Abstract: A pipe fitting has housing portions attached in spaced relation to define non-coaxial receptacles that receive pipe elements. The housing portions are supported on split rings received within grooves in each housing portion. The housing portions are supported in spaced relation in a preassembled state to permit insertion of pipe elements into the receptacles without disassembly of the fitting. The grooves in the housing portions have a floor surface with three surface portions. Two of the surface portions on each groove of each housing portion engage the split rings when the housing portions are supported in spaced relation.

Abstract: A high voltage inductive adder is disclosed. In some embodiments, the high voltage inductive adder comprising a first adder circuit and a second adder circuit. The first adder circuit including a first source; a first switch electrically coupled with the first source; a first transformer core; and a first plurality of primary windings wound about the first transformer core and electrically coupled with the first switch. The second adder circuit including a second source; a second switch electrically coupled with the second source; a second transformer core; and a second plurality of primary windings wound about the second transformer core and electrically coupled with the second switch. The high voltage inductive adder comprising one or more secondary windings wound around both the first transformer core and the second transformer core and an output coupled with the plurality of secondary windings.

Abstract: A delay circuitry is configured to hold up power to a mass storage device after a power fault disables communication of the mass storage device with the host computer. The time delay is sufficient to allow saving of in-flight data from the storage device's volatile cache to the non-volatile media (of the storage device) and to update a metadata table in the non-volatile media.

Abstract: A pipe coupling has segments attached end to end to define a central space that receives pipe elements inserted between the segments. The segments are supported on split rings received within grooves in each segment. The segments are supported in spaced relation in a preassembled state to permit insertion without disassembly of the coupling. The grooves in the segments have a floor surface with three surface portions. Two of the surface portions on each groove of each segment engage the split rings when the segments are supported in spaced relation.

Abstract: Seals for mechanical couplings and fittings have sealing surfaces with one or more projections that form closable leak paths between the coupling or fitting and pipe elements being joined. The leak paths close when the coupling or fitting is properly installed. Otherwise, the leak paths remain open to ensure that improperly installed couplings and fittings can be discovered during pressure testing and before service pressure is applied.

Abstract: A combination fire suppression sprinkler and coupling is provided in a pre-assembled state for rapid installation into a piping network. Coupling segments are pivotably hinged and an adjustable attachment assembly opposite the hinge secures the segments to one another. In the pre-assembled state the segments are held at a separation angle sufficient to permit insertion of a pipe element into the coupling without disassembling the coupling.

Abstract: Fittings, including elbow fittings and Tee fittings have bodies that surround a central space and define openings to receive pipe elements. Ribs surround the openings, and gaps are positioned between the ribs to permit deformation of the body when ends of the body in facing relation are brought together. The body may be formed of two housings or unitary in construction. The ribs may be grooved to accommodate toothed retainer rings providing mechanical engagement with pipe elements. The ribs have surfaces with radii of curvature that, when the ribs are undeformed, are substantially equal to the radii of curvature of the pipe elements they engage.

Abstract: A mechanical coupling for joining pipe elements has a seal. The seal has sealing surfaces with one or more projections that form closable leak paths between the coupling and pipe elements being joined. The leak paths close when the coupling is properly installed. Otherwise, the leak paths remain open to ensure that improperly installed couplings can be discovered during pressure testing and before service pressure is applied.

Abstract: A high voltage inductive adder is disclosed. In some embodiments, the high voltage inductive adder comprising a first adder circuit and a second adder circuit. The first adder circuit including a first source; a first switch electrically coupled with the first source; a first transformer core; and a first plurality of primary windings wound about the first transformer core and electrically coupled with the first switch. The second adder circuit including a second source; a second switch electrically coupled with the second source; a second transformer core; and a second plurality of primary windings wound about the second transformer core and electrically coupled with the second switch. The high voltage inductive adder comprising one or more secondary windings wound around both the first transformer core and the second transformer core and an output coupled with the plurality of secondary windings.