The shock absorbing systems are used in the mechanical movements to protect the critical alignment of the axes of the rocker in the event of a shock.
The anti-shock system protects the balance pins by means of very thin steel springs (mounted at the end of axes). Normally a timepiece (also called ” ruby “) is inserted to hold each end of axis. The pivots and rubies of the pendulum are very fragile in comparison with the mass they have to bear. Without shock protection, the smooth running of the movement would be quickly disrupted.
“Incabloc” is a trademark . This system, invented by Fritz Marti, associate of G. Braunschweig , uses a spring in the form of a lyre allowing the support of the balance to slide to the retention formed by the spring, and to return to its place after the impact, guided by The lyre. The pivot does not move with respect to the ruby, it is the assembly which is free to move in the retention of the spring.
New types of pendulum use a simplified system where the support of a larger ruby can move.
In 1933, the Incabloc anti-shock system was produced in series by the company “Porte-Echappement Universel SA”, and introduced in West End SA Watch Company watches as early as 1934.
Other similar shock- absorbing systems exist: ” Etachoc ” produced by ETA , ” Kif ” produced by KIF Parechoc SA , ” Diashock ” produced by Seiko , or ” Parashock ” produced by Citizen .
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