relay contact actuating time
1Control 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… …
2Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… …
3Switch — For other uses, see Switch (disambiguation). Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle… …
4Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 …
5Glossary of firefighting — Note: This list does not include firefighting equipment, i.e., tools and apparatus used by firefighters. Please refer to Glossary of firefighting equipment for such terms. : Note: This list is incomplete. You can help Wikipedia by… …
6revelation — revelational, adj. /rev euh lay sheuhn/, n. 1. the act of revealing or disclosing; disclosure. 2. something revealed or disclosed, esp. a striking disclosure, as of something not before realized. 3. Theol. a. God s disclosure of Himself and His… …
7Edouard Branly — Edouard Branly † Catholic Encyclopedia ► Edouard Branly French physicist and inventor of the coherer employed in wireless telegraphy, born at Amiens, 23 October, 1846. After receiving his early education at the Lycée of St. Quentin,… …
