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The Sessions Clock Company ("Sessions") was one of several notable American clock companies centered in Connecticut.Sessions and its predecessor (E.N. Welch Company), along with the E. Ingraham Company, the Ansonia Clock Company, the New Haven Clock Company, the Seth Thomas Clock Company, the William L. Gilbert Clock Company, and the Waterbury Clock Company collectively produced most of the ...
Pendulum clock conceived by Galileo Galilei around 1637. The earliest known pendulum clock design, it was never completed. Vienna regulator style pendulum wall clock. A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic ...
A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...
This clock has clear synthetic ruby pallets. (Dial on the right side.) The Riefler escapement is a mechanical escapement for precision pendulum clocks invented and patented [1] by German instrument maker Sigmund Riefler in 1889. [2] It was used in the astronomical regulator clocks made by his German firm Clemens Riefler from 1890 to 1965, [3 ...
Seth Thomas Clock Company. The Seth Thomas Clock Company was founded by Seth Thomas in Plymouth Hollow, Connecticut, and began producing clocks in 1813. [1] It was incorporated as the "Seth Thomas Clock Company" in 1853. [citation needed] Plymouth Hollow, a part of the town of Plymouth, was incorporated in 1875 as the town of Thomaston, named ...
For 50 years, Willard was responsible for the periodic maintenance of all clocks at Harvard College in Cambridge, Massachusetts. Additionally, he oversaw Harvard's management of its clocks. Willard presented two clocks to Harvard. One was a tall-case clock; the other was a wall-mounted regulator clock that was installed in a room near ...
Grasshopper escapement, 1820. The grasshopper escapement is a low-friction escapement for pendulum clocks invented by British clockmaker John Harrison around 1722. An escapement, part of every mechanical clock, is the mechanism that gives the clock's pendulum periodic pushes to keep it swinging, and each swing releases the clock's gears to move forward by a fixed amount, thus moving the hands ...
Movement (clockwork) In horology, a movement, also known as a caliber or calibre (British English), is the mechanism of a watch or timepiece, as opposed to the case, which encloses and protects the movement, and the face, which displays the time. The term originated with mechanical timepieces, whose clockwork movements are made of many moving ...