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It was bulky and tall, and made pocket watches unfashionably thick. [14] If the mainspring broke and had to be replaced, a frequent occurrence with early mainsprings, the fusee had to be readjusted to the new spring. If the fusee chain broke, the force of the mainspring sent the end whipping about the inside of the clock, causing damage.
Roy Ehrhardt (1993) European Repeaters & Clock Watches, Book 1, Heart of America Press. ISBN 0-913902-72-1. A compilation of repeaters and clock watches found in auction catalogs over the years. 170 pages. A picture and a description of each watch is given. The watches are sorted by functions and brands. The Book 2 has not been released yet.
The first stem-wind and stem-set pocket watches were sold during the Great Exhibition in London in 1851 and the first owners of these new kinds of watches were Queen Victoria and Prince Albert. Stem-wind, stem-set movements are the most common type of watch-movement found in both vintage and modern pocket watches.
"William Simcock Massey Type III pocket watch". YouTube. Archived from the original on 2021-12-12 Video of antique mid-19th century watch showing the balance wheel turning; Costa, Alan (1998). "The History of Watches". Atmos Man. Archived from the original on 2007-07-17 History of watches, on commercial website.
Jacques-Frédéric Houriet (1743–1830), Swiss watchmaker, Le Locle, pocket watch, tourbillon. [1] Jules Jürgensen (1745–1811), Danish watchmaker and manufacturer, Le Locle, pocket watch, longcase clock. Peter Kinzing (1745–1816), German clockmaker and mechanic. Daniel Möllinger (1746–1794), German clockmaker, Heidelberg, city clock maker.
Verge watches and clocks are sensitive to changes in the drive force; they slow down as the mainspring unwinds. [36] This is called lack of isochronism. It was much worse in verge and foliot clocks due to the lack of a balance spring, but is a problem in all verge movements.
Pocket watch with gears labelled. The going train is the main gear train of the timepiece. It consists of the wheels that transmit the force of the timepiece's power source, the mainspring or weight, to the escapement to drive the pendulum or balance wheel. [4] The going train has two functions.
The first self-winding mechanism was invented for pocket watches in 1770 by Abraham-Louis Perrelet, [62] but the first "self-winding", or "automatic", wristwatch was the invention of a British watch repairer named John Harwood in 1923. This type of watch winds itself without requiring any special action by the wearer.
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