Abstract:
The present invention relates to an endless conveyor grader (1) suitable for use in grading tubers (4) or the like. The endless conveyor comprises an endless grid screen (21) supported on endless drive transmission means (37) at opposite sides (23, 25) of said endless grid screen (21). There are provided at opposite sides (23, 25) of the endless grid screen (21) pathway, endless drive transmission guide means (36, 39) formed and arranged so as to define at least one cascade (40) or step (40) in the endless grid screen pathway. The cascade(s) or step(s) (40) allow for tumbling, in use of the grader, of tubers (4) passing over the cascade(s) (40) or step(s) so as to provide the required movement of the tubers (4) on the grid screen (21) to facilitate the grading process. The grid screen comprises parallel support bars provided with a multiplicity of 'I'-shaped link members (46) bridging between the support bars (47) so as to allow the grid screen to change direction in the endless grid screen pathway.
Abstract:
A relatively lightweight "motivator buoy" (15), constrained by guides (3) attached to a ballasted "floating platform" (1) of contrasting and static buoyancy characteristics, reciprocates vertically by wave action, lifting water via a piston (20) and cylinder (4) through automatic non-return valves (21, 22) into a pressurised storage compartment (23) incorporating a compressible medium such as an airspace, thence turning a water turbine (10) and electricity generator (11), or alternatively providing a hydraulic power source for other uses. Modules so constructed may be linked by an above-water framework to form continuous arrays (Figs. 7, 8, 9 not shown).
Abstract:
A tubular portion apparatus (10; 100; 300; 400) to be secured and sealed to another tubular (36) is described as is a method of securing and sealing a tubular portion (10; 100; 300; 400) to an existing downhole tubular (36) such as a casing string (36). The tubular portion (10; 100; 300; 400) comprises a central portion (14), an upper (16) and a lower (18) portion adjacent to the central portion (14) along a longitudinal axis of the tubular portion (10; 100; 300; 400). The tubular portion (10; 100; 300; 400) is formed from a main material and an additional material to strengthen the upper (16) and the lower (18) portion of the tubular portion (10; 100; 300; 400).
Abstract:
A TV Internet browser is described. The TV Internet browser includes features which facilitate the browsing of the Internet from a television including, for example, support for 3D pointing, scrolling and zooming/panning mode control, and adaptations to support entry of text into text boxes, searching, and other features.
Abstract:
The present invention provides a high-performance and small sized helical antenna element and array thereof for use in an aircraft communication system or the like, where stringent spatial restrictions and gain requirements generally apply. The performance of the array is enhanced by increasing the lateral distances between the antenna elements over a portion of the elements where the windings thereof have high current amplitude. The sweeping envelope of the array is maintained small by recovering the initial distancing over a portion of the elements where the windings thereof have low current amplitude.
Abstract:
A booster system is disclosed, comprising a first rotor stage having a plurality of first rotor blades spaced circumferentially around a rotor hub with a longitudinal axis and having a first pitch-line radius extending from the longitudinal axis, a last rotor stage located axially aft from the first rotor stage, the last rotor stage comprising a plurality of last rotor blades spaced circumferentially around the longitudinal axis and having a second pitch-line radius extending from the longitudinal axis, and a gooseneck duct located axially aft from the last rotor stage and capable of receiving an airflow, the gooseneck duct comprising an inlet end and an exit end located at a distance axially aft from the inlet end and having at least one plasma actuator mounted in the gooseneck duct.
Abstract:
Systems and methods according to the present invention provide a user interface for television control functionality. Control elements overlaid on video, DVR user interfaces and playlist creation tools, interacting with users via a pointing device, are described.
Abstract:
A boost type power supply circuit for providing a DC output voltage comprising first and second semiconductor switches coupled between respective input lines and a common connection; an AC input voltage from an AC source being supplied across the input lines; first and second diodes coupled in series with respective ones of the switches; third and fourth diodes coupled across respective ones of the switches in a free-wheeling relationship with the switches; an inductance coupled in at least one of the input lines; a controller for controlling the conduction times of the switches by providing a pulse width control signal to each of the switches; wherein the controller turns on at least one of the switches during a positive half cycle of the AC voltage to allow energy storage in the inductance and turns off the at least one switch to allow the energy stored in the inductance to be supplied to an attached load through one of the first and second diodes and one of the third or fourth diodes; and the controller turns on at least one of the switches during a negative half cycle of the AC voltage to allow energy storage in the inductance and turns off at least one switch to allow the energy stored in the inductance to be supplied to the attached load through one of the first and second diodes and one of the third and fourth diodes. The controller determines an on-time and an off-time of a pulse of the pulse width modulated control signal during each half cycle of the AC voltage, the on-time and off-time of the pulse being controlled to regulate said output voltage and to provide power factor correction of said AC input voltage, based on either voltage sensing or current sensing.
Abstract:
Absorbents, suitable for absorbing sulphur compounds such as hydrogen sulphide from gases and liquids, in the form of shaped units having an average size within the range 1-10 mm and containing at least 75 % by weight of an absorbent material comprising copper carbonate, basic copper carbonate, and/or copper hydroxide. The units preferably have a bulk density of at least 0.9 kg/l, especially at least 1.2 kg/l. The units are preferably agglomerates containing a small amount of a binder such as a cement and may also contain a proportion of alumina to catalyse hydrolysis of carbon-containing sulphur compounds such as carbonyl sulphide or carbon disulphide.
Abstract:
A tubular portion apparatus (10; 100; 300; 400) to be secured and sealed to another tubular (36) is described as is a method of securing and sealing a tubular portion (10; 100; 300; 400) to an existing downhole tubular (36) such as a casing string (36). The tubular portion (10; 100; 300; 400) comprises a central portion (14), an upper (16) and a lower (18) portion adjacent to the central portion (14) along a longitudinal axis of the tubular portion (10; 100; 300; 400). The tubular portion (10; 100; 300; 400) is formed from a main material and an additional material to strengthen the upper (16) and the lower (18) portion of the tubular portion (10; 100; 300; 400).