Astroclock LINKS. LINKS (Newest links in yellow) Astronomical Clocks/ Planetariums: Eise Eisinga Planetarium Planetarium Zuylenburgh Festo Harmonices Mundi Giovanni de Dondi Astrarium Prague Astronomical clock Andreas Nilsson - The Astronomical Clocks of Rasmus Sørnes Astronomische Uhr Ulm - (German) Henk Olthof - Achterhoeks Planetarium (Dutch) Sean Gallagher - Negative Space.
Eric Freitas- Welcome - Planetarium Friesland. World's Most Visited Watch Forum Site. HYT H2 Hydro Mechanical Watch. Watch Anatomy. Case: Consisting of a watch's middle, bezel, and back, it protects and houses the movement inside.
It can be made from different metals and in different shapes. The examples below illustrate common case shapes currently being produced. Crystal: The Crystal is a 'glass' covering the dial or 'face' of the watch, protecting it from dirt and water. There are three major types of crystals produced and used in watch making. Synthetic Sapphire: This transparent, lab grown element has exactly the same chemical composition as natural sapphire. Mineral: Mineral crystals are made of glass. Acrylic: Acrylic is the most affordable type of crystal. Mechanical Watch Movements. Rolling Ball Clock. CNC Cookbook: Astronomical Clock. Notes on Constructing an Orrery / Antikythera Mechanism I've always had a great interest in Astronomy, and I read with great interest recent articles about the Antikythera Mechanism, which was apparently an ancient orrery or simulator of motions of the heavenly bodies.
The machine, which was constructed circa 80 BC, could represent the motions of most heavenly bodies known in its time using a clockwork consisting of 37 gears. Differential Gear Mechanism Was Way Ahead of Its Time... The front dial would show the progression of the Sun and Moon through the Zodiac according to the ancient Egyptian calendar.
The lower back dial gives the Metonic cycle, the Synodic cycle, and the Lunar year of 12 Synodic months. Front and Back of a Reconstructed Model of the Antykthera Mechanism This Model May Be Closer. Cogworks. Gearless Clock. * GadgetBuilder.com * Last Modified: 04 April 2014 04:58 MST Click to Enlarge After reading Dr.
Philip Woodward's "My Own Right Time", I was inspired to build a copy of his gearless clock. John Wilding's construction book for this clock provides details that simplify construction although (as usual) I made some "improvements". The minimal number of parts and their unusual construction made this a delightful project, enhanced by the fact that this clock obviously wanted to run. The picture above (left, with yellow string replacing the stylish pink drive string) was taken during a trial of the weight/drive system. Overview Dr. Clock Parts Terminology. Gary's wooden clocks. The Astrarium. His "Tractatus Astrarii" is preserved in the Capitular of Padua.
It is written in medieval Latin and is completed with sketches showing such an accuracy and clarity to be comparable to those of modern engineering. SeeSaw Gravity Escapement. Summary This article describes a novel clock escapement, termed The SeeSaw Gravity Escapement1,2, in which, paradoxically, the pendulum controls the escapement, but the pendulum is 'unaware that the escapement exists'.
A proof-of-concept model is described which demonstrates the feasibility of the escapement3. In addition, two alternative modes of impulse are described. Background The escapement has three important functions: 1. Pendulum. 2. 3. Aforementioned tasks. Furthermore: 42 escapement. Astroclock LINKS. 18th century. The Wandering Hour display (also known as a Floating Hour or Chronoscope) has been around four centuries.
In 1656 the Campanus brothers had built a night clock for Pope Alexander XII. In a total innovation, they replaced the then conventional hands with hour figures on rotating discs, which performed a semicircular arc across the clock face. The correct figure appeared at the start of each new hour. It then moved clockwise across the arc of the dial and, depending on its progress, simultaneously marked the quarter or half-hour, which had just passed. Alexander's night pendulum clock was illuminated by an oil lamp so that the pope could see the time in the dark.
"It is a deceptively simple and elegant system, and it is literally as old as the combination of concentric hours and minutes hands to which we are so accustomed. -- The orbit of the elegantly simple planetary ring, and the epicyclic dance of hour numerals which surrounded it, remained hidden beneath a solid dial. " Wooden Clock Sculptures created by James Borden. Wooden clock plans and complete kits for scrollsaw and CNC.