gridiron pendulum

gridiron pendulum
noun
: a compensation pendulum in which the unequal expansion of two different metals is utilized to maintain constant effective pendulum length

* * *

a clock pendulum having, as part of its shaft, an arrangement of brass and steel rods having different coefficients of expansion, such that the pendulum has the same length at any temperature.
[1745-55]

Useful english dictionary. 2012.

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  • Gridiron pendulum — Gridiron Grid i ron, n. [OE. gredire, gredirne, from the same source as E. griddle, but the ending was confused with E. iron. See {Griddle}.] 1. A grated iron utensil for broiling flesh and fish over coals. [1913 Webster] 2. (Naut.) An openwork… …   The Collaborative International Dictionary of English

  • Gridiron pendulum — The gridiron pendulum was an improvement of clock pendulums invented by John Harrison, consisting of alternating zinc and iron rods assembled so that their different thermal expansions (or contractions) cancel each other out. Its simplest form… …   Wikipedia

  • gridiron pendulum — a clock pendulum having, as part of its shaft, an arrangement of brass and steel rods having different coefficients of expansion, such that the pendulum has the same length at any temperature. [1745 55] * * * …   Universalium

  • Gridiron — may refer to: * Gridiron (cooking), type of grill that can be used to cook meat or other food over a fire; most of the other usages derive from this term due to their fancied resemblance * Gridiron plan, in urban planning, a system that describes …   Wikipedia

  • Gridiron — Grid i ron, n. [OE. gredire, gredirne, from the same source as E. griddle, but the ending was confused with E. iron. See {Griddle}.] 1. A grated iron utensil for broiling flesh and fish over coals. [1913 Webster] 2. (Naut.) An openwork frame on… …   The Collaborative International Dictionary of English

  • Gridiron valve — Gridiron Grid i ron, n. [OE. gredire, gredirne, from the same source as E. griddle, but the ending was confused with E. iron. See {Griddle}.] 1. A grated iron utensil for broiling flesh and fish over coals. [1913 Webster] 2. (Naut.) An openwork… …   The Collaborative International Dictionary of English

  • Pendulum — Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements …   The Collaborative International Dictionary of English

  • Pendulum bob — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English

  • Pendulum level — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English

  • Pendulum wheel — Pendulum Pen du*lum, n.; pl. {Pendulums}. [NL., fr. L. pendulus hanging, swinging. See {Pendulous}.] A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the… …   The Collaborative International Dictionary of English

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