Abstract:
The concentration of xenon, in a medical gas mixture of xenon as an active component with a known composition of oxygen and, optionally, nitrogen and/or helium recirculating through a medical device (103) in which carbon dioxide is introduced into the mixture, is monitored by removal (135, 133) of carbon dioxide downstream of the medical device (103) and subsequently passing the carbon dioxide-free gas through an ultrasonic gas analyser (143) upstream of the medical device. The gas analyzer determines the xenon concentration by measuring the time delay between transmission of an ultrahigh frequency ultrasonic pulse of at least 100 kHz axially through the sample chamber from a location at one end thereof and reflection of said pulse axially from the other end of the sample chamber back to said location. An analyser of novel construction is disclosed.
Abstract:
A winglet (114) is attached to a wing tip (112) by a main beam (132) which extends into the wing tip (112) and is attached to the rear spar (118). A canted spar (134) also extends to be attached proximate the forward spar (116).
Abstract:
A system for opening a window in a casing string (42) positioned in a wellbore (32). The system includes a hydraulic pressure intensifier (116) having a housing and a piston assembly with a differential piston area. The piston assembly is longitudinally shiftable relative to the housing and is initially secured relative thereto to prevent longitudinal movement therebetween. An anchor assembly (114) is operable to longitudinally secure the hydraulic pressure intensifier (116) within the casing string (42). A window opening tool (118) operably associated with the hydraulic pressure intensifier (116) is operably engagable with the casing string (42) such that when the anchor assembly (114) is longitudinally secured within the casing string (42) and the piston assembly is unsecured relative to the housing under hydrostatic pressure, longitudinal movement of the piston assembly transmits a force to the window opening tool (118), thereby opening the window in the casing string (42).
Abstract:
A combustor includes a first wall, a second wall, an injector grommet, a combustor longitudinal axis, and a connection assembly indirectly connecting the first wall to the second wall. A portion of the injector grommet is disposed within a groove of the connection assembly.
Abstract:
A two-stroke engine (1) including, an engine block (2) having a cylinder (3), a double-ended piston (4) received for reciprocation in the cylinder (3), the piston (4) comprising a body having first and second opposing ends (7, 9), the first end (7) forming a wall of the combustion chamber (8), the second end (9) forming a wall of a pre-compression chamber (10), the piston (4) including a piston opening (11) between the first and second ends (7, 9); at least one passage extending from the pre-compression chamber (10) to the combustion chamber (8) for charging the combustion chamber(8); a connecting rod (6) operatively connecting the piston (4) to a crankshaft (5), and characterised in that the piston opening (11 ) encloses the connecting rod (6) and the crankshaft (5) protrudes through the piston opening (11).
Abstract:
A stage of a multi-stage, self-timed datapath circuit calculates one or more data outputs as a function of one or more data inputs. Data outputs are calculated by multiple logical elements that operate simultaneously and produce internal results as inputs to other logical elements within a stage. An internal completion signal generator detects completion of a predetermined set of the internal results calculation and, in response, generates an completion signal for each internal result detected. A done signal generator receives the completion signals and, in response to one or more preselected combinations of the completion signals, provides a done signal. The done signal is generated with a predetermined delay such that the delay is at least as long as a time it takes for the stage to calculate a final result.
Abstract:
A method and apparatus for mechanically reshaping and/or forming textured features in the side wall of metal can bodies in which a can body is mounted on a profiled mandrel and rolled along a second mandrel or rail, which is also profiled. The tools are made from hard material but the second mandrel or rail is resiliently mounted. This mounting has been found to facilitate control of the depth of the profiled features formed in the can body. In particular, the problem of depth variability which will arise due to expansion of the machine and tooling in normal running conditions, or variability in thicknesses in the can body is avoided. Typically, the can body is clamped between complementary unformed regions on the tools during forming so as to prevent wrinkling or localised thinning of the can side wall.