Abstract:
An electronic drive system for a droplet spray generation device (10) has a droplet generator (11) with a perforate membrane (32) driven by a piezoelectric transducer (31). An electronic circuit controlsa power supply (21) to control the charging of a capacitor (22) to a supply voltage providing power to a power amplifier (23) connected to receive electric power from the capacitor and supply a drive signal to the piezoelectric transducer. The electronic circuitis also arranged to control the operation of the power amplifier (23) including the drive signal operating frequency at substantially its resonant frequency, where the resonant frequency is calculated by measuring and/or timing changes to the voltage across the capacitor whenthe droplet generatoris operatedin a plurality of bursts at different frequencies, by charging the capacitor (22) to a given voltage, and either actuating the droplet generator for a given time and either measuring the voltage drop across the capacitor at the end of the given time or the time taken to recharge the capacitor to the set value thereafter, or actuating the droplet generator and measuring the time taken for the voltage to fall to a known value,and determining as the resonant frequency of the droplet generator, the frequency at which respectively the time to recharge is the greatest, or the voltage drop is the greatest, or the time taken for the voltage to fall to the known value is shortest, and toset the drive signal operating frequency at the resonant frequency thus determined.
Abstract:
A method of coating an edible item. The method comprises applying molten polyol to the item and cooling the polyol to crystalise it into its solid form.
Abstract:
System for cleaning a device for projecting liquid as jets or droplets from multiple nozzles, the device having: a plurality of transducers (7) oriented substantially parallel to one another and each having an inner face and an outer face opposite said inner face, the transducers being arranged in a substantially planar array; a plurality of nozzles (13) to project liquid therefrom; liquid supply means for supplying a liquid to the nozzles; each nozzle is associated with an adjacent respective transducer which is excitable to cause movement of the adjacent associated nozzle in a direction substantially aligned with the nozzle axis, to project liquid therefrom; the liquid supply means supplies liquid to an inner end of said nozzle; means for selectively exciting transducers as required, thereby to project liquid as jets or droplets from the respective outer face by movement of the liquid through the nozzle in response to the movement of the nozzle; the system comprising a surface (50) disposed generally parallel to and spaced apart from the outer face of the transducers; wherein the actuation of the transducers causes movement of the nozzles and drives fluid through the nozzles.
Abstract:
A method of projecting liquid as jets or droplets from a nozzle (13) provided on a transducer (7) formed by a region of a material layer, the method comprising the steps of : supplying liquid to an inner end of the nozzle; exciting the nozzle to cause movement of the nozzle in a direction substantially aligned with the nozzle axis in order to project liquid as a droplet from an outer face of the nozzle; wherein the step of exciting the nozzle comprises sequentially driving the transducer with a first rising voltage change (40,44a, 45a, 46a, 47a, 48a), a first falling voltage change (41, 44b, 45b, 46b, 47b, 48b), a second rising voltage change (42, 44c, 45c, 46c, 47c, 48c) and a second falling voltage change; and wherein the first rising voltage change and the first falling voltage change are timed so that they enhance the movement of the material layer, and the second rising voltage change and the second falling voltage change are timed so that they substantially cancel the movement of the material layer.
Abstract:
Media for use with an activation printer, the media comprising at least one surface having an array of pixels deposited thereon, each pixel containing at least one activatable colourant, wherein different pixels have different colourants and the pixels are arranged in a predetermined pattern, such that, in use, a multicolour image can be produced when the paper is passed through an activation printer. An activation printer for use with the above media comprising means for detecting the pattern of pixels in the array on the media so that the printer is able to determine which pixels on the paper to activate in order to produce the desired multicolour image.
Abstract:
A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.
Abstract:
A cooking appliance (1, 11) comprising a heating component, an area for receiving an ingredient storage device (2, 12), control means and a cooking region (8a, 8b, 29). The ingredient storage device (2, 12) comprises a plurality of ingredient locations, each ingredient location storing an ingredient. The appliance (1, 11) is arranged to selectively control, in use, in accordance with instructions provided by the control means, the cooking position of the ingredient locations such that the ingredient in a location is only heated when said location coincides with the cooking region (8a, 8b, 29), to bring, in use, the ingredient to readiness for consumption at the same time.
Abstract:
A liquid dispensing device (10) comprising a chamber (11) in which a liquid to be dispensed is retained in use, the chamber having a first (17) and a second (18) opening; a one way valve (19) retained in the first opening to allow liquid flow only out of the chamber; a closure (13) slidably retained in the chamber to close the second opening, the closure including an actuator (22, 24) having a flexible element (21) which, upon actuation, is caused to extend into the chamber reducing its volume and thereby causing liquid to be expelled from the chamber through the valve, wherein, when actuation is stopped, the closure is caused to slide in the chamber so as to reduce the volume of the chamber by the amount of the dispensed liquid.
Abstract:
An animal product sampling device comprises a well arranged, in use, to collect fluid flowing through a fluid tube connected to the well, a drain, one end of which is connected to the well, which is arranged such that, in use, fluid from the well may pass to the fluid tube connected to the well, and a sample tube arranged, in use, to draw fluid from a zone of fluid of minimal turbulence within the well. The device is arranged such that, in use, the zone of fluid of minimal turbulence, from which a sample of fluid can be drawn through the sample tube, is created in the device due to the dimensions of the well and the drain. There is further provided an animal product sample transportation device and an animal product sample collecting device.
Abstract:
A valve mechanism is provided for use in an inhaler comprising a pressurised container, and a metering chamber, and a valve mechanism wherein the inlet and outlet valves are separate and can be operated independently. The pressure of the fluid in the canister is used to aid the opening of the outer valve so reducing the force to fire a dose. A variant of the valve mechanism allows the user to select from a range of dose volumes by appropriate orientation of the stem.