a quartz watch
91Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …
92electronics — /i lek tron iks, ee lek /, n. (used with a sing. v.) the science dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors. [1905 10; see ELECTRONIC,… …
93Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
94Tuning fork — A tuning fork is an acoustic resonator in the form of a two pronged fork with the tines formed from a U shaped bar of elastic metal (usually steel). It resonates at a specific constant pitch when set vibrating by striking it against a surface or… …
95Balance wheel — in a cheap 1950s alarm clock, the Apollo, by Lux Mfg. Co. showing the balance spring (1) and regulator (2) …
96Pendulum clock — A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world s most accurate timekeeper, accounting for its… …
97Casio — Infobox Company company name = Casio Computer Co., Ltd. カシオ計算機株式会社 company company type = Public ( [http://quote.tse.or.jp/tse/quote.cgi?F=listing/EDetail1 MKTN=T QCODE=6952 Casio on TSE] ) company slogan = foundation = Tokyo (1946) location =… …
98Cuckoo clock — Cuckoo clock, a so called Jagdstück (Hunt piece), Black Forest, ca. 1900, Deutsches Uhrenmuseum, Inv. 2006 013 A cuckoo clock is a clock, typically pendulum regulated, that strikes the hours with a sound like a common cuckoo s call and typically… …
99Sinn (watchmaker) — Sinn is a watchmaker in Frankfurt am Main, Germany that was established by pilot and flight instructor Helmut Sinn in 1961. HistoryAfter its establishment, the company constructed instrumental watches and watches for pilots based on Mr. Sinn s… …
100clock — clock1 /klok/, n. 1. an instrument for measuring and recording time, esp. by mechanical means, usually with hands or changing numbers to indicate the hour and minute: not designed to be worn or carried about. 2. See time clock. 3. a meter or… …
