Two oscillating bodies in close proximity influence each other and eventually synchronize; this phenomenon is known as resonance. In traditional watchmaking, with resonance techniques the accuracy and precision of mechanical timepieces can be improved.
However, this sophisticated and demanding horological technique has rarely been attempted, let alone mastered. In the pursuit of horological accuracy, precision, and rate stability resonance has generally involved utilizing two independent mainsprings, gear trains, escapements, and balances, each connected by a rack and pinion to allow fine tuning of the distance between them. Precise adjustment of the distance between the two regulators is necessary to incite resonance, which sees the two balances finding a concurrent rhythm in opposite directions so as to continuously average out errors for maximum accuracy.
Christiaan Huygens (1629-1695), inventor of the pendulum clock, was the first to discover the resonance of two separate pendulum clocks, which he logically surmised should keep slightly different time. When hung from a common beam, however, the pendulums of the adjacent clocks synchronized; subsequent researchers confirmed that the common wooden beam coupled the vibrations and created resonance. The two pendulums functioned as one in a synchronous manner. In the eighteenth century, Abraham-Louis Breguet demonstrated his mastery of the phenomenon with his double pendulum resonance clock.
The advantages of resonance are threefold:-
- A stabilizing effect on timekeeping (advantageous to accuracy).
- A conservation of energy (think of a professional cyclist riding in the shadow of another cyclist in a racing situation).
- A reduction of negative effects on timekeeping accuracy due to outside perturbation such as shock to the balance staff, which in turn keeps the rate more stable and increases precision.
To provide an idea of how difficult the horological execution of this concept is, an exhaustive list of watchmakers that have successfully used resonance in an extremely limited number of timepieces includes Antide Janvier (1751-1855), Abraham-Louis Breguet (1747-1823), so few modern clock- and watchmakers that they can likely be counted on one hand.
ARMIN STROM, a full-fledged manufacture with in-house manufacturing capability, has developed a special mechanical movement incorporating resonance techniques. The resonant Caliber ARF15 is a classically constructed manually wound movement that was conceived, manufactured, assembled, and regulated in-house. It beats at a 3.5 Hertz (25,200 vph) frequency, allowing the observer to really appreciate the patented, resonant regulators in action. The movement is resolutely modern, with a novel, yet impeccably executed finish providing a roomy and stable stage for the real show: the symmetrical twin display of seconds, which are bound by a single spring.
This is because it is not the balance wheels that Armin Strom’s technical team has connected using the resonance clutch spring, but rather the balance spring studs, which receive the impulses. The case band pusher at 2 o’clock resets the luminous twin seconds’ displays to zero, simultaneously resetting the twin balance wheels. The Mirrored Force Resonance is the most complicated timepiece that Armin Strom manufactures and a patent has been registered on it.
Claude Greisler’s idea behind the Mirrored Force Resonance was to create an innovative way of improving an old concept, one that is horology’s very reason for being: precision and accuracy. ARMIN STROM’s Mirrored Force Resonance is a new, better, and more interesting way of executing and displaying an old idea. The raison d’être of the Mirrored Force Resonance is to display the interesting functionality of the resonant balances while improving the watch’s overall precision. The resonance clutch spring provides the watch with a fascinating and patented “animation” of the way it functions. This remains in line with the philosophy of ARMIN STROM as a brand: no nonsense, just good, proprietary mechanics presented in an impeccably finished and interesting way. The resonance clutch spring is exciting in another way, too: it visually proves this timepiece’s resonance.
Model: RG15-RF.5N MIRRORED FORCE RESONANCE FIRE
ARMIN STROM calibre ARF15 in house movement, 16½‘‘‘
Manual-winding, resonance clutch spring, twin display of seconds, off-centre time indications
Frequency: 25,200 vph
Number of components: 226
Impulse: Two independent, symmetrically mirrored regulators
Plate and bridges:Plate and bridges are decorated at the highest quality level
Regulating system: Two independent regulation systems that stabilize each other connected by a resonance clutch spring
Power reserve:48 hours
Hours, minutes, twin display of seconds
18kt rose gold
Sapphire crystal and case back with antireflective treatment
Water resistance: 50m
Dial ring: Black with founded appliques
Hands: Rose gold
Delivered with a genuine brown alligator horn-back strap and 18kt rose gold ardillon buckle as well as an additional brown rubber strap
A double-folding clasp in 18kt rose gold is available as an option
Limited to 50 pieces