专利归零装置为朗格所独有，佩戴者可透过这项便利的功能快速且精准地设定时间。当拉出表冠后，机芯便会掣停，而秒针亦会归零，令分针与分钟刻度对齐，然后按照鸣响报时准时重新启动腕表，这使腕表同步更为容易。
归零装置
Display: Convenient time-setting. The zero-reset mechanism.
Under a transparent representation of the RICHARD LANGE JUMPING SECONDS the zero-reset mechanism is shown and correctly positioned. After removal of the watch outlines, the operation of the mechanism is shown several times from different perspectives. The zero-reset hammer strikes the heart cam and drives it, together with the seconds hand, to the zero position. The mechanism finishes by turning to the rear-side view. Individual components are named.
此装置由复杂杠杆系统组成，将归零杠杆压向心形凸轮。秒针连接至心形凸轮旋转的同一心轴上。当心形凸轮透过归零杠杆转动至原来位置，秒针亦会跳回零位。再次将表冠按回原位，即可重新启动机芯及其秒针。
这个装置的改良版本结合更复杂的装置设计，1815 TOURBILLON便是一例，不同的是，陀飞轮必须停动，摆轮则不受此限制。
1815 TOURBILLON的归零装置
