Abstract: Device for producing a frothed liquid comprising a chamber 13 opened to atmosphere with a transverse bottom wall 14 and a longitudinal upward wall 15, at least one diluent inlet 18, at least one liquid delivery outlet 20, wherein the diluent inlet is provided through the upward wall and is dimensioned and oriented for directing a thin jet of diluent in the chamber, and wherein the at least one liquid delivery outlet is configured in the bottom wall for liquid to rise up along the side of the upward wall by the jet of diluent entering the chamber as a result of the direction and dimension of the diluent inlet in the chamber.

Abstract: A medical tubing and slide clamp set is disclosed for use with a medical infusion pump designed for operation with a preselected medical tubing set having predetermined size and functional characteristics. The medical tubing and slide clamp includes a preselected medical tubing set having predetermined size and function characteristics. An opaque slide clamp is provided with a grasping end and a longitudinal clamp plate extending from the grasping end. The longitudinal clamp plate defines a clamp slot with a wide open portion sized for receiving the preselected medical tubing without closing the tubing, a narrow open portion sized for closing the tubing and a transition portion interconnecting the narrow and wide portions. A plurality of orifices are formed along the longitudinal clamp plate at predetermined locations arranged according to the size and functional characteristics of the medical tubing set.

Abstract: A medical tubing and slide clamp set is disclosed for use with a medical infusion pump designed for operation with a preselected medical tubing set having predetermined size and functional characteristics. The medical tubing and slide clamp includes a preselected medical tubing set having predetermined size and function characteristics. An opaque slide clamp is provided with a grasping end and a longitudinal clamp plate extending from the grasping end. The longitudinal clamp plate defines a clamp slot with a wide open portion sized for receiving the preselected medical tubing without closing the tubing, a narrow open portion sized for closing the tubing and a transition portion interconnecting the narrow and wide portions. A plurality of orifices are formed along the longitudinal clamp plate at predetermined locations arranged according to the size and functional characteristics of the medical tubing set.

Abstract: A method of radio frequency (RF) welding of a flexible PVC sheet to a rigid copolyester carrier by holding a flexible PVC sheet and a rigid copolymer carrier together between heated RF dies. A predetermined temperature differential is maintained between the RF dies, with the flexible sheet side at a higher temperature than the rigid carrier side and adjusted so that a weld plane is established along the interface between the PVC and the copolyester. An RF weld signal is passed through the first and second RF dies and the PVC and copolyester therebetween, so that the flexible PVC sheet and the copolyester rigid carrier partially melt and become welded together at the weld plane.

Abstract: A rotation control for a device to be rotated includes a variable speed DC motor having a constant rotational speed upon receiving a selected fixed voltage electrical input power from an adjustable electrical input power supply connected to the motor for supplying the selected fixed voltage. A switch circuit is connected between the motor and the power supply activatable in response to a first electrical signal to turn the motor "on" and activatable in response to a second electrical signal to turn the motor "off". A selectable frequency, regular interval electrical signal device is connected to the switch circuit to provide electrical signals to activate the switch circuit to turn the motor "on" at regular intervals. An encoder wheel is coupled to the device to be rotated and to the motor for rotation of the timing disk at a speed proportional to the constant rotational speed of the motor. The timing disk has a plurality of openings around the disk with predetermined spacing there between.

Abstract: A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

Abstract: A flow limiter mechanism for use with an infusion pump of the type operating upon a disposable cassette held by the infusion pump and having a flow tube connected to the cassette. The flow limiter includes a receiving channel located on the infusion pump adjacent to the disposable cassette held by the infusion pump. A tube pincher is operatively associated with the receiving channel to pinch the flow tube in a clamped position and mechanically retractable to an unclamped position to allow the flow tube to open. Electrical controls are connected for selectably operating the tube pincher from the clamped closed position to the unclamped opened position while the disposable cassette is held by the infusion pump. A flow clip is attached to the flow tube and is manually operable between opened and closed clipping positions prior to inserting the disposable cassette into the infusion pump.

Abstract: A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

Abstract: Eddy current based method and apparatus uses a repetitive square wave signal applied to an excitation coil and operates in a pulse echo mode by gating the detected field signal at synchronized intervals to generate one or more sequences of like gated slices obtained from respective detector positions on a circular scan path. Suitable time gating to exclude surface and near-surface reflections overcomes surface clutter and flaws are detected by examination of the sequence of slices for characteristic changes in level. Both method and apparatus have special application for crack investigations at rivet fasteners or similar, e.g. in airframes, and have ability to cope with ferrous fasteners in non-ferrous material. Excitation coil and magnetic detector are combined in a probe and the latter is driven around a circular scan path. A centering display is derived by examination of the near-surface reflection signal to determine the position and level of the peak slice level on the scan path sequence of slices.

Abstract: A private mobile radio transmission system comprising a plurality of geographically spaced base stations (BS) defining a plurality of overlapping service areas (SA). The base stations are coupled for example by land-line communication links (CL) to a system controller (SC). Mobile stations (MS) equipped with simplex two-way radios are free to roam through the service areas. In order to be able to make a call with or via a base station it is necessary for the mobile station to be registered with the base station concerned. Details of the registration are stored by the mobile station concerned and the base station.

Abstract: A multiple user radio system comprising at least one primary station and a plurality of secondary stations by way of a control channel. The primary station in use sets a value, in a transmitted message from which a secondary station wanting to economise on power can derive a period during which it can switch-off at least its radio section. The radio system may comprise a radiopaging system or a radio trunking system using an Aloha protocol. In the case of a radio trunking system using an Aloha protocol, the value comprises the Aloha number.

Abstract: This invention relates to the parenteral infusion of fluids into patients, and particularly to the addition of drugs or other secondary fluids in infusion systems operating on an automatic basis.

Abstract: Measurement apparatus receives a signal from an eddy current transducer (20) excited by a generator (24). A signal generator (21) generates a signal at a predeterminable reference level which is combined with the transducer signal to produce a measurable signal at output (23). The output of the signal generator (12 ) is determined by a set balance control (15) which may be set by amplitude controls (29,30) in accordance with control coefficients applied via data bus 43. The output of the signal generator (21) may be predetermined iteratively in a calibration phase preceeding measurement. The present invention overcomes the problem of providing an inactive matched eddy current transducer to balance the signal provided by the measurement transducer (20). A second transducer (49) may be switched (50) to replace the signal generator (21) to enable positioning of the measurement transducer (20) with respect to a workpiece.

Abstract: Apparatus for the detection of cracks or other defects near the surface of a conducting engineering material of interest includes a magnetic probe having two sites which in operation act as magnetic poles on the same side of the probe such that an external magnetic field extends between them principally in a region adjacent to that one side of the probe, means for rotating the probe about an axis spaced from the mid-point between the two sites, whereby when the probe is adjacent to the surface of an engineering material of interest occupying the region with the axis substantially perpendicular to the surface the magnetic field is able to penetrate the surface and rotate beneath it about the axis causing energy associated with the magnetic field to be dissipated in the material, and means for detecting a change caused by a defect in the material, to the dissipated energy.