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Brinkley Stick
A Brinkley stick is a safety device used to discharge high voltage capacitors and ensure HT (high voltage) electrical circuits are discharged. The tool consists of a hook attached to the end of an insulated rod. The hook is connected by a length of insulated wire to a suitable ground or earth, often via a suitably valued resistor. Named after Charles Brinkley, an amputee ferry boatman who carried radar staff across the river Deben. One of the Trade test colour films Trade test colour films were broadcast by the television network BBC2 in the early days of colour television in Britain during the long periods of the daytime when no regular programming was scheduled, with the exception of '' Play School''. The ..., ''On the Safe Side'' includes a fictionalised sequence during which the life of a technician is preserved by his decision to deploy a Brinkley stick. References {{tool-stub Safety equipment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Voltage
High voltage electricity refers to electrical potential large enough to cause injury or damage. In certain industries, ''high voltage'' refers to voltage above a certain threshold. Equipment and conductors that carry high voltage warrant special safety requirements and procedures. High voltage is used in electrical power distribution, in cathode ray tubes, to generate X-rays and particle beams, to produce electrical arcs, for ignition, in photomultiplier tubes, and in high-power amplifier vacuum tubes, as well as other industrial, military and scientific applications. Definition The numerical definition of depends on context. Two factors considered in classifying a voltage as high voltage are the possibility of causing a spark in air, and the danger of electric shock by contact or proximity. The International Electrotechnical Commission and its national counterparts (IET, IEEE, VDE, etc.) define ''high voltage'' as above 1000 V for alternating current, and at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capacitor
A capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance. While some capacitance exists between any two electrical conductors in proximity in a circuit, a capacitor is a component designed to add capacitance to a circuit. The capacitor was originally known as the condenser, a term still encountered in a few compound names, such as the ''condenser microphone''. The physical form and construction of practical capacitors vary widely and many types of capacitor are in common use. Most capacitors contain at least two electrical conductors often in the form of metallic plates or surfaces separated by a dielectric medium. A conductor may be a foil, thin film, sintered bead of metal, or an electrolyte. The nonconducting dielectric acts to increase the capacitor's c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground (electricity)
In electrical engineering, ground or earth is a reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Electrical circuits may be connected to ground for several reasons. Exposed conductive parts of electrical equipment are connected to ground, to protect users from electrical shock hazard. If internal insulation fails, dangerous voltages may appear on the exposed conductive parts. Connecting exposed parts to ground will allow circuit breakers (or RCDs) to interrupt power supply in the event of a fault. In electric power distribution systems, a protective earth (PE) conductor is an essential part of the safety provided by the earthing system. Connection to ground also limits the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the ground itself can be used as one condu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistor
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components can be composed of various compounds and forms. Resisto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Deben
The River Deben is a river in Suffolk rising to the west of Debenham, though a second, higher source runs south from the parish of Bedingfield. The river passes through Woodbridge, turning into a tidal estuary before entering the North Sea at Felixstowe Ferry. The mouth of the estuary is crossed by a ferry connecting Felixstowe and Bawdsey.Ordnance Survey of Great Britain History Both the river-name and the name of the village of Debenham are of uncertain origin and relationship, but one theory (of several on offer) is that the river's name was originally ''Dēope'' meaning 'the deep one'. The river-name, however, is not recorded in the form Deben before 1735, when it appears thus in Kirby's ''Suffolk Traveller''. The river, though still little more than a stream, is forded twice in the village, with one ford claimed to be among the longest in England. Tide mills at Woodbridge have operated off the tide from the river Deben since at least 1170. The present mill, built in 1793 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trade Test Colour Films
Trade test colour films were broadcast by the television network BBC2 in the early days of colour television in Britain during the long periods of the daytime when no regular programming was scheduled, with the exception of '' Play School''. The goal of these transmissions was to provide colour broadcasting in these intervals for use by television shops and engineers (the 'trade') to install, adjust and demonstrate their television sets. The earliest such transmission was made in 1956 (on the then sole BBC channel) but regular all-day-long films ran from autumn 1967 until August 1973. In all, 158 different films were broadcast; on average, each film was shown 90 times. The colour films provided moving colour images to allow tv dealers to demonstrate sets to customers. The decision to stop showing them followed the extension of broadcasting hours on BBC1 and ITV. This, together with the gradual move of schools programmes into colour, meant there was less need to provide moving pict ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UKAEA
The United Kingdom Atomic Energy Authority is a UK government research organisation responsible for the development of fusion energy. It is an executive non-departmental public body of the Department for Business, Energy and Industrial Strategy (BEIS). The authority focuses on United Kingdom and European fusion energy research programmes at Culham in Oxfordshire, including the world's most powerful operating fusion device, the Joint European Torus (JET). The research aims to develop fusion power as a commercially viable, environmentally responsible energy source for the future. record59 megajoules of sustained fusion energy was demonstrated by scientists and engineers working on JET in December 2021. United Kingdom Atomic Energy Authority owns the Culham Science Centre and has a stake in the Harwell Campus, and is involved in the development of both sites as locations for science and innovation-based business. On its formation in 1954, the authority was responsible for the Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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