What’s a Breguet Overcoil and why does Rolex care?
In 1795, Louis Breguet invented the Breguet Spiral, otherwise known as the Breguet Overcoil. The Breguet Spiral is essentially a traditional flat hairspring, but the end of the spring bends up back over the top of the spring, anchoring the “pivot point” of the spring closer to it’s center.
Breguet Overcoil Hairspring | WatchTime - USA's No.1 Watch …
A hairspring with a sharply curved outer end. This terminal curvature improves the spring’s concentric development compared to hairsprings with flat spirals. Click below for a video of a Breguet Overcoil Hairspring in action...
Week 5, Days 3 & 4 (Forming Breguet Overcoils) - watchmaking …
2014年6月14日 · In a watch with a Breguet Overcoil, the hairspring is able to expand and contract evenly all the way along the length of the spring which will reduce the errors in time-keeping that are found in flat hairsprings.
Are there any physical limitations as to why breguet...
2013年9月16日 · The Breguet overcoil improves the centering (concentricity) of the spring, particularly in vertical positions. This immensely improves the performance in different positions by reducing the differences between horizontal and vertical positions.
The Breguet or Overcoil Hairspring - BUZZUFY
2018年9月24日 · If AB should be located too far from the balance staff, then the hairspring will cause the watch to have a losing rate in the low arcs and a gaining rate in the high arcs of motion. In the watch, an efficient overcoil keeps the other coils of the hairspring concentric as they wind and unwind, thus removing side thrust which is a major ...
A Technical Perspective - A Guide To The Hairspring
2017年6月12日 · For more details about the whole regulating organ of the watch (balance, materials, tourbillon, adjustment) and also the overcoil of the hairspring – including the famous Breguet type – you can check our technical article about regulating organs here.
What is an overcoil hairspring? - The Watch Doctor
2023年9月17日 · In 1795 Abraham-Louis Breguet solved the problem by upraising the spring’s last coil and reducing its curvature, to ensure the concentric development of the balance spring. The Overcoil helps to equalize the action of the balance wheel so that it keeps the same time ( isochronous) either fully wound (the balance has a large amplitude) or run ...
A Complete Guide to the Regulating Organ - Monochrome Watches
2016年4月22日 · The Breguet overcoil, in which the outer coil is bent up inwards and attached near the balance staff, aims at achieving isochronism (having a constant period regardless of of the amplitude) allowing the spring to ‘breathe’ symmetrically and evenly.
In-Depth: Realising Breguet’s Dream of the Natural Escapement
2019年8月17日 · In keeping with its largely traditional construction, the hairspring has a Breguet overcoil formed by hand, a detail that speaks of the craft within the movement. Nonetheless, the detent lever is made of silicon, giving it precise geometry with the …
Discovering the Breguet Spring From Creation to Contemporary …
2023年7月21日 · The Breguet Spring, named after its inventor Abraham-Louis Breguet, is an essential part of the balance wheel assembly. It's essentially an overcoil hairspring, curled at its end to reduce the impact of gravity on the balance wheel's oscillations.