Abstract: A security door closure system for cruise ships and other similar public entrance points to prevent terrorist attack or ship take-over is needed. Cruise ship passenger and ship provisioning entrance gangplanks pass through large hydraulically operated shell doors. The gangplank must be removed to close the shell door. The quick close security door system (Door-Gate) is a portable bullet resistant rapid close door system that is placed in conjunction with the gangplank or other entry system, which when closed prevents forced entry. A single lever either remotely or manually operated immediately closes the doors, which then cannot be forced opened from the entrance side.

Abstract: A security door closure system for cruise ships and other similar public entrance points to prevent terrorist attack or ship take-over is needed. Cruise ship passenger and ship provisioning entrance gangplanks pass through large hydraulically operated shell doors. The gangplank must be removed to close the shell door. The quick close security door system (Door-Gate) is a portable bullet resistant rapid close door system that is placed in conjunction with the gangplank or other entry system, which when closed prevents forced entry. A single lever either remotely or manually operated immediately closes the doors, which then cannot be forced opened from the entrance side.

Abstract: A security door closure system for cruise ships and other similar public entrance points to prevent terrorist attack or ship take-over is needed. Cruise ship passenger and ship provisioning entrance gangplanks pass through large hydraulically operated shell doors. The gangplank must be removed to close the shell door. The quick close security door system (Door-Gate) is a portable bullet resistant rapid close door system that is placed in conjunction with the gangplank or other entry system, which when closed prevents forced entry. A single lever either remotely or manually operated immediately closes the doors, which then cannot be forced opened from the entrance side.

Abstract: A security door closure system for cruise ships and other similar public entrance points to prevent terrorist attack or ship take-over is needed. Cruise ship passenger and ship provisioning entrance gangplanks pass through large hydraulically operated shell doors. The gangplank must be removed to close the shell door. The quick close security door system (Door-Gate) is a portable bullet resistant rapid close door system that is placed in conjunction with the gangplank or other entry system, which when closed prevents forced entry. A single lever either remotely or manually operated immediately closes the doors, which then cannot be forced opened from the entrance side.

Abstract: A security door closure system for Cruise ships and other similar public entrance points to prevent terrorist attack or ship take-over is needed. Cruise ship passenger and ship provisioning entrance gangplanks pass thru large hydraulically operated shell doors. The gangplank must be removed to close the shell door. The quick close security door system (Door-Gate) is a portable bullet resistant rapid close door system that is placed in conjunction with the gangplank or other entry system which when closed prevents forced entry. A single lever either remotely or manual operated immediately closes the doors which then cannot be forced opened from the entrance side.

Abstract: A mobile rocking seating device with wheels attached to upper and lower frames connected together by leaf springs which maintain the seat in a generally horizontal position with adjustable seat back angle allowing the user to rock themselves as in a conventional rocking chair or propel themselves with their feet when leaning forward or be pushed by others.

Abstract: A dipping sonar transducer housing includes a generally cylindrical housing (10) which is suspended at the end of a cable (12) connected to tile housing through a vibration isolation module (14) which includes springs (22) to damp out noise, particularly that from the supporting vehicle. The housing (10) contains an upper water-tight chamber (26) which contains circuit boards (28) and preamplifiers (30) which serve as amplification and multiplexing means for the hydrophones carried on extendible arms (96, 60, 88); a second water-tight chamber (35) immediately below the first chamber (26) contains an electric motor (36) which drives a hydraulic pump (38) which provides fluid under pressure to an accumulator (40). Movable vertically on the outside of the second chamber (35) is a piston (48) which drives a plurality of links (54, 56) which extend the receiver array.

Abstract: A apparatus for economically producing both large and small objects wherein a continuous extrusion of viscous liquid is to be dispensed from a nozzle mounted directly adjacent to an object support platform. Preprogrammed movement is achieved between the nozzle and the object support platform in accordance with the size and shape of the object that is to be fabricated. A viscous liquid is to be dispensed a layer at a time resulting in building of the object layer-by-layer from the bottom of the object to the top of the object. Fibers may be added to the viscous liquid when fabricating large objects, thus providing structural reinforcements. The viscous liquid is to be rapidly curable upon the application of light energy with this light energy supplied at a three hundred sixty degree pattern about the nozzle. A light shield immediately adjacent to the nozzle prevents premature curing of viscous liquid. The high viscosity of the liquid retains the controlled shape prior to curing.

Abstract: An expandable sonar array structure includes a central body with a plurality of radially extendable hydrophone support arm assemblies attached to said body and including a motor-driven drive member to which all the arm assemblies are attached through pushrods. Each arm assembly includes three substantially vertically aligned, radially extending arms carrying hydrophones with top and bottom arms attached to the pushrods through short arms with pivots chosen so that the arms move in opposite directions. The center arm is attached to the lower arm by means of a link which closes a parallelogram arrangement such that the center arm moves essentially in parallel with the lower arm. An additional arm is pivotally attached to the outboard end of the center arm and extends the center arm to essentially the diameter of the upper and lower arms, and its outboard end is attached through a link to the outside end of the upper arm.

Abstract: A wheelchair that is to be movable between an upper normal sitting position and a lower reclining position. When in the lower position, the seat frame of the wheelchair is located substantially two-thirds nearer the supportive surface when compared to the upper position.

Abstract: A drum and piston drive system incorporates within the interior of a drum used for reeling cable in and out, a reversible electric motor which drives the drum from the inside through a gearset. Also carried within the drum is a manifold structure including a gear pump driven directly from the opposite end of the reversible motor operating in a closed hydraulic circuit to supply hydraulic pressure to reversibly move a piston in a cylinder. The manifold includes check valves limiting the pump output pressure, and a pair of accumulators which maintain a desired pressure on both sides of the pump to avoid cavitation. Relief valves in the manifold limit the pressure to the piston and check valves in each line to the cylinder block reverse flow. The system operates to control and coordinate drum rotation movement and direction with the direction and movement of the piston.

Abstract: A system for deploying an array of sonar projector transducers includes a housing in which a plurality of disk shaped projectors are stacked, a pair of small diameter cables are reeled from a powered drum for tethering the projectors, the cables being anchored to the bottom projector, a pair of electrical conductors are connected to the projectors, each conductor constituting a series of sections interconnecting electrical connectors fastened to opposite sides of each projector, a centering ring attached to the bottom projector including a series of pressure responsive latches which serve to secure the array in the housing and to release the array upon its reaching a desired depth. Where the drum is actuated the stack is lowered with each projector being successively suspended by its pair of conductor sections, and each of the conductor sections is given a predetermined twist such that when the array is again returned to the housing the conductor sections are caused to form predetermined loops.

Abstract: A connector for a small diameter towed sonar array is used to couple similar sections together. Each section includes a sheath or tubing of flexible plastic material such as polyvinylchloride clamped at each end tightly around a cylindrical metal coupling member having threads extending external of said tubing. Held adjacent the internal surfaces of the coupling members at the outside ends thereof are a pair of connector members which include a plurality of concentric conductor tracks. When adjacent sections are joined, these conductor tracks are pressed tightly together, partly as a result of the force exerted by flexible plastic spacers which abut against internal shoulders of the coupling members and the connector, urging the connector members outwardly against each other.