Abstract: An energy-dissipating receptacle for use with a fluid jet cutting system is disclosed wherein the interior cavity of the receptacle has generally converging sidewalls in the direction of jet flow. A plurality of circulating suspensoids within the cavity are impinged upon by the jet to dissipate the jet's kinetic energy. Means are included for permitting the egress of spent jet fluid while retaining the suspensoids.

Abstract: An energy-dissipating receptacle is disclosed for use with fluid jet cutting systems. The receptacle includes a volume of suspensoids which circulate within the cavity to at least substantially dissipate the kinetic energy of the fluid jet, together with means for automatically maintaining an effective volume of suspensoids in the cavity as the suspensoid volume is decreased by the wearing action of the fluid jet impingement.The effective volume of suspensoids are preferably maintained by means of a filler tube having a discharge end positioned within the receptacle to effectively regulate the suspensoid volume.By including means for maintaining an effective volume of suspensoids during the cutting process, the receptacle may be fabricated with compact dimensions for enhanced maneuverability when coupled to a fluid jet nozzle for coordinated movement therewith.

Abstract: A flow limit valve for limiting the flow rate of a pressurized fluid includes a valve body with an interconnecting cavity of circular cross section. Within the cavity if a piston that slides within the cavity under force generated by a pressure differential across the piston to a closed position which prevents fluid flow through the valve. A pin is provided that is attached to the piston and that protrudes through the piston seat into the outlet side of the cavity when the piston is at the closed position. Opposite the pin is an encapsulated magnet within the valve body that can be moved in response to another magnet outside the valve body to contact the pin attached to the piston to move it to the open position. The magnetic forces applied through the valve body affect internal valve operation via the pin attached to the piston and this avoids the danger of noxious fluids escaping through sliding seals or flexible membranes.

Abstract: A method and apparatus for cutting holes of circular or other shape by first cutting at the center of the proposed hole, then cutting to the circumference and following the shape desired. A tool that accomplishes these functions is described which includes a pivoted link attached to a ring at one end and the cutting tool at the other end, when torque is applied to the link the tool follows the desired cutting sequence.

Abstract: A novel, low-friction, low-inertia flexible diaphragm containing a magnet formed as an integral part of the diaphragm is mounted in a chamber (preferably cylindrical). The chamber comprises part of the flow meter in a flow control system. One or more sensing devices are mounted on the walls of the chamber to sense the instantaneous position of the diaphragm. A novel electronic control circuit processes the data from the one or more sensing devices to provide measures of the flow rate during the displacement of the diaphragm along the cylinder. Signals are generated by the electronic control circuitry for switching a pair of three-way valves (one valve comprising the input valve and the other valve comprising the output valve) such that during one-half of a cycle the intput valve transfers fluid into the cylinder on one side of the diaphragm and, during the other half of the cycle, transfers fluid into the cylinder on the other side of the diaphragm.

Abstract: An improved flow-controlling mechanism utilizes interference-fitting components and static seals to assure accurate and repeatable fluid flow-controlling settings and to eliminate a leakage deteriorating seals.