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| View Original: | Anchor escapement animation 217x328px.gif (217x328) | |||
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| Keywords: Anchor escapement animation 217x328px.gif anchor escapement used in pendulum clocks An escapement is a mechanism in a clock which gives the pendulum pushes to keep it swinging and at each swing releases the gear train to move forward a fixed amount thus moving the clock's hands forward at a steady rate The recoil or anchor escapement invented by Robert Hooke around 1658 and first applied to clocks around 1680 was the standard escapement used in pendulum clocks until the late 1800s when a more accurate variation called the deadbeat escapement superseded it It consists of an escape wheel yellow which is driven by the clock's gear train The pivoted anchor piece above it grey is attached to the clock's pendulum not shown which hangs below it The anchor has flat angled surfaces on each side called pallets which the escape wheel's teeth alternately catch and push on giving the pendulum impulses to replace the energy it loses to friction keeping it swinging This animation shows a typical anchor escapement found in a grandfather clock The clock has a seconds pendulum with a period of 2 seconds so each swing takes one second The escape wheel has 30 teeth and thus rotates once per minute so the clock's second hand can be attached to its shaft The amplitude or width of swing of the pendulum in this example is about 8° a little wider than many quality anchor clocks which have amplitudes of 3° - 6° Of this angle the lift or drive angle the angle of forward swing over which the pendulum receives drive force is 5° while the remaining 3° consists of the recoil The animation illustrates one of the disadvantages of the anchor recoil which means the pendulum pushes the escape wheel backwards during part of each cycle Recoil reverses the clock's gear train all the way back to the driving weight each swing of the pendulum causing increased wear and inaccuracy Schéma animé d'un recul ou échappement à ancre utilisée dans pendules inventé par Robert Hooke en 1657 Аними ованные диаг аммы из отдачи или анке ного спуска используемого в маятниковых часов Animierte Grafik eines Rückstoß oder Ankerhemmung in Pendeluhren verwendet wird von Robert Hooke im Jahre 1657 erfunden Diagramma animato di un contraccolpo o scappamento ad ancora utilizzati in orologi a pendolo inventato da Robert Hooke nel 1657 Diagramma animato di un contraccolpo o scappamento ad ancora utilizzati in orologi a pendolo inventato da Robert Hooke nel 1657 Geanimeerde diagram van een terugslag of ankergang gebruikt in slingerklokken uitgevonden door Robert Hooke in 1657 Diagrama animado de un retroceso o escape de áncora utilizado en relojes de péndulo inventado por Robert Hooke en 1657 2014-06-03 08 06 32 own Chetvorno Anchor escapement animation 315x478px gif is a larger version of the same animation cc-zero Uploaded with UploadWizard Recoil Escapement Animations of clocks | ||||
