Method for manufacturing spiral spring for mechanical clock movements of mechanical clock, involves providing spiral spring with spring axis, where spiral spring has average height in direction parallel to its spring axis

摘要

The method involves providing a spiral spring (1) with a spring axis (UA), where the spiral spring has an average height in a direction parallel to its spring axis. The spiral spring is made from silicon. A silicon oxide-upper surface coating is generated on a silicon-core of the spiral spring, where the upper surface coating has a thickness exceeded over the dimension that is necessary for minimizing the temperature dependence of the return constant of the spiral spring.