telegraph relay

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• Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …   Wikipedia

• relay — relay1 n. /ree lay/; v. /ree lay, ri lay /, n., v., relayed, relaying. n. 1. a series of persons relieving one another or taking turns; shift. 2. a fresh set of dogs or horses posted in readiness for use in a hunt, on a journey, etc. 3. Sports. a …   Universalium

• Relay league — A relay league is a chain of message forwarding stations in a system of optical telegraphs, radio telegraph stations, or riding couriers.An interesting description of these early 19th century methods and its evolution into the electrical… …   Wikipedia

• Telegraph sounder — A Telegraph sounder is a device which produces an audible sound when connected to an operating electrical telegraph. It is similar in form to a relay. When a current flows through the induction coil, the resulting magnetic field attracts an… …   Wikipedia

• relay — n. & v. n. 1 a fresh set of people or horses substituted for tired ones. 2 a gang of workers, supply of material, etc., deployed on the same basis (operated in relays). 3 = relay race. 4 a device activating changes in an electric circuit etc. in… …   Useful english dictionary

• 2008 Summer Olympics torch relay — 2008 Summer Olympics Bid process Venues Marketing Concerns and controversies Torch relay (route) Opening ceremony (flag bearers) Medal table (medalists) Closing ceremony Event calendar …   Wikipedia

• Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… …   Wikipedia

• Frame relay — In the context of computer networking, frame relay consists of an efficient data transmission technique used to send digital information. It is a message forwarding relay race like system in which data packets, called frames, are passed from one… …   Wikipedia

• Transatlantic telegraph cable — The first transatlantic telegraph cable crossed the Atlantic Ocean from Foilhommerum, Valentia Island, in western Ireland to Heart s Content, in eastern Newfoundland. The transatlantic cable bridged North America and Europe, and expedited… …   Wikipedia

• Microwave radio relay — is a technology for transmitting digital and analog signals, such as long distance telephone calls and the relay of television programs to transmitters, between two locations on a line of sight radio path. In microwave radio relay, radio waves… …   Wikipedia

• K9YA Telegraph — Infobox Magazine title = K9YA Telegraph image size = 150px image caption = K9YA Telegraph , June 2008 editor = Philip Cala Lazar, K9PL editor title = Editor frequency = Monthly circulation = category = Amateur radio company = publisher = Robert F …   Wikipedia