentioned pair of horizontally extending spaced parallel pipes. The improvement comprises securely fastening each truss at a predetermined distance from its apex to assure a perfectly horizontal and co-planer base for all the trusses, also the addition of eyes near the base portion of the trusses, through which eyes a cable or rope is passed together with flexible cable or rope portions for holding the trusses securely together equi-distantly and in spaced parallel relationship.

Abstract: A suspension or rig for simultaneously setting a plurality of roof trusses on a building framing. A plurality of spaced vertical chains are suspended from a pair of horizontally extending pipes and connected to a central portion of each top sloping side of each truss, making two suspensions for each truss. A pair of horizontally extending spaced parallel pipes have ends connected to the pair of pipes. Suspending apparatus lifted by a crane comprises four linkage elements connected to end portions of the last mentioned pair of horizontally extending spaced parallel pipes. The pipes or beams may take other forms such as angle cross sections.