relay-operated

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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 program — The Relay program consisted of Relay 1 and Relay 2, two early American satellites.Relay 1 was launched December 13 1962, and was principally a communications satellite. Included in its payload were radiation experiments designed to map Earth s… …   Wikipedia

• relay — [1] An electro magnetically operated switch used to make and break the flow of current in a circuit. As low amperage current is passed through one circuit of the relay, it switches and permits a greater current through another line. For example,… …   Dictionary of automotive terms

• Relay valve — A relay valve is an air operated valve. It is most commonly used in air brake systems to control the brakes at the rear of a trailer in a tractor trailer truck.It would take too long for sufficient air to travel from the brake pedal valve to the… …   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

• Internet Relay Chat — IRC redirects here. For other uses, see IRC (disambiguation). For IRC channels dedicated to Wikipedia, see Wikipedia:IRC Internet Relay Chat (IRC) is a protocol for real time Internet text messaging (chat) or synchronous conferencing.[1] It is… …   Wikipedia

• Owned-and-operated station — O O redirects here. For the defragmentation utility, see O O Defrag. For other uses, see Oo (disambiguation). In the broadcasting industry (especially in North America), an owned and operated station (frequently abbreviated as O O) usually refers …   Wikipedia

• Protective relay — See also: Power system protection In electrical engineering, a protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers …   Wikipedia

• Wire spring relay — A wire spring relay is a type of relay, primarily manufactured by the Western Electric Company for use by the Bell System in electromechanical telephone exchanges. It was licenced for use around the world, and was commonplace in Japan. A wire… …   Wikipedia

• Control relay — A control relay is an electromechanical device which activates one or more switches according to the current through a coil not connected to the switches. The thyristor is a semiconductor device which carries out similar functions.A relay is… …   Wikipedia

• Video Relay Service — A Video Relay Service (VRS) is a telecommunication service that allows deaf, hard of hearing and speech impaired individuals to communicate over the phone with hearing people in real time, using a sign language interpreter. In America, the… …   Wikipedia