Abstract:
A contrast bathing physiotherapy device (1) has local thermoelectric cells (7) which heat or cool a localised part of a patient's body (B) via a Cu heat spreader 6 and a flexible thermal interface pad (15). Cooling is augmented by a bias bank (21) of thermoelectric cells which draw heat from the local bank (7) via a looped heat pipe (10). The heat pipe (10) has an evaporator in a Cu block (8) at the local bank (7) and a condenser in a Cu block (20) at the bias bank (21).
Abstract:
An ac/dc converter (1) has a closed loop controller (3) to maintain a well regulated output voltage (V o ) with low peak-to-peak ripple. A resonant capacitor ( C in ) across the rectifier bridge ( D R1 -D R4 ), and a resonant inductor ( L R ) between the bridge and the isolation transformer provide inherent power factor correction. A clamping diode ( D CL ) is connected between the dc rectifier bridge positive terminal and the bulk capacitor ( C B ). There is also a second resonant capacitor ( C t ) across the isolation transformer. There is zero voltage switching of the power switches ( Q1 , Q2 ).
Abstract:
An optical slip ring system (1) has a rotor interface (2) which can bolt on to a high speed rotor in a modular manner. The rotor interface (2) has circular circuit boards (7) containing the necessary drive circuits and power supply circuits for transducers mounted on the rotor. The drive circuit on the boards (7) drive three rings of emitter LEDs (9). The drive is frequency modulated and there are a number of transducers associated with each ring of emitter LEDs (9). These signals are frequency division multiplexed to ensure real time processing takes place. A fixed support (3) has a single receiver LED (15) associated with each ring of emitter LEDs (9). Contactless power is provided by an inductive power supply having a primary winding (16) on the fixed support bracket (3) and a secondary winding (10) on the rotor interface (2).
Abstract:
An optical slip ring system (1) has a rotor interface (2) which can bolt on to a high speed rotor in a modular manner. The rotor interface (2) has circular circuit boards (7) containing the necessary drive circuits and power supply circuits for transducers mounted on the rotor. The drive circuit on the boards (7) drive three rings of emitter LEDs (9). The drive is frequency modulated and there are a number of transducers associated with each ring of emitter LEDs (9). These signals are frequency division multiplexed to ensure real time processing takes place. A fixed support (3) has a single receiver LED (15) associated with each ring of emitter LEDs (9). Contactless power is provided by an inductive power supply having a primary winding (16) on the fixed support bracket (3) and a secondary winding (10) on the rotor interface (2).
Abstract:
A dental floss device (1, 40, 50, 60, 70) comprises a handle (2) having a shank (3) terminating in a head piece (4). A disposable dental floss holder (5) comprises a base portion (10) and a pair of spaced-apart jaws (11, 12) with a length of dental floss (13) extending therebetween. The head piece (4) has a groove (20) in which the base portion (10) is securely retained when the device is used in all flossing directions. Snap-fit projections (15) extend inwardly from the jaws (11, 12) of the floss holder (5) and are retained behing marginal edges (25) of a floor (24) of the groove (20). When used, the floss holder (5) is removed and a new floss holder (5) is fitted.
Abstract:
A DNA probe specific for A. salmonicida is disclosed. The probe can be used in methods of detecting or determining A. salmonicida in a locus comprising screening with the probe a sample of material taken from the locus containing or suspected of containing A. salmonicida. The sample can be water, a bacterial culture, fish tissue, salmonid faeces or a sample derived from sediment, influent or effluent from a locus used in the rearing of salmonids.