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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] which were perhaps the most accurate all-mechanical pendulum clocks made.
The Riefler escapement, used in Clemens-Riefler regulator clocks was accurate to 10 milliseconds per day. Electromagnetic escapements, which used a switch or phototube to turn on a solenoid electromagnet to give the pendulum an impulse without requiring a mechanical linkage, were developed.
Sigmund Riefler was born on 9 August 1847 to Magdalena and Clemens Riefler. He studied mathematics, geodesy and mechanical engineering at the Technical University of Munich, and then physics and astronomy at the University of Munich. From 1870 he worked as an engineer in the Royal Prussian Land Survey, surveying land in Schleswig. [3]
Riefler escapement; V. Verge escapement; Media in category "Escapements" This category contains only the following file. Figure 6.tif 1,220 × 908; 1.68 MB
Deadbeat escapement [37] diagram showing escape wheel (a), pallets (b), and pendulum crutch (c) The Graham or deadbeat escapement was an improvement of the anchor escapement first made by Thomas Tompion to a design by Richard Towneley in 1675, [38] [39] [40] although it is often credited to Tompion's successor George Graham who popularized it ...
Escapement An escapement is a mechanism that allows the wheel train to advance, or escape a fixed amount with each swing of the balance wheel or pendulum. It consists of a gear called an escape wheel which is released one tooth at a time by a lever that rocks back and forth. Each time the escape wheel moves forward it also gives the pendulum or ...
In horology, a wheel train (or just train) is the gear train of a mechanical watch or clock. [1] Although the term is used for other types of gear trains, the long history of mechanical timepieces has created a traditional terminology for their gear trains which is not used in other applications of gears.
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