Tuofei Watches Lecture Hall – Language’s Classic Double Chase Chronograph Mechanism

The double-tracking needle function is adopted by major brands with research and development capabilities as an upgrade mechanism of chronographs, with the purpose of launching ultra-complex watches of this brand. At present, the brand that has impressed me is the watchmaker Patek Philippe, the research and development expert Audemars Piguet, and the successful revival of the brand Lange, which was launched at the Geneva exhibition in 2013. Lange’s chronograph is very prominent among many similar ones. It inherits the essence of German watchmaking. The clever design of the mechanism is one aspect. The polishing technology of excellence is a magic weapon for many followers to worship.

Lange 1815 Commemorative 421.025

technical background

The background of the chronograph’s dual chasing seconds mechanism was that in the year, when the players crossed the finish line, there was a long enough interval to record the readings. The dual chasing seconds hand stopped for each player, in order to catch up with the chronograph Repeat for the next player. The original purpose of double tracking is to record the values ​​of multiple time periods, not for the accuracy of timing. It is this design philosophy that makes double tracking seconds more and more valued by watchmakers, creating extremely sophisticated double tracking. Seconds mechanism.

Appearance characteristics

A typical double-seconds chronograph has two long seconds: one is a standard chronograph second hand that can start, stop and return to zero; the other is a chronograph second hand superimposed directly on top of the standard chronograph second hand, and the chase button is operated by the chase button There are two actions of stopping and catching up. The basic operation steps of chasing hands are as follows: in the first step, start the chronograph function and start the chronograph with the two seconds hands; in the second step, press the chase second button to stop the chase second hand at the top and continue to rotate the lower chronograph second hand; , Press the chronograph second button again, the chronograph second hand located at the top quickly catches up with the chronograph seconds hand below, and both continue to rotate simultaneously.

(TIPS: Everyone needs to pay attention to that the second hand is running synchronously with the chronograph second hand under normal circumstances, which means that the start, stop and return to zero are all synchronized.)

Appearance characteristics


There are four characteristics of the chase seconds structure: chase seconds wheel, chase seconds caliper, chase seconds wheel, and chase seconds start and stop lever. Among these four features, the start-stop lever is responsible for the two operation steps of the above-mentioned chase hands-stop and chase hands, and it directly talks with the chase seconds timing wheel, this part of the principle is consistent with the working principle of the chronograph. Under normal circumstances, the spurs of the chronograph seconds wheel will lift the two protrusions of the chronograph seconds caliper in the middle position so that the chronograph seconds hand can rotate synchronously with the chronograph seconds hand. The second timer wheel rotates, and the two protrusions of the second timer caliper enter the gap of the column gear of the second timer wheel, the second brake caliper closes the brake second timer wheel, and the second timer stops; the button again drives the second timer to start and stop. After levering, the chase seconds wheel rotates again, and the two protrusions of the chase seconds caliper are raised again by the teeth of the chase seconds wheel, and the chase seconds wheel is released. The connecting spring quickly resets the chronograph second wheel and the chronograph second wheel through elastic tension, and rotates the timing synchronously.

Structural feature map

Author Reviews

The chronograph occupies a very special position in the functional category of mechanical watches. It has a large number of followers and followers. Although its chronograph function does not have many opportunities for ordinary people to display, the original reason for its birth place Has also been forgotten. So why are so many people keen on chronographs? I think the reason is that the timing mechanism is one of the many functions of a mechanical watch that can best embody the beauty of the machine. It perfectly explains the true value of the machine. The timing mechanism, especially with the dual chase function, presents us a great meal-various gears, weird-shaped levers and the plywood carrying them are carefully polished and decorated, while the blue screws and red gems are embellished with the finishing touch. It’s all intoxicating.