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A group of tell-tales showing lights for "brake fluid", "stop lamp" and "check engine" Graphical tell-tales. A tell-tale, sometimes called an idiot light [1] or warning light, is an indicator of malfunction or operation of a system, indicated by a binary (on/off) illuminated light, symbol or text legend.
Tire-pressure gauge; V. Vacuum gauge This page was last edited on 13 July 2023, at 18:52 (UTC). Text is available under the Creative Commons Attribution ...
Telltale or tell-tale may refer to: Advisory devices in vehicles: Tell-tale (spacecraft), a status indicator in a spacecraft control system; Tell-tale (sailing), a piece of fabric attached as a guide for adjusting a sail; Tell-tale (bridges), cords or chains suspended from bridges to warn vehicle drivers of low clearance
The line is the equivalent of a gauge function; it need not be straight. Almost any line is a valid gauge fixing, i.e., there is a large gauge freedom. In summary, to tell whether the rod is twisted, the gauge must be known. Physical quantities, such as the energy of the torsion, do not depend on the gauge, i.e., they are gauge invariant.
A tell-tale warning of a low clearance over a road. A tell-tale, also known as a bridge warning, is a series of ropes suspended over railway tracks to give warning to the engineer, and more importantly the brakeman who may be scampering across the tops of the cars, that the train is approaching a low-clearance obstacle, such as a tunnel or a bridge.
Further, the vacuum in the gauge eventually deteriorates due to slow diffusion of gases through the mercury, making the device inaccurate. [8] In 1938, Adolph Zimmerli (1886–1967) [9] invented a gauge that overcame the filling problems, at least for pressures below ambient pressure. [10] Zimmerli's gauge consists of three relatively wide columns.