Co-Axial Escapement
The English watchmaker George Daniels developed the so-called Co-Axial escapement in the 1970s , which got its name from two gear wheels arranged one above the other on a shaft . The aim is to combine the advantages of the armature escapement - safe self-starting, vibration-proof and no risk of double tripping - with those of the chronometer escapement - low-friction drive and extensive independence from lubrication. The result is an escapement with four pallets, two of which are resting pallets on an anchor . The others are impulse pallets, one of which sits on the armature and the other on the balance wheel. The impulse is not given over an inclined plane as with the lever escapement , but with low friction, as with the chronometer escapement (see also coaxial escapement ).
The advantages and disadvantages were discussed on the basis of a high -quality gait model. The much lower, but not absolute independence from lubrication is bought at the cost of efficiency losses, because the complicated function results in more dead travel of the escape wheel. Since this can only have eight teeth, another wheel is required in the transmission. Similar to the chronometer escapement, there is a risk of destruction if disassembled without careful consideration. The company Omega began in 1999 with the production of watches according to this system.