bar"ret*ter(?), n. [OF. bareter to exchange. Cf. Barter.] 1. (Electronics) a resistor inserted into a circuit to compensate for changes (such as those arising from temperature fluctuations); a thermal cymoscope. Syn. -- ballast resistor.
[Webster 1913 Suppl. + WordNet 1.5]
The original form consisted of an extremely fine platinum wire loop attached to terminals and inclosed in a small glass or silver bulb. It operates by increased resistance when subjected to the influence of an electric current. In a later variety, called the
liquid barretter, wire is replace by a column of liquid in a very fine capillary tube. A recent version has a resistor composed of an iron wire in a glass bulb containing hydrogen, with the temperature variation of resistance such that the current passing through it remains constant over a wide range of applied voltages.
[Webster 1913 Suppl. + PJC]
New - Add Dictionary Search to Your Site
You can add a free dictionary search box to your own web site by copying and pasting the following HTML into one of your web pages:
<form action="http://www.freedict.co.uk/search.php" method="post"> <p style="text-align: center; font-family: sans-serif;"> <a style="font-weight: bold;" href="http://www.freedict.co.uk/" title="FreeDict free online dictionary">FreeDict</a> <input type="text" name="word" size="20" value="" /> <input type="submit" name="submit" value="Search Dictionary" /> </p> </form>
Sun 16th February 2020