Compensation pendulum

Definitions

  • Webster's Revised Unabridged Dictionary
    • Compensation pendulum a clock pendulum in which the effect of changes of temperature of the length of the rod is so counteracted, usually by the opposite expansion of differene metals, that the distance of the center of oscillation from the center of suspension remains invariable; as, the mercurial compensation pendulum, in which the expansion of the rod is compensated by the opposite expansion of mercury in a jar constituting the bob; the gridiron pendulum, in which compensation is effected by the opposite expansion of sets of rods of different metals.
    • Compensation pendulum See Pendulum.
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Chambers's Twentieth Century Dictionary
    • Compensation pendulum a balance-wheel or pendulum so constructed as to counteract the effect of the expansion and contraction of the metal under variation of temperature
    • Compensation pendulum a pendulum so constructed that its rod is not altered in length by changes of temperature
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Etymology

Chambers's Twentieth Century Dictionary
L., neut. of pendulus, hanging—pendēre, to hang.

Usage

In literature:

But his most important invention, at this early period of his life, was his compensation pendulum.
"Men of Invention and Industry" by Samuel Smiles
He is like a compensation pendulum which corrects expansions and contractions and keeps time anywhere.
"Expositions of Holy Scripture" by Alexander Maclaren
Then he read on about racks, and snails; weights, pendulums, bobs, and compensations.
"The Weathercock" by George Manville Fenn
A capital bit of horology, the pendulum of which is usually compensated to sidereal time, for astronomical purposes.
"The Sailor's Word-Book" by William Henry Smyth
It is fitted with mercury compensation pendulum and electrical seconds contact.
"Astronomical Instruments and Accessories" by Wm. Gaertner & Co.
The clock, constructed by Dent, with the assistance of the Astronomer Royal, is true to a second of time, and has a compensation pendulum.
"Old and New London" by Walter Thornbury
A pendulum with a rod of dry varnished deal is tolerably compensated by a bob of lead or of zinc 10-1/2 to 13 in.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
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In science:

The pendulum, with a measured torque noise floor below 10 fN m/√Hz from 0.6 to 10 mHz, has allowed placement of an upper limit on sensor force noise contributions, measurement of the sensor electrostatic stiffness at the 5% level, and detection and compensation of stray dc electrostatic biases at the millivolt level.
Achieving geodetic motion for LISA test masses: ground testing result
Thus, measurement and balancing of ∆φ looks feasible at the mV level with the torsion pendulum and could provide a valuable ground test of the compensation technique suggested here.
Possibilities for Measurement and Compensation of Stray DC Electric Fields Acting on Drag-Free Test Masses
Gravity gradients were measured with a specially designed gradiometer pendulum that could be configured to give sensitivity to a particular mulitpole component of the gradient; this information had been used to design the gradient compensators shown in figure 2.
Torsion-balance tests of the weak equivalence principle
The ratio of the twist signals with the WEP and gradiometer pendulums in the two compensator positions determined the effects of gravity gradients on the WEP pendulum; this was used to correct the WEP signal.
Torsion-balance tests of the weak equivalence principle
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