1. Tensed spring with two contact points
As the direction is entirely controlled by the double cone, the lyre spring ® can act exclusively as a positioning and return force. By having only two contact points, the lyre spring ® features a maximised active length. Its degree of tension when at rest guarantees the stability of the bearing in a stable position, while its reserve elasticity enables it to react instantly to shocks.
2. Double-cone director
This exclusive configuration recentres the endstone and its bushing while ensuring the direction of travel is always perpendicular to the balance-staff. Pivots are therefore not subjected to any stress.
When a watch is dropped and hits the floor from a height of a metre, its acceleration is around 5,000 g; in other words, the balance is subjected to a force equivalent to 5,000 times its own weight! The reaction threshold of the Incabloc ® shock absorber is around 35 grams.
The system works in two phases:
the energy of the shock, transferred by the resistant part of the balance (the staff) is entirely absorbed by the bearing block (buffer);
the system immediately returns to the exact centre (through the action of the lyre spring ® ).
Geometry …
The space between the pierced jewel and the endstone of the Incabloc ® shock absorber forms an “oil sump” of optimised shape and size in order to keep the drop of lubricant perfectly centred and protected from dust.
… physics and chemistry!
The stones are given an exclusive epilame coating that alters the physical and chemical characteristics of the surface. The drop of oil takes on a very compact curved shape, thus enhancing its resistance to spreading.
Tested oil retention
The quality of the treatment is tested in the workshops using the “JPR process” of Laboratoire Dubois SA and oil numbers. 4, 5 or 6. The shape of the drop corresponding to the quality required for an epilame-coated surface is shown below.
Resistance to washing is also tested. The “anti-spreading” properties of the treated surfaces are retained even after eight successive ultrasonic washes in a chlorinated bath.
(Lubrication done outside the watch) Unhook and lift the lyre-spring® (it can’t get lost because it is held by its hinge). Let the endstone and bushing come out. Place the drop of oil on the flat side of the endstone and cover it with the bushing. The two surfaces will adhere through capillary action and can be inserted together in the block. Bring down and secure the lyre-spring®.
(with the automatic oiler) By inserting and withdrawing the oiler, holding it at right angles to the block to avoid leaving oil traces on the walls of the balance shaft. Warning! Do not force the bushing and the endstone beyond the functional limit of their travel and do not exceed the spring’s elasticity. For added security place the endstone on a holder with a buffer stop.
General rule: the drop of oil should not exceed two-thirds of the diameter of the pierced jewel (not the endstone).
Driving in, Driving out (sous)
Driving in, Driving out (sus)
Incabloc ® shock absorbers and all their components can be replaced by original parts.
After-sales service is provided by:
HOROTEC SA
Av. Léopold-Robert 105b
2300 La Chaux-de-Fonds
T. +41 32 925 95 95
horotec.ch
Swiss movement manufacturers
Swiss watch manufacturers
German movement and watch manufacturers
Double cone shock absorber
The enduring classic, recognised by the Swiss watch industry for over 80 years. Its exclusive design ensures the automatic recentring of the bushing and endstone while keeping the line of travel perpendicular to the balance staff. The pivots are therefore not subjected to any stress. By having only two contact points, the lyre spring ® maximises its active length.
Single-cone shock absorber
Fitted with a single cone to minimise its thickness, as well as a spring specifically designed to reduce its diameter as much as possible while maintaining optimal performance.
Novodiac®
Shock absorber for economical calibres.
Incabloc SA
Rue de la Paix 129
CH-2301 La Chaux-de-Fonds
incabloc@incabloc.ch
T. + 41 32 924 00 05
F. + 41 32 924 00 06
support jewel «PA»
flat olive jewel «GO»
domed jewel «B»
domed olive jewel «BO»
flat jewel with two recesses «G2C»
flat olive jewel with two recesses «G2CO»
semi-flat jewel «MG»
semi-flat olive jewel «MGO»
domed semi-flat jewel «MGB»
domed olive semi-flat jewel «MGBO»
flat jewel «G»
olive support jewel «PAO»
domed olive support jewel «PABO»
support jewel with polished ribbon «PARP»
domed support jewel with polished ribbon «PABRP»
support jewel domed on both sides with polished ribbon «PAB2XRP»
support jewel domed on both sides «PAB2X»
endstone «CP»
domed endstone «CPB»
endstone domed on both sides «CP2B»
domed endstone with off-centre recess «CPBCD»
endstone
recess + domed «CPCB»
pin «GOU»
flat jewel with cone-shaped recess «GC»
