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Woodcut of medieval clockmaker, 1568 Lateral view of a Timothy Mason longcase clock movement with striking mechanism, c. 1730. A clockmaker is an artisan who makes and/or repairs clocks. Since almost all clocks are now factory-made, most modern clockmakers only repair clocks.
A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
The escapement is a mechanism in a mechanical clock that maintains the swing of the pendulum by giving it a small push each swing, and allows the clock's wheels to advance a fixed amount with each swing, moving the clock's hands forward. The anchor escapement was so named because one of its principal parts is shaped vaguely like a ship's anchor.
The following excerpts from a letter written by Patrice Gunville, the daughter of Harley Mayenschein, give some detail of the history of the clock: [2] The very first original design (before patent) was simple 1 ⁄ 4 × 1 ⁄ 4 inch strips of wood which the balls would roll on, much like the design of railroad tracks. [Harley Mayenschein] had ...
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 ...
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A second type of clock face is the 24-hour analog dial, widely used in military and other organizations that use 24-hour time. This is similar to the 12-hour dial above, except it has hours numbered 1–24 (or 0–23) around the outside, and the hour hand makes only one revolution per day.
“Very small,” she said, pointing to the slug, “like a .22.” As so many other patients do, the patient asked the trauma surgeons if they were going to take the bullet out, and the surgeons explained that they fix what the bullet injures, they don’t fix the bullet. They left the wound open to prevent infection and put a dressing on it.
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