Grandfather clock

longcase clocklongcase clocksgrandfather clockslongcasefloor clocklong case clocktall-case clockbonnetcase clockComtoise or Morbier clock
A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, or floor clock) is a tall, freestanding, weight-driven pendulum clock with the pendulum held inside the tower or waist of the case.wikipedia
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Pendulum

pendulumssimple pendulumpendula
A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, or floor clock) is a tall, freestanding, weight-driven pendulum clock with the pendulum held inside the tower or waist of the case.
In the case of a typical grandfather clock whose pendulum has a swing of 6° and thus an amplitude of 3° (0.05 radians), the difference between the true period and the small angle approximation (1) amounts to about 15 seconds per day.

Pendulum clock

regulator clockClock pendulumregulator
A grandfather clock (also a longcase clock, tall-case clock, grandfather's clock, or floor clock) is a tall, freestanding, weight-driven pendulum clock with the pendulum held inside the tower or waist of the case.
The long narrow clocks built around these pendulums, first made by William Clement around 1680, became known as grandfather clocks.

Seconds pendulum

one second pendulumtwo-second period
Almost all longcase clocks use a seconds pendulum (also called a "Royal" pendulum ) meaning that each swing (or half-period) takes one second.
The long narrow clocks built around these pendulums, first made by William Clement around 1680, became known as grandfather clocks.

Anchor escapement

deadbeat escapementdeadbeatpocket watch
The advent of the longcase clock is due to the invention of the anchor escapement mechanism by Robert Hooke around 1658.
The anchor escapement was probably invented by British scientist Robert Hooke around 1657, although some references credit clockmaker William Clement, who popularized the anchor in his invention of the longcase or grandfather clock around 1680.

Movement (clockwork)

movementmovementswatch movement
Traditionally, longcase clocks were made with two types of movement: eight-day and one-day (30-hour) movements.
One source recommends servicing intervals of: 3–5 years for watches, 15–20 years for grandfather clocks, 10–15 years for wall or mantel clocks, 15–20 years for anniversary clocks, and 7 years for cuckoo clocks, with the longer intervals applying to antique timepieces.

Striking clock

strikingchiming clockrack and snail
Eight-day clocks are often driven by two weights – one driving the pendulum and the other the striking mechanism, which usually consisted of a bell or chimes.
Home striking clocks, such as mantel clocks, cuckoo clocks, grandfather clocks and bracket clocks are also common.

Clock face

dialfacehour hand
The case often features elaborately carved ornamentation on the hood (or bonnet), which surrounds and frames the dial, or clock face.
Longcase clocks (grandfather clocks) typically use Roman numerals for the hours.

My Grandfather's Clock

Grandfather's ClockGrandfather Clocksong
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 Oxford English Dictionary says the song was the origin of the term "grandfather clock" for a longcase clock.

Mora clock

clocks
In Sweden a special variety of longcase clocks was made in Mora, called Mora clocks.
Gustavian Mora clocks are a type of longcase clock which were made in, and derived their name from, the town of Mora in Dalarna province, Sweden.

Thomas Tompion

Tompion
Within the year Thomas Tompion, the most prominent British clockmaker, was making them too.
Another of Tompion's innovations was to create a numbering system for his spring and longcase clocks, which is thought to be the first time that a serial numbering system was applied to manufactured goods.

Rønne

RönneDK RNN
They were sent for repair to a turner named Poul Ottesen Arboe in Rønne and as a result of his repair of them he learned enough about clocks to begin to make his own.
Rønne also became famous for its longcase clocks or Bornholmerure which were manufactured from the middle of the 18th century until around 1900.

Whittington chimes

Many also offer the option of Whittington chimes or St. Michael's chimes, selectable by a switch mounted on the right side of the dial, which also allows one to silence the chimes if desired.
The chimes are found in many early English bracket and longcase clocks.

John Harrison

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John Harrison, Wakefield/Barrow-in-Furness/London
Harrison built his first longcase clock in 1713, at the age of 20. The mechanism was made entirely of wood.

John Alker

J.Alker of Wigan
John Alker or Alker of Wigan, Lancashire
John Alker (fl. 1797–1832), aka Alker of Wigan, was one of a family of longcase clock makers from Wigan, Lancashire.

Pullstring

pull cordpull chainpull-string
To wind a chain-driven longcase clock, one pulls on the end of each chain, lifting the weights until the weights come up to just under the clock's face.
Some grandfather clocks have a pullchain to raise the weights in order to wind the clock's gears.

Henry Clay Work

Henry C. WorkHenry WorkWork
The song was composed by an American songwriter by the name of Henry Clay Work who discovered a long grandfather clock in The George Hotel in Piercebridge, in County Durham in England.
A massive hit was "My Grandfather's Clock", published in 1876, which was introduced by Sam Lucas in Hartford, Connecticut, and again secured more than a million sales of the sheet music, along with popularizing the phrase "grandfather clock" to describe a longcase clock."

Morbier

Comtoise clocks, also known as Morbier clocks or Morez clocks, are a style of longcase clock made in the French region Franche-Comté (hence their name).
From 1680 to 1920, Morbier was, with Morez, the center of Comtoise clock production.

Morez

Morez FR
Comtoise clocks, also known as Morbier clocks or Morez clocks, are a style of longcase clock made in the French region Franche-Comté (hence their name).
From 1680 to 1920, Morez was with Morbier the center of Comtoise clock production.

Howard Miller Clock Company

Howard MillerHekman Furniture Company
Howard Miller Clock Company – Zeeland MI
The Howard Miller Company is a Zeeland, Michigan based manufacturer of longcase clocks and other home furnishings.

Simon Willard clocks

SimonSimon Willardown brand of tall clocks
Simon Willard (1753–1848), Roxbury, Massachusetts
After one more year, Simon built his first tall clock.

Ridgeway Clocks

Ridgeway
Ridgeway Clocks (Owned now by Howard Miller Clock Co.)
Ridgeway Clocks is a division of Howard Miller Company, and is a producer of longcase clocks, mantle clocks, and wall clocks.

Timothy Mason (clockmaker)

Timothy Mason
Timothy Mason Gainsborough, Lincolnshire
Mason was known for constructing longcase clocks with eight-day movements, with two keyholes on either side of the dial.

Antique

antiquesantique dealerheirloom
Today they are kept mainly for their decorative and antique value.

Robert Hooke

HookeDr Robert HookeHooke, Robert
The advent of the longcase clock is due to the invention of the anchor escapement mechanism by Robert Hooke around 1658.

Verge escapement

verge and foliotfoliotcrown wheel and verge escapement
Prior to that, pendulum clock movements used an older verge escapement mechanism, which required very wide pendulum swings of about 80-100°.