Grandfather clock
tall, freestanding, weight-driven pendulum clock
A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, hall clock or floor clock) is a tall, freestanding, weight-driven pendulum clock, with the pendulum held inside the tower or waist of the case. Clocks of this style are commonly 1.8–2.4 metres (6–8 feet) tall with an enclosed pendulum and weights, suspended by either cables or chains, that have to be occasionally calibrated to keep the proper time. The case often features elaborately carved ornamentation on the hood (or bonnet), which surrounds and frames the dial, or clock face.
The English clockmaker William Clement is credited with developing the form in 1670. Pendulum clocks were the world's most accurate timekeeping technology until the early 20th century. Furthermore, longcase clocks, due to their superior accuracy, served as time standards for households and businesses. Today, they are kept mainly for their decorative and antique value, having been superseded by analog and digital timekeepers.
Naming
The Oxford English Dictionary states that the popular 1876 song "My Grandfather's Clock" is responsible for the common name "grandfather clock" being applied to the longcase clock.
The song was composed by the American songwriter Henry Clay Work, who discovered a longcase clock in The George Hotel in Piercebridge, County Durham, England. When he asked about the clock, he was informed that it had two owners.
“Grandfather clock” enters the record as tall, freestanding, weight-driven pendulum clock. Crown Archives preserves that source wording while asking what Grandfather, clock and tall can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q10781974. The Library of Congress control number is sh85078282. 1 of 1 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1670 and 1876.
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This entry incorporates text from “Grandfather clock” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.